研究者データベース

西村 聡(ニシムラ サトシ)
工学研究院 土木工学部門 社会基盤マネジメント
准教授

基本情報

所属

  • 工学研究院 土木工学部門 社会基盤マネジメント

職名

  • 准教授

学位

  • PhD(Imperial College London)

ホームページURL

J-Global ID

研究キーワード

  • 土質室内試験   土構造物   地盤凍結   粘性土特性   地盤改良   地盤変形・破壊   

研究分野

  • 社会基盤(土木・建築・防災) / 地盤工学

職歴

  • 2010年10月 - 現在 北海道大学 大学院工学研究院 准教授
  • 2007年09月 - 2010年09月 独立行政法人港湾空港技術研究所 地盤・構造部 研究官
  • 2006年01月 - 2007年08月 英国Imperial College London Department of Civil and Environmental Engineering Research Associate
  • 2002年09月 - 2006年01月 英国Imperial College London Department of Civil and Environmental Engineering Research Assistant

学歴

  • 2002年09月 - 2006年01月   Imperial College London   Department of Civil and Environmental Engineering, PhD
  • 2001年04月 - 2002年09月   東京大学   大学院工学系研究科   社会基盤学専攻, MEng
  • 1997年04月 - 2001年03月   東京大学   工学部   土木工学科 BEng

研究活動情報

論文

  • Evaluation of effect of liquefaction resistance by means of compaction grouting using effective stress analysis
    Takano, D, Takahashi, H, Mirokawa, Y, Nishimura, S
    Paper accepted to 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Taipei 2019年 [査読無し][通常論文]
  • Describing temperature and confining stress effects on frozen soils within THM framework
    Nishimura, S, Wang, J
    Paper accepted to 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Taipei 2019年 [査読無し][通常論文]
  • Small-strain deformation behaviour of a clay at frozen and unfrozen states: A comparative study
    Nishimura, S, Wang, J, Okajima, S, Joshi, B. R
    Abstract accepted to 7th International Symposium on Deformation Characteristics of Geomaterials, Glasgow 2019年 [査読無し][通常論文]
  • Long- and short-term pore water pressure variations in sandy river dike interpreted with 1- and 2-phase seepage flow analysis
    Nishiie, S, Nishimura, S, Yamazoe, N
    Abstract accepted to 7th Asia-Pacific Conference on Unsaturated Soils, Nagoya 2019年 [査読無し][通常論文]
  • Change of states during repeated freeze-thaw cycles in clay
    Joshi, B. R, Nishimura, S, Wang, J
    Proceedings of the 7th China-Japan Geotechnical Symposium, Sanya 110 - 116 2018年 [査読無し][通常論文]
  • Field response of an instrumented dyke subjected to rainfall
    Jotisankasa, A, Pramusandi, S, Nishimura, S, Chaiprakaikeow, S
    Geotechnical Engineering Journal of the SEAGS & AGSSEA 50 1 2018年 [査読無し][通常論文]
  • Nishimura, S, Wang, J
    Geotechnique AoP 2018年 [査読無し][通常論文]
  • Toda, K, Sato, H, Weerakoon, N, Otake, T, Nishimura, S, Sato, T
    Minerals 8 5 174  2018年 [査読無し][通常論文]
  • Weerakoon, N, Nishimura, S, Sato, H, Toda, K, Sato, T, Arai, Y
    Ground Improvement AoP 2018年 [査読無し][通常論文]
  • Wang, J, Nishimura, S, Joshi, B. R, Okajima, S
    Geotechnique AoP 2018年 [査読無し][通常論文]
  • Sopheap Por, Satoshi Nishimura, Suched Likitlersuang
    APPLIED CLAY SCIENCE 146 316 - 324 2017年09月 [査読無し][通常論文]
     
    This study presents an investigation of the effects of cement addition to expansive clay on its deformation characteristics and stress responses during swelling. The effects were evaluated by focusing on the unconfined compressive strength, swelling-shrinkage strains under various conditions, and the lateral coefficient of earth pressure during one-dimensional deformation for artificial mixtures of two different clays at three different ratios. The clays used in this study were a Na-montmorillonite bentonite and a non-expansive Bangkok clay, mixed at different proportions to simulate naturally encountered expansive clays with different degrees of swelling potential. The experimental programme involved unconfined compression, areal shrinkage strain by unconfined drying, vertical free swelling strain, and confined swelling pressure tests. The experimental results show that the cement addition led to marked decreases in the areal shrinkage strain and vertical free swelling strain in addition to the obvious improvement of strength and stiffness of soils. The confined swelling pressure test results indicated that the cement had a greater effect in reducing vertical swelling pressure than the lateral swelling pressure of the soils during one-dimensional swelling. The measured lateral coefficient of earth pressure and stress paths of untreated and cement-treated soils and their engineering implications are discussed.
  • A. M. Brosse, R. J. Jardine, S. Nishimura
    GEOTECHNIQUE 67 8 653 - 671 2017年08月 [査読無し][通常論文]
     
