Researcher basic information

• Dr. Eng., Kyoto University

• https://researchmap.jp/read0165892?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200901047227516490
• http://www.eng.hokudai.ac.jp/labo/geomech/index.html

• 60359479

• 200901047227516490

• 地盤工学
• 数値解析
• 土砂災害
• 防災
• 舗装工学
• 積雪寒冷地
• 礫質土
• 交通荷重
• 主応力軸回転
• 繰返しせん断
• 凍結融解
• 路盤
• 環境技術
• 凍上
• 地球温暖化ガス排出削減
• 粒状構造物
• 繰返し塑性
• 主応力回転
• 路盤・路床
• 気候変動
• 鉄道
• 礫材
• 天然ガス
• 維持管理工学
• 不飽和土
• せん断試験
• 自然災害
• 水工水理学
• 移動荷重
• 斜面崩壊
• 粒子破砕
• 火山灰質土
• 凍結・融解作用
• 地盤防災
• 室内要素試験
• 寒冷地地盤防災工学
• Geotechnical Engineering(5203)

• Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Disaster prevention engineering
• Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Geotechnical engineering

• Bachelor's degree program, School of Engineering
• Master's degree program, Graduate School of Engineering
• Doctoral (PhD) degree program, Graduate School of Engineering

Research activity information

• Jun. 2022, 土木学会技術賞
• Jun. 2022, 地盤工学会技術業績賞
• Jun. 2019, 地盤工学会事業企画賞
• Jun. 2018, 地盤工学会事業企画賞
• Apr. 2018, 地盤工学会功績賞
• Sep. 2017, 平成29年度科研費の審査委員表彰

• Simulation-based prediction of ballast settlement under cyclic loading with moisture and aging considerations
  Liu Pan; Tatsuya Ishikawa; Lei Xu; Bin Yan
  Transportation Geotechnics, May 2026, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Slope stability-soil runout integrated analysis considering surface flow during heavy rainfall
  Xuesen Li; Tatsuya Ishikawa; Kiyonobu Kasama; Tingyong Zhang
  ENGINEERING GEOLOGY, 356, Sep. 2025, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Load transfer behaviour of super long piles in multi-layer soft soil through field testing and numerical 3D FEM modelling
  Thoi Huu Tra; Thanh T. Nguyen; Thien Q. Huynh; Tatsuya Ishikawa
  SOILS AND FOUNDATIONS, 65, 3, Jun. 2025, [Peer-reviewed]
  English, Scientific journal
• Role of road network for prevention and mitigation of runoff-induced geo-disaster under climate change
  Tatsuya Ishikawa; Tingyong Zhang; Wentao He; Yulong Zhu; Shima Kawamura
  Transportation Geotechnics, Jul. 2024, [Peer-reviewed], [Lead author]
  Scientific journal
• Response Prediction of Asphalt Pavement in Cold Region with Thermo-Hydro-Mechanical Coupling Simulation
  Junling Si; Tatsuya Ishikawa; Daoju Ren; Kimio Maruyama; Chigusa Ueno
  Sustainability (Switzerland), 15, 18, Sep. 2023, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Wide / narrow-area slope stability analysis considering infiltration and runoff during heavy precipitation
  Wentao He; Tatsuya Ishikawa; Yulong ZHU
  Soils and Foundations, 63, 1, Feb. 2023, [Peer-reviewed], [Corresponding author]
  Scientific journal
• The frost heave characteristics of a coarse-grained volcanic soil quantified by particle image velocimetry
  Junping Ren; Shoulong Zhang; Tatsuya Ishikawa; Shuangyang Li; Chong Wang
  Geoderma, 430, Feb. 2023, [Peer-reviewed]
  Scientific journal
• Evaluation of resilient modulus of asphalt pavement in cold region with Thermo-Hydro-Mechanical coupling simulation
  J. Si; T. Ishikawa
  Smart Geotechnics for Smart Societies, 2537, 2540, 01 Jan. 2023, [Peer-reviewed], [Corresponding author]
  In book
• Effect evaluation of grass roots on mechanical properties of unsaturated coarse-grained soil
  Wentao He; Tatsuya Ishikawa; Binh T. Nguyen
  Transportation Geotechnics, 38, Jan. 2023, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Influence of Frost Heave Induced Track Deformation on Ballast Settlement of Culvert Transition Zone in Freezing Period
  Shoulong Zhang; Tatsuya Ishikawa
  Lecture Notes in Civil Engineering, 288 LNCE, 375, 384, 2023, [Peer-reviewed]
  International conference proceedings
• Thermal-hydro-mechanical coupled analysis of unsaturated frost susceptible soils
  Yu Wei Wu; Tatsuya Ishikawa
  Research in Cold and Arid Regions, 14, 4, 223, 234, Aug. 2022, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Influence of freeze-thaw of ballasted track on vehicle vibration and its evaluation
  Shoulong Zhang; Tatsuya Ishikawa; Bin Luo
  Transportation Engineering, 8, Jun. 2022, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Modeling Wicking Fabric Inhibition Effect on Frost Heave
  Yuwei Wu; Tatsuya Ishikawa; Kimio Maruyama; Chigusa Ueno; Tomohisa Yasuoka; Sho Okuda
  Applied Sciences (Switzerland), 12, 9, 01 May 2022, [Peer-reviewed], [Corresponding author]
  Scientific journal
• New simplified transient method for determining the coefficient of permeability of unsaturated soil
  Binh T. Nguyen; Tatsuya Ishikawa; Yulong Zhu; Srikrishnan Siva Subramanian; Thanh Truong Nguyen
  Engineering Geology, 300, Apr. 2022, [Peer-reviewed]
  Scientific journal
• Evaluation of climate effect on resilient modulus of granular subgrade material
  Tianshu Lin; Tatsuya Ishikawa; Jiaqiang Yang; Tetsuya Tokoro
  Cold Regions Science and Technology, 194, Feb. 2022, [Peer-reviewed], [Corresponding author]
  Scientific journal
• ESTIMATION OF OCCURANCE OF SLOPE DISASTER RISKS ASSOCIATED WITH CLIMATE CHANGE CONSIDERING RAINFALL AND SNOWMELT PROCESSES
  片寄陸; 中津川誠; 石川達也
  土木学会論文集 B1(水工学)(Web), 78, 2, 2022, [Peer-reviewed]
• Influence of suffusion on shear strength of saturated/unsaturated volcanic coarse-grained soils
  小原悠佑; 石川達也; 所哲也
  地盤工学シンポジウム論文集(Web), 63rd, 2022, [Peer-reviewed], [Corresponding author]
• A FEM-MPM hybrid coupled framework based on local shear strength method for simulating rainfall/runoff-induced landslide runout
  Yulong Zhu; Tatsuya Ishikawa; Yafen Zhang; Binh T. Nguyen; Srikrishnan Siva Subramanian
  Landslides, 19, 8, 2021, 2032, 2022, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Coupled Analysis on Frost-Heaving Depression Effect of Geosynthetics Drainage Material for Road Pavement
  Tomohisa Yasuoka; Tatsuya Ishikawa; Bin Luo; Yuwei Wu; Kimio Maruyama; Chigusa Ueno
  Lecture Notes in Civil Engineering, 165, 509, 520, Lecture Notes in Civil Engineering, 2022, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Modification of Japanese Pavement Fatigue Life Criteria by Considering Climatic Effects in Cold Regions
  Tianshu Lin; Tatsuya Ishikawa; Tetsuya Tokoro; Kimio Maruyama; Chigusa Ueno
  Lecture Notes in Civil Engineering, 164, 29, 39, Lecture Notes in Civil Engineering, 2022, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Resilient Deformation Characteristics of Unsaturated Subgrade Materials of Rail Tracks under Cyclic Moving Wheel Loads
  T. Ishikawa; B. Dareeju; C. Gallage; L. Tianshu
  Geotechnical Engineering, 52, 4, 23, 32, Dec. 2021, [Peer-reviewed], [Lead author, Corresponding author]
  Scientific journal
• Probability assessment of slope instability in seasonally cold regions under climate change
  Yulong Zhu; Tatsuya Ishikawa; Tomohito J. Yamada; Srikrishnan Siva Subramanian
  Journal of Infrastructure Preservation and Resilience, 2, 1, Springer Science and Business Media LLC, Dec. 2021, [Peer-reviewed], [Corresponding author]
  Scientific journal, To semi-quantitatively assess the effects of climate change on the slope failures, this paper proposes an effective approach for evaluating the influences of climate change on slope stability in seasonally cold regions. To discuss climate change, this study firstly analyzes the trend of the two main climate factors (precipitation and air temperature) based on the regression analysis results of the meteorological monitoring data during the past 120 years in different scales (e.g., world, country (Japan), and city (Sapporo)), and the downscaled outputs of three different regional atmospheric models (RAMs) with lateral boundary conditions from three different general circulation models (GCMs). Next, to discuss the effects of different climate factors (air temperature, precipitation, etc.) and to determine the key climate factors on the slope instability, a slope stability assessment approach for evaluating the effects of climate changes on slope instability is proposed through the water content simulation and slope stability analysis with considering freeze-thaw action. Finally, to check the effectiveness of the above assessment approach, assessment of instability of an actual highway embankment slope with the local layer geometry is done by applying the past and predicted future climate data. The results indicate that affected by global warming, the air temperature rise in some cold cities is more serious. The climate changes (especially the increase in precipitation) in the future will increase the infiltration during the Spring season. It will lengthen the time that the highway slope is in an unstable state due to high volumetric water content, causing the occurrence of slope failures will be more concentrated in April. While during the Ssummer-Autumn period, the time domain of its occurrence will become wider.
• Effect evaluation of drainage condition and water content on cyclic plastic deformation of aged ballast and its estimation models
  Jiaqiang Yang; Tatsuya Ishikawa; Tetsuya Tokoro; Takahisa Nakamura; Ippei Kijiya; Takashi Okayasu
  Transportation Geotechnics, 30, Sep. 2021, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• The Measurement of Unfrozen Water Content and SFCC of a Coarse-Grained Volcanic Soil
  Junping Ren; Shoulong Zhang; Chong Wang; Tatsuya Ishikawa; Sai K. Vanapalli
  Journal of Testing and Evaluation, 51, 1, 01 Aug. 2021, [Peer-reviewed], ［Internationally co-authored］
  English, Scientific journal
• Reconnaissance report on geotechnical damage caused by 2018 Hokkaido Eastern Iburi earthquake with JMA seismic intensity 7
  Tatsuya Ishikawa; Masayuki Yoshimi; Koichi Isobe; Shoji Yokohama
  Soils and Foundations, 61, 4, 1151, 1171, Aug. 2021, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Pavement design method in Japan with consideration of climate effect and principal stress axis rotation
  Tianshu Lin; Tatsuya Ishikawa; Kimio Maruyama; Tetsuya Tokoro
  Transportation Geotechnics, 28, May 2021, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Influence of aging on hydro-mechanical behavior of unsaturated ballast
  Jiaqiang Yang; Tatsuya Ishikawa; Tianshu Lin; Tetsuya Tokoro; Takahisa Nakamura; Yoshitsugu Momoya
  Transportation Geotechnics, 27, Mar. 2021, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Early warning system for rainfall- and snowmelt-induced slope failure in seasonally cold regions
  Yulong Zhu; Tatsuya Ishikawa; Srikrishnan Siva Subramanian; Bin Luo
  Soils and Foundations, 61, 1, 198, 217, Feb. 2021, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］
  English, Scientific journal
• The Freezing Characteristic Curve of a Coarse-Grained Volcanic Soil
  Junping Ren; Shoulong Zhang; Tatsuya Ishikawa; Sai K. Vanapalli
  Sustainable Civil Infrastructures, 80, 96, Sustainable Civil Infrastructures, 2021, [Peer-reviewed]
  International conference proceedings
• Prediction of Slope Failure in Cold Regions Induced by a Rainfall During Snowmelt Period
  Takumi Murakami; Tatsuya Ishikawa; Nguyen Thanh Binh; Akira Mori; Seiya Yokota
  Lecture Notes in Civil Engineering, 126, 457, 465, Lecture Notes in Civil Engineering, 2021, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Integrated Modeling of Fully Coupled Two-Phase Surface and Subsurface Flow
  Yulong Zhu; Tatsuya Ishikawa; Srikrishnan Siva Subramanian
  Lecture Notes in Civil Engineering, 125, 680, 687, Lecture Notes in Civil Engineering, 2021, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］
  English, International conference proceedings
• Effects evaluation of grass age on hydraulic properties of coarse-grained soil
  Binh T. Nguyen; Tatsuya Ishikawa; Takumi Murakami
  Transportation Geotechnics, 25, Dec. 2020, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Simultaneous analysis of slope instabilities on a small catchment-scale using coupled surface and subsurface flows
  Yulong Zhu; Tatsuya Ishikawa; Srikrishnan Siva Subramanian; Bin Luo
  Engineering Geology, 275, 20 Sep. 2020, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］
  English, Scientific journal
• A Sequentially Coupled Catchment‐Scale Numerical Model for Snowmelt‐Induced Soil Slope Instabilities
  S. Siva Subramanian; X. Fan; A. P. Yunus; T. Asch; G. Scaringi; Q. Xu; L. Dai; T. Ishikawa; R. Huang
  Journal of Geophysical Research: Earth Surface, 125, 5, American Geophysical Union ({AGU}), 15 May 2020, [Peer-reviewed], ［Internationally co-authored］
  English, Scientific journal
• Simulation of runoff and infiltration using iterative cross-coupled surface and subsurface flows
  Yulong Zhu; Tatsuya Ishikawa; Srikrishnan Siva Subramanian
  8th Japan-China Geotechnical Symposium: Challenges to Breakthrough in Geotechnic, 41, 46, 2020, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Effect of snow cover evolution on pore water pressure behaviour in embankments and cut slopes: Field observations
  Satoshi Nishimura; Keisuke Sasahara; Tatsuya Ishikawa
  8th Japan-China Geotechnical Symposium: Challenges to Breakthrough in Geotechnic, 288, 293, 2020, [Peer-reviewed], [Last author]
  English, International conference proceedings
• Influences of water content and fine fraction content on permanent deformation of ballasts
  Jiaqiang Yang; T. Ishikawa; S. Matsutani; T. Tokoro; T. Nakamura; Y. Momoya
  16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019, 2020, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Resilient properties of unbound granular materials subjected to freeze-thaw and wheel loads
  Tianshu Lin; T. Ishikawa; R. Aoki; T. Tokoro
  16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019, 2020, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Measurement for permeability of frozen soil by transient pulse method
  Tetsuya Tokoro; Tatsuya Ishikawa
  Lecture Notes in Civil Engineering, 49, 71, 78, 2020, [Peer-reviewed], [Last author]
  English, In book
• Influences of freeze-thaw on performance of pavement structures in snowy cold region
  Tatsuya Ishikawa
  16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019, 2020, [Peer-reviewed], [Lead author]
  English, International conference proceedings
• Effect evaluation of freeze-thaw on resilient modulus of unsaturated granular base course material in pavement
  Tatsuya Ishikawa; Tianshu Lin; Shinichiro Kawabata; Shuichi Kameyama; Tetsuya Tokoro
  Transportation Geotechnics, 21, Dec. 2019, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Applicability of Modified University of Illinois at Urbana–Champaign Model for Unbound Aggregate Material with Different Water Content
  Tianshu Lin; Tatsuya Ishikawa; Bin Luo
  Transportation Research Record, 2673, 3, 439, 449, 01 Mar. 2019, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Application of the UIUC model for predicting ballast settlement to unsaturated ballasts under moving wheel loads
  Tatsuya Ishikawa; Tianshu Lin; Jiaqiang Yang; Tetsuya Tokoro; Erol Tutumluer
  Transportation Geotechnics, 18, 149, 162, Mar. 2019, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］
  English, Scientific journal
• Unsaturated soil mechanics for disaster prevention and maintenance of traffic infrastructure in snowy cold region
  Tatsuya Ishikawa; Tianshu Lin; Srikrishnan Siva Subramanian; Tetsuya Tokoro
  7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019, 2019, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
  English, International conference proceedings
• Testing method for resilient properties of unsaturated unbound granular materials subjected to freezethaw action
  Tianshu Lin; Tatsuya Ishikawa; Tetsuya Tokoro
  7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019, 576, 581, 2019, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Numerical analysis of in-situ water content and temperature variations due to effects of grass
  Binh T. Nguyen; Tatsuya Ishikawa; Takumi Murakami
  7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019, 660, 668, 2019, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Measurement of unfrozen water in unsaturated soil with pulse NMR
  T. Tokoro; T. Ishikawa
  7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019, 582, 586, 2019, [Peer-reviewed], [Last author]
  English, International conference proceedings
• STUDY ON ELASTO-PLASTIC DEFORMATION OF BALLAST SUBJECTED TO CYCLIC LOADING BY SUBLOADING SURFACE MODEL
  KIJIYA Ippei; ITOH Kazuki; NAKAMURA Takahisa; ISHIKAWA Tatsuya; OKAYASU Takashi
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 75, 2, I_105, I_113, Japan Society of Civil Engineers, 2019, [Peer-reviewed]
  Japanese, Scientific journal,

   Ballasted track has the structure to lay the ballast under the sleeper. The ballast shows the plastic deformation behavior by cyclic train load gradually and we keep soundness of ballast to repair when its plastic deformation gets greater. It seems difficult to predict the deformation behavior of ballast subjected to cyclic train loading because its shape is granular, and then we can not predict the temporal change of deformation and select the weak point, needed to be repaired which has the vertical track regularity inspected by the track inspection.

   In this study, we aim to resolve and reproduce the deformation behavior of ballast subjected to cyclic loading, and considered to use the finite numerical analysis with subloading surface model as unconventional plasticity. We simulated the element test of ballast and the full scale model test of ballasted track on straight roads and considered the validity of the numerical analysis method.

• STUDY ON LATERAL RESISTANCE FORCE OF BALLASTED TRACK EQUIPPED WITH COUNTERMEASURES TO PREVENT TRACK BUCKLING DURING EARTHQUAKES
  NAKAMURA Takahisa; MOMOYA Yoshitsugu; ISHIKAWA Tatsuya; HAYANO Kimitoshi
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 75, 1, 41, 52, Japan Society of Civil Engineers, 2019, [Peer-reviewed]
  Japanese, Scientific journal,

   Development of the seismic design and the seismic countermeasures of the structures supporting railroad ballasted tracks are progressing; development of them for ballasted tracks is also required. In this study, we conducted small-scale model tests to evaluate the mechanism of reduction of the lateral ballast resistance during shaking. The deformation behavior inside the ballast during shaking was photographed and image analysis by PIV was performed; then it was found out that a shear plane was generated in the loading direction from the depth of the bottom of the sleeper. Large shaking table tests were also conducted using a full-scale model to investigate the effect of the seismic countermeasures for ballasted tracks. It was confirmed that both the buckling prevention plates and the ballast retaining wall had high seismic countermeasure effect.

• Applicability Evaluation of Slope Disaster Risk Assessment Method in Snowy Cold Regions
  Tatsuya Ishikawa; Srikrishnan Siva Subramanian; Tetsuya Tokoro
  Lecture Notes in Civil Engineering, 28, 467, 498, 2019, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
  English, In book
• Development of freeze-thaw water retention test apparatus for coarse granular materials
  Tomoyuki Aoyagi; Jiaqiang Yang; Shingo Matsutani; Tatsuya Ishikawa; Takahisa Nakamura; Yoshitsugu Momoya
  Lecture Notes in Civil Engineering, 29, 409, 422, 2019, [Peer-reviewed], [Corresponding author]
  English, In book
• An early warning criterion for the prediction of snowmelt-induced soil slope failures in seasonally cold regions
  Srikrishnan Siva Subramanian; Tatsuya Ishikawa; Tetsuya Tokoro
  Soils and Foundations, 58, 3, 582, 601, Jun. 2018, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Rainfall Infiltration and Runoff Characteristics of an Unsaturated Volcanic Soil under Grass Cover
  Thanh Binh Nguyen; Ishikawa Tatsuya; Siva Subramanian Srikrishnan
  PANAM UNSATURATED SOILS 2017: FUNDAMENTALS, 2017-November, 301, 135, 145, 2018, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• A Finite Element Analysis of Stress Change in Pavement Subjected to Freeze-Thaw
  Bin Luo; Tatsuya Ishikawa; Tetsuya Tokoro
  PROCEEDINGS OF GEOSHANGHAI 2018 INTERNATIONAL CONFERENCE: MULTI-PHYSICS PROCESSES IN SOIL MECHANICS AND ADVANCES IN GEOTECHNICAL TESTING, 315, 324, 2018, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Experimental prediction of permeability of freeze-thawed fine-grained soil
  Go Hirose; Yuzuru Ito; Tatsuya Ishikawa; Satoshi Akagawa
  Journal of Japan Society of Civil Engineers, 6, 1, 156, 166, 2018, [Peer-reviewed]
  English, Scientific journal
• Water diversion in shallow land waste repository constructed using capillary barrier of soil
  Toshihiro Morii; Tatsuya Ishikawa; Kaoru Kobayashi; Yoshinori Hanada; Kenta Muto
  Proceedings of the 7th China-Japan Geotechnical Symposium: New Advances in Geotechnical Engineering, CJGS 2018, 2018-March, 220, 226, 2018, [Peer-reviewed]
  English, International conference proceedings
• Effects of particle size distributions and principal stress axis rotation on cyclic plastic deformation characteristics of coarse materials
  Biyanvilage Dareeju; Chaminda Gallage; Tatsuya Ishikawa; Manika Dhanasekar; Les Dawes
  Journal of GeoEngineering, 13, 4, 161, 170, 2018, [Peer-reviewed], ［Internationally co-authored］
  English, Scientific journal
• Frost heave analysis of ballasted track above box culvert and its influence on train vibration
  Bin Luo; Hao Lai; Tatsuya Ishikawa; Tetsuya Tokoro
  SCIENCES IN COLD AND ARID REGIONS, 9, 3, 229, 235, Jun. 2017, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Effects of principal stress axis rotation on cyclic deformation characteristics of rail track subgrade materials
  Biyanvilage Dareeju; Chaminda Gallage; Tatsuya Ishikawa; Manicka Dhanasekar
  Soils and Foundations, 57, 3, 423, 438, Jun. 2017, [Peer-reviewed], ［Internationally co-authored］
  English, Scientific journal
• Stability assessment approach for soil slopes in seasonal cold regions
  Subramanian Srikrishnan Siva; Ishikawa Tatsuya; Tokoro Tetsuya
  Engineering geology, 221, 221, 154, 169, 20 Apr. 2017, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Numerical analysis of seismic behaviour of soil under frozen surface conditions
  Siva Subramanian Srikrishnan; Ishikawa Tatsuya; Tokoro Tetsuya; Kusunoki Fumiya
  Japanese Geotechnical Society Special Publication, 5, 2, 135, 140, The Japanese Geotechnical Society, 2017, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings,

  In seasonal cold regions like Hokkaido, the soil surface up to a shallow depth is frozen during the winter. An earthquake during the freezing period and thawing period may cause severe disasters i.e. slope failures induced by the combined effects of seismicity and snow melt water. The influences of freezing conditions on the seismic behaviour of soil need to be studied elaborately. In this study, a series of shaking table tests were performed with frozen surface layer and numerical analysis has been performed to simulate the seismic behaviour of soil under the frozen surface state. The numerical analysis has been done based on the series of shaking table tests performed under two different conditions i.e. without a frozen soil surface layer and with 10 cm frozen soil at the surface. Loose density (Dr=30~35 %) and high density (Dr=75~80 %) Toyoura sand have been used to study the liquefaction behaviour. Different liquefaction behaviour is observed when considering surface frozen conditions under both loose and high relative densities of soil. Through the shaking table tests and numerical simulations performed, it is clear that the frozen surface layer severely affects the seismic response of the soil and if these conditions prevail on a soil slope during an earthquake, a sliding slope failure causing the movement of frozen soil layer may occur conceivably.