    The shear strength of heavily overconsolidated, stiff-to-hard plastic clays is crucial to their stability and also influential on the ground movements they develop in many geotechnical engineering applications. This paper considers the shear strength anisotropy of the London, Gault, Kimmeridge and Oxford clays through advanced hollow cylinder experiments on multiple high-quality samples taken at similar depths from inland sites where the geotechnical profiles have been established by comprehensive laboratory and in situ testing. Suites of undrained tests are reported, which loaded specimens from their in situ stress states to reach ultimate failure at pre-defined final major principal stress axis orientations defined in the vertical plane, while also controlling or monitoring the intermediate principal stress ratio, b. Both stress path and simple shear tests were undertaken with the hollow cylinder apparatus, which offers key advantages over conventional simple shear equipment. The interpretation reveals patterns of marked shear strength anisotropy that impact significantly on numerous geotechnical engineering applications.
  • Jinyuan Wang, Satoshi Nishimura, Tetsuya Tokoro
    SOILS AND FOUNDATIONS 57 2 194 - 210 2017年04月 [査読無し][通常論文]
     
    Towards the development of a mechanical model that can be part of multi-physical analysis of frozen soils, a program of systematic frozen-unfrozen parallel triaxial tests at different temperatures and strain rates was conducted. The mechanical behavior of the reconstituted high-plasticity clay samples was investigated and interpreted through a state concept based on Ladanyi and Morel's (1990) postulate on the unique relationship between the inter-particle "effective" stress and the strain path. The Critical State Lines (CSLs) for clay specimens frozen undrained were mapped by referring to the shear behavior of unfrozen specimens sharing the same strain history. With other conditions set identical, the shear strength linearly increased with a decrease in the temperature for the range from -10 degrees C to -2 degrees C, and log-linearly increased with an increase in the strain rate for the range from 0.001%/min to 0.1%/min. Direct comparison of the strain-rate effects between frozen and unfrozen specimens with identical strain paths and states in the soil skeleton clearly indicates that the viscoplasticity derives from that of pore ice. A conceptual interpretative framework invoking temperature- and strain rate-dependent state bounding surfaces and CSLs was proposed to describe the behavior of frozen soils under steady and non-steady temperature and strain rate. The above observations of the behavioral features of frozen and unfrozen soils, with further experimental work, are expected to lead to the construction of a unified framework for describing the behavior under both states and the transition between them. (C) 2017 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
  • A. Brosse, R. J. Jardine, S. Nishimura
    CANADIAN GEOTECHNICAL JOURNAL 54 3 313 - 332 2017年03月 [査読無し][通常論文]
     
    The paper describes the anisotropic undrained stiffness behaviour of four medium-plasticity heavily overconsolidated UK stiff marine clays as revealed through hollow cylinder testing. The experiments contributed to two broader studies on stiff-to-hard London, Gault, Kimmeridge, and Oxford clay strata. They involved static and dynamic testing of multiple highquality natural specimens sampled at similar depths from inland sites. This paper explores the directional dependency of the clays ' highly nonlinear undrained stiffness characteristics. New data-analysis approaches are outlined that allow the stiffnesses associated with one-dimensional vertical, horizontal, or pure horizontal shear modes to be isolated in complex undrained stress paths. In the presented experiments, loading progressed from in situ stresses to reach ultimate failure at a range of final major principal stress orientation angles alpha ( defined in the vertical plane) while keeping fixed values of the intermediate principal stress ratio, b. The tests reveal strong undrained stiffness anisotropy that can impact significantly on the prediction and understanding of ground deformation patterns in numerous geotechnical engineering applications.
  • Key Factors of Metastable Formation For Strength Development In Steel Slag-Dredged Soil Mixtures
    Toda, K, Otake, T, Sato, T, Weerakoon, N, Sato, H, Nishimura S
    International Symposium on Earth Resources Management & Environment, Colombo 2017年 [査読無し][通常論文]
  • Effect of silica-bearing phases in dredged soil on the strength development of steel slag-dredged soil mixtures
    Toda, K, Arai, Y, Otake, T, Sato, T, Weerakoon, N, Sato, H, Nishimura S
    16th International Clay Conference, Granada 2017年 [査読無し][通常論文]
  • Influence of natural structure on stiffness as multi-dimensional properties in K0-consolidated clays
    Nishimura, S
    Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 463 - 466 2017年 [査読無し][通常論文]
  • Laboratory estimation of stiffness and strength mobilization in steel slag-mixed dredged clays with curing time
    Weerakoon, N, Nishimura, S, Sato, H, Toda, K, Sato, T, Arai, Y
    Proceedings of the 3rd International Conference on Ground Improvement and Ground Control, Hangzhou 2017年 [査読無し][通常論文]
  • 山添 誠隆, 田中 洋行, 西村 聡, 林 宏親
    地盤工学ジャーナル 12 4 409 - 424 2017年 [査読無し][通常論文]
  • S. Nishimura, A. Iwaki, S. Takashino, H. Tanaka
    GEOTECHNIQUE 66 10 840 - 853 2016年10月 [査読無し][通常論文]
     
    This paper reports an attempt to accurately quantify one-dimensional compressibility of stiff, cement-treated high-water-content clays by using a constant-rate-of-strain (CRS) oedometer equipped with an image-based strain measurement system. The errors in stiffness measurements due to imperfect specimen-platen bedding and apparatus compliances, significant factors when stiff soils are tested, were avoided by directly observing movements of the specimen's lateral surface over a transparent confining ring. The proposed system is meant to be practical, requiring only minimum alterations to existing CRS oedometers and a generally available mid-market digital camera. The effectiveness of the method is demonstrated by testing six cement-treated clay specimens with or without air-foam inclusions in one-dimensional compression and by comparing the obtained compression curves with those obtained by more conventional measuring systems. The image analysis always revealed significantly stiffer responses than observed by the conventional methods. Validity of the image-based stiffness determination at small strains was confirmed by generally good agreements of its derived stiffness values with those obtained from highly precise triaxial probes, which provided a full set of cross-anisotropic elastic parameters. Implications for field problems are discussed in relation to an offshore reclamation project, in which similar cement-treated high-water-content clays were extensively used for upper layers.
  • Wang, J, Nishimura, S
    Proceedings of the International Mini-Symposium Chubu, Nagoya, Japanese Geotechnical Society Special Publication 5 2 155 - 160 2016年 [査読無し][通常論文]
  • Nishimura, S, Mart?nez, D. A
    Proceedings of the International Mini-Symposium Chubu, Nagoya, Japanese Geotechnical Society Special Publication 5 2 101 - 106 2016年 [査読無し][通常論文]
  • Factors affecting the strength development of steel slag-dredged soil mixtures
    Toda, K, Arai, Y, Otake, T, Sato, T, Sato, H, Nishimura, S
    3rd Asian Clay Conference, Guangzhou 2016年 [査読無し][通常論文]
  • Characterisation of state bounding surface at low effective stresses in clayey soils having different structures
    Panta, A, Nishimura, S
    Geotechnique 67 5 394 - 409 2016年 [査読無し][通常論文]
  • Wang, J, Nishimura, S
    Proceedings of the 6th Japan-China Geotechnical Symposium, Sapporo, Japanese Geotechnical Society Special Publication 1 1 6 - 11 2015年 [査読無し][通常論文]
  • Miki, T, Nishimura, S, Yamazoe, N
    Proceedings of the 6th Japan-China Geotechnical Symposium, Sapporo, Japanese Geotechnical Society Special Publication 1 6 29 - 34 2015年 [査読無し][通常論文]
  • Nishimura, S, Tokoro, T, Yamada, T, Izumi, N, Rivas, M. F
    Proceedings of the 6th Japan-China Geotechnical Symposium, Sapporo, Japanese Geotechnical Society Special Publication 1 7 34 - 39 2015年 [査読無し][通常論文]
  • Nishimura, S, Abe, K
    Proceedings of 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Fukuoka 2053 - 2058 2015年 [査読無し][通常論文]
  • Delvin Abdiel Martinez, Satoshi Nishimura
    DEFORMATION CHARACTERISTICS OF GEOMATERIALS 6 824 - 831 2015年 [査読無し][通常論文]
     
    The anisotropy characteristics of natural fined-grained soils' small-strain stiffness were experimentally studied and interpreted with an effective-stress cross-anisotropic elasticity model. Use of highly precise local instrumentation allowed determining all the five parameters necessary for describing the cross-anisotropic behavior of soil at small-strain levels. Similar techniques and interpretations have so far been applied to uniform sands and clays, but the investigated gradation ranges were fairly limited. In this research, natural samples of Holocene and Pleistocene seabed sediments with a wide range of fines content were tested to study their anisotropic stiffness parameters at small-strain levels. The inherent anisotropy characteristics were further discussed by looking at two more commonly quoted inter-modulus ratios, Ghh/Gvh and Eh'/Ev'. They were found to range 0.9-1.3 and 0.6-1.4, respectively. These ranges are closer to those reported for reconstituted sands than those for clays. There is a possibility that larger particles are more dominant in determining the stiffness anisotropy patterns in non-uniform intermediate soils.
  • Anand Panta, Satoshi Nishimura
    DEFORMATION CHARACTERISTICS OF GEOMATERIALS 6 1049 - 1056 2015年 [査読無し][通常論文]
     
    This paper discusses the undrained strength of heavily overconsolidated Izumi clay and a clay-sand mixed (C-S) soil at different states (i.e. intact, reconstituted, and compacted) in terms of the magnitude of strength and the degree of non-linearity of failure envelopes at low effective stress levels (5-20kPa), corresponding to the shallow slope failure expected at 1-2m of depth. A series of constant-volume direct shear (DS) tests supplemented by hollow cylinder (HC) simple shear tests was performed from low consolidation stresses. To express the non-linearity of failure envelopes at low stress ranges, a non-linear power law strength criterion was applied. The results suggest that the normalized strength and the degree of its non-linearity of Izumi clay at intact states were much higher than at equivalent reconstituted states, potentially due to true inter-particle cohesion. The compacted states led to slightly lower normalized strength than the reconstituted state in Izumi clay, while they did not result in significant difference in the C-S soil. Inclusion of coarser particle in a clayey soil seems to reduce the low stress level non-linearity of the strength envelopes at both states. All the above observations suggest that the low stress level strength characteristics and their dependence on states are significantly influenced by soil types; possibly by soil gradation.
  • Investigation of shrinkage and swelling behaviour of expansive/non-expansive clay mixtures
    Por, S, Likitlersuang, S, Nishimura, S
    Geotechnical Engineering Journal of the SEAGS & AGSSEA 46 1 117 - 127 2015年 [査読無し][通常論文]
  • Satoshi Nishimura
    SOILS AND FOUNDATIONS 54 3 364 - 376 2014年06月 [査読無し][通常論文]
     