• A Case Study of a Cut Slope Failure Influenced by Snowmelt and Rainfall
  Akira Mori; Srikrishna Siva Subramanian; Tatsuya Ishikawa; Masahiro Komatsu
  Procedia Engineering, 189, 533, 538, 2017, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Coupled thermo-hydro-mechanical analysis of freeze–thaw behavior of pavement structure over a box culvert
  Bin Luo; Tatsuya Ishikawa; Tetsuya Tokoro; Hao Lai
  Transportation Research Record, 2656, 1, 12, 22, 2017, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• EXPERIMENTAL PREDICTION OF PERMEABILITY OF FREEZE-THAWED FINE-GRAINED SOIL
  廣瀬剛; 伊藤譲; 石川達也; 赤川敏
  土木学会論文集 C(地圏工学)(Web), 73, 2, 131, 140, Japan Society of Civil Engineers, 2017, [Peer-reviewed]
  Japanese, Scientific journal
• Vehicle/track multibody dynamics simulation in consideration of track supporting stiffness for study on the generation and propagation mechanism of rail corrugation
  Hosoda Mitsuru; Tanaka Hirofumi; Ishikawa Tatsuya
  Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 63, 0, 171, 181, Japan Society of Civil Engineers, 2017, [Peer-reviewed], [Last author]
  Japanese, Scientific journal, The rail corrugation on high rail often generates on ballast-less track, however its mechanism has been not known in detail yet. In this paper, first of all, we assumed that the track supporting stiffness under sleeper influenced the generation situation of high rail corrugation based on the results of the various field investigations. Then, we developed vehicle dynamic simulation models by means of multibody dynamics for verifying the influence of the track supporting stiffness. In addition, we simulated on-board measurement for verifying adequacy of analysis method. Finally, we examined influence of the track stiffness on the dynamic interaction between vehicle and track.
• Influence of frozen surface layer on ground behavior during earthquake
  Tetsuya Tokoro; Tatsuya Ishikawa; Srikrishnan Siva Subramanian
  ICSMGE 2017 - 19th International Conference on Soil Mechanics and Geotechnical Engineering, 2017-September, 1597, 1600, 2017, [Peer-reviewed]
  English, International conference proceedings
• General report TC202 transportation geotechnics
  Erol Tutumluer; Tatsuya Ishikawa
  ICSMGE 2017 - 19th International Conference on Soil Mechanics and Geotechnical Engineering, 2017-September, 1325, 1332, 2017, [Invited], [Last author], ［Internationally co-authored］
  English, International conference proceedings
• Climatic effects on the stability of unsaturated soil slope in cold region
  Srikrishnan Siva Subramanian; Tatsuya Ishikawa; Tetsuya Tokoro
  ICSMGE 2017 - 19th International Conference on Soil Mechanics and Geotechnical Engineering, 2017-September, 2203, 2206, 2017, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Influence of parallel grading on hydro-mechanical characteristics of unsaturated fouled ballast
  T. Ishikawa; S. Matsutani; T. Tokoro; T. Nakamura; Y. Momoya
  Bearing Capacity of Roads, Railways and Airfields - Proceedings of the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017, 1817, 1825, 2017, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Estimation methods for thermal conductivity of sandy soil with electrical characteristics
  Tetsuya Tokoro; Tatsuya Ishikawa; Shoya Shirai; Tsutomu Nakamura
  Soils and Foundations, 56, 5, 927, 936, 01 Oct. 2016, [Peer-reviewed]
  English, Scientific journal
• Influence of freeze–thaw action on hydraulic behavior of unsaturated volcanic coarse-grained soils
  Tatsuya Ishikawa; Tetsuya Tokoro; Seiichi Miura
  Soils and Foundations, 56, 5, 790, 804, 01 Oct. 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Cyclic plastic deformation characteristics of subgrade under moving train wheel load
  Dareeju Biyanvilage; Gallage Chaminda; Dhanasekar Manika; Ishikawa Tatsuya
  Japanese Geotechnical Society Special Publication, 2, 46, 1619, 1622, The Japanese Geotechnical Society, 2016, [Peer-reviewed], [Last author], ［Internationally co-authored］
  English, International conference proceedings
• Application of coupled thermo-hydro-mechanical analysis to frost-heave behavior of earth structures
  Ishikawa Tatsuya; Kijiya Ippei; Tokoro Tetsuya; Sato Masaru
  Japanese Geotechnical Society Special Publication, 2, 13, 531, 536, The Japanese Geotechnical Society, 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• 飽和細粒土の凍結融解作用による透水係数変化のメカニズムに関する実験的研究
  廣瀬剛; 伊藤譲; 石川達也; 赤川敏; 所哲也; 大西有三; 上田保司
  地盤改良シンポジウム論文集(CD-ROM), 12th, ROMBUNNO.3‐3, 2016, [Peer-reviewed]
  Japanese, Symposium
• Change in shear behavior of unsaturated volcanic coarse-grained soil due to fine particles run off
  X. Y. Zheng; T. Ishikawa; T. Tokoro
  Unsaturated Soil Mechanics from Theory to Practice - Proceedings of the 6th Asia-Pacific Conference on Unsaturated Soils, 275, 280, 2016, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Effects of Principal Stress Axis Rotation on Unsaturated Rail Track Foundation Deterioration
  Chaminda Gallage; Biyanvilage Dareeju; Manika Dhanasekar; Tatsuya Ishikawa
  Procedia Engineering, 143, 252, 259, 2016, [Peer-reviewed], ［Internationally co-authored］
  English, International conference proceedings
• Effects of principal stress axis rotation on cyclic plastic deformation of unsaturated railway roadbed
  S. Seto; T. Ishikawa; B. Dareeju; C. Gallage; B. Luo
  Civil-Comp Proceedings, 110, 2016, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］
  English, International conference proceedings
• Influence of Freeze-Thaw on the Mechanical Behavior of the Granular Base and Fatigue Life of Pavement Structures in Japan
  Tatsuya Ishikawa; Shinichiro Kawabata
  Geotechnical Special Publication, 2016-January, 262 GSP, 77, 85, 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Influence of Water Content on Shear Behavior of Unsaturated Fouled Ballast
  Tatsuya Ishikawa; Shinji Fuku; Takahisa Nakamura; Yoshitsugu Momoya; Tetsuya Tokoro
  Procedia Engineering, 143, 268, 275, 2016, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effects of Freeze-thaw History on Bearing Capacity of Granular Base Course Materials
  Shinichiro Kawabata; Tatsuya Ishikawa; Shuichi Kameyama
  Procedia Engineering, 143, 828, 835, 2016, [Peer-reviewed]
  English, International conference proceedings
• EFFECT EVALUATION OF FINE FRACTION ON MECHANICAL CHARACTERISTICS OF UNSATURATED RAILROAD BALLAST
  ISHIKAWA Tatsuya; MATSUTANI Shingo; TOKORO Tetsuya; NAKAMURA Takahisa; MOMOYA Yoshitsugu
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 72, 3, I_151, I_158, Japan Society of Civil Engineers, 2016, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal,  This paper evaluates the synergistic effects of water content and fine fraction on shear behavior of unsaturated fouled ballast by performing a series of monotonic loading and repeated loading triaxial compression tests and water retention tests on fresh and fouled ballasts with different water contents. As the results, it was revealed that the soil-water characteristic curves and relationships between degree of saturation and peak shear strength were seriously affected by intrusion of fouling materials into fresh ballast, and that the decreasing trend of peak strength becomes more remarkable in such a case where both water content and fine fraction increase. These indicate that for the precise prediction of the long-term performance of ballasted track and the mechanical behavior of railroad ballast under repeated loads, it is important to take into account the synergistic effects of water content and fine fraction on the deformation-strength characteristics of fouled ballast.
• Influence of moving wheel loads on mechanical behavior of submerged granular roadbed
  Tatsuya Ishikawa; Seiichi Miura
  Soils and Foundations, 55, 2, 242, 257, Apr. 2015, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Geohazard at volcanic soil slope in cold regions and its influencing factors
  Ishikawa Tatsuya; Tokoro Tetsuya; Seiichi Miura
  Japanese Geotechnical Society Special Publication, 1, 1, 1, 20, The Japanese Geotechnical Society, 2015, [Peer-reviewed], [Invited]
  English, International conference proceedings, This study examines the mechanism of the geohazards occurred at a volcanic soil slope in cold regions and its influencing factors in consideration of the effects of freeze-thaw actions on the physical properties, the water retention-permeability characteristics, and the deformation-strength characteristics of volcanic soils from the viewpoint of both experimental study and analytical study. To this end, we performed the long-term field measurement, model tests, laboratory element tests, and numerical simulations by taking volcanic soil slope subjected to freeze-thaw actions. As the results, this study revealed that there is a difference in the slope failure mechanism between cold region and warm-temperate region, and that freeze-thaw actions seriously influence thermo-hydro-mechanical behaviour of crushable volcanic coarse-grained soil slope under unsaturated condition even if the soil is a non-frost-susceptible geomaterial. Furthermore, this study clarified the mechanism, the endogenous factors, and the exogenous factors of the slope failure for volcanic soil ground in Hokkaido in comparison with the slope failure in warm-temperate regions.
• Influence of fine particles run off on shear behavior of volcanic coarse-grained soil
  Zheng Xiaoyi; Ishikawa Tatsuya; Tokoro Tetsuya
  Japanese Geotechnical Society Special Publication, 1, 7, 11, 16, The Japanese Geotechnical Society, 2015, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Numerical simulation of volcanic soil slope failure under coupled freeze-thaw and rainfall infiltration effects
  Siva Subramanian Srikrishnan; Ishikawa Tatsuya; Yokohama Shoji; Tokoro Tetsuya
  Japanese Geotechnical Society Special Publication, 1, 7, 5, 10, The Japanese Geotechnical Society, 2015, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• EVALUATION OF FROST HEAVE-THAW BEHAVIOR OF PAVEMENT WITH COUPLED THERMO-HYDRO-MECHANICAL ANALYSIS
  ISHIKAWA Tatsuya; KIJIYA Ippei; TOKORO Tetsuya
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 71, 3, I_185, I_192, Japan Society of Civil Engineers, 2015, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal,  This paper develops a coupled thermo-hydro-mechanical (THM) FE analysis, which can reproduce frost-heave phenomenon of soils observed in snowy cold regions, and examines the applicability of the proposed coupled THM analysis in terms of the validity of its governing equations and the setting method of input parameters by performing numerical simulations for frost heave tests. In addition, by conducting a series of numerical simulations for pavement structures subjected to freeze-thaw action, the influence of frost heave-thaw on the interaction between soil ground and structures was evaluated. As the result, it was revealed that the frost heave-thaw behavior has a considerable influence on the fatigue life of pavement structure.
• Numerical experiments on freeze-thaw of soils with coupled thermo-hydro-mechanical FE analysis
  T. Ishikawa; I. Kijiya; T. Tokoro; M. Sato
  Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014, 415, 420, 2015, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Particle breakage of volcanic coarse-grained soils due to wet-dry cycles and freeze-thaw actions
  T. Ishikawa; S. Miura; T. Tokoro
  Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014, 2, 1415, 1420, 2015, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• ESTIMATION OF FROST HEAVE RATIO OF SOILS IN CONTEMPLATION OF MATRIC SUCTION UNDER LOW OVERBURDEN PRESSURE
  ISHIKAWA Tatsuya; KIJIYA Ippei; TOKORO Tetsuya; AKAGAWA Satoshi
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 70, 3, I_65, I_70, Japan Society of Civil Engineers, 2015, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal,  This study proposes two kinds of estimation methods for the frost heave ratio of unsaturated frost-susceptible soils under low overburden pressure such as subgrade soils at the pavement structure in cold regions. One is the modified Takashi's equation in contemplation of matric suction of soils under low overburden pressure. The other is the simple frost heave model which evaluates the effects of initial water content, Bishop's effective stress and water absorption during freezing on the frost heave ratio. In addition, the applicability and the usefulness of both methods were discussed based on the results of frost susceptibility tests. As the results, it was revealed that the estimation methods proposed in this study have an excellent applicability to the precise prediction for the frost-heave phenomenon of unsaturated subsurface ground in cold regions.
• Simple plastic deformation analysis of ballasted track under repeated moving-wheel loads by cumulative damage model
  Tatsuya Ishikawa; Seiichi Miura; Etsuo Sekine
  Transportation Geotechnics, 1, 4, 157, 170, Elsevier Ltd, 01 Dec. 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Influences of degree of saturation and strain rate on strength characteristics of unsaturated granular subbase course material
  Yuan Zhang; Tatsuya Ishikawa; Tetsuya Tokoro; Tomoyoshi Nishimura
  Transportation Geotechnics, 1, 2, 74, 89, Elsevier Ltd, Jun. 2014, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Dynamic behaviour of railway ballasted track structures in shaking table tests and seismic resistant performance evaluation in Japan
  T. Ishikawa; S. Miura; E. Sekine
  Geotechnical Engineering, 45, 1, 56, 66, Mar. 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Dependency of cyclic plastic deformation characteristics of unsaturated recycled base course material on principal stress axis rotation
  A. Inam; T. Ishikawa; S. Miura
  Geotechnical Engineering, 45, 1, 74, 84, Mar. 2014, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• Medium-size triaxial apparatus for unsaturated granular subbase course materials
  Tatsuya Ishikawa; Yuan Zhang; Tetsuya Tokoro; Seiichi Miura
  Soils and Foundations, 54, 1, 67, 80, Feb. 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Advanced laboratory element tests for granular base course materials in terms of transportation geotechnics
  石川達也; 桃谷尚嗣
  地盤工学シンポジウム論文集(CD-ROM), 59, 615, 622, 地盤工学会, 2014, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Symposium
• Effect of moisture content on thermal conductivity of soils
  T. Tokoro; S. Shirai; T. Nakamura; T. Ishikawa
  Unsaturated Soils: Research and Applications - Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014, 2, 1709, 1714, 2014, [Peer-reviewed]
  English, International conference proceedings
• Evaluation on air-permeability of unsaturated soils subjected to freeze-thaw action
  T. Ishikawa; T. Tokoro; D. Nakamura; S. Yamashita
  Unsaturated Soils: Research and Applications - Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014, 2, 1189, 1195, 2014, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effect evaluation of freeze-thaw history on bearing capacity of base course materials
  KAWABATA Shinichiro; ISHIKAWA Tatsuya; KAMEYAMA Shuichi
  Japanese Geotechnical Journal, 9, 1, 1, 13, The Japanese Geotechnical Society, 2014, [Peer-reviewed]
  Japanese, Scientific journal, This research examined the effect of freeze-thaw actions on the bearing capacity of base course material C-40 by using our newly developed freeze-thaw CBR test apparatus. It was found that freeze-thaw history caused a decrease in the CBR of C-40 under various water content conditions. This is because the freeze action promotes to drain water absorbed into crushed stones. The increase in water on the surface of soil particles causes the decrease in interparticle friction and the change in soil skeleton structure, which resulted in the deterioration of bearing capacity. It was also found that while the decrease in CBR brought from the decrease of interparticle friction recovers over time, while that brought from the change of soil skeleton structure does not recover.
• Effect evaluation of freeze-Thaw on deformation-strength properties of granular base course material in pavement
  T. Ishikawa; Y. Zhang; S. Kawabata; S. Kameyama; T. Tokoro; T. Ono
  18th International Conference on Soil Mechanics and Geotechnical Engineering: Challenges and Innovations in Geotechnics, ICSMGE 2013, 2, 1287, 1290, 2013, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Influence of various experimental conditions on shear behavior of compacted sandy soil under unsaturated condition
  Yuan Zhang; Tatsuya Ishikawa; Tetsuya Tokoro; Satoru Shibuya
  Springer Series in Geomechanics and Geoengineering, 501, 506, Springer Series in Geomechanics and Geoengineering, 2013, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Influence of freeze-thaw action on hydro-mechanical behavior of unsaturated crushable volcanic soils
  Tatsuya Ishikawa; Tetsuya Tokoro
  Springer Series in Geomechanics and Geoengineering, 3, 143, 148, Springer Series in Geomechanics and Geoengineering, 2013, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effects of freeze-thaw history on deformation-strength properties and permeability of fine-grained soil
  T. Kawaguchi; D. Nakamura; S. Yamashita; S. Yamasaki; T. Ishikawa
  18th International Conference on Soil Mechanics and Geotechnical Engineering: Challenges and Innovations in Geotechnics, ICSMGE 2013, 1, 357, 360, 2013, [Peer-reviewed]
  English, International conference proceedings
• EFFECT EVALUATION OF FREEZE-THAW ON RESILIENT MODULUS OF UNSATURATED GRANULAR BASE COURSE MATERIAL
  ISHIKAWA Tatsuya; ZHANG Yuan; KAWABATA Shinichiro; KAMEYAMA Shuichi; TOKORO Tetsuya
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 69, 3, I_207, I_214, Japan Society of Civil Engineers, 2013, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal,  This paper examines the effects of freeze-thaw and water content on the resilient deformation characteristics of subbase course materials to evaluate the mechanical behavior of granular base in cold regions. A series of resilient modulus tests on subbase course materials under various water contents were conducted using a newly developed test apparatus. Besides, the test results were compared with the results of freeze-thaw CBR tests and the long-term field measurement at a model pavement structure including FWD tests. As the results, it was revealed that the resilient deformation characteristics of unbound granular base course materials deteriorate due to freeze-thaw and increment of the water content in thawing season. This indicates that the freeze-thaw of granular base has a strong influence on the fatigue life of pavement structures.
• INFLUENCE OF FREEZING CONDITION AND SPECIMEN SIZE ON EVALUATION OF FROST-SUSCEPTIBILITY
  KAWABATA Shinichiro; ISHIKAWA Tatsuya; TOYOTA Kunio; YAMAUCHI Satoru; KAMEYAMA Shuichi
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 69, 3, I_191, I_198, Japan Society of Civil Engineers, 2013, [Peer-reviewed]
  Japanese, Scientific journal,  The freezing condition of the NEXCO standard frost heave test (NEXCO method) was improved with the objective of reducing the variation in the results. Also, a large diameter testing apparatus was produced with a diameter up to Φ150 mm to enable the JGS standard frost heave test (JGS method) to be applied to subgrade soil and base course material, and the effect of the difference in the test method and the specimen size on the frost heave test results was investigated. Stable results could be obtained by changing the freezing condition of the NEXCO method from an air cooled type to a refrigerant circulation type. No difference was seen between the results of the Φ150-JGS method and the Φ100-JGS method, which indicates that the effect of the increase in diameter is small.
• Influence of moisture content, loading speed and degree of compaction on the shear behavior of sandy soil
  Zhang, Y; Ishikawa, T; Tokoro, T; Shibuya S
  Proceedings of the 2nd International Symposium on Constitutive Modeling of Geomaterials - Advances and New Applications -, 501, 506, Oct. 2012, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Effect of principal stress axis rotation on cyclic plastic deformation characteristics of unsaturated base course material
  Aasim Inam; Tatsuya Ishikawa; Seiichi Miura
  Soils and Foundations, 52, 3, 465, 480, Jun. 2012, [Peer-reviewed], [Corresponding author]
  English, Scientific journal
• EFFECTS OF FREEZE-THAWING ON BEARING CAPACITY OF GRANULAR BASE COURSE MATERIAL
  KAWABATA Shinichiro; ISHIKAWA Tatsuya; MURAYAMA Takumi; KAMEYAMA Shuichi
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 68, 3, I_115, I_122, Japan Society of Civil Engineers, 2012, [Peer-reviewed]
  Japanese, Scientific journal,  In this research we used our newly made freeze-thaw CBR test apparatus to examine the effect of freeze-thaw action on the bearing capacity of base course material C-40. It was found that freeze-thaw history caused a decrease in the CBR in all water content conditions. Because the freeze action promotes to drain of particle pore water, it caused the decrease in interparticle friction and the change in void structure, which resulted in the deterioration of CBR. It was also found that while the CBR deterioration brought from the decrease of interparticle friction recovers over time, which brought from the change of void structure does not recover.
• APPLICATION OF TRIAXIAL APPARATUS FOR UNSATURATED SOILS TO MECHANICAL BEHAVIOR OF GRANULAR BASE COURSE MATERIAL
  ISHIKAWA Tatsuya; ZHANG Yuan; TOKORO Tetsuya
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 68, 3, I_105, I_113, Japan Society of Civil Engineers, 2012, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal,  This paper proposes a testing method for evaluating the effect of water content on the deformation-strength characteristics of unsaturated base course materials. A medium-size triaxial apparatus for unsaturated soils was newly developed in order to examine the mechanical behavior of unsaturated base course materials subjected to fluctuation in water content and to shorten the testing time. Results show that the proposed testing method carried out on this apparatus conform well to the results of previous researches. This indicates that the medium-size triaxial apparatus is highly useful at triaxial compression tests and water retention tests of unsaturated granular base course materials and in shorten the total testing time.
• Coupled thermo-hydro-mechanical analysis for soil behavior subjected to one-dimensional freeze-thaw
  石川達也; 木次谷一平; 所哲也
  地盤工学シンポジウム論文集, 57th, 159‐166, 2012, [Peer-reviewed]
  Japanese, Symposium
• Effects of freeze-thawing on mechanical behavior of granular base in cold regions
  T. Ishikawa; S. Kawabata; S. Kameyama; R. Abe; T. Ono
  ADVANCES IN TRANSPORTATION GEOTECHNICS II, 118, 124, 2012, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Development of medium-size triaxial apparatus for unsaturated granular base course materials
  T. Ishikawa; Y. Zhang; H. Segawa; S. Miura; T. Tokoro
  ADVANCES IN TRANSPORTATION GEOTECHNICS II, 534, 540, 2012, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Influence of moisture content on cyclic plastic deformation characteristics of recycled crusher-run material under moving wheel loads
  A. Inam; T. Ishikawa; S. Miura
  ADVANCES IN TRANSPORTATION GEOTECHNICS II, 213, 218, 2012, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Effect of moisture content on cyclic deformation characteristics of granular material under moving wheel loads
  A. Inam; T. Ishikawa; S. Miura
  5th Asia-Pacific Conference on Unsaturated Soils 2012, 2, 611, 616, Nov. 2011, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Influence of freeze-thaw action on deformation-strength characteristics and particle crushability of volcanic coarse-grained soils
  Tatsuya Ishikawa; Seiichi Miura
  Soils and Foundations, 51, 5, 785, 799, Oct. 2011, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• Dependency of shear behavior of recycled crusher-run material on moisture content evaluation by multi-ring shear testing
  Inam, A; Ishikawa, T; Miura, S
  Proceedings of the 2nd Japan-Korea Joint Workshop on Unsaturated Soils and Ground, 189, 198, Sep. 2011, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Cyclic deformation of granular material subjected to moving-wheel loads
  Tatsuya Ishikawa; Etsuo Sekine; Seiichi Miura
  Canadian Geotechnical Journal, 48, 5, 691, 703, May 2011, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• EFFECTS OF FREEZE-THAWING OF GRANULAR BASE ON FATIGUE LIFE OF PAVEMNET AND ITS EVALUATION
  石川達也; 川端伸一郎; 亀山修一; 安倍隆二; 小野丘
  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), 67, 3, I_109, I_116, Japan Society of Civil Engineers, 2011, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal,  This paper examines the effects of freezing and thawing on the mechanical behavior of granular base under unsaturated condition through the long-term field measurement of ground temperature, water content and deformation inside pavement, by performing FWD tests before and after freeze-thawing and by developing a new CBR test of freeze-thawed base course materials. We also evaluate the influences of the change in the stiffness of granular base due to freeze-thawing on the fatigue breaking of pavements in cold regions by applying the theoretical design method for asphalt pavement in consideration of the effects found in this paper. As the result, it was revealed that the freeze-thawing of granular base has a strong influence on the fatigue life of pavement structure in cold regions because it varies the deformation-strength characteristics of base course materials.
• Influence of freeze-thaw action on mechanical behavior of unsaturated crushable volcanic soil
  T. Ishikawa; S. Miura; K. Itou
  Unsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils, 1, 549, 554, 2011, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• 粒状路盤の力学挙動に及ぼす凍結融解作用の影響評価
  石川 達也; 安倍 隆二; 吉田 有喜; 三浦 清一
  土木学会舗装工学論文集, 15, 201, 209, Dec. 2010, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Application of 3D-DEM with seepage analysis to numerical simulation of rainfall-induced slope failure
  Alexander Camarena Capriles; Tatsuya Ishikawa; Seiichi Miura
  Geomechanics and Geotechnics: From Micro to Macro - Proceedings of the International Symposium on Geomechanics and Geotechnics: From Micro to Macro, IS-Shanghai 2010, 1, 689, 693, Oct. 2010, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Effect of freeze-thaw action on strength characteristics of unsaturated coarse-grained soil
  Ishikawa, T; Ito, K; Miura, S
  Proceedings of 5th International Conference on Unsaturated Soils (UNSAT10), 549, 554, Sep. 2010, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Testing methods for hydro-mechanical characteristics of unsaturated soils subjected to one-dimensional freeze-thaw action
  Tatsuya Ishikawa; Tetsuya Tokoro; Kohei Ito; Seiichi Miura
  Soils and Foundations, 50, 3, 431, 440, Jun. 2010, [Peer-reviewed], [Lead author, Corresponding author]
  English, Scientific journal
• RAINFALL-INDUCED FAILURE OF UNSATURATED VOLCANIC SLOPE SUBJECTED TO FREEZE-THAW ACTION AND ITS MECHANISM
  KAWAMURA Shima; MIURA Seiichi; ISHIKAWA Tatsuya; YOKOHAMA Shoji
  Doboku Gakkai Ronbunshuu C, 66, 3, 577, 594, Japan Society of Civil Engineers, 2010, [Peer-reviewed]