    Recent developments in laboratory techniques adopting highly precise local instrumentation have made possible the determination of all five independent elastic parameters necessary for describing the small-strain stiffness in cross-anisotopic soils. However, the techniques and the derivation procedures are not necessarily straightforward, and different processes sometimes lead to apparently inconsistent sets of parameters, revealing their complex and sensitive nature. This paper firstly reports a new fully-instrumented triaxial system that was optimised to test Japanese standard-sized (070 75 mm) clay samples. The testing techniques and procedures to obtain the live cross-anisotropic elastic parameters, defined in this paper for recoverable strain smaller than 0.001%, are reviewed. Some updates, including notes on how to deal with creep in soft clays and the optimisation of drained probe rates, are described. A simplified procedure is proposed for completing the parameter determination, without actually measuring the radial displacement, by inverting the relationship between the undrained Young's modulus and the drained elastic parameters in saturated soils. The validity of this approach is demonstrated by comparing the parameters of sedimentary clays obtained with and without radial measurements. By eliminating the need for complex radial instrumentation, this approach will make the quantification of stiffness anisotropy more accessible in less-equipped laboratories. (C) 2014 The Japanese Geotechnical Society. Production and hosting by Elsevier Boy. All rights reserved.
  • Modelling of Improved Ground in Centrifuge
    Kitazume, M, Morikawa, Y, Nishimura, S
    Geotechnical Engineering Journal of the SEAGS & AGSSEA 45 3 1 - 11 2014年 [査読無し][通常論文]
  • 山添 誠隆, 田中 洋行, 西村 聡, 林 宏親
    地盤工学ジャーナル 9 3 427 - 442 2014年 [査読無し][通常論文]
  • S. Nishimura
    GEOTECHNIQUE 64 12 981 - 996 2014年 [査読無し][通常論文]
     
    The cross-anisotropic elasticity parameters were experimentally determined for six sedimentary clays of different ages and origins at both natural and reconstituted states by using high-precision triaxial apparatus. All the parameters and their dependency on the effective stress are satisfactorily described by a simple, conventional power-law model. The patterns of the inherent anisotropy exhibited close agreement between the natural and reconstituted states, suggesting that the development of natural microstructures due to ageing and diagenesis does not play a primary role in determining the anisotropy patterns in clays. Despite different degrees of stiffness anisotropy observed in the six clays, relatively well-defined correlations encompassing all the tested clays were found between certain stiffness parameters. While fully characterising the drained elasticity moduli is still a challenging laboratory task, these correlations will help estimate some of them based on more readily measurable undrained moduli. All the exponents in the stiffness model equations, representing the dependency of the moduli on effective stress states, were generally smaller for older natural clays, whereas they were broadly constant for reconstituted samples, indicating a cementation-like effect in older, aged clays. Poisson ratios, nu'(hh), nu'(hv) and nu'(vh), were generally very small, with secant nu'(vh) values becoming gradually larger at larger strains.
  • Development of predictive framework for geothermal and geotechnical responses in cold regions under climate changes
    Nishimura, S, Martin, C. J, Olivella, S, Gens, A, Fenton, C. H, Jardine, R. J
    Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris 3391 - 3394 2013年 [査読無し][通常論文]
  • Experimental study on compaction grouting method for liquefiable soil using centrifuge test and X-ray tomography
    Takano, D, Morikawa, Y, Takehana, K, Nishimura, S
    Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris 965 - 968 2013年 [査読無し][通常論文]
  • 高野 大樹, 西村 聡, 竹花 和浩, 森川 嘉之, 高橋 英紀
    地盤工学ジャーナル 8 1 81 - 95 2013年 [査読無し][通常論文]
  • Satoshi Nishimura, Hidenori Takahashi, Yoshiyuki Morikawa
    SOILS AND FOUNDATIONS 52 1 81 - 98 2012年02月 [査読無し][通常論文]
     
    The dynamic and non-dynamic interactions between a gravity-type quay wall and a backfill around were investigated by centrifuge model testing, considering cases in which a rigidly cement-stabilised ground existed at varying distances from the quay wall. In conducting the centrifuge tests, the performance of the instrumentation applied to measure the pressure from granular soils was critically assessed. At non-dynamic states, the backfill confined between the quay wall and the rigidly stabilised soil block exerted smaller earth pressure at deeper locations, at both apparently active and transient states. The calculation, based on perfect plasticity and considering friction arching, was useful in explaining these results. A similar feature was also observed during the steady-state oscillations, in the case of dry sand backfill, and was associated with the system's increased seismic stability. In underwater cases, the pore water fluctuations in the backfill dominated the total earth pressure behaviour, with the active pressure being smaller again from a confined fill than from a fully extending one. Despite the reduced active pressure, placing the stabilised soil in the proximity of the quay wall increased the wall's permanent seaward movement, unless the two bodies were in direct contact. This ostensible association of smaller active pressure with greater instability in the underwater cases cannot be explained by the conventional, simplified conception of the active earth pressure as a unilateral cause of instability. The evaluation of such unconventional backfill conditions seems to require rigorous consideration of the simultaneous soil-water-structure interactions. (C) 2012. The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.
  • Kitazume, M, Nishimura, S
    Proceedings of the 4th International Conference on Grouting and Deep Mixing, New Orleans 2012年 [査読無し][通常論文]
  • Modelling of Improved Ground in Centrifuge
    Kitazume, M, Morikawa, Y, Nishimura, S
    Asiafuge-2012, Mumbai 2012年 [査読無し][通常論文]
  • Satoshi Nishimura, Kazuhiro Takehana, Yoshiyuki Morikawa, Hidenori Takahashi
    SOILS AND FOUNDATIONS 51 6 1037 - 1049 2011年12月 [査読無し][通常論文]
     
    In-situ static compaction by grouting is routinely used as a countermeasure against liquefaction in loose sandy ground. The surrounding ground's stress changes induced by grout injection are considered to be an important cause for the stabilisation effects, along with some densification of the ground in the bulb's vicinity. The present study investigates characteristics of the stress changes by simulating compaction grouting processes in a geotechnical centrifuge. Detailed descriptions are given of apparatus and experimental techniques specifically developed for conducting miniature injection tests. The observed increases in the horizontal stresses, evaluated in terms of the earth pressure coefficient, K, reflected the influence of grout pile spacing, and were found to be consistent with field measurements except near the surface. The centrifuge tests also allowed the changes in the dominant stress direction within the horizontal planes at the stabilised domain's centre to be evaluated, with the results indicating the dependency of the stress changes upon depth and interactions between neighboring grout piles. The significance of the stress changes in increasing the liquefaction resistance is demonstrated by mapping liquefaction curves against initial stress states through a series of cyclic hollow cylinder simple shear tests.
  • N. A. Minh, S. Nishimura, A. Takahashi, R. J. Jardine
    DEFORMATION CHARACTERISTICS OF GEOMATERIALS, PTS 1 AND 2 287 - 294 2011年 [査読無し][通常論文]
     
    This paper outlines the loading, control and instrumentation systems of two Hollow Cylinder Apparatus' used at Imperial College in recent research into the potentially strong anisotropy of brittle stiff clays and mudrocks. The HCAs can apply a wide range of stress paths and modes of shearing allowing the direction of the major principal stress axis, alpha (or that of the principal stress increment, alpha(d sigma)) and the sigma(2) parameter, b = (sigma(2)-sigma(3))/(sigma(1)-sigma(3)) to be controlled independently. The paper describes how representative intact HCA specimens were formed from rotary cores and block samples and reports on the steps taken to minimize stress-strain non-uniformity and specimen set-up disturbance set up. While the characterization of anisotropic shear strength is reported elsewhere, it is shown how non-linear and anisotropic mudrock stiffness was characterized and improved simple shear tests conducted.
  • Masaki Kitazume, Satoshi Nishimura
    GROUND IMPROVEMENT TECHNOLOGIES AND CASE HISTORIES 431 - 436 2010年 [査読無し][通常論文]
     
    The quality assurance (QA) of cement treated soil in Japan normally involves unconfined compression tests on in-situ treated soil sampled by core boring. In some other countries, treated soil excavated by wet grab sampling instead of core sampling is often used for QA. Lack of systematic research comparing the treated soil's strength obtained in these two different methods has restricted evaluation of their merits. The authors started a research project in which a series of field and laboratory tests was carried out to compare the treated soil strength and discuss the applicability of wet grab sampling to QA in wet- and dry-type deep mixing techniques. Deep-mixed soil was sampled with two types of wet grab sampler to prepare specimens soon after the field DM execution, and was subjected to unconfined compression tests after four weeks' curing in laboratory to compare the strength with that of laboratory-mixed and core sampled specimens. The wet grab specimens exhibited less variability in strength than the core specimens, but the strength itself was significantly lower than that of the core and laboratory-mixed specimens. The difference observed in the strength was particularly stark for the dry deep mixing method, necessitating further research into the causes of the difference.
  • International Collaborative Study Task 2 Report: Interpretation of comparative test program
    Kitazume, M, Ohishi, K, Nishimura, S, Terashi, M
    Proceedings of the International Symposium on Deep Mixing & Admixture Stabilization, Okinawa 127 - 140 2009年 [査読無し][通常論文]
  • International Collaborative Study Task 1: Investigation into Practice of Laboratory Mix Tests as Means of QC/QA for Deep Mixing Method
    Kitazume, M, Nishimura, S, Terashi, M, Ohishi, K
    Proceedings of the International Symposium on Deep Mixing & Admixture Stabilization, Okinawa 107 - 126 2009年 [査読無し][通常論文]
  • Influence of specimen preparation and curing conditions on unconfined compression behaviour of cement-treated clay
    Kitazume, M, Nishimura, S
    Proceedings of the International Symposium on Deep Mixing & Admixture Stabilization, Okinawa 155 - 160 2009年 [査読無し][通常論文]
  • S. Nishimura, C. J. Martin, R. J. Jardine, C. H. Fenton
    GEOTECHNIQUE 59 3 213 - 227 2009年 [査読無し][通常論文]
     