  Japanese, Scientific journal,   Collapse of slope formed from volcanic soils has been frequently caused in Hokkaido, Japan. This study aims at clarifying failure mechanism of volcanic slope caused by both rainfall and freeze-thaw action. In particular, the effects of freeze-thaw action, slope angle, density and friction of impermeable layer in the slope on mechanical behavior were detailedly investigated on volcanic slopes having several shapes. The results showed that; surface slope failure depends strongly on slope angle, the friction characteristics of impermeable layer and rainfall intensity, and the formation of frozen layer in spring season and the softening of slope by freeze-thaw action in summer season are important for evaluating the stability of volcanic slope.
• 累積損傷度理論による有道床軌道の耐震性能評価法
  石川達也; 関根悦夫
  応用力学論文集(CD-ROM), 13, 1031, 1039, 2010, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• A method for permeability measurement of frozen soil using an ice lens inhibition technique
  TOKORO Tetsuya; ISHIKAWA Tatsuya; AKAGAWA Satoshi
  Japanese Geotechnical Journal, 5, 4, 603, 613, The Japanese Geotechnical Society, 2010, [Peer-reviewed], [Corresponding author]
  Japanese, Scientific journal, A method for measuring the permeability coefficient of frozen soils in which generalized Clausius-Clapeyron equation is applicable has been proposed. In this method, in order to acquire continuous water flow, soil’s ice segregation phenomena have been prevented by applying axial stress. The top and bottom of the specimen were kept at normal temperature and the center of the specimen was controlled at minus temperature. Flow rate have been measured by applying differential head and the permeability coefficients were calculated by water flow in steady state. In this study, a test apparatus was newly developed using this measurement method and permeability coefficients at various temperatures were measured. As a result, the permeability coefficient of frozen soil has been shown to have a temperature dependency and the coefficient decreased rapidly around 0 °C.
• Failure mechanism of unsaturated volcanic slopes due to rainfall and freeze-thaw actions
  S. Kawamura; S. Miura; T. Ishikawa
  Geotechnical Special Publication, 202 GSP, 152, 158, 2010, [Peer-reviewed]
  English, International conference proceedings
• 移動輪荷重作用下の粒状路盤の力学挙動に及ぼす含水状態の影響評価
  石川 達也; 細田 充; 三浦 清一; 関根 悦夫
  土木学会舗装工学論文集, 14, 9, 17, Dec. 2009, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Development of triaxial apparatus for permeability test of unsaturated soil using pressure membrane method
  Tetsuya Tokoro; Tatsuya Ishikawa; Seiichi Miura
  Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils, 179, 184, Nov. 2009, [Peer-reviewed], [Corresponding author]
  English, International conference proceedings
• Influence of freeze-thaw action on soil water characteristics of crushable volcanic coarse-grained soil
  T. Ishikawa; K. Ito; S. Miura
  Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils, 159, 164, Nov. 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effect evaluation of freeze-thaw action on hydro-mechanical behavior of unsaturated granular materials
  T. Ishikawa; S. Miura; T. Tokoro
  Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering, 1, 833, 836, Oct. 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Application of coupled thermo-mechanical analysis to slope behavior during freezing and thawing in cold regions
  Ishikawa, T; Sato, M; Miura; S. Akagawa, S; Kawamura, S
  Proceedings of IS Kyoto09, 409, 415, May 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Plastic Deformation Analysis of Coarse Granular Materials under Cyclic Moving Wheel Loads by Cumulative Damage Model
  Tatsuya Ishikawa; Etsuo Sekine; Seiichi Miura
  CJWPT 2009: PROCEEDINGS OF THE 5TH CHINA-JAPAN WORKSHOP ON PAVEMENT TECHNOLOGIES, 113, +, 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Evaluation of roadbed stiffness on bearing capacity of railroad ballast with discontinuous analysis
  T. Ishikawa; T. Kamei; E. Sekine; Y. Ohnishi
  BEARING CAPACITY OF ROADS, RAILWAYS AND AIRFIELDS, VOLS 1 AND 2, 2, 1207, +, 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Failure mechanism of volcanic slope due to rainfall and freeze-thaw action
  S. Kawamura; S. Miura; T. Ishikawa; H. Ino
  PREDICTION AND SIMULATION METHODS FOR GEOHAZARD MITIGATION, 25, +, 2009, [Peer-reviewed]
  English, International conference proceedings
• Coupled thermo-mechanical analysis for slope behavior during freezing and thawing
  T. Ishikawa; S. Miura; S. Akagawa; M. Sato; S. Kawamura
  Prediction and Simulation Methods for Geohazard Mitigation, 409, 416, 01 Jan. 2009, [Peer-reviewed], [Lead author, Corresponding author]
  English, In book
• Application of DDA to mechanical behavior of granular base-subgrade system
  Ishikawa, T; Sekine, E; Ohnishi, Y
  Proceedings of International Mini-Symposium for Numereical Discontinuous Analysis, 41, 52, Nov. 2008, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Numerical modeling for mechanical behavior of granular materials subjected to freeze-thaw action with DEM
  T. Ishikawa; S. Miura
  12th International Conference on Computer Methods and Advances in Geomechanics 2008, 1, 1219, 1226, Oct. 2008, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Influence of water content on mechanical behaviour of gravel under moving wheel loads
  T. Ishikawa; M. Hosoda; S. Miura; E. Sekine
  Advances in Transportation Geotechnics - Proceedings of the 1st International Conference on Transportation Geotechnics, 185, 191, Aug. 2008, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• EFFECTS EVALUATION OF SUBGRADE STIFFNESS ON BEARING CAPACITY OF GRANULAR ROADBED WITH DDA
  ISHIKAWA Tatsuya; KAMEI Takehiko; SEKINE Etsuo; OHNISHI Yuzo
  JOURNAL OF PAVEMENT ENGINEERING, JSCE, 13, 13, 125, 132, Japan Society of Civil Engineers, 2008, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, The paper proposes a new analytical procedure with discontinuous analysis to estimate the bearing capacity of granular roadbed used in ballasted track or road pavement. To examine the applicability, a series of numerical simulations bearing capacity tests for 1/5 scale model of real ballasted track were performed with DDA that regards a particle of crushed stone as an irregular polygon. Based on the comparison of analytical results with experimental results, the effect of subgrade stiffness on the bearing capacity of granular roadbed was examined. As the result, it is revealed that the subgrade stiffness has a great influence on the bearing capacity of granular roadbed, and that discontinuous analysis is an effective method to simulate the mechanical behavior of granular roadbed if the subgrade which behaves as a continuum can be approximated with discontinuous modeling well.
• INFLUENCE OF FREEZE-THAW ACTION ON MECHANICAL BEHAVIOR OF CRUSHABLE VOLCANIC COARSE-GRAINED SOILS
  ISHIKAWA Tatsuya; OZAKI Yuta; MIURA Seiichi
  Doboku Gakkai Ronbunshuu C, 64, 3, 712, 717, Japan Society of Civil Engineers, 2008, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, The objective of this study is to evaluate the effect of freeze-thaw sequence on the mechanical behavior of crushable volcanic coarse-grained soils. A new test apparatus, which can simulate freeze-thaw sequence in real foundations, was developed and a series of triaxial compression tests and water retention tests were performed. Test results showed that the freeze-thaw sequence made the amount of particle breakage increase, and as the result its strength decreases and water retention capacity increases by being exposed to freeze-thaw action. This indicates that the freeze-thaw action has strong influences on the mechanical behavior of crushable volcanic soils even if the soil lacks in frost heave characteristics.
• 寒冷地斜面の凍結融解現象を対象とした連成解析方法の検討
  石川達也; 里優; 三浦清一; 赤川敏; 川村志麻
  岩の力学国内シンポジウム講演論文集, 12th(CD-ROM), ROMBUNNO.98, 36, 2008, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Influence of freeze-thaw action on mechanical behavior of saturated crushable volcanic soil
  T. Ishikawa; S. Miura; K. Ito; Y. Ozaki
  DEFORMATION CHARACTERISTICS OF GEOMATERIALS, VOLS 1 AND 2, 2, 557, +, 2008, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effect evaluation of moving load on cyclic deformation of crushed stone
  Ishikawa, T; Sekine, E
  Proceedings of the 13th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, 1, 435, 438, Dec. 2007, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Fundamental study for slope failure of volcanic soil ground by DDA
  Ishikawa, T; Kawamura, S; Miura, S; Ohnishi, Y
  Proceedings of 8th International Conference on the Analysis of Discontinuous Deformation, 61, 66, Aug. 2007, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effect of moving wheel load on cyclic deformation of granular material
  Ishikawa, T; Sekine, E; Miura, S
  Proceedings of the 4th JAPAN/CHINA Workshop on Pavement Technologies, 41, 50, Jul. 2007, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Influence of degree of saturation on strength characteristics of crushable volcanic coarse-grained soils
  Ishikawa, T; Ozaki, Y; Miura, S
  Proceedings of the 3rd Asian Conference on Unsaturated Soils, 223, 229, Apr. 2007, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• PLASTIC DEFORMATION ANALYSIS OF COARSE GRANULAR MATERIAL UNDER CYCLIC MOVING WHEEL LOADS BY CUMULATIVE DAMAGE MODEL
  SEKINE Etsuo; ISHIKAWA Tatsuya; MIURA Seiichi
  JOURNAL OF PAVEMENT ENGINEERING, JSCE, 12, 12, 47, 55, Japan Society of Civil Engineers, 2007, [Peer-reviewed]
  English, Scientific journal, This paper presents a simple method to estimate cyclic plastic deformation of ballasted track subjected to repeated train pas-sages in terms of the strength and deformation characteristics of coarse granular materials. A new analytical procedure with linear elastic FE analysis considering the cumulative strain derived from multi-ring shear test results of poorly-graded crushed stone, namely ballast, was proposed, and it was revealed that the analytical procedure could roughly estimate the residual settlement of railroad ballast under cyclic moving wheel loads, by comparing test results of small scale model tests of ballasted track with the analytical results.
• SEISMIC PERFORMANCE ASSESSMENT OF RAILWAY BALLASTED TRACK STRUCTURES WITH SHAKING TABLE TESTS
  ISHIKAWA Tatsuya; SEKINE Etsuo; IZUMI Go
  Doboku Gakkai Ronbunshuu F, 63, 4, 517, 529, Japan Society of Civil Engineers, 2007, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, This study presents an experimental study to elucidate the dynamic response of railway track structures subjected to horizontal seismic loads. A series of shaking table tests for one-third scale models of ballast track and grouted ballast track was performed. Based on test results, the seismic stability and ductility beyond failure of railroad ballast were quantitatively evaluated associated with the observed movement of ballast particles inside railroad ballast. As the results, an evaluation method of seismic performance of railway track was proposed correspondent to magnitude of earthquake motions, and it was revealed that the difference in track structure had a serious influence on the seismic performance of railway track.
• EFFECTS OF SCALE FACTOR ON DYNAMIC BEHAVIOR OF RAILROAD BALLAST IN SHAKING TABLE TESTS
  ISHIKAWA Tatsuya; SEKINE Etsuo
  Doboku Gakkai Ronbunshuu F, 63, 4, 506, 516, Japan Society of Civil Engineers, 2007, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, This study presents an experimental study to elucidate the dynamic response of railroad ballast subjected to seismic loads. A series of shaking table tests for ballast and gravel was performed. In these tests, a one-third scale model of railroad ballast as well as a full scale model was used. Based on test results, the seismic stability and ductility beyond failure of railroad ballast are quantitatively evaluated. Moreover, effects of the scale factor between prototypes and the models on the dynamic response of granular materials are discussed. This study proposes an evaluation method of seismic performance of railroad ballast by small scale model tests.
• Development and Performance Evaluation of Multi-ring Shear Apparatus
  T. Ishikawa; S. Miura; E. Sekine
  Design and Construction of Pavements and Rail Tracks: Geotechnical Aspects and Processed Materials, 53, 64, 01 Jan. 2007
  In book
• Effect evaluation of particle modeling on mechanical behavior of railroad ballast in discontinuous analysis
  Ishikawa Tatsuya; Sekine Etsuo; Miwa Masashi; Ohnishi Yuzo
  Journal of applied mechanics, 10, 10, 513, 522, Japan Society of Civil Engineers, 2007, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, This paper examines the effects of particle properties such as particle shape and grain size distribution of particle assemblage on the bearing capacity of railroad ballast in numerical simulations with discontinuous analysis. Here, two evaluation indexes of particle shape, namely “angularity” and “sphericity”, were employed. To evaluate the effect quantitatively, a series of numerical simulations that regard a ballast particle as a regular or an irregular polygon were performed. As the result, it can be observed that the particle shape of numerical models, especially the angularity has a greater effect on the bearing capacity of railroad ballast than the grain size distribution, and that the imitation of the shape of real ballast particles makes numerical results similar to experimental results.
• Numerical modeling for mechanical behavior of granular materials subjected to freeze-thaw action with DEM
  Ishikawa Tatsuya; Tamaki Kazumi; Miura Seiichi
  Journal of applied mechanics, 9, 9, 641, 648, Japan Society of Civil Engineers, Sep. 2006, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• EFFECT EVALUATION OF MOVING WHEEL LOAD ON CYCLIC DEFORMATION OF GRANULAR MATERIAL
  ISHIKAWA Tatsuya; SEKINE Etsuo; MIURA Seiichi
  JOURNAL OF PAVEMENT ENGINEERING, JSCE, 11, 11, 23, 31, Japan Society of Civil Engineers, 2006, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, The objective of this paper is to propose a new testing method to examine the effects of moving wheel load on cyclic plastic deformation of railroad ballast in terms of the strength and deformation characteristics. Applicability of a newly developed multi-ring shear test, which can make the principal stress axes rotate, to an element test of granular materials subjected to moving wheel load was examined by comparing the laboratory element test results with the moving wheel loading test results of small scale model track. As the results, it was revealed that the mechanical behavior of railroad ballast under moving wheel loads is very similar to that of granular material subjected to the principal stress axis rotation during shear. Accordingly, it was confirmed that the multi-ring shear test is appropriate for simulating the actual stress states inside substructures under moving wheel loads.
• Strength characteristics of crushable volcanic soils at various degrees of saturation
  T. Ishikawa; S. Miura; S. Yokohama; R. G. Mijares
  Geomechanics and Geotechnics of Particulate Media, 121, 126, 2006, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Effect evaluation of particle shape on mechanical behavior of railroad ballast with discontinuous analysis
  T. Ishikawa; K. Kobayashi; E. Sekine; Y. Ohnishi
  Geomechanics and Geotechnics of Particulate Media, 389, 395, 2006, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Influence of input parameters on energy loss in free fall tests with DDA
  Ishikawa, T; Miura, S; Ohnishi, Y
  Proceedings of 7th International Conference on the Analysis of Discontinuous Deformation, 147, 158, Dec. 2005, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Development and performance evaluation of multi-ring shear apparatus
  Ishikawa, T; Miura, S; Sekine, E
  Proceedings of Geotechnical Aspects and Processed Material in Design and Construction of Pavement and Rail Track, 53, 64, Sep. 2005, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Evaluation of the effect of particle shape on the bearing capacity of railroad ballast with discontinuous analysis
  ISHIKAWA T.
  Proc. of the 7th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Trondheim, 2005, 1/1(CD-ROM)52, Jun. 2005, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Numerical Simulation of Shear Tests for Granular Materials with 3D DEM
  Ishikawa, T; Tamaki, K; Miura, S
  Proceedings of the 11th International Conference on Computer Methods and Advances in Geomechanics, 2, 65, 72, Jun. 2005, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• PLASTIC DEFORMATION ANALYSIS OF COARSE GRANULAR MATERIAL UNDER CYCLIC LOADING BY CUMULATIVE DAMAGE MODEL
  SEKINE Etsuo; ISHIKAWA Tatsuya
  JOURNAL OF PAVEMENT ENGINEERING, JSCE, 10, 10, 53, 60, Japan Society of Civil Engineers, 2005, [Peer-reviewed]
  This paper presents a simple method to estimate cyclic plastic deformation of ballasted track subjected to repeated train passages in terms of the strength and deformation characteristics of coarse granular materials. A new analytical procedure with linear elastic FEM analysis considering the cumulative strain derived from element test results of ballast was proposed, and it was revealed that the analytical procedure could roughly estimate the residual settlement of railroad ballast, which is an assemblage of poorly-graded crushed stone, by simulating small scale model tests of ballasted track.
• Numerical simulation of shear tests with DDA considering change of pore pressure in granular materials
  T Ishikawa; K Tamaki; Y Ohnishi; S Miki
  Contribution of Rock Mechanics to the New Century, Vols 1 and 2, 1227, 1232, 2004, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• An estimation method of residual settlement in ballasted track under repeated moving loads
  T Ishikawa; E Sekine; A Khono; S Miura
  CYCLIC BEHAVIOUR OF SOILS AND LIQUEFACTION PHENOMENA, 633, 640, 2004, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Modeling for Energy Dissipation in Free Fall Tests of Spherical Stone with Discontinuous Analysis
  Ishikawa, T; Ohnishi, Y; Jian Hong Wu; Nishiyama, S
  Proceedings of SRA03, 1105, 1110, Jun. 2003, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Dynamic behavior of railroad ballast in shaking table tests
  T Ishikawa; E Sekine
  DEFORMATION CHARACTERISTICS OF GEOMATERIALS, 841, 848, 2003, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Shaking table tests of coarse granular materials with discontinuous analysis
  Ishikawa, T; Ohnishi, Y; Sekine, E
  Proceedings of 5th International Conference on the Analysis of Discontinuous Deformation, 181, 188, Oct. 2002, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• 「MTT作業計画支援システム」の試行について
  奥村 陽一; 沼倉 明夫; 小野 重亮; 蔭山 朝昭; 石川 達也; 三和 雅史; 藤森 寿雄; 森 忠夫; 都築 達彦
  土木学会鉄道力学論文集, 6, 55, 59, Jul. 2002, [Peer-reviewed]
  Japanese, Scientific journal
• 横圧載荷による木まくらぎ状態判定試験
  小林 潤; 石川 達也; 小野 重亮; 峰岸 大介
  土木学会鉄道力学論文集, 6, 49, 54, Jul. 2002, [Peer-reviewed]
  Japanese, Scientific journal
• Effects of Moving Wheel Load on Cyclic Deformation of Railroad Ballast
  Ishikawa, T; Sekine, E
  Proceedings of Railway Engineering-2002, Jul. 2002, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Modeling the optimal MTT operation schedule and its application to Japanese railway network system
  MIWA M.
  Railway Engineering 2002, London, Jul. 2002, [Peer-reviewed]
  English, International conference proceedings
• Modeling the optimal decision-making multiple tie tamper operations
  MIWA M.
  WCRR2001, Koeln, Nov. 2001, [Peer-reviewed]
  English, International conference proceedings
• MODELING THE TRANSITION PROCESS OF RAILWAY TRACK IRREGULARITY AND ALL INTEGER MATHEMATICAL PROGRAMMING MODEL ANALYSES FOR MAKING OPTIMAL TRACK MAINTENANCE SCHEDULE
  MIWA Masashi; ISHIKAWA Tatsuya; OYAMA Tatsuo
  Doboku Gakkai Ronbunshu, 681, 681, 51, 65, Japan Society of Civil Engineers, 20 Jul. 2001, [Peer-reviewed]
  Japanese, Scientific journal, In this paper we investigate the transition process of surface irregularity to determine maintenance strategies effectively. From the statistical data analysis, we develop a degradation model and restoration model. Next, in order to obtain an optimal maintenance policy based upon both maintenance costs and level of irregularity for riding quality and safety we propose an all integer mathematical programming model for making optimal multiple tie tamper (MTT) operation scheduling. This scheduling model allows us to decide when a MTT should be allocated to each depot, and which lot should be executed maintenance with the MTT.
• A Study on the Time Dependency of Granular Materials with DDA
  Ishikawa, T; Ohnishi, Y
  Proceedings of 4th International Conference on the Analysis of Discontinuous Deformation, 271, 280, Jun. 2001, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Application of discontinuum analysis to cyclic plastic deformation of coarse granular materials
  Ishikawa, T; Ohnishi, Y
  Proceedings of the 10th International Conference on Computer Methods and Advances in Geomechanics, 321, 324, Jan. 2001, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Application of discontinuum analysis to track deterioration in ballasted track
  Ishikawa, T; Ohnishi, Y; Namura, A
  Proceedings of Railway Engineering-2000, Jul. 2000, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Modeling the transition process of railway track irregularity and its application to the optimal decision-making for multiple tie tamper operations
  MIWA M.
  Railway Engineering 2000, London, Jul. 2000, [Peer-reviewed]
  English, International conference proceedings
• APPLICATION OF DDA TO CYCLIC DEFORMATION OF RAILROAD BALLAST IN FULL-SCALE TESTS
  ISHIKAWA Tatsuya; OHNISHI Yuzo; HORIIKE Takahiro
  Doboku Gakkai Ronbunshu, 2000, 645, 15, 28, Japan Society of Civil Engineers, 2000, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, In order to understand the deformation of “railroad ballast”, which is a component of the ballasted track composed of crushed stone, the simulations of full-scale track tests regarding its part as an assemblage of coarse granular materials were performed in this paper. And the applicability of discontinuum analysis to the cyclic plastic deformation of railroad ballast was discussed in comparing analytical results with DDA (Discontinuous Deformation Analysis) and experimental results. As a result, some new guidelines for the application method of DDA were indicated, and the cyclic plastic deformation of railroad ballast was proved the fabric transformation of particle alignment accompanied by sliding between particles in terms of the mechanics of granular materials.
• Modeling the transition process of railway track irregularity and its application to the decision making for maintenance strategy
  MIWA M.
  WCRR'99, Tokyo, Oct. 1999, [Peer-reviewed]
  English, International conference proceedings
• 鉄道構造物等設計標準［有道床軌道］に準じた構造解析手法に関する一考察
  石川 達也; 内田 雅夫
  土木学会鉄道力学論文集, 3, 31, 36, Jun. 1999, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal
• Experimental and analytical studies on the cyclic deformation characteristics of railroad ballast
  T Ishikawa; M Kamon; A Namura
  PRE-FAILURE DEFORMATION CHARACTERISTICS OF GEOMATERIALS, VOL 1, 783, 791, 1999, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• Analysis of cyclic plastic deformation of railroad ballast by DDA
  T Ishikawa; Y Ohnishi
  ICADD-3: THIRD INTERNATIONAL CONFERENCE ON ANALYSIS OF DISCONTINUOUS DEFORMATION - FROM THEORY TO PRACTICE, PROCEEDINGS, 107, 116, 1999, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• APPLICATION OF DDA TO CYCLIC DEFORMATION OF RAILROAD BALLAST IN TRIAXIAL TESTS
  Ishikawa Tatsuya; Ohnishi Yuzo
  Doboku Gakkai Ronbunshu, 1998, 589, 205, 217, Japan Society of Civil Engineers, 1998, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, In this paper, as the basic study to analyze the deformation of “ballast”, a track component of ballasted track which is composed of crushed stone, regarding its part as an assemblage of coarse granular materials, the application method of discrete analysis treating the problem including discontinuous boundaries to cyclic deformation of coarse granular materials was discussed by simulating triaxial tests of railroad ballast with DDA (Discontinuous Deformation Analysis). As a result, it was revealed that some new guidelines for the application method of DDA were indicated, and also quasi-static performance of railroad ballast is discussed in terms of fabric transformation of particle alignment.
• DDA applied to deformation analysis of coarse granular materials (ballast)
  Ishikawa, T; Ohnishi, Y; Namura, A
  Proceedings of 2nd International Conference on the Analysis of Discontinuous Deformation, 253, 262, Jul. 1997, [Peer-reviewed], [Lead author, Corresponding author]
  English, International conference proceedings
• CYCLIC DEFORMATION CHARACTERISTICS OF RAILROAD BALLAST IN TRIAXIAL TESTS
  Ishikawa Tatsuya; Sunaga Makoto; Dong Jun; Namura Akira
  Doboku Gakkai Ronbunshu, 1997, 575, 169, 178, Japan Society of Civil Engineers, 1997, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, To analyze the deformation of ballast regarding a part of ballasted track which is composed of crushed stone as an assemblage of coarse granular materials, cyclic loading and monotonic loading triaxial compression tests with stress condition of ballast under train passage were performed on samples of railroad ballast. As a result, the quasi-static characteristics of railroad ballast needed for numerical modeling were determined. It was revealed that the triaxial test results of railroad ballast basically provide useful data for elucidating plastic deformation of ballast in detail.
• Track maintenance for tilt train operation on sharp curves
  M Uchida; H Takai; T Ishikawa; E Yazawa; M Miwa
  INTERNATIONAL RAILWAY CONFERENCE ON BETTER JOURNEY TIME - BETTER BUSINESS, 1996, 8, 189, 198, 1996, [Peer-reviewed]
  English, International conference proceedings
• CYCLIC DEFORMATION CHARACTERISTICS OF RAILROAD BALLAST IN FULL-SCALE TESTS
  Ishikawa Tatsuya; Namura Akira
  Doboku Gakkai Ronbunshu, 1995, 512, 47, 59, Japan Society of Civil Engineers, 1995, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Scientific journal, In order to elucidate the phenomenon observed in ballasted track that irregularity of rail level accumulates in terms of the plastic deformation of railroad ballast, vertical and horizontal cyclic loading tests of constant load amplitude were performed with full-scale track. As a result, it was revealed that an effective estimation of the deformation of railroad ballast needs considering coarse granular materials as its material property. Besides, the deformation properties were quantified by test results, and a method to predict deformation quantity of railroad ballast was proposed, which has high utility value for design and maintenance of track structure.
• Fundamental Studies on Deformation Properties of Railway Ballast.
  石川達也; 名村明
  土質工学会シンポジウム発表論文集, Ryujotai no Rikigaku..., 51, 52, 1993, [Peer-reviewed], [Lead author, Corresponding author]
  Japanese, Symposium

• Wide-area risk assessment of rainfall induced slope failures considering regional characteristics using machine learning
  石川達也; 小野廉; 上野智生; 笠間清伸, 土木学会北海道支部論文報告集(CD-ROM), 80, 2024
• Accuracy verification of slope stability analysis coupling subsurface infiltration and surface flow
  村上朱明; 笠間清伸; ZHU Yulong; 石川達也, 地盤工学研究発表会(Web), 59th, 2024
• Effect of geosynthetic drainage material on freeze-thaw suppression and fatigue life extension
  小山大貴; 石川達也; 丸山記美雄; 弘中淳市, 地盤工学研究発表会(Web), 58th, 2023
• Verification of landslide disaster warning criteria using widearea slope stability analysis
  村上朱明; 笠間清伸; ZHU Yulong; 石川達也, 地盤工学研究発表会(Web), 58th, 2023
• 3D slope stability analysis considering infiltration and runoff during rainfall and snowmelt
  石川達也; 朱玉龍, 地盤工学会誌(Web), 71, 2, 2023
• Ground freezing/thawing and traffic infrastructure
  石川達也; 所哲也, 地盤工学会誌(Web), 71, 7, 2023
• Influence of suffusion on shear strength of saturated/unsaturated volcanic coarse-grained soils
  小原悠佑; 石川達也; 所哲也, 地盤工学会北海道支部技術報告集(CD-ROM), 63, 2023
• Proposal of an Accuracy Improvement Method for Wide-Area Slope Disaster Risk Assessment Considering Geotechnical Characteristics Using Machine Learning
  小野廉; 石川達也; 笠間清伸, 地盤工学会北海道支部技術報告集(CD-ROM), 63, 2023
• Resilient and permanent axial strain of crusher-run materials under the effect of principal stress axes rotation
  石川 達也, 第57回地盤工学研究発表会講演集, 1, 2022
• Proposal of slope disaster risk assessment index considering regional characteristics of rainfall and geology
  小野廉; 石川達也; 笠間清伸, 地盤工学研究発表会発表講演集(Web), 57th, 2022
• Attempt for risk evaluation of combined geo-hazards in vulnerable area to climate change
  石川達也; 川村志麻, 地盤工学会誌(Web), 70, 3, 2022
• Efforts for wide-area remote observation of pore water pressure on highway slopes in snowy cold regions
  佐藤泰地; 西村聡; 高橋亮介; 石川達也, 地盤工学会北海道支部技術報告集(CD-ROM), 62, 2022
• Proposal of capillary barrier system by optimizing grain size distribution of asphalt pavement
  古木達也; 石川達也; 馬場弘毅; 越智友紀, 地盤工学会北海道支部技術報告集(CD-ROM), 62, 2022
• Effect of aging on hydraulic and mechanical properties of ballast
  平松海斗; 石川達也; 浴達也; 中村貴久; 木次谷一平, 地盤工学会北海道支部技術報告集(CD-ROM), 62, 2022
• Case study for risk assessment of complex geodisasters in climate change vulnerable areas
  石川達也, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021
• Effects of fine fraction outflow from surface layer caused by rainfall history on slope stability
  村上卓生; 石川達也; 酒匂一成; 所哲也, 地盤工学会北海道支部技術報告集(CD-ROM), 61, 2021
• Proposal of installation method of geosynthetics drainage material for frost heave depression of road pavement
  安岡朋久; 石川達也; WU Yuwei; 所哲也; 丸山記美雄; 上野千草, 地盤工学会北海道支部技術報告集(CD-ROM), 61, 2021
• Design, construction and maintenance for railway track
  桃谷尚嗣; 中村貴久; 川崎祐征; 早野公敏; 岡安崇史; 石川達也, 地盤工学会誌(Web), 69, 3, 2021
• Wide/narrow-area slope stability analysis considering rainfall infiltration and runoff during heavy rain
  石川達也; HE Wentao, 日本地すべり学会研究発表会講演集(CD-ROM), 60th, 2021
• Fundamental experiment on frost heaving depression effect of geosynthetics drainage material
  奥田翔; 石川達也; WU Yuwei; 丸山記美雄; 上野千草, 地盤工学研究発表会発表講演集(Web), 56th, 2021
• Effect of aging on hydraulic and strength-deformation properties of ballast
  平松海斗; YANG Jiaqiang; 石川達也; 中村貴久; 木次谷一平, 地盤工学研究発表会発表講演集(Web), 56th, 2021
• Experiments on infiltration characteristics of base course materials for applicability evaluation of capillary barrier
  古木達也; 石川達也; 馬場弘毅; 越智友紀, 地盤工学研究発表会発表講演集(Web), 56th, 2021
• Influence of Age-related Deterioration on Rainfall Infiltration Characteristics of Unsaturated Granular Base
  金子治暉; 石川達也; 中村貴久; 木次谷一平; 平松海斗, 地盤工学会北海道支部技術報告集(CD-ROM), 61, 2021
• 平成30年北海道胆振東部地震による地盤災害と今後の検討課題
  石川 達也, Electric power civil engineering = 電力土木, 409, 3, 9, Sep. 2020
  電力土木技術協会, Japanese
• Sediment disasters caused by Typhoon Hagibis on October, 2019 in Tohoku region
  井良沢道也; 松尾新二朗; 新井瑞穂; 海堀正博; TSOU Ching-Ying; 山田孝; 笠井美青; 厚井高志; 加藤誠章; 若原妙子; 檜垣大助; 池田一; 石川芳治; 荒井健一; 広瀬伸二; 佐藤達也; 川端秀樹; 講武学; 丹羽諭; 菅原和宏; 松坂裕之; 多田信之; 金俊之, 砂防学会誌, 72, 6, 2020
• Effects of rainfall history on physical property of soil slope surface layer
  村上卓生; 石川達也; 酒匂一成; 所哲也, 地盤工学研究発表会発表講演集(Web), 55th, 2020
• Treatment of snowmelt water infiltration into cut slope in cold snowy regions
  笹原啓佑; 西村聡; 石川達也, 地盤工学研究発表会発表講演集(Web), 55th, 2020
• Geotechnical Engineering for Transportation Infrastructure-Overview-
  佐藤研一; 石川達也; 河井克之; 久利良夫; 阿部長門, 地盤工学会誌(Web), 68, 10, 2020
• Numerical analysis for fouled ballast with fine particles using subloading surface model
  木次谷一平; 中村貴久; 伊藤壱記; 石川達也; 岡安崇史, 地盤工学研究発表会発表講演集(Web), 55th, 2020
• Effect evaluation of grain refinement and particle shape change on water retentivity of aged ballast
  金子治暉; 平松海斗; 石川達也; 中村貴久; 木次谷一平, 地盤工学研究発表会発表講演集(Web), 55th, 2020
• バラスト軌道の降雨浸透特性に及ぼす経年劣化の影響
  金子治暉; 石川達也; 中村貴久; 木次谷一平, 地盤工学会北海道支部技術報告集(CD-ROM), 60, 2020
• 斜面内浸透に対する飽和積雪浸透モデルの適用性評価
  村上卓生; 石川達也; 西村聡; 笹原啓佑, 地盤工学会北海道支部技術報告集(CD-ROM), 60, 2020
• 道路盛土・切土への降雨・融雪の浸透の観測とその解析
  笹原啓佑; 西村聡; 石川達也; 水田隼登, 地盤工学会北海道支部技術報告集(CD-ROM), 60, 2020
• 気候変動脆弱地域における複合地盤災害のリスク評価の検討課題
  石川達也, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020
• Coupled THM analysis on the Freezing-Thaw behavior of Pavement with Wicking Fabric
  呉雨薇; 石川達也; 安岡朋久; LUO Bin, 地盤工学会北海道支部技術報告集(CD-ROM), 60, 60, 11, 18, 2020, [Peer-reviewed]
• 平成30年北海道胆振東部地震とその災害に関する総合調査
  高橋 浩晃; 勝俣 啓; 大園 真子; 橋本 武志; 青山 裕; 酒井 慎一; 松本 聡; 岡田 知己; 小菅 正裕; 寺川 寿子; 飯尾 能久; 中尾 茂; 上嶋 誠; 柴田 智郎; 大津 直; 高井 伸雄; 飯場 正紀; 渡部 要一; 菊地 優; 岡崎 太一郎; 白井 和貴; 西村 裕一; 石川 達也; 高瀬 裕也; 永井 宏; 宮森 保紀; 三宅 弘恵; 松島 信一; 浅野 公之; 重藤 迪子; 卜部 厚志; 前田 宜浩; 石澤 友浩; 廣瀬 亘; 小山内 信智; 山田 孝; 笠井 美青; 檜垣 大助; 風間 基樹; 千木良 雅弘; 渦岡 良介; 竹林 洋史; 木村 誇; 石丸 聡; 岡田 成幸; 内田 賢悦; 有村 幹治; 植松 武是; 多々納 裕一; 梶谷 義雄; 能島 暢呂; 田村 圭子; 中村 洋光; 戸松 誠, 自然災害科学総合シンポジウム講演論文集, 56th, 56, 21, 26, 11 Sep. 2019
  2019年9月11日(水), 於 : キャンパスプラザ京都 第1講義室「平成30年北海道胆振東部地震」とその災害に関する総合調査を実施した。震度７を記録した揺れにより, 同時多発斜面災害と, 北海道全域同時停電(ブラックアウト)が発生し, 複合的な災害となった。震源の深さは約37kmで, 大すべり域はそれより浅い20-25km付近であった。木造家屋の倒壊が多発したむかわ町市街では, 地盤構造による地震波の増幅が見られた。同時多発斜面崩壊は, 近隣の活火山の噴火による降下火砕堆積物が素因となった。札幌市内の地盤液状化地帯では, 極めて軟弱な谷埋盛土層が確認された。地震発生が未明であったことが, 建物倒壊による直接死が出なかったことに関係している可能性がある。ブラックアウトは, 社会経済活動に大きな影響を与えた。, 京都大学防災研究所自然災害研究協議会, Japanese
• 細粒土の凍上性が凍結中の未凍土部分における透水係数に与える影響
  廣瀬剛; 伊藤譲; 石川達也; 赤川敏; 所哲也, 土木学会年次学術講演会講演概要集(CD-ROM), 74th, 2019
• Effect evaluation of snow cover and grass on infiltration into soil ground during snowmelt period
  村上卓生; 石川達也; NGUYEN Binh Thanh; 横田聖哉; 蝦名浩二, 地盤工学研究発表会発表講演集(Web), 54th, 2019
• Coupled analysis on frost-heaving depression effect of geosynthetics drainage material for road pavement
  安岡朋久; 石川達也; BIN Luo; 所哲也; 丸山記美雄; 上野千草, 地盤工学研究発表会発表講演集(Web), 54th, 509, 520, 2019
• Effect of water content on unconfined compression strength of frozen unsaturated soil
  藤縄泰平; 所哲也; 高橋正一; 中村努; 石川達也, 地盤工学研究発表会発表講演集(Web), 54th, 2019
• Influence of Aged-related Deterioration on the Deformation-strength Characteristics of Coarse Granular Material under Traffic Loads
  青柳智之; 石川達也; 丸山記美雄; 上野千草, 地盤工学研究発表会発表講演集(Web), 54th, 2019
• Three-dimensional discrete element modelling for elucidation on lateral resistance of ballasted tracks
  中村貴久; 石川達也; 木次谷一平, 地盤工学研究発表会発表講演集(Web), 54th, 2019
• Drainage performance evaluation of aged ballasted track
  金子治暉; 石川達也; 中村貴久; 木次谷一平, 地盤工学研究発表会発表講演集(Web), 54th, 2019
• 交通荷重下の粗粒材の強度変形特性に及ぼす経年劣化の影響
  青柳智之; 石川達也; 丸山記美雄; 上野千草, 地盤工学会北海道支部技術報告集(CD-ROM), 59, ROMBUNNO.39, 2019
  Japanese
• 道央自動車道の切土および盛土法面の通年浸潤挙動
  西村聡; 石川達也; 磯部公一; 小松正宏; 蝦名浩二; 笹原啓佑, 地盤工学会北海道支部技術報告集(CD-ROM), 59, ROMBUNNO.32, 2019
  Japanese
• Disaster Survey Report of Slope Failures in Hokkaido, Japan Induced by 2016 August Typhoons
  石川達也; 川端伸一郎; 木幡行宏; 川村志麻, 北海道地区自然災害科学資料センター報告, 31, 3, 30, Mar. 2018
  北海道地区自然災害科学資料センター (北海道大学大学院工学研究院), Japanese
• 積雪寒冷地における雨水・融雪水の地盤内浸透流挙動予測
  森瑛; 石川達也; SUBRAMANIAN Srikrishnan Siva; THANH Nguyen Binh, 地盤工学会北海道支部技術報告集(CD-ROM), 58, 105‐114, 2018
  Japanese
• 寒冷地における路床土のレジリエントモデュラスの評価手法の検討
  青木亮介; 石川達也; 所哲也; LIN Tianshu, 地盤工学会北海道支部技術報告集(CD-ROM), 58, 58, 23‐30, 30, 2018
  Japanese
• 不飽和鉄道バラストの繰返し変形特性に及ぼす粒子径の影響評価
  松谷真吾; 石川達也; 青柳智之; 中村貴久; 桃谷尚嗣, 地盤工学会北海道支部技術報告集(CD-ROM), 58, 7‐16, 2018
  Japanese
• 凍結融解型保水性試験機の性能評価に関する基礎的実験
  青柳智之; 石川達也; 丸山記美雄; 工藤静瑠, 地盤工学会北海道支部技術報告集(CD-ROM), 58, 58, 217‐224, 224, 2018
  Japanese
• GISを用いた北海道における降雨による斜面崩壊の統計分析と危険度予測
  清水公陽; 磯部公一; 石川達也, 地盤工学会北海道支部技術報告集(CD-ROM), 58, 301‐308, 2018
  Japanese
• 鉄道バラストの繰返し変形特性に及ぼす細粒分と含水状態の影響評価
  青柳智之; 石川達也; 松谷真吾; 中村貴久; 木次谷一平, 地盤工学研究発表会発表講演集(CD-ROM), 53rd, ROMBUNNO.0594, 2018
  Japanese
• GISを用いた北海道における降雨による斜面崩壊の統計分析と危険度予測
  清水公陽; 磯部公一; 石川達也, 地盤工学研究発表会発表講演集(CD-ROM), 53rd, ROMBUNNO.1048, 2018
  Japanese
• 細粒土の凍結時に未凍土部分で生じる収縮クラックの透水係数に与える影響について
  廣瀬剛; 伊藤譲; 石川達也; 赤川敏; 所哲也; 大西有三, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, ROMBUNNO.III‐222, 2018
  Japanese
• Thawing characteristics of frost-susceptible material under various experimental conditions
  LAI Hao; LUO Bin; ISHIKAWA Tatsuya, 地盤工学会北海道支部技術報告集(CD-ROM), 57, ROMBUNNO.3, Feb. 2017
  English
• Wide-area analysis of runoff water and its effect to roadside slope failure: The case of Typhoon 10
  OPON Joel Galupo; SIVA SUBRAMANIAN Srikrishnan; ISHIKAWA Tatsuya; ISOBE Koichi; SHIMIZU Yasuyuki, 地盤工学会北海道支部技術報告集(CD-ROM), 57, ROMBUNNO.24, Feb. 2017
  English
• 降雨時における融雪水の地盤内浸透挙動に及ぼす気象条件の影響
  森瑛; THANH Nguyen Binh; 石川達也; 村山陽, 地盤工学研究発表会発表講演集(CD-ROM), 52nd, ROMBUNNO.0443, 2017
  Japanese
• 凍結時の繰返し載荷履歴が融解後の土のレジリエントモデュラスに及ぼす影響
  青木亮介; 所哲也; 石川達也, 地盤工学研究発表会発表講演集(CD-ROM), 52nd, ROMBUNNO.0551, 1100, 2017
  Japanese
• 細粒土混入道床バラストの保水性試験機の製作と性能評価に関する基礎的実験
  青柳智之; 石川達也; 松谷慎吾; 中村貴久; 桃谷尚嗣, 地盤工学研究発表会発表講演集(CD-ROM), 52nd, ROMBUNNO.0457, 2017
  Japanese
• 不飽和鉄道バラストの繰返し変形特性に及ぼす細粒分の影響評価
  松谷真吾; 石川達也; 青柳智之; 中村貴久; 桃谷尚嗣, 地盤工学研究発表会発表講演集(CD-ROM), 52nd, ROMBUNNO.0553, 2017
  Japanese
• 移動輪荷重作用下の不飽和路盤材の繰返し変形特性評価
  瀬戸哲; 石川達也; BIYANVILAGE Dareeju; CHAMINDA Gallage, 地盤工学会北海道支部技術報告集(CD-ROM), 57, ROMBUNNO.28, 2017
  Japanese
• 凍土の透水性に及ぼす間隙比の影響
  木村洸太; 所哲也; 石川達也, 地盤工学会北海道支部技術報告集(CD-ROM), 57, ROMBUNNO.7, 2017
  Japanese
• 不飽和鉄道バラストの強度変形特性に及ぼす粒子径の影響
  松谷真吾; 石川達也; 青柳智之; 中村貴久; 桃谷尚嗣, 地盤工学会北海道支部技術報告集(CD-ROM), 57, ROMBUNNO.10, 2017
  Japanese
• せん断土槽を用いた表層凍結地盤の振動台実験
  所哲也; 金子治暉; 石川達也; SRIKRISHNAN Subrmanian Siva, 地盤工学会北海道支部技術報告集(CD-ROM), 57, ROMBUNNO.34, 2017
  Japanese
• Sustainability on pavement engineering
  Jeffrey L. Lee; Dar Hao Chen; Tatsuya Ishikawa, International Journal of Pavement Research and Technology, 9, 6, 403, 404, 01 Nov. 2016
  Elsevier B.V., English
• 北海道地方における特色ある地域地盤特性例と調査・設計・施工上の留意点 (特集 地域地盤特性と基礎工 : 東日本編)
  石川 達也, 基礎工 = The foundation engineering & equipment, monthly : 土木・建築基礎工事と機材の専門誌, 44, 11, 6, 11, Nov. 2016
  総合土木研究所, Japanese
• Applicability of three-dimensional coupled seepage and thermal analysis to soil slope stability in cold region
  NGUYEN Binh Thanh; ISHIKAWA Tatsuya; SIVA SUBRAMANIAN Srikrishnan; YOKOHAMA Shoji; TOKORO Tetsuya, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.40, Jan. 2016
  English
• Numerical simulation of shaking table tests under freezing and thawing conditions
  SIVA SUBRAMANIAN Srikrishnan; ISHIKAWA Tatsuya; TOKORO Tetsuya; KUSUNOKI Fumiya, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.39, Jan. 2016
  English
• 不飽和鉄道バラストの強度変形特性に及ぼす細粒分の影響評価
  松谷真吾; 石川達也; 福真治; 中村貴久; 桃谷尚嗣, 地盤工学研究発表会発表講演集(CD-ROM), 51st, ROMBUNNO.0493, 2016
  Japanese
• TC202(交通地盤工学)活動への国内委員会の貢献と戦略
  石川達也; 桃谷尚嗣; 早野公敏, 地盤工学研究発表会発表講演集(CD-ROM), 51st, ROMBUNNO.0036, 2016
  Japanese
• 路床・路盤材の材料特性試験方法のイノベーションに向けた研究動向
  石川達也; 桃谷尚嗣; 中村貴久; 早野公敏; 河井勝之; 小関裕二; 高橋茂樹; 廣津栄三郎, 地盤工学研究発表会発表講演集(CD-ROM), 51st, ROMBUNNO.0492, 2016
  Japanese
• 水分分布近似法を用いた不飽和透水試験装置の開発
  森瑛; 石川達也; THANH Nguyen Binh; 所哲也, 地盤工学研究発表会発表講演集(CD-ROM), 51st, ROMBUNNO.0484, 2016
  Japanese
• 凍土の透水性に及ぼす不凍水量の影響
  木村洸太; 所哲也; 石川達也, 地盤工学研究発表会発表講演集(CD-ROM), 51st, ROMBUNNO.0434, 2016
  Japanese
• 道床バラストの細粒分含有量が強度特性に及ぼす影響
  木次谷一平; 中村貴久; 桃谷尚嗣; 石川達也, 地盤工学研究発表会発表講演集(CD-ROM), 51st, ROMBUNNO.0494, 2016
  Japanese
• 不飽和鉄道バラストの強度変形特性に及ぼす細粒分の影響評価
  福真治; 石川達也; 松谷真吾; 中村貴久; 桃谷尚嗣, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.15, 2016
  Japanese
• 表層凍結状態における地震時の地盤の挙動に関する実験的研究
  所哲也; 楠章哉; 石川達也; SIVA SRIKRISHNAN Subrmanian, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.38, 2016
  Japanese
• 北海道における降雨特性の変化と年代的特徴
  川端伸一郎; 川尻峻三; 石川達也, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.45, 2016
  Japanese
• 火山灰質粗粒土における透水性能の異方性に関する考察
  木村充宏; 石川達也; 中田隆文; SIVA SUBRMANIAN Srikrishnan; NGUYEN Binh; Thanh, 森暎, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.27, 2016
  Japanese
• 凍結方法の違いによる凍土壁造成時の限界流速についての検討
  山添稜也; 石川達也; 伊藤譲, 地盤工学会北海道支部技術報告集(CD-ROM), 56, ROMBUNNO.41, 2016
  Japanese
• 凍結融解繰り返しによる飽和細粒土のアイスレンズ面方向の透水係数変化について(1)
  廣瀬剛; 廣瀬剛; 伊藤譲; 石川達也; 赤川敏; 所哲也; 大西有三, 土木学会年次学術講演会講演概要集(CD-ROM), 71st, ROMBUNNO.III‐314, 2016
  Japanese
• 凍結融解繰り返しによる飽和細粒土のアイスレンズ面方向の透水係数変化について(2)
  伊藤譲; 廣瀬剛; 廣瀬剛; 石川達也; 所哲也; 赤川敏; 大西有三, 土木学会年次学術講演会講演概要集(CD-ROM), 71st, ROMBUNNO.III‐315, 2016
  Japanese
• 地域地盤特性と基礎工―東日本編―北海道地方における特色ある地域地盤特性例と調査・設計・施工上の留意点
  石川達也, 基礎工, 44, 11, 006‐011, 2016
  Japanese
• Evaluation of applicability of numerical modelling tools for complex slope stability problems in Hokkaido
  SIVA SUBRAMANIAN Srikrishnan; ISHIKAWA Tatsuya; TOKORO Tetsuya, 地盤工学会北海道支部技術報告集(CD-ROM), 55, ROMBUNNO.36, Jan. 2015
  English
• 不飽和路床材の繰返し塑性変形に及ぼす主応力軸回転の影響
  瀬戸哲; 石川達也; DAREEJU Biyanvilage; GALLAGE Chaminda, 地盤工学研究発表会発表講演集(CD-ROM), 50th, ROMBUNNO.605, 2015
  Japanese
• 過圧密粘性土の凍結融解による透水係数変化に関する実験
  伊藤譲; 石川達也; 赤川敏; 所哲也; 大西有三; 上田保司; 廣瀬剛, 地盤工学研究発表会発表講演集(CD-ROM), 50th, ROMBUNNO.448, 2015
  Japanese
• 火山灰質土の透水性能の構造異方性の評価
  木村充宏; 中田隆文; 石川達也, 土木学会北海道支部論文報告集(CD-ROM), 71, ROMBUNNO.C-03, 2015
  Japanese
• 凍結融解作用を受ける地盤の透水性に及ぼす凍結方法及び凍上性の影響
  高橋優紀; 石川達也; 所哲也; 木次谷一平; 浦崎拓人, 地盤工学会北海道支部技術報告集(CD-ROM), 55, ROMBUNNO.28, 2015
  Japanese
• 凍上性・非凍上性材料の凍結土圧の測定
  所哲也; 石川達也, 地盤工学会北海道支部技術報告集(CD-ROM), 55, ROMBUNNO.31, 2015
  Japanese
• 応力変形・熱伝導・浸透連成解析による地盤‐構造物の凍上挙動予測
  木次谷一平; 石川達也; 所哲也, 里優, 地盤工学会北海道支部技術報告集(CD-ROM), 55, ROMBUNNO.34, 2015
  Japanese
• 凍土壁を有する地盤の浸透流予測に対する連成解析手法の適用
  山添稜也; 石川達也; 高橋優紀; 浦崎拓人, 地盤工学会北海道支部技術報告集(CD-ROM), 55, ROMBUNNO.35, 2015
  Japanese
• 飽和細粒土の凍結融解前後における熱流直角方向の透水係数変化に関する実験
  廣瀬剛; 伊藤譲; 石川達也; 赤川敏; 所哲也; 大西有三, 土木学会関西支部年次学術講演会講演概要集(CD-ROM), 2015, ROMBUNNO.III-13, 2015
  Japanese
• 飽和細粒土の凍結融解前後におけるアイスレンズ面方向の透水係数変化に関する実験
  廣瀬剛; 伊藤譲; 石川達也; 赤川敏; 所哲也; 大西有三; 上田保司, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, ROMBUNNO.III-281, 2015
  Japanese
• 凍土壁造成における限界流速に関する基礎的実験・解析
  山添稜也; 石川達也; 伊藤譲, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, ROMBUNNO.III-276, 2015
  Japanese
• 飽和凍土の透水係数の温度依存性
  所哲也; 石川達也; 赤川敏; 伊藤譲; 佐々木飛翔; 大西有三; 廣瀬剛; 上田保司, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, ROMBUNNO.III-279, 2015
  Japanese
• 低土被り圧におけるサクションを考慮した修正高志の式の提案
  石川達也; 木次谷一平; 所哲也; 赤川敏, 地盤工学研究発表会発表講演集(CD-ROM), 49th, ROMBUNNO.429, 2014
  Japanese
• 砂の熱伝導率の水分依存性を考慮した熱伝導モデル
  所哲也; 石川達也; 白井翔也; 中村努, 地盤工学研究発表会発表講演集(CD-ROM), 49th, ROMBUNNO.218, 2014
  Japanese
• 砂質土凍土壁の遮水性に及ぼす凍結条件の影響
  高橋優紀; 山添稜也; 石川達也; 所哲也, 地盤工学研究発表会発表講演集(CD-ROM), 49th, ROMBUNNO.427, 2014
  Japanese
• 応力変形・熱伝導・浸透連成解析の実問題への適用例
  木次谷一平; 石川達也; 所哲也, 里優, 地盤工学会北海道支部技術報告集, 54, 65, 68, 2014
  Japanese
• サーマルプローブ法による砂質凍土の熱伝導率の測定
  青木亮介; 所哲也; 石川達也; 白井翔也; 中村努, 土木学会年次学術講演会講演概要集(CD-ROM), 69th, ROMBUNNO.III-127, 2014
  Japanese
• TC202. Transportation Geotechnics(18th International Conference of Soil Mechanics and Geotechnical Engineering)
  石川 達也, 地盤工学会誌, 62, 3, 26, 26, 2014
  社団法人地盤工学会, Japanese
• 寒冷地におけるアスファルト舗装の損傷とその原因
  川端 伸一郎; 亀山 修一; 石川 達也, 舗装, 48, 7, 7, 11, Jul. 2013
  建設図書, Japanese
• Dependency of shear behavior of unsaturated base course material on experimental conditions
  ZHANG Yuan; ISHIKAWA Tatsuya; HAMAURA Tetsukazu; TOKORO Tesuya, 地盤工学会北海道支部技術報告集, 53, 119, 122, Jan. 2013
  English
• 火山灰質粘性土の凍上性におよぼす凍結速度の影響
  木次谷一平; 石川達也; 所哲也, 地盤工学研究発表会発表講演集(CD-ROM), 48th, ROMBUNNO.522, 2013
  Japanese
• 供試体寸法および凍結方法の違いが凍上試験結果に与える影響
  川端伸一郎; 石川達也; 亀山修一, 地盤工学研究発表会発表講演集(CD-ROM), 48th, ROMBUNNO.519, 2013
  Japanese
• 応力変形・熱伝導・浸透連成解析による土の凍上融解現象の数値実験
  石川達也; 木次谷一平; 所哲也, 里優, 地盤工学会北海道支部技術報告集, 53, 231, 240, 2013
  Japanese
• 砂およびシルトの熱伝導率の水分依存性
  所哲也; 白井翔也; 石川達也; 中村努, 地盤工学会北海道支部技術報告集, 53, 191, 194, 2013
  Japanese
• Evaluation of air-permeability for unsaturated soil ground subjected to freeze-thaw action
  山本隼央; 石川達也; 山下聡; 中村大; 所哲也, 地盤工学会北海道支部技術報告集, 53, 11, 20, 2013
  公益社団法人 地盤工学会 北海道支部, Japanese
• 種々の地盤材料の凍結融解挙動の土被り圧依存性
  木次谷一平; 石川達也; 所哲也, 地盤工学会北海道支部技術報告集, 53, 255, 262, 2013
  Japanese
• 凍結指数の地域分布および年代特性に関する考察
  川端伸一郎; 佐藤厚子; 石川達也, 地盤工学会北海道支部技術報告集, 53, 263, 270, 2013
  Japanese
• 寒冷地におけるアスファルト舗装の損傷とその要因
  川端伸一郎; 亀山修一; 石川達也, 舗装, 48, 7, 7, 11, 2013
  Japanese
• サーマルプローブ法を用いた種々の地盤材料の熱伝導率の測定
  白井翔也; 所哲也; 石川達也; 中村努, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, ROMBUNNO.III-098, 2013
  Japanese
• Preface
  Seiichi Miura; Tatsuya Ishikawa, Advances in Transportation Geotechnics II - Proceedings of the 2nd International Conference on Transportation Geotechnics, ICTG 2012, 19 Oct. 2012, [Last author]
  English
• 粒状路盤の支持力特性に及ぼす凍結融解作用の影響
  吉田有喜; 石川達也, 地盤工学研究発表会発表講演集(CD-ROM), 47th, ROMBUNNO.726, 2012
  Japanese
• 不飽和粒状路盤材の力学挙動評価のための中型不飽和三軸試験機の開発
  瀬川宙郷; 石川達也; 三浦清一; 所哲也, 地盤工学会北海道支部技術報告集, 52, 27, 34, 2012
  Japanese
• 舗装構造の疲労寿命に及ぼす再生砕石粒状路盤の凍結融解の影響とその評価
  吉田有喜; 石川達也; 三浦清一, 地盤工学会北海道支部技術報告集, 52, 35, 42, 2012
  Japanese
• 砂の熱伝導率の水分依存性
  所哲也; 石川達也; 中村努; 白井翔也, 土木学会年次学術講演会講演概要集(CD-ROM), 67th, ROMBUNNO.III-008, 2012
  Japanese
• 凍結融解作用が粒状路盤材のCBRに与える影響について(第2報)
  村山巧; 川端伸一郎; 石川達也; 亀山修一; 小野丘, 土木学会年次学術講演会講演概要集(CD-ROM), 67th, ROMBUNNO.III-126, 2012
  Japanese
• DEPENDENCY OF SHEAR BEHAVIOR OF BASE COARSE MATERIALS ON MOISTURE CONTENT EVALUATION BY MULTI-RING SHEAR TESTING
  INAM Aasim; ISHIKAWA Tatsuya; MIURA Seiichi; SEGAWA Hirosato, 地盤工学会北海道支部技術報告集, 51, 95, 101, Feb. 2011
  English
• 凍結融解履歴を受ける不飽和地盤の透気性評価
  山本隼央; 石川達也; 所哲也; 中村大; 山下聡, 地盤工学研究発表会発表講演集(CD-ROM), 46th, ROMBUNNO.515, 2011
  Japanese
• 凍結融解作用が粒状路盤材のCBRに与える影響について
  村山巧; 川端伸一郎; 小野丘; 石川達也, 土木学会年次学術講演会講演概要集(CD-ROM), 66th, ROMBUNNO.III-404, 2011
  Japanese
• 2-330 Efforts of Faculty Development at Faculty of Engineering in Hokkaido University : Report on the activity of FD in fiscal 2010
  ISHIKAWA Tatsuya; KAJIWARA Itsuro; MATSUDA Osamu; NARITA Yoshihiro, Proceedings of Annual Conference of Japanese Society for Engineering Education, 2011, 0, 536, 537, 2011
  Japanese Society for Engineering Education, Japanese
• 不飽和土(強度)(3.地盤材料,総括,<特集>第46回地盤工学研究発表会)
  石川 達也, 地盤工学会誌, 59, 12, 27, 27, 2011
  地盤工学会, Japanese
• Support Activities for Engineers in JGS Hokkaido Branch and Their Achievements
  ISHIKAWA Tatsuya, 地盤工学会誌 = / the Japanese Geotechnical Society, 58, 10, 28, 29, 01 Oct. 2010
  The JGS Hokkaido Branch has continuously and energetically supported geotechnical engineers in Hokkaido since its establishment. The support activities are conducted through the holding of some annual academic events such as technical report conferences and geotechnical seminars, international activities such as international conferences and symposiums, and committee activities of various technical committees established by the branch. This paper introduces a part of the support activities that the JGS Hokkaido Branch has grappled with so far and their achievements in order to support many geotechnical engineers who confront local research assignments., The Japanese Geotechnical Society, Japanese
• 線路部門 バラスト軌道の列車荷重による沈下予測法
  関根 悦夫; 石川 達也, 日本鉄道施設協会誌, 48, 2, 140, 143, Feb. 2010
  日本鉄道施設協会, Japanese
• 凍上・凍結融解斜面の応力変形・熱伝導・浸透連成解析方法の提案
  石川達也; 里優; 赤川敏; 川村志麻, 地盤工学会北海道支部技術報告集, 50, 163, 172, 2010
  Japanese
• バラスト軌道の列車荷重による沈下予測法
  関根悦夫; 石川達也, 日本鉄道施設協会誌, 48, 2, 140, 143, 2010
  Japanese
• 凍結作用を受ける不飽和地盤の透気係数の測定
  石川達也; 本間裕助; 山下聡; 所哲也, 地盤工学研究発表会発表講演集, 45th, 1, 875, 876, 2010
  Japanese
• 積雪寒冷地にある斜面の現地計測結果とその考察
  川村志麻; 五十嵐はるか; 三浦清一; 石川達也; 横浜勝司, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, ROMBUNNO.III-046, 2010
  Japanese
• 斜面の凍上被害と対策のガイドライン
  地盤工学会北海道支部, 2010
• 1505 A simple cyclic plastic deformation analysis of ballasted track by cumulative damage model
  KAMEI Takehiko; ISHIKAWA Tatsuya; SEKINE Etsuo; MIURA Seiichi, Jointed railway technology symposium, 2009, 16, 221, 222, 02 Dec. 2009