    Infrastructure in cold regions is vulnerable to the potential degradation of permafrost under a warming climate. Meanwhile, the accumulation of meteorological data and the refinement of AOGCMs in recent years have improved the confidence in future global air temperature predictions. A reliable scheme is now desired that converts these climate predictions into future geocryological predictions relevant to geotechnical engineering and risk assessment. This paper describes a multidisciplinary approach that provides a first estimate of transient ground responses to climate change on a regional basis. The scheme integrates locally adjusted AOGCM climate predictions, regional geological assessments, non-linear thermal finite element analysis and digital elevation models derived from remote sensing data. The practical application of the approach is demonstrated through predictions made of the geocryological changes expected between 1940 and 2059 in a Siberian region. The paper presents results from one sampled area where discontinuous permafrost is present beneath rolling hills terrain. It is shown that elevation, vegetation and local geological variations all affect the development of permafrost, with important implications for infrastructure design and operation. A range of useful geocryological maps can be output from the procedure, including temperature at the active layer base, permafrost table depth, and ground temperature at any desired depth. It is shown that the permafrost model's predictions for present-day conditions agree well with existing geocryological maps. An illustrative example of how simple geohazard maps may be prepared from the output is also provided.
  • S. Nishimura, A. Gens, S. Olivella, R. J. Jardine
    GEOTECHNIQUE 59 3 159 - 171 2009年 [査読無し][通常論文]
     
    A fully coupled thermo-hydro-mechanical (THM) finite element (FE) formulation is presented that considers freezing and thawing in water-saturated soils. The formulation considers each thermal, hydraulic and mechanical process, and their various interactions, through fundamental physical laws and models. By employing a combination of ice pressure, liquid pressure and total stress as state variables, a new mechanical model has been developed that encompasses frozen and unfrozen behaviour within a unified effective-stress-based framework. Important frozen soil features such as temperature and porosity dependence of shear strength are captured inherently by the model. Potential applications to geotechnics include analysis of frost heave, foundation stability or mass movements in cold regions. The model's performance is demonstrated with reference to the in situ pipeline frost heave tests conducted by Slusarchuk et al. Detailed consideration is given to FE mesh design, the influence of hydraulic parameters, and the treatment of air/ground interface boundary conditions. The THM simulation is shown to reproduce, with fair accuracy, the observed pipeline heave and the porosity growth driven by water migration.
  • A Multi-disciplinary Approach to Assess the Impact of Global Climate Change on Infrastructure in Cold Regions
    Clarke, J, Fenton, J, Gens, A, Jardine, R, Martin, C, Nethercot, D, Nishimura, S, Olivella, S, Reifen, C, Rutter, P, Strasser, F, Toumi, R
    Proceedings of the 9th International Conference on Permafrost, Fairbanks 279 - 284 2008年 [査読無し][通常論文]
  • Characteristics of London Clay: stiffness and influence of structure, a summary
    A. Gasparre, S. Nishimura, N. Anh-Minh, M. R. Coop, R. J. Jardine
    DEFORMATION CHARACTERISTICS OF GEOMATERIALS, VOLS 1 AND 2 191 - 197 2008年 [査読無し][通常論文]
     
    This paper summarises the findings of recent research into the behaviour or London Clay from Heathrow Terminal 5, West London. The study focused on the structure, stiffness and strength anisotropy of the clay, and how these related to its geological origins and history, as expressed by its lithological units. Advanced triaxial, hollow cylinder apparatus (HCA) dynamic testing techniques were employed. Stiffness parameters were established at all levels of deformation. The effects oldie clay's natural structure were studied through comparisons with the intrinsic behaviour of reconstituted samples. The structure varied between units and contributed to the enhanced shear strength of intact unfissured clay. The mass shear strength was strongly affected by natural fissuring, the most clay's important mesofabric feature. Marked anisotropy was revealed at all scales of deformation and the framework of cross-anisotropic elasticity was found to apply broadly to the behaviour observed within the first of the clay's kinematic yield surfaces. The limits to the latter were established and a second kinematic surface was identified that once engaged signified a new pattern of strain increment direction and stiffness degradation.
  • Simple shear testing of London Clay in hollow cylinder apparatus
    S. Nishimura, R. J. Jardine, A. Brosse
    DEFORMATION CHARACTERISTICS OF GEOMATERIALS, VOLS 1 AND 2 199 - 206 2008年 [査読無し][通常論文]
     
    A series of undrained simple shear tests on high OCR London Clay was performed using Hollow Cylinder Apparatus (HCA) as part of an extensive investigation into the London Clay at Heathrow Airport Terminal 5. The HCA has several important advantages over conventional simple shear apparatus, including the capability of measuring lateral effective stresses. The HCA was equipped with a resonant column device and deformation characteristics were studied over a wide strain range, with particular interest in yield behaviour at small strains (gamma < 10(-4)). At failure, the angle alpha between the major principal stress direction and the vertical was 50-65 degrees and the intermediate principal stress ratio b was typically 0.5-0.8. These values fall midway between those applying to triaxial compression and extension. In simple shear, the strength was substantially lower than in triaxial compression, indicating significant shear strength anisotropy. Limited testing suggests that the simple shear effective stress failure envelope expanded with depth, as has been seen in triaxial compression. However, this feature is less pronounced in simple shear, possibly due to the clay's natural discontinuities. The discontinuities also contribute to the clay's marked shear strength anisotropy.
  • D. W. Hight, A. Gasparre, S. Nishimura, N. A. Minh, R. J. Jardine, M. R. Coop
    GEOTECHNIQUE 57 1 3 - 18 2007年01月 [査読無し][通常論文]
     