  This paper presents a simple cyclic plastic deformation analysis of ballasted track subjected to cyclic loads in terms of the strength and deformation of railroad ballast. A new analytical procedure with linear elastic FEM considering the cumulative strain derived from cyclic triaxial compression test results of railroad ballast was proposed. By comparing real-scale model test of ballasted track with the analytical results, and it was revealed that the analytical procedure could roughly estimate the residual settlement of railroad ballast under cyclic loads., The Japan Society of Mechanical Engineers, Japanese
• Evaluation of effects of roadbed stiffness on deformation properties of ballasted track with DDA
  関根 悦夫; 石川 達也, RTRI report, 23, 10, 17, 22, Oct. 2009
  研友社, Japanese
• Report of the 10th Workshop on Unsaturated Soils in 2008 Fiscal Year
  石川 達也; 石川 達也, 地盤工学会誌 = / the Japanese Geotechnical Society, 57, 4, 37, 37, 01 Apr. 2009
  The Japanese Geotechnical Society, Japanese
• 舗装と交通荷重に関する地盤工学 : 7. 鉄道路盤の現状と課題
  関根 悦夫; 桃谷 尚嗣; 石川 達也, 地盤工学会誌 = / the Japanese Geotechnical Society, 57, 3, 54, 61, 01 Mar. 2009
  地盤工学会, Japanese
• 加圧膜法による砂質土の不飽和透水係数の測定
  所哲也; 石川達也; 三浦清一, 地盤工学会北海道支部技術報告集, 49, 249, 252, 2009
  Japanese
• 微細多孔質膜を用いた不飽和土三軸圧縮試験に関する研究
  伊藤康平; 石川達也; 三浦清一, 地盤工学会北海道支部技術報告集, 49, 245, 248, 2009
  Japanese
• 凍結・融解履歴を受ける不飽和火山灰質土斜面の降雨時力学挙動
  川村志麻; 中野博貴; 三浦清一; 石川達也, 地盤工学会北海道支部技術報告集, 49, 233, 240, 2009
  Japanese
• 舗装と交通荷重に関する地盤工学 7.鉄道路盤の現状と課題
  関根悦夫; 桃谷尚嗣; 石川達也, 地盤工学会誌, 57, 3, 54-61,1(1), 2009
  Japanese
• 札幌地域における電子地盤図の作成
  石川達也; 福島宏文; 遠藤秀博; 今泉浩明, 地盤工学研究発表会発表講演集, 44th, 183, 184, 2009
  Japanese
• 柏原火山灰土の不飽和力学特性に及ぼす凍結融解作用の影響
  石川達也; 所哲也; 伊藤康平; 三浦清一, 地盤工学研究発表会発表講演集, 44th, 685, 686, 2009
  Japanese
• 凍結・融解履歴を受けた不飽和火山灰質土斜面の降雨時力学挙動
  川村志麻; 中野博貴; 三浦清一; 石川達也, 地盤工学研究発表会発表講演集, 44th, 687, 688, 2009
  Japanese
• 給排水経路の断面積が砂の不飽和透水係数に及ぼす影響
  所哲也; 石川達也; 三浦清一, 地盤工学研究発表会発表講演集, 44th, 963, 964, 2009
  Japanese
• 再生砕石粒状路盤の繰返し変形挙動に及ぼす移動荷重の影響
  大塚寿貴; 石川達也; 三浦清一, 地盤工学研究発表会発表講演集, 44th, 877, 878, 2009
  Japanese
• 凍結融解作用を受ける火山灰土斜面の熱伝導/応力変形連成解析
  石川達也; 里優; 赤川敏; 三浦清一, 土木学会年次学術講演会講演概要集(CD-ROM), 64th, Disk 1, ROMBUNNO.III-128, 2009
  Japanese
• Evaluation of Effects of Roadbed Stiffness on Deformation Properties of Ballasted Track with DDA
  関根悦夫; 石川達也, 鉄道総研報告, 23, 10, 17, 22, 2009
  Japanese
• A simple cyclic plastic deformation analysis of ballasted track by cumulative damage model
  亀井威彦; 石川達也; 関根悦夫; 三浦清一, 鉄道技術連合シンポジウム講演論文集, 16th, 221, 222, 2009
  Japanese
• 凍結融解作用を受ける火山灰土斜面の応力/浸透連成解析
  石川 達也; 三浦 清一; 川村 志麻, 土木学会年次学術講演会講演概要集, 63, 3, 141, 142, Sep. 2008
  土木学会, Japanese
• 不透水層を有する火山灰質土斜面の降雨時力学挙動
  川村 志麻; 井野 寿人; 三浦 清一; 石川 達也; 中野 博貴, 土木学会年次学術講演会講演概要集, 63, 3, 191, 192, Sep. 2008
  土木学会, Japanese
• Estimation method of plastic deformation of ballasted track under cyclic moving wheel loads by FE analysis
  関根悦夫; 石川達也, RTRI report, 22, 8, 11, 16, Aug. 2008
  研友社, Japanese
• 凍結・融解履歴を有する火山灰質土斜面の降雨時力学挙動とその評価
  川村 志麻; 三浦 清一; 石川 達也, 地盤工学会北海道支部技術報告集 第48号, 253, 262, 2008
• 凍結・融解履歴を有する火山灰質土斜面の降雨時力学挙動とその評価
  井野寿人; 川村志麻; 三浦清一; 石川達也, 地盤工学会北海道支部技術報告集, 48, 97, 106, 2008
  Japanese
• 移動荷重作用下の粒状路盤の力学挙動とその評価
  細田充; 石川達也; 三浦清一, 地盤工学会北海道支部技術報告集, 48, 253, 262, 2008
  Japanese
• 凍結・融解履歴を受けた火山灰質土斜面の降雨時力学挙動
  川村志麻; 井野寿人; 三浦清一; 石川達也, 地盤工学研究発表会発表講演集, 43rd, 2043, 2044, 2008
  Japanese
• 破砕性粒状体の強度特性に及ぼす含水状態の影響評価
  吉田永; 三浦清一; 石川達也, 地盤工学研究発表会発表講演集, 43rd, 767, 768, 2008
  Japanese
• FEM解析による井桁まくらぎの改良効果の検討
  亀井威彦; 石川達也; 佐々博明, 土木学会年次学術講演会講演概要集(CD-ROM), 63rd, Disk 2, ROMBUNNO.4-021, 2008
  Japanese
• 不透水層を有する火山灰質土斜面の降雨時力学挙動
  川村志麻; 井野寿人; 三浦清一; 石川達也; 中野博貴, 土木学会年次学術講演会講演概要集(CD-ROM), 63rd, Disk 1, ROMBUNNO.3-096, 2008
  Japanese
• 凍結融解作用を受ける火山灰土斜面の応力/浸透連成解析
  石川達也; 三浦清一; 川村志麻, 土木学会年次学術講演会講演概要集(CD-ROM), 63rd, Disk 1, ROMBUNNO.3-071, 2008
  Japanese
• Estimation Method of Plastic Deformation of Ballasted Track under Cyclic Moving Wheel Loads by FE Analysis
  関根悦夫; 石川達也, 鉄道総研報告, 22, 8, 11, 16, 2008
  Japanese
• 動的性質(2)((2)動的性質,3.地盤材料-砂質土,<特集>第43回地盤工学研究発表会)
  石川 達也, 地盤工学会誌, 56, 12, 26, 26, 2008
  地盤工学会, Japanese
• 降雨による北海道火山灰質土斜面の崩壊とその評価に関する模型実験
  井野寿人; 川村志麻; 木幡行宏; 三浦清一; 石川達也; 横浜勝司, 土木学会年次学術講演会講演概要集(CD-ROM), 62, 3, 13, 14, Sep. 2007
  土木学会, Japanese
• 火山灰地盤の斜面崩壊挙動に対する不連続体解析方法の検討
  石川達也; 三浦清一; 横浜勝司; 川村志麻, 土木学会年次学術講演会講演概要集(CD-ROM), 62, 3, 27, 28, Sep. 2007
  土木学会, Japanese
• 粒子形状の評価と土の力学挙動
  松島亘志; 前田健一; 石川達也, 土と基礎, 55, 6, 37, 44, 01 Jun. 2007
  地盤工学会, Japanese, Introduction scientific journal
• 粒子特性の評価と工学的意義 : 粒子形状の評価と土の力学挙動
  松島 亘志; 前田 健一; 石川 達也, 土と基礎 = Soil mechanics and foundation engineering, 55, 6, 37, 44, 01 Jun. 2007
  地盤工学会, Japanese
• Prediction of plastic deformation of ballasted track by cumulative damage model
  関根悦夫; 石川達也, RTRI report, 21, 6, 17, 22, Jun. 2007
  研友社, Japanese
• 粒子特性の評価と工学的意義 3.粒径・粒度の評価と土の力学挙動
  石川達也; 兵動正幸; 陳光斉, 土と基礎, 55, 5, 47, 52, 01 May 2007
  地盤工学会, Japanese
• 3.粒径・粒度の評価と土の力学挙動(粒子特性の評価と工学的意義)
  石川 達也; 兵動 正幸; 陳 光斉, 土と基礎, 55, 5, 47, 52, 01 May 2007
  社団法人地盤工学会, Japanese
• 粒子特性の評価と工学的意義 : 粒子特性の評価と実問題(その1)
  片桐 雅明; 安福 規之; 藤山 哲雄; 石川 達也, 土と基礎 = Soil mechanics and foundation engineering, 55, 4, 62, 68, 01 Apr. 2007
  地盤工学会, Japanese
• 礫の繰返し変形特性に及ぼす粒径及び主応力回転の影響
  福津圭基; 石川達也; 三浦清一; 関根悦夫, 地盤工学会北海道支部技術報告集, 47, 155, 160, 2007
  Japanese
• 粒子特性の評価と工学的意義 2.粒子特性の評価と実問題(その1)
  片桐雅明; 安福規之; 藤山哲雄; 石川達也, 土と基礎, 55, 4, 62-68,1(4), 2007
  Japanese
• 粒子特性の評価と工学的意義 4.粒子形状の評価と土の力学挙動
  松島亘志; 前田健一; 石川達也, 土と基礎, 55, 6, 37-44,1(4), 2007
  Japanese
• 破砕性火山灰土の力学特性に及ぼす凍結融解履歴の影響
  尾崎悠太; 石川達也; 三浦清一, 地盤工学研究発表会発表講演集, 42nd, 743, 744, 2007
  Japanese
• 礫材のせん断特性に及ぼす粒径と主応力軸回転の影響
  石川達也; 福津圭基; 三浦清一; 関根悦夫, 地盤工学研究発表会発表講演集, 42nd, 995, 996, 2007
  Japanese
• 破砕性粒状体の水分保持特性に及ぼす凍結融解履歴の影響
  伊藤康平; 三浦清一; 石川達也; 尾崎悠太, 地盤工学研究発表会発表講演集, 42nd, 745, 746, 2007
  Japanese
• Application of FE analysis based on cumulative damage model to mechanical behavior of ballasted track
  ISHIKAWA TATSUYA; SEKINE ETSUO; MIURA SEIICHI, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 56, 0, 93, 93, 2007
  This paper presents a simple method to estimate cyclic plastic deformation of ballasted track subjected to repeated loads in terms of the strength and deformation characteristics of coarse granular materials. A new analytical procedure with linear elastic FE analysis considering the cumulative strain derived from element test results of ballast was proposed, and it was revealed that the analytical procedure could roughly estimate the residual deformation of railroad ballast, which is an assemblage of poorly-graded crushed stone, by simulating small scale model tests of ballasted track., National Committee for IUTAM, Japanese
• Prediction of Plastic Deformation of Ballasted Track by Cumulative Damage Model
  関根悦夫; 石川達也, 鉄道総研報告, 21, 6, 17, 22, 2007
  Japanese
• 特殊土・不飽和土 : 特殊土,水浸・凍結融解他,力学特性,動的性質(3.地盤材料,総括,<小特集>第42回地盤工学研究発表会)
  石川 達也, 土と基礎, 55, 12, 24, 24, 2007
  土質工学会, Japanese
• Evaluating Seismic Resistant Performance of Ballasted Track by Cumulative Damage Model
  関根悦夫; 石川達也, 鉄道総研報告, 20, 4, 17, 22, Apr. 2006
  研友社, Japanese
• 多重リングせん断試験機による砕石の繰返し変形挙動予測
  杉山圭大; 石川達也; 三浦清一; 関根悦夫, 地盤工学会北海道支部技術報告集, 46, 175, 184, 2006
  Japanese
• 連続体・不連続体解析による粒状構造物の挙動解析法の提案
  石川達也, 地盤工学会北海道支部技術報告集, 46, 185, 194, 2006
  Japanese
• 不連続変形法によるバラスト軌道の繰返し塑性変形挙動解析
  小林慶祐; 石川達也; 関根悦夫; 三浦清一, 地盤工学会北海道支部技術報告集, 46, 167, 174, 2006
  Japanese
• 粒状体地盤の凍結融解履歴による動的力学挙動の変化
  山木正彦; 所哲也; 三浦清一; 石川達也; 横浜勝司, 地盤工学会北海道支部技術報告集, 46, 215, 220, 2006
  Japanese
• 移動荷重作用下の粒状構造物の変形挙動解析法の検討
  石川達也; 細田充; 関根悦夫; 三浦清一, 地盤工学研究発表会発表講演集, 41st, 1071, 1072, 2006
  Japanese
• 破砕性の卓越する粒状体の力学特性に及ぼす凍結融解の影響
  尾崎悠太; 三浦清一; 石川達也; 熊谷浩輔, 地盤工学研究発表会発表講演集, 41st, 873, 874, 2006
  Japanese
• 凍結・融解作用を受ける粒状地盤材料の力学挙動のモデル化
  玉置和美; 石川達也; 三浦清一, 土木学会年次学術講演会講演概要集(CD-ROM), 61st, Disk 1, ROMBUNNO.3-355, 2006
  Japanese
• Evaluating Seismic Resistant Performance of Ballasted Track by Cumulative Damage Model
  関根悦夫; 石川達也, 鉄道総研報告, 20, 4, 17, 22, 2006
  Japanese
• 2003年十勝沖地震地盤災害
  三浦 清一; 石川 達也, 土と基礎 = Soil mechanics and foundation engineering, 53, 12, 39, 40, 01 Dec. 2005
  土質工学会, Japanese
• 日本に分布する火山灰質土の概要と分類
  三浦 清一; 八木 一善; 石川 達也, 土と基礎 = Soil mechanics and foundation engineering, 53, 10, 39, 46, 01 Oct. 2005
  地盤工学会, Japanese
• 道床バラストの繰返し塑性変形に及ぼす道床厚さの影響 (特集:軌道技術)
  関根 悦夫; 石川 達也; 河野 昭子, 鉄道総研報告, 19, 2, 17, 22, Feb. 2005
  研友社, Japanese
• Deformation Characteristics of Ballasted Track during Earthquake
  関根悦夫; 石川達也, 鉄道総研報告, 19, 2, 23, 28, Feb. 2005
  研友社, Japanese
• 累積損傷度理論こ基づくFEM解析の鉄道軌道構造の耐震性能評価への適用
  泉剛生; 石川達也; 関根悦夫; 室野剛隆, 地盤工学会北海道支部技術報告集, 45, 145, 152, 2005
  Japanese
• 3次元個別要素法による粒状材料のせん断試験の数値実験
  玉置和美; 石川達也; 三浦清一, 地盤工学会北海道支部技術報告集, 45, 219, 224, 2005
  Japanese
• 多重リングせん断試験機による単粒度砕石の繰返し変形挙動の検討
  石川達也; 関根悦夫; 杉山圭大; 三浦清一, 地盤工学会北海道支部技術報告集, 45, 105, 114, 2005
  Japanese
• 不連続変形法による模型バラスト軌道の支持力解析
  小林慶祐; 石川達也; 三浦清一; 関根悦夫, 地盤工学研究発表会発表講演集, 40th, 909, 910, 2005
  Japanese
• 多重式リングせん断試験機による砕石の繰返し変形挙動に及ぼす主応力回転の影響の検討
  杉山圭大; 石川達也; 三浦清一; 関根悦夫, 地盤工学研究発表会発表講演集, 40th, 545, 546, 2005
  Japanese
• 列車荷重を受けるバラスト軌道の塑性変形に及ぼす路盤剛性の影響
  関根悦夫; 河野昭子; 村本勝己; 石川達也, 地盤工学研究発表会発表講演集, 40th, 1169, 1170, 2005
  Japanese
• 2003年十勝沖地震での地盤災害の特徴
  横浜勝司; 三浦清一; 石川達也, 地盤工学研究発表会発表講演集, 40th, 2165, 2166, 2005
  Japanese
• 火山灰質土―その性質と設計施工―2.日本に分布する火山灰質土の概要と分類
  三浦清一; 八木一善; 石川達也, 土と基礎, 53, 10, 39-46,1(1)-1(3), 2005
  Japanese
• Effect of Ballast Thickness on Cyclic Plastic Deformation of Railroad Ballast under Train Passage
  関根悦夫; 石川達也; 河野昭子, 鉄道総研報告, 19, 2, 17, 22, 2005
  Japanese
• Deformation Characteristics of Ballasted Track during Earthquake
  関根悦夫; 石川達也, 鉄道総研報告, 19, 2, 23, 28, 2005
  Japanese
• 道床バラストの繰返し塑性変形に及ぼす移動荷重の影響 (特集:軌道技術)
  関根 悦夫; 石川 達也; 木幡 行宏, 鉄道総研報告, 18, 3, 17, 22, Mar. 2004
  研友社, Japanese
• せん断モードの異なる破砕性粒状体の強度-変形特性
  石川 達也; 三浦 清一, 土木学会第59回年次学術講演会講演概要集 III-011, 21, 22, 2004
• 各種離散化解析手法による模型バラスト軌道の繰返し塑性変形挙動解析
  石川達也; 関根悦夫; 河野昭子; 小林慶祐, 地盤工学会北海道支部技術報告集, 44, 321, 330, 2004
  Japanese
• 繰返し載荷を受ける粒状体の体積変化特性に及ぼす粒子破砕の影響
  堀田大介; 三浦清一; 石川達也, 地盤工学会北海道支部技術報告集, 44, 253, 258, 2004
  Japanese
• せん断モードの異なる破砕性粒状体の強度―変形特性
  石川達也; 堀田大介; 三浦清一; 柏谷匡胤, 土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 1, 3, 011, 2004
  Japanese
• 繰返し載荷条件の違いが粒子破砕に及ぼす影響
  堀田大介; 三浦清一; 石川達也, 土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 1, 3, 012, 2004
  Japanese
• Effect of ballast thickness on deformation characteristics of ballasted track under train passage
  Sekine Etsuo; Ishikawa Tatsuya; Kono Akiko, Proceedings of the Japan National Conference on Geotechnical Engineering, 39, 0, 1069, 1070, 2004
  バラストと呼ばれる粒状材料,まくらぎ,レールから構成されるバラスト軌道は,列車の繰返し荷重によりバラスト部分に塑性変形が生じ,軌道の変形が基準値を超過した場合には補修を行っている。このため,効率的な軌道の維持管理を行うには,バラスト部分の変形特性を解明する必要がある。そこで,バラストの厚さが繰返し荷重による塑性変形に及ぼす影響を検討するため,車輪走行による軌道模型繰返し載荷試験等を行った。その結果,バラスト厚さの増加とともに塑性変形の進行速度は増加する傾向にあるが,進行速度にピークを迎える道床厚さがあることが示唆された。, The Japanese Geotechnical Society
• Shaking table tests of grouted ballast tracks in plane strain state
  Kono Akiko; Ishikawa Tatsuya; Sekine Etsuo; Murono Yoshitaka; Izumi Gou, Proceedings of the Japan National Conference on Geotechnical Engineering, 39, 0, 1769, 1770, 2004
  本報告では、L2地震動に対応した省力化軌道の耐震性能評価法の研究開発の一環として、平面ひずみ状態を仮定した模型省力化軌道(実軌道の横断面を模擬)の振動台試験を行い、CA注入層が水平加振時の動的応答特性に及ぼす影響について検討した。まず、模型バラスト軌道の振動台試験結果との比較検討により、CA注入層の有無により模型軌道の動的応答特性に差異が生じることを明かにした。次に、応答加速度と応答変位の観点から、CA注入層の設置条件の差異が模型省力化軌道の耐震性能に及ぼす影響を検討した。この結果、省力化軌道構造の耐震性能の向上には、道床表面の鋪装化とCA注入層厚の増加が効果的であることを明らかにした。, The Japanese Geotechnical Society
• Development of simple shear apparatus for coarse-grained materials and its performance evaluation
  Ishikawa Tatsuya; Hotta Daisuke; Kashiwaya Masatsugu; Miura Seiichi, Proceedings of the Japan National Conference on Geotechnical Engineering, 39, 0, 863, 864, 2004
  The effects of membrane penetration and size of specimen on the mechanical performance of coarse-grained materials are significant in element tests. In this study, "multiple ring shear apparatus" was developed as a simple shear apparatus for coarse-grained materials in order to reduce these effects. A series of multiple ring shear tests were performed on ballast, glass beads, volcanic soil and Toyoura sand. Comparing these results with experimental results obtained from torsional shear tests, the performance of the multiple ring shear apparatus and its applicability to shearing behavior of coarse-grained materials including crushable soil were discussed., The Japanese Geotechnical Society
• Effect of Moving Wheel Load on Cyclic Plastic Deformation of Railroad Ballast
  関根悦夫; 石川達也; 木幡行宏, 鉄道総研報告, 18, 3, 17, 22, 2004
  Japanese
• 9月26日発生の2003年十勝沖地震 緊急地盤災害調査速報
  地盤工学会2003年十勝沖地震 緊急地盤災害調査団; 石川 達也; 横濱 勝司, 土と基礎 = Soil mechanics and foundation engineering, 51, 12, 77, 81, 01 Dec. 2003
  地盤工学会, Japanese
• 車輪走行荷重下の鉄道軌道・路盤の変形挙動の検討
  関根悦夫; 桃谷尚嗣; 石川達也, 舗装, 38, 5, 17, 22, May 2003
  建設図書, Japanese
• 数理計画モデルによる軌道狂い最適保守計画の作成 (特集:軌道技術)
  三和 雅史; 河西 智史; 石川 達也, 鉄道総研報告, 17, 2, 35, 40, Feb. 2003
  研友社, Japanese
• 模型バラスト軌道の繰返し塑性変形挙動に及ぼす移動荷重の影響評価
  石川達也; 関根悦夫; 三浦清一; 中村貴久, 地盤工学会北海道支部技術報告集, 43, 263, 272, 2003
  Japanese
• 9月26日発生の2003年十勝沖地震緊急地盤災害調査速報
  三浦清一; 石川達也; 横浜勝司, 土と基礎, 51, 12, 77-81,1(1)-1(6), 2003
  Japanese
• Shaking table tests of ballasted tracks in plane strain state
  Ishikawa Tatsuya; Sekine Etsuo; Murono Yoshitaka, Proceedings of the Japan National Conference on Geotechnical Engineering, 38, 0, 1833, 1834, 2003
  This paper presents an experimental study to evaluate the validity of 2-dimensional approximation in examining the dynamic response of ballasted tracks subjected to horizontal vibrations. A series of shaking table tests were performed with a variety of model tracks in the plane strain state. Test results indicated that the difference in the shape and mass of model sleepers causes the different dynamic response of ballasted tracks. Moreover, to apply 2-dimensional dynamic response analysis to the aseisimic performance assessment of ballasted tracks, this paper proposed a method to interpret test results in the plane strain state as that in 3-dimensional state., The Japanese Geotechnical Society
• Strength and Deformation Characteristics of Artificial Crushed Stone by Melting and Solidifying of Waste Ashes
  Sekine Etsuo; Enomoto Hideaki; Muramoto Katsumi; Jiang GuanLu; Ishikawa Tatsuya, Proceedings of the Japan National Conference on Geotechnical Engineering, 38, 0, 675, 676, 2003
  近年,土構造物に使用する良質な自然砕石の入手が,環境問題に関する規制もあり,非常に困難となりつつある。一方,ごみ処理問題の解決策として,ごみ焼却灰の溶融固化技術が着目され,その適用が検討されている。そこで,地球環境への負荷低減に寄与するため,ごみ焼却灰を溶融固化して作製した人工砕石を,土構造物に適用することを目的として,大型三軸試験により強度・変形特性の検討を行った。検討の結果,自然砕石に劣らない強度・変形特性を有していることが確認された。なお,用いた人工砕石は,溶融固化したごみ焼却灰がガラス質とならないよう温度管理して作製したものである。, The Japanese Geotechnical Society
• Mathematical Programming Model Analyses for the Optimal Track Irregularity Maintenance Scheduling.
  三和雅史; 河西智司; 石川達也; 奥村陽一; 東川恒也, 鉄道総研報告, 17, 2, 35, 40, 2003
  Japanese
• 最適軌道保守計画作成のための0-1型全整数計画モデルの構築と解法(輸送・交通(1))
  三和 雅史; 石川 達也; 奥村 陽一; 大山 達雄, 日本オペレーションズ・リサーチ学会秋季研究発表会アブストラクト集, 2002, 114, 115, 11 Sep. 2002
  公益社団法人日本オペレーションズ・リサーチ学会, Japanese
• 不連続体解析手法を用いたバラスト道床の変形挙動の検討 (特集:軌道技術)
  石川 達也; 堀池 高広, 鉄道総研報告, 16, 4, 17, 22, Apr. 2002
  研友社, Japanese
• 単粒度砕石の振動台試験における加振力の伝達に関する検討
  石川達也; 関根悦夫; 室野剛隆, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002
• 移動荷重方式によるバラスト軌道の模型載荷試験
  関根悦夫; 石川達也; 清水裕太; 竹内康, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002
• Effects of the scale factor between prototypes and models on the dynamic response of single grained crushed stone in shaking table tests
  Ishikawa Tatsuya; Sekine Etsuo; Muramoto Katsumi; Murono Yoshitaka, Proceedings of the Japan National Conference on Geotechnical Engineering, 37, 0, 1819, 1820, 2002
  The Japanese Geotechnical Society
• Track Technology. A Study on Cyclic Plastic Deformation of Railroad Ballast by Discontinuous Analysis.
  石川達也; 堀池高広, 鉄道総研報告, 16, 4, 17, 22, 2002
  Japanese
• 最適軌道保守計画作成のための全整数型数理計画モデル分析(都市計画)
  三和 雅史; 石川 達也; 大山 達雄, 日本オペレーションズ・リサーチ学会春季研究発表会アブストラクト集, 2001, 86, 87, 01 May 2001
  公益社団法人日本オペレーションズ・リサーチ学会, Japanese
• Modeling the Transition of Track States for Track Maintenance Planning.
  三和雅史; 石川達也; 大山達雄, 土木計画学研究・講演集, 22,Pt.1, 467, 470, 1999
  Japanese
• Construction of a new track maintenance system [Volume on vertical irregularities].
  石川達也, 新線路, 52, 9, 28, 30, 1998
  Japanese
• Examination of safety for section of continuous inferior in woodedn sleeper by limited interval support model.
  内田雅夫; 石川達也; 三和雅史, 土木学会年次学術講演会講演概要集 第4部, 53rd, 918, 919, 1998
  Japanese
• Track maintenance method for tilting car operation on sharp curves
  Masao Uchida; Tatsuya Ishikawa; Hideyuki Takai; Eiji Yazawa; Masashi Miwa, Quarterly Report of RTRI (Railway Technical Research Institute) (Japan), 38, 4, 182, 191, 1997
• Study of lateral force limit formula of the intensive irregularity of alignment considering railway structure.
  内田雅夫; 三和雅史; 石川達也, 土木学会年次学術講演会講演概要集 第4部, 52nd, 700, 701, 1997
  Japanese
• New approach to the design of ballasted track ( part 1 ).
  内田雅夫; 石川達也; 三和雅史, 日本鉄道施設協会誌, 34, 1, 27, 30, 1996
  Japanese
• New approach to design of ballasted track. ( Last )
  内田雅夫; 石川達也; 三和雅史, 日本鉄道施設協会誌, 34, 2, 122, 125, 1996
  Japanese
• 道床バラスト部の左右方向の繰返し変形特性の実験的検討 (鉄道線路の構造特性<特集>)
  石川 達也; 内田 雅夫, 鉄道総研報告, 9, 4, p31, 36, Apr. 1995
  研友社, Japanese
• The Present Designing and Maintenance of Railroad Ballast in Ballasted Track
  須長誠; 石川達也; 名村明, 土と基礎, 43, 2, 10, 14, 01 Feb. 1995
  地盤工学会, Japanese
• The Newly Design Method of Ballasted Track Structure Considering Track Irregularity Growth.
  内田雅夫; 石川達也; 名村明; 高井秀之; 三和雅史, 鉄道総研報告, 9, 4, 37, 42, 1995
  Japanese
• Lateral Cyclic Deformation Characteristics of Railroad Ballast.
  石川達也; 内田雅夫, 鉄道総研報告, 9, 4, 31, 36, 1995
  Japanese
• Application of DDA(Discontinuous Deformation Analysis) to triaxial tests of railroad ballast.
  石川達也; 大西有三, 土質工学研究発表会発表講演集, 30th, 3-3, 2081, 2082, 1995
  Japanese
• Basic dynamics of track maintenance.(12).Deformation of plastic on ballast division.(1).
  石川達也, 日本鉄道施設協会誌, 33, 6, 427, 430, 1995
  Japanese
• Basic mechanics of the track maintenance. (14).Plastic deformation of the ballast portion.
  石川達也, 日本鉄道施設協会誌, 33, 7, 484, 487, 1995
  Japanese
• Engineering of Maintenance. Study on How to Quantify Cyclic Deformation Characteristics of Railroad Ballast.
  石川達也; 名村明; 堀池高広, 鉄道総研報告, 8, 11, p31, 36, Nov. 1994
  研友社, Japanese
• 道床部変形特性を考慮した非線形骨組構造解析
  石川達也; 名村明, 土木学会年次学術講演会講演概要集 第4部, 49th, 1994
• Research on ballast sinking.
  名村明; 石川達也; 堀池高広, 日本鉄道施設協会誌, 32, 1, 26, 29, 1994
  Japanese
• Deformation of railway ballast considering the properties of coarse grained granular materials. (Part 1).
  名村明; 石川達也, 土質工学研究発表会発表講演集, 29th, 3-3, 2083, 2084, 1994
  Japanese
• Deformation of railway ballast considering the properties of coarse grained granular materials. (Part 2).
  石川達也; 名村明, 土質工学研究発表会発表講演集, 29th, 3-3, 2085, 2086, 1994
  Japanese
• Basic dynamics of track maintenance.(1).Track burden force at the beginning of a course.(1).
  三浦重; 石川達也, 日本鉄道施設協会誌, 32, 7, 506, 509, 1994
  Japanese
• Basic mechanics of track maintenance.(2).Track bearing force.(2).
  石川達也, 日本鉄道施設協会誌, 32, 8, 562, 565, 1994
  Japanese
• Track Maintenance on Sharp Curves for Tilting Car Operation.
  内田雅夫; 長戸正二; 高井秀之; 石川達也, 日本機械学会交通・物流部門大会講演論文集, 3rd, Tetsudo Shinpojiumuhen, 85, 90, 1994
  Japanese
• 有道床軌道の弾塑性変位量の算定に関する一考察
  石川達也; 内田雅夫; 小倉英章, 土木学会年次学術講演会講演概要集 第4部, 48th, 1993
• Study on How to Quantify the Lateral Strength of Ballasted Track.
  石川達也; 内田雅夫; 小倉英章, 鉄道総研報告, 7, 8, 33, 40, 1993
  Japanese
• Deformation characteristic test of a ballasted track for both right side and left side directions.
  石川達也; 小倉英章, 日本鉄道施設協会誌, 31, 8, 555, 558, 1993
  Japanese
• Study on Estimation of Settlement of Ballasted Track.
  名村明; 石川達也; 三浦重; 内田雅夫; 堀池高広, 鉄道総研報告, 7, 10, 47, 54, 1993
  Japanese
• 不連続変形法(DDA)のバラスト軌道への適用に関する考察 (その1)
  石川達也; 内田雅夫, 土木学会年次学術講演会講演概要集 第4部, 47th, 1992
• 曲線部の軌道構造の決定手法に関する一考察
  内田雅夫; 小倉英章; 石川達也, 土木学会年次学術講演会講演概要集 第4部, 47th, 1992
• Analysis of deformation behaviour of soft ground improved by deep mixing method.
  KAMON MASASHI; AOKI KAZUO; ISHIKAWA TATSUYA, 土木学会関西支部年次学術講演会講演概要, 1987, III.21.1-III.21.2, Apr. 1987
  Japanese