    The innovative engineering approach adopted for the new Terminal 5 at Heathrow Airport called for an advanced investigation of the London Clay strata, including detailed in situ profiling and stress path laboratory testing on high-quality rotary-cored samples. Although the scope of the investigations exceeded that normally specified for conventional design, questions relating to the structure and anisotropy of stiffness and strength of the clay remained that could not be answered. Further research was required, and the deep excavations at the site provided the opportunity for a team from Imperial College to take multiple block samples from three depths, supplemented by two additional dedicated rotary-cored boreholes. Intensive research was performed at Imperial College on these samples, as described in three companion papers by Gasparre et al. and Nishimura et al. This overview paper integrates the findings from the recent research with those from the commercial investigation and with earlier studies to extend our understanding of the geology and key characteristics of this stiff clay, and their variation with depth. The influence of lithology, structure and destructuring is examined, and the practical implications of the work are discussed.
  • A. Gasparre, S. Nishimura, N. A. Minh, M. R. Coop, R. J. Jardine
    GEOTECHNIQUE 57 1 33 - 47 2007年01月 [査読無し][通常論文]
     
    An investigation of natural London Clay is reported involving advanced triaxial, hollow cylinder apparatus (HCA) and dynamic testing techniques. Significant anisotropy was revealed at all scales of deformation, and the framework of cross-anisotropic elasticity was found to apply broadly to the initial elastic behaviour. The stiffness parameters obtained by independent techniques generally exhibited good agreement, with the greatest deviation being seen in the Poisson's ratios, which fell far from the values usually assumed in conventional foundation analysis. Probing tests established the limits to the elastic domain over a range of depths, showing that these scaled in proportion to the mean effective stress level, as did those of a second kinematic surface that surrounded the elastic domain. Once engaged, this second surface signified a new pattern of strain increment directions, faster elastic-plastic stiffness decay with strain, and also a greater dependence of behaviour on recent stress history. However, the two kinematic surfaces cover a relatively small proportion of the admissible stress space, and behaviour at larger strains is both anisotropic and strongly non-linear, features that affect profoundly the soil displacements induced by geotechnical construction in this deposit.
  • A. Gasparre, S. Nishimura, M. R. Coop, R. J. Jardine
    GEOTECHNIQUE 57 1 19 - 31 2007年01月 [査読無し][通常論文]
     
    An intensive investigation is described into the London Clay units from Heathrow Terminal 5. Intrinsic properties and composition were established, and relating the behaviour of intact and reconstituted samples allowed the effects of the clay's natural structure to be identified at all depths. Structure varied between units, but some general features emerged that have not been seen in other stiff clays. In particular, intact samples follow paths under isotropic or K-0 compression that fail to provide well-defined gross yield points, or converge with the unit's intrinsic compression lines. Structure contributes to the enhanced shear strength of intact unfissured clay and affects the initial stiffness relationships. Some identifiable features of the intact units' fabric correlated directly with their behaviour. Natural fissures within the clay, the most important mesofabric feature, had an important impact on shear strength and led to an unusual pattern of directional dependence, and particle orientation trends identified by scanning electron microscopy governed the strong elastic stiffness anisotropy. The potential for destructuration through swelling to low effective stresses was also studied and found significant for subsequent volumetric compression behaviour, but not for shearing. Hight et al. synthesise the data from this and companion papers presented by the authors, and discuss the practical consequences of the results obtained.
  • S. Nishimura, N. A. Minh, R. J. Jardine
    GEOTECHNIQUE 57 1 49 - 62 2007年01月 [査読無し][通常論文]
     
    The paper reports the shear strength anisotropy of the natural, highly overconsolidated, London Clay from Heathrow Terminal 5 as established by comprehensive hollow cylinder apparatus (HCA) testing. Multiple high-quality block samples from 5.2 m and 10.5 m below ground level provided samples for suites of undrained stress-path shear tests performed after consolidation to effective stress states similar to those estimated in situ. The direction of the major principal stress axis, alpha (or of the principal stress increment, alpha(d sigma)), and relative magnitude of the intermediate principal stress, b = (sigma(2) - sigma(3))/(sigma(1) - sigma(3)), were chosen as the controlled stress-related variables and their influence on the peak shear strength was investigated. Strong shear strength anisotropy was proven, and a potential effect of the parameter b was also detected. With b 0.5, for example, a minimum was noted in peak q/p' at around 45 - 678, and the maximum value, which was larger by some 40%, developed at alpha = 0 degrees. A limited set of data obtained with larger test specimens suggested a possibility that loading with 90 degrees could also lead to relatively low shear strength. The pre-failure pore water pressure development reflected anisotropy of the deformation characteristics at smaller strains and contributed to the total-stress undrained shear strength anisotropy. Regarding the influence of b, the Mohr-Coulomb failure line passing through the data for b = 0 or 1 provided a lower bound of all the data for a given value of alpha. The investigation of anisotropy was extended to deeper horizons of the stratum through profiling tests involving triaxial extension and simple shear conditions. Although the results confirmed the general patterns of anisotropy observed at 5.2 and 10.5 m below ground level, the degree of anisotropy appeared to become stronger with depth.
  • C Pathma, K Gallage, Towhata, I, S Nishimura
    SOILS AND FOUNDATIONS 45 4 43 - 60 2005年08月 [査読無し][通常論文]
     