• 交通地盤工学入門
  交通地盤工学入門編集委員会; 地盤工学会
  地盤工学会,丸善出版, Mar. 2025, 9784886444424, xii, 285p, Japanese
• 北海道の地盤と防災
  地盤工学会北海道支部, Sep. 2022
• 地震による地すべり災害－2018年北海道胆振東部地震
  北海道大学出版会, Sep. 2020
• 斜面の凍上対策の調査・設計マニュアル（案）
  地盤工学会北海道支部, Sep. 2016
• 2014年制定 舗装標準示方書
  土木学会, Oct. 2015
• Advances in Transportation Geotechnics II
  CRC Press, Aug. 2012
• 舗装工学ライブラリー6 積雪寒冷地の舗装
  土木学会, 2011
• 斜面の凍上被害と対策のガイドライン
  地盤工学会北海道支部, Mar. 2010
• 地盤材料試験の方法と解説 第8編 特殊土の試験
  地盤工学会, 2009
• 計算力学レクチャーシリーズ6不連続変形法（DDA）
  丸善, 2005

• 地盤解析学特論, 2024年, 修士課程, 工学院
• 大学院共通授業科目（教育プログラム）：One program for Global Goals, 2024年, 修士課程, 大学院共通科目
• 地盤解析学特論, 2024年, 博士後期課程, 工学院
• 土の力学Ⅰ, 2024年, 学士課程, 工学部
• 土質力学Ⅰ, 2024年, 学士課程, 工学部
• 技術者倫理学, 2024年, 学士課程, 工学部
• 道路工学, 2024年, 学士課程, 工学部
• 防災工学演習, 2024年, 学士課程, 工学部
• 道路交通工学, 2024年, 学士課程, 工学部
• 土質力学演習Ⅰ, 2024年, 学士課程, 工学部
• 寒地環境工学, 2024年, 学士課程, 工学部
• Climate Change, 2024年, 学士課程, 工学部
• 土木工学創成実験Ⅱ, 2024年, 学士課程, 工学部
• 土質力学演習Ⅱ, 2024年, 学士課程, 工学部

• JAPAN SOCIETY FOR NATURAL DISASTER SCIENCE
• （社）地盤工学会
• 岩の力学連合会
• ISSMGE
• （社）土木学会
• ISRM
• 日本地すべり学会
• IACM

• 交通地盤工学による設計思想の転換：今後50年を見据えた舗装土工一体型道路構造の開発
  科学研究費助成事業
  01 Apr. 2025 - 31 Mar. 2028
  石川 達也
  日本学術振興会, 基盤研究(B), 北海道大学, 25K01299
• Development of Structural Monitoring Technology for Eastern European Log-style Wooden Churches Using LED Marker Dynamic Displacement Observation
  Grants-in-Aid for Scientific Research
  01 Apr. 2021 - 31 Mar. 2025
  上北 恭史; 下田 一太; 花里 利一; 石川 達也; 新津 靖
  2022年2月にロシアによるウクライナ侵攻のために、当初計画で予定していたウクライナのポテリッチにある聖神降臨聖堂（Potelych-Tserkva of the Descent of the Holy Spirit）からモニタリングの対象地を変更し、ポーランド南東部にあるサノク郡(Sanok Country)に残る聖母マリア生誕教会（Church of the Nativity of the Blessed Virgin Mary in Rakowa ）で行うこととした。本研究チームは2023年7月に同教会においてモニタリング装置を設置し観測体制を整えた。本教会堂は東方正教会の教会堂として1779年頃に建設されたという。３つの内陣を備え1900年頃に西側正面部分に鐘楼を増築している。建物は西方を正面にして小高い丘の上に建つ。教会堂の周囲は林で東面、南面は牧草地の緩やかな斜面に連なっている。北面と西面は高さ10メートルほどの崖となり、西面にはTyawkaと称される川が南北に流れ、その流れによって作られた急な斜面となっている。教会堂は建設されてから大きな修理は行われていないが、1947年からローマンカトリックによって利用され、その後1970年代に新しい教会堂が建設されたため、本教会堂は空き家となっている。目視では教会堂本体に大きな劣化は見られないが、鐘楼は西側斜面に多少傾き、南東側土台に亀裂が見られることから、西側斜面の地盤沈下による変形を受けていると推測される。そのためモニタリングのLEDは教会堂内部の西側の入り口上部および反対側の東側祭壇の上部の2か所に設置し、デジタルカメラで計測を行うこととした。教会堂の変形は緩慢としているため毎時計測とし、温度、風速の計測データともにモバイル通信によるサーバー受信ができるシステムとして計測を開始した。
  
  
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), University of Tsukuba, 23K20996
• Development of a regional geo-disaster vulnerability assessment method based on a novel time-dependent immunity index reflecting the climate changes and its applications
  Grants-in-Aid for Scientific Research
  01 Apr. 2020 - 31 Mar. 2024
  安福 規之; 村上 哲; 笠間 清伸; 酒匂 一成; 所 哲也; 石川 達也; 川尻 峻三; 川村 志麻; 石藏 良平
  本研究では、気候変動災害脆弱地域と想定される九州と北海道の自然・人工斜面を対象として、１）経年的に変化する地盤災害に対する免疫性（災害免疫力）の工学的評価、２）降雨・融雪形態の変化や地震動と関連付けた地盤災害危険個所の抽出と危険度判定手法の高度化、３）降雨形態の変化を反映した実用的な土砂移動量と移動距離の算定手法の確立、４）適応策整備順位とその効果の客観化、経年変化の時間軸を導入した地盤災害脆弱性マップの事例作成をめざしている。当該年度の研究実績を以下に示す。
  １）については、災害免疫力を経年的に変化する災害抵抗力と社会的リスクの積として表現し、切土のり面の経年変化を反映した災害抵抗力の評価手法とその適用事例を示した。また、九州地域における降雨や地盤情報のデータベース化と過去の福岡県管理道路の豪雨災害事例の収集整理を行い、新たに導入した雨量超過比による豪雨履歴と被災の関係を明らかにした。
  ２）と３）に関しては、短期雨量指標と土壌雨量指数を用いて土砂災害発生危険基準線（CL）について福岡県の情報を収集し、地盤・地形・地質特性および 降雨情報などとの関係について機械学習を使って分析を行い、影響指標を具体化した。同様の取り組みを北海道でも実施し、雨慣れの影響を精査し、地域性について分析した。また、河川堤防において、高浸透外力下でパイピング破壊リスクが高まる基礎地盤条件を精査し、平均動水勾配の時間変化に着目した破壊リスク算定モデルを提案した。さらに、北海道において降雨後に地震動を受ける火山灰盛土の斜面崩壊機構を調査・分析し、その履歴順番の違いが崩壊に及ぼす影響を考察した。加えて、地震後の道路盛土の耐津波抵抗性を精緻な大型模型実験を通して分析した。
  ４）に関しては、地域性を反映した地盤災害脆弱性の定義と適応枠組みを新たに提示し、斜面崩壊事例に基づいた地域減災力評価指標を提案した。
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Kyushu University, 20H00266
• 表層凍結斜面崩壊メカニズムの地盤工学的解析に基づく東欧校倉木造教会堂保存の研究
  Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
  07 Oct. 2019 - 31 Mar. 2023
  上北 恭史; 藤田 香織; マルティネス アレハンドロ; 石川 達也
  本研究は東欧に残る校倉造木造教会堂の保存のために、その主な損傷を引き起こしていると思われる凍土の凍結融解による斜面崩壊のメカニズムを明らかにし、不同沈下や地すべりがもたらす木造教会堂の損傷およびその対策について研究をすることを目的にしている。そのため木造教会堂の建つ地盤にボーリングによる土壌解析や観測井を用いたモニタリング計測を行い、凍結融解作用による斜面崩壊の過程を地盤工学的に明らかにし、木造教会堂の保存対策や修理方針の策定を検討していく。
  モニタリングを行う木造教会堂は、ウクライナ西部のlviv県に位置するポテリッチの聖神降臨聖堂(Potelych-Tserkva of the Descent of the Holy Spirit)を候補とした。この教会堂は16世紀初頭に建設され、ハリキ(Halych)様式と呼ばれる東側のアプスと中央部礼拝室上に塔をもつ古い形式で、ポーランドとウクライナの世界遺産「ポーランドとウクライナのカルバティア地方の木造教会群」の構成資産のうちのひとつである。この教会堂は科学研究費基盤研究B「ウクライナ木造教会堂群保存手法の構築－日欧校倉造修理工法の比較議論を通して」(16H04483)で調査を行い、地すべりによる不同沈下のために躯体中央部に亀裂を発生させており、校倉構造全体に歪を生じさせていることを把握した。そして教会堂内部にフレームを新たに組んで補強していることを確認している。これらの応急修理を担当したリヴィウ工科大学および本研究の共同研究者のキエフ建設大学の助言により、本教会堂をモニタリング実施を行う候補とした。
  モニタリングを2020年度から開始するためにリヴィウ工科大学にボーリング掘削と土壌解析を依頼することとした。この土壌解析の成果に基づいて多段傾斜計等のセンサーの設置およびデータ収集のためのデータロガーの設置を検討している。
  Japan Society for the Promotion of Science, Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), University of Tsukuba, 19KK0111
• 粗粒材の長期劣化を考慮した新たな交通施設の維持管理方法：経験知から科学知の保守へ
  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
  01 Apr. 2019 - 31 Mar. 2023
  早野 公敏; 石川 達也; 桃谷 尚嗣; 中村 貴久
  鉄道・道路施設では道床材，路盤材として砕石を主体とする粗粒材を広く使用している．これまでの研究で敷設後20年以上のバラスト軌道，供用30年以上のアスファルト舗装において交通荷重の繰返しによる破砕・細粒化が生じている．細粒化が進行すると雨水浸透に伴う沈下が頻発しさらには脱線や陥没のリスクが高まる．近年では降雨特徴の変化により突発的に変状が生じるケースが増加し，これらの予防や維持管理コストの最小化のためには道床・路盤材の交換や改良のタイミングの適切な判断が重要となる．また，災害後の早期復旧に破砕・細粒化が生じた道床・路盤材の再利用を求める場合もある．しかし現状では細粒化後の供用性予測の不確実性は高く，降雨後に沈下が頻発する現象や災害発生などに基づいて事後に経験的に判断することが多い．そこで本研究では破砕・細粒化した道床・路盤材の雨水浸透に伴う沈下特性や支持力特性を解明し，交換や改良の適切なタイミング・効果を科学的に評価できる新たな維持管理体系を構築することを行った．
  具体的に2019年度は，室内要素試験および室内模型実験を主として実施し，経年劣化による細粒分増加が道床材の締固め特性，透水特性，繰返し変形特性，支持力特性に及ぼす影響を調査した．まず，経年劣化により破砕・細粒化した道床材の締固め試験を行い，細粒化の程度による締固め曲線の違いを明らかにした．次に道床材の透水性・繰返し変形特性に与える道床材細粒化の影響を透水試験・三軸試験により評価した．続いて室内模型実験により道床の支持力特性に破砕・細粒化が及ぼす影響を調べ，室内要素試験結果による評価結果との整合性について検討を行った．
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Yokohama National University, 19H02234
• Development of risk assessment method for heavy rainfall induced disaster under climate change considering rainfall habituation in high latitude cold regions
  Grants-in-Aid for Scientific Research
  29 Jun. 2018 - 31 Mar. 2021
  Ishikawa Tatsuya
  In order to develop a highly versatile slope disaster risk assessment method that predicts through rainfall habituation, which is an index of geodisaster resistance, this study discussed (a) proposal of rainfall habituation index for soil ground, (b) establishment of a method for investigating the degree of rainfall habituation, and (c) construction of a method for evaluating the risk of heavy rain induced geodisasters by considering rainfall habituation. As a result, in order to examine the potential risk of a geodisaster which is expected to occur when high-latitude cold regions with little heavy rainfall, such as Hokkaido and Tohoku in Japan, experience torrential rains due to climate change based on case studies of geodisasters that have occurred in the past in warm regions, this study proposed a method that can examine predicting the occurrence of slope disasters and assessing risks in a unified manner for various regions with different rainfall histories.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 18K18915
• Development of the prevention technology of the permeable deterioration in frozen ground, non-frozen ground border of the frozen ground method water shielding wall
  Grants-in-Aid for Scientific Research
  01 Apr. 2017 - 31 Mar. 2020
  Ito Yuzuru
  The frozen earth wall of the Fukushima Nuclear Power Plant prevents an inflow of the groundwater to the nuclear reactor building and prevents increase of the contaminated water.It is assumed that the earth wall is maintained for a long term. Then a horizontal shrinkage crack by de-hydration due to frost heave occurs in front of the ice lens, and it was assumed that the extremely great increase in hydraulic conductivity might generate in front of the frozen earth wall.
  To confirm this hypothesis and to propose the preventive measure to this phenomenon, we developed the experimental device which could freeze-thaw the specimen horizontally and conduct permeability test vertically. The test result shows that even if a frost front remained at the constant position, a change of the void structure continued with time regardless of the frost-susceptibility of the fine-grained soil, and it was considered that the possibility that water shield of the earth wall was spoiled may be increasing.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Setsunan University, 17H03307
• Wide-area risk assessment of cold-regions geodisasters under climate change by multi-physical and multi-scale analysis
  Grants-in-Aid for Scientific Research
  01 Apr. 2016 - 31 Mar. 2020
  ISHIKAWA Tatsuya
  High-latitude zone like Hokkaido is an important region where it is expected to benefit and develop from global warming in future, while it is also expected that new types of geotechnical disasters, which never experienced before, will occur due to climate change. Therefore, in this study, we have constructed a theoretical system that reasonably explains the geotechnical disasters peculiar to snowy cold regions, which are different from the geotechnical disasters observed in warm regions, from the viewpoint of multiphysics (multiphase mechanics) and space-time multiscale by considering the interaction between thermal / hydraulic boundary condition changes and mechanical behavior in the normal to low temperature range. In addition, by using this theoretical system, we have proposed a hierarchical methodology that can evaluate the wide-area risk of geotechnical disasters in high-latitude cold regions occurred under near future weather conditions supposed by the climate change prediction.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 16H02360
• Comprehensive study on the 2018 Hokkaido Eastern Iburi Earthquake and its disaster
  Grants-in-Aid for Scientific Research
  04 Oct. 2018 - 31 Mar. 2019
  Takahashi Hiroaki
  Comprehensive investigation on the 2018 Hokkaido Eastern Iburi earthquake and its disaster was conducted. Mainshock rupture initiated at deepest part and major slip was occurred in 20-30km deep. Multiple simultaneous landslides in Atsuma town was induced by combination of strong ground shaking and weak sliding layer between pyroclastic fall deposit layers. Halloysite cray minerals was discovered in all sliding layers. Simulation suggested landslides might attack residential houses within 6 seconds. Observed peak ground motions in nearby area were larger than common distance attenuation model. Severe wooden house damage in Mukawa town was due to amplified seismic waves due to site effects. Sounding and boring investigation revealed filled low-density volcanic ash and higher groundwater level in liquefaction area. Electricity blackout caused severe damage in social and economic activities of Hokkaido. These scientific outcomes were explained to residents at public briefing session.
  Japan Society for the Promotion of Science, Grant-in-Aid for Special Purposes, Hokkaido University, 18K19952
• Development of new design method for countermeasure against frost heave aimed at life extension of pavement
  Grants-in-Aid for Scientific Research
  01 Apr. 2015 - 31 Mar. 2018
  Kawabata Shinichiro
  In this research, we compile data on frost heave and associated damage to roadways, consider additional parameters for roadway design, and examine new methods of assessment. Specifically, we investigate pavement surface conditions over a total of 800 km of roadway and use the data to find the relation among type of earthwork (cut or fill), freezing index, and damage from frost heave damage. Additionally, we examined 51 types of subgrade soil sampled at heaved locations. The results elucidate the regional characteristics of the freezing index at 323 points throughout Japan. For comparison, we reviewed more than 100 years of weather data, using it to reveal long-term fluctuations in the freezing index. Finally, we show that differences in how pavement is visually inspected affects the accuracy of the resulting assessments.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University of Science, 15K06214
• Modeling of surface flow and infiltration branching characteristics due to snow melting and rainfall considering snow cover and vegetation change
  Grants-in-Aid for Scientific Research
  01 Apr. 2015 - 31 Mar. 2018
  ISHIKAWA Tatsuya
  In Hokkaido, fluctuations in the water retention and infiltration characteristics of soil ground due to the seasonal variation of land use and weather condition are extremely large throughout the year, so there is a possibility that it may enhance the occurrence of sediment-related disasters at torrential downpours caused by climate change. This study proposed a quantification method of the infiltration rate of rainfall / snow melting water, which can be a criterion for the occurrence of sediment-related disasters, from the viewpoints of snow cover / vegetation, rainfall intensity / snow melting rate, soil property, water content of the ground and frozen state. In addition, this study developed a coupled slope stability analysis for snowy cold regions by incorporating a newly proposed mathematical model for the infiltration characteristics of surface flow in the case where snow cover and vegetation are considered as an element in numerical analysis.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 15K14026
• Study on long-term stable management of frozen earth wall considering freeze-thaw problem.
  Grants-in-Aid for Scientific Research
  01 Apr. 2014 - 31 Mar. 2017
  ITO Yuzuru
  In Fukushima 1st Nuclear Power Plant, the ice wall was planned to build over the ground with sandy soil and mud stone layers, in which a large quantity of ground water was flowing toward the Pacific Ocean. Therefore, many questions arise whether the ice wall can be completed, whether the frozen ground has small enough permeability and what will happen when frozen soil melts due to power supply lost.
  As a result of the research, the following conclusion was obtained.(1) A prediction of limited ground water speed in the ice wall construction by the numerical computation accorded with the theoretical value, and, furthermore, they agreed with the result of the model experiment. (2) The experiment method that had high precision to measure a permeability of the frozen ground was developed. (3) A method to estimate the permeability of freeze-thawed soil was developed by the newly designed horizontal displacement restricted freeze-thaw test system.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Setsunan University, 26289156
• Damage risk assessment of buried pipes in cold regions
  Grants-in-Aid for Scientific Research
  01 Apr. 2014 - 31 Mar. 2017
  KAWAGUCHI Takayuki
  This study measured detailed temperature distribution around buried pipes under the pavement and vertical stresses in the ground, as well as seasonal changes of incremental stress exerted by vehicle wheel loads for damage risk assessment of buried pipes beneath pavements in cold regions.
  Results revealed that these measured values change significantly as a result of the ground’s freeze-thaw process. In addition, we found that the incremental stress in the ground increases with the vehicle weight and that the rate of increase changes with freezing and thawing. The stress distribution (transmission) in the ground was also found to change with freezing and thawing.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 26420476
• Development of analytical procedure using phenomenalistic mathematical model for phase change-dependent geotechnical hazards in snowy cold regions
  Grants-in-Aid for Scientific Research
  01 Apr. 2012 - 31 Mar. 2015
  ISHIKAWA Tatsuya; KIMURA Ichiro
  This research develops an analytical procedure using a phenomenalistic mathematical model for the phase change-dependent geotechnical hazards in snowy cold regions by performing experimental and analytical studies. First, we established a new testing method for model tests on soil grounds subjected to freeze-thaw actions and seepage flow, and revealed that seepage pressure and frost-susceptibility and water retention-permeability characteristics of geomaterials seriously influenced the seepage erosion behavior of freeze-thawed soil ground. Next, we developed a numerical model to simulate this seepage erosion phenomenon with the framework of hydraulic erosion and overhanging failure by a triple-grid approach. Since the numerical results showed a good agreement with the experimental results, we concluded that the newly proposed analytical procedure is applicable to a freeze-thaw and seepage-erosion complex geotechnical hazards, which may occur in the snowy cold regions.
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 24651204
• A study on systematization of new geotechnical hazards in snowy cold regions caused by climate change and its hazard assessment
  Grants-in-Aid for Scientific Research
  01 Apr. 2011 - 31 Mar. 2015
  ISHIKAWA Tatsuya; MIURA Seiichi; YAMASHITA Satoshi; KAWABATA Shinichiro; KAWAGUCHI Takayuki; TOKORO Tetsuya; KITAMURA Ryosuke; KIMURA Ichiro; NISHIMOTO Satoshi
  This research mainly studies the systematization of new geotechnical hazards in snowy cold regions caused by climate change and its long-term hazard assessment by performing laboratory element tests, model tests, numerical simulations, and data analysis. As the results, this research clarified a failure mechanism of freeze-thawed slope subjected to a large amount of infiltration in a short time due to torrential rainfall and rapid snow melting, and its influential factors by establishing new laboratory element tests and model tests on unsaturated geomaterials subjected to freeze-thaw actions and seepage erosion, and developing a new analytical procedure using coupled thermo-hydro-mechanical FE analysis. Furthermore, we proposed an assessment method for a new type of freeze-thaw and seepage-erosion complex geotechnical hazards, which may occur in the snowy cold regions, by predicting climate change in the near future based on data analysis of temperature data for past some decades.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, Competitive research funding, 23360201
• Stability evaluation of volcanic slopes in cold regions
  Grants-in-Aid for Scientific Research
  01 Apr. 2011 - 31 Mar. 2014
  MIURA SEIICHI; ISHIKAWA Tatsuya; KAWAMURA Shima; YOKOHAMA Shoji
  The aim of this study is to reveal the failure mechanism of volcanic slopes in cold regions and to propose a prediction method on failure. To achieve the purposes, full-scale embankments were constructed under several conditions in Sapporo, Japan. A typical volcanic soil in the field was adopted as a soil material. After construction of embankments, changes in soil moisture, temperature, pore water pressure were investigated using devices such as soil moisture meters, etc. Simultaneously, a series of model tests was performed on small size slopes formed by the same material as that in the field to compare with the mechanical behavior of embankments. A series of triaxial tests was also conducted on compacted volcanic soils subjected to freeze-thaw cycles using a new apparatus. As a result, a reasonable prediction method of failure was proposed based on changes in water content, and its validity was confirmed.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 23241056
• Study on the applicability to the reinforced soil retaining wall of L-shaped drainage using Geosynthetics
  Grants-in-Aid for Scientific Research
  2010 - 2012
  SHIBUYA Satoru; KAWAGUCHI Takayuki; TORII Nobuyuki
  In order to examine the applicability of L-shaped drainage method in in-situ in this study, the full-scale model test was performed. As a result, the excellent effect on the applicability to the reinforced soil retaining wall of L-shaped drainage using Geosynthetics in this research could be evaluated.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Kobe University, Coinvestigator not use grants, Competitive research funding, 22241045
• 凍結融解地盤の温度依存型透気係数推定方法の提案
  平成２２年度北海道ガス大学助成制度
  Apr. 2010 - Mar. 2011
  石川 達也
  北海道ガス, Principal investigator, Competitive research funding
• 凍結融解地盤の温度依存型透気試験方法の開発
  平成２１年度北海道ガス大学助成制度
  Apr. 2009 - Mar. 2010
  石川 達也
  北海道ガス, Principal investigator, Competitive research funding
• 凍結融解作用を受ける斜面の崩壊予知・災害危険度評価システムの確立
  道路政策の質の向上に資する技術研究開発
  Apr. 2007 - Mar. 2010
  三浦 清一
  国土交通省, Competitive research funding
• ガス滞留層上の凍結融解地盤の温度依存型透気性評価・試験方法に関する研究
  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
  2009 - 2010
  石川 達也; 山下 聡
  1.凍結時および融解時の不飽和地盤の透気係数を計測・評価するため、凍上性・非凍上性地盤材料(火山灰質土と豊浦砂)の凍結融解不飽和透気試験を室内及び屋外で実施した。その結果、以下のような知見が得られた。(1)試験時の含水比が透気係数に及ぼす影響は土質によって異なり、火山灰質土では、飽和度60%以下では飽和度の上昇に伴い透気係数が高くなるというという豊浦砂と逆の傾向が得られた。これは、締固め時の含水比変化に伴う土の骨格構造の変化に起因すると考えられ、締固め含水比を土質に応じて変えることで、地盤材料の透気性を制御できる可能性がある。(2)凍上性火山灰質土においても、非凍上性の豊浦砂と同様、地温0℃付近で透気係数は大きく変化した。しかしながら、同一飽和度(空気間隙比)で透気係数を比較した場合、豊浦砂では凍土の透気係数は未凍土よりも若干低くなったが、火山灰質土では、地温の低下に伴い透気係数は上昇した。また、凍上時の火山灰質土の透気係数は非凍上時よりも高くなった。これらは、両者の含水比の違いによる未凍結時の土壌水分挙動、土の骨格構造及び間隙水の氷結様式の違いに起因すると考えられる。(3)凍上性火山灰質土では、凍結融解が繰り返され飽和度が一定値以上に増加すると間隙水の増加により空気は透り難くなり、加えた水分の凍結・凍上によりさらに透気係数は低下する傾向が確認された。
  2.開発した透気試験方法によれば、不飽和状態で繰返し凍結融解作用を受ける凍上・非凍上性地盤材料の温度依存型透気係数の評価が可能であること、および不飽和地盤の透気係数は、温度依存性を示すとともに、地盤材料の凍上性、保水性・透水性、締固め特性の影響を多大に受けることが明らかになった。積雪寒冷地で地盤の透気性を検討する場合、これらの要因を考慮することが精確な挙動予測に重要となる。
  Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 21651080
• Sophistication of evaluation method for the long-term performance of granular base course subjected to freeze-thaw history in cold regions
  Grants-in-Aid for Scientific Research
  2008 - 2010
  ISHIKAWA Tatsuya; MIURA Seiichi; YOKOHAMA Shouji; KAMEYAMA Shuichi; YAMASHITA Satoshi; ONO Takashi; ABE Ryuji; SEKINE Etsuo; HACHIYA Yoshitaka
  In this study, we proposed new testing methods for the evaluation of the deformation-strength characteristics of base course materials subjected to freeze-thaw action, and examined the mechanical behavior of granular base before and after freeze-thawing and under freezing. We also evaluated the influences of the change in the performance of granular base due to freeze-thawing on the fatigue breaking of pavements in cold regions by applying the theoretical design method for asphalt pavement. As the result, it was revealed that the freeze-thawing of granular base has a strong influence on the fatigue life of pavement structure in cold regions because it varies the deformation-strength characteristics of base course materials.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, Competitive research funding, 20360206
• Establishment of the system for the risk evaluation of geohazards at volcanic soil slope in cold regions
  Grants-in-Aid for Scientific Research
  2007 - 2009
  MIURA Seiichi; AKAGAWA Satoshi; ISHIKAWA Tatsuya; YOKOHAMA Shoji; KAWAMURA Shima; IWAHANA Go; ITOU Yoshihiko; NISHIMOTO Satoshi
  We elucidated the interaction between various factors which caused subsurface failure of volcanic soil ground subjected to freeze-thaw action in cold regions in terms of soil mechanics, and we proposed a new simple prediction method for the rain-induced slope failure in snow-melting seasons in consideration of the degradation of deformation-strength characteristics of geomaterials due to freeze-thawing. We also developed a geo-information database which integrated the various different kinds of information such as weather reports, geotechnical information, and records for past geohazards. Based on these achievements, finally, we developed the system which could evaluate a risk of rain-induced slope failure at subsurface layers suffered from freeze-thaw by using both above-mentioned prediction method and geo-information database.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 19201035
• 寒冷地用舗装構造の路盤・路床の変形挙動評価試験法に関する研究
  平成１９年度北海道ガス大学助成制度
  Apr. 2007 - Mar. 2008
  石川 達也
  北海道ガス, Principal investigator, Competitive research funding
• Study on Elucidation and Prediction of Mechanical Behavior of Saturated/Unsaturated Granular Base Subjected to Cyclic Moving Loads.
  Grants-in-Aid for Scientific Research
  2006 - 2007
  ISHIKAWA Tatsuya; MIURA Seiichi; YOKOHAMA Shoji; SEKINE Etsuo
  This study examines the mechanical behavior of granular materials under saturated and unsaturated conditions subjected to cyclic moving loads, for example gravel roadbed and railroad ballast, and both a new testing methods and new analytical procedure to examine the effects of the rotation of principal stress axes and water content on cyclic plastic deformation of granular base course materials are proposed. The following conclusions can be obtained;
  1. Two types of small scale model tests which adopted a fixed-place loading method and a moving loading method were performed with a base course material under air-dried condition and saturated condition. As the results, it was revealed that the water content of the base course material influences the mechanical behavior of granular base strongly, and the effect on the development of residual settlement for granular base under cyclic loading remarkably comes to the surface in employing moving loads.
  2. Two types of multi-ring shear tests, which can consider a change in direction of principal stresses like traffic loads, were performed in the same way as loading methods in small scale model tests. As the results, it was revealed that the shear strength decreased and the cumulative residual strain increased due to the saturation, and that the mechanical behavior in multi-ring shear tests is very similar to that in small scale model tests, regardless of loading methods and water contents.
  3. A new method to estimate cyclic plastic deformation of granular base under repeated wheel traveling in terms of the strength and deformation characteristics of granular base course materials was proposed. The simple analytical procedure with linear elastic FE analysis considering the cumulative strain derived from multi-ring shear test results of base course materials can roughly estimate the residual settlement of granular base under saturated and unsaturated conditions subjected to cyclic moving loads.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 18560479
• Slope failure mechanism for crushable volcanic soi I at snowy cold region and its modeling
  Grants-in-Aid for Scientific Research
  2004 - 2006
  MIURA Seiichi; AKAGAWA Satoshi; ISHIKAWA Tatsuya; YOKOHAMA Shoji; KAWAMURA Shima
  Based on the experimental and numerical studies of slope stability of crushable soils, the following conclusions are obtained:
  1.Effect of freeze-thaw sequence on static mechanical behavior of volcanic soil
  (1)Particle breakage of volcanic coarse-grained soil significantly occurs due to the repetition of freeze-thaw sequence. The particle breakage affects strongly on static strength and rigidity of volcanic soil.
  (2)Volcanic soil subjected to freeze-thaw sequences may produce a remarkable crushability at low confining pressure level. This fact suggests that deterioration in the stability of slope near the surface is significant on snowy cold region.
  2.Effect of freeze-thaw sequence on dynamic mechanical behavior of volcanic soil
  (1)Shear modulus of volcanic coarse-grained soil decreases due to freeze-thaw sequences. On the other hand, freeze-thaw action may less affect hysteresis damping ratio.
  (2)Liquefaction resistance of volcanic soil decreased due to freeze-thaw sequences. This fact may attribute the reduction of the liquefaction resistance to the increase in finer content induced by particle breakage during freeze-thaw sequences.
  3.Rainfall-induced slope collapse for crushable volcanic soil and its evaluation
  (1)From the results of model tests, it is found that excess pore water pressure and saturation degree play a key role in the slope failure induced by rainfall.
  (2)Depth and shape of impermeable layer in the slope are critical to estimate the stability of slope.
  4.Numerical analysis for rainfall-induced slope failure for crushable volcanic soil
  (1)A series of numerical analysis by DEM showed that proposed small void elements between soil particles, which are able to expand in accordance with temperature depression, can simulate the mechanical freeze-thaw performance of granular materials.
  (2)Discontinuous Deformation Analysis (DDA) could explain the slope failure mechanism if rainfall and dilatancy effects on volcanic soil are estimated appropriately into analysis algorithm.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 16310121
• Development of Element tests for elucidating mechanical behavior of granular materials subjected to cyclic moving loads
  Grants-in-Aid for Scientific Research
  2003 - 2004
  ISHIKAWA Tatsuya; MIURA Seiichi; YOKOHAMA Shoji; SEKINE Etsuo
  This study examines the mechanical behavior of granular materials subjected to cyclic moving loads, for example gravel roadbed and railroad ballast, and both a new testing method and new analytical procedures to examine the effects of the rotation of principal stress axes on cyclic plastic deformation of granular materials are proposed. The following conclusions can be obtained ;
  1.Cyclic plastic deformation obtained through moving loading tests is much larger than those obtained through fixed-place cyclic loading tests when other experimental conditions are the same. Accordingly, the difference in loading methods has a significant influence on the cyclic plastic deformation of granular materials.
  2.Residual strain obtained through cyclic loading triaxial tests with constant amplitude of deviator stress while controlling confining pressure constant is very small compared with the macro residual strain calculated from force-displacement relationships in moving loading tests, while that of cyclic torsional simple shear tests using a newly developed "Multi-ring shear apparatus" is almost equivalent to moving loading tests. Therefore, the multi-ring shear test is appropriate for an element test to simulate the actual stress states inside substructures under traffic loads. Moreover, it was revealed that the rotation of principal stress axes has a significant effect on cyclic deformation characteristics of granular materials.
  3.Two analytical procedures for simulating the mechanical behavior of granular materials subjected to cyclic moving loads were proposed. One is linear elastic FE analysis considering the material properties of cumulative strain derived from element test results of granular materials, which can roughly estimate the residual settlement of granular substructures due to cyclic loading. The other is discontinuous analysis which elements imitate the shape of real gram particles well because it was revealed that the element shape is one of the dominant factors to determine the mechanical behavior of granular assemblage in discontinuous analysis.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), HOKKAIDO UNIVERSITY, Principal investigator, Competitive research funding, 15560420
• 凍結融解地盤の性能評価・挙動予測技術の開発
  2004
  Competitive research funding
• 粒状構造物の力学的安定性に関する研究
  2002
  Competitive research funding
• Study on dynamic stability characteristics of granular materials
  2002
  Competitive research funding