    Experiences of past earthquakes show that many structural damages occur due to liquefaction-induced ground deformation. Accordingly, the prediction of liquefaction-induced ground deformation plays a major role in mitigation of damages. Even though numerical methods are developed in three-dimensional way to predict liquefaction-induced deformation, lack of understanding of mechanical properties of liquefied sand makes the prediction unrealistic. Therefore, employing a hollow cylinder torsion shear apparatus, the present study aims to investigate the large deformation of liquefied sand which is tentatively considered to be rate-dependent. Since it is impossible to run experiments on specimens with null effective stress, tests were conducted at very low effective stresses such as 5, 10, and 15 kPa and possibility for extrapolation of data to zero effective stress was attempted in order to study mechanical properties of liquefied sand. In this study, specimens with low effective stress were further sheared by stepwise monotonic axial compression in drained manner and the shear stress was found to be composed of frictional as well as rate-dependent viscous components. The results suggested that viscosity of sand increases with the increase of the mean effective stress. Note that a triaxial extension test and two tests on a special light grain material (Styrofoam) were conducted to investigate viscosity at low effective stress such as 3 to 4 kPa. Noteworthy was that effects of relative density on viscosity were not significant. The test conducted with pore water, pore air, and vacuum revealed that viscosity of liquefied sand was contributed by pore fluid and particle collision during flow. Furthermore, it was suggested that increase in the fines content leads to lower viscosity.
  • S Nishimura, Towhata, I
    SOILS AND FOUNDATIONS 44 2 103 - 116 2004年04月 [査読無し][通常論文]
     
    A new three-dimensional stress-strain model of sand is proposed by using the concept of multiple shear mechanisms which previously has been developed in a two-dimensional manner. The original model exhibited excellent capability for simulating the principal stress axis rotation. By extending this approach with a new dilatancy model, the present model makes it possible to describe a general stress state in three-dimensional space with the whole six degrees-of-freedom of stress taken into account. Modelling of sand behaviours under general drained and undrained conditions was achieved by applying a stress-dilatancy relation to all individual shear mechanisms. It was demonstrated that the model predicts well soil behaviour in rather complex three-dimensional shear loadings as well as in more fundamental two-dimensional ones.
  • 2 and 3-Dimensional Dynamic Analysis of Large Deformation of Liquefied Ground
    Kobayashi, Y, Nishimura, S
    Proceedings of the 10th Asian Regional Conference, Soil Mechanics and Geotechnical Engineering, Singapore 303 - 306 2003年 [査読無し][通常論文]
  • Nishimura, S, Towhata, I, Honda, T
    Soils and Foundations 42 4 85 - 94 2002年 [査読無し][通常論文]
  • Torsion shear tests on rate-dependent behavior of liquefied sand
    Nishimura, S, Honda, T, Towhata, I
    10th International Conference on Soil Dynamics and Earthquake Engineering, Philadelphia 2001年 [査読無し][通常論文]

書籍

  • 図説 わかる土質力学
    菊本 統, 西村 聡, 早野 公敏 (担当:共著)
    学芸出版社 2015年

講演・口頭発表等

  • 凍結工法の設計に用いる凍土強度の実用的な試験方法  [通常講演]
    吉田 輝, 永谷英基, 辻 良祐, 田口翔大, 相馬 啓, 長田友里恵, 西村 聡
    雪氷研究大会 2018年 札幌
  • 各種改良土の凍上・解凍沈下特性 −凍土データベースの整備(その3)−  [通常講演]
    吉田 輝, 辻 良祐, 永谷英基, 田口翔大, 相馬 啓, 長田友里恵, 西村 聡
    土木学会第73回年次学術講演会 2018年 札幌
  • 各種改良土の凍結強度特性 −凍土設計データベースの整備(その2)−  [通常講演]
    田口翔大, 辻 良祐, 永谷英基, 吉田 輝, 西村 聡, 長田友里恵, 相馬 啓
    土木学会第73回年次学術講演会 2018年 札幌
  • Investigation of the strain rate-dependent consolidation behavior of four peats  [通常講演]
    Thenuwara, T. A. U, 西村 聡, 市川 瑠
    第58回地盤工学会北海道支部技術報告会 2018年 札幌
  • カルシア改質土の力学特性に対するスラグ粒度・間隙水化学の影響  [通常講演]
    佐藤令菜, 西村 聡, 戸田賀奈子, Weerakoon, N, 佐藤 努
    第58回地盤工学会北海道支部技術報告会 2018年 札幌
  • 盛土中の浸潤面挙動に関するパラメトリックスタディからの知見  [通常講演]
    西村 聡・Rivas, M. F
    第58回地盤工学会北海道支部技術報告会 2018年 札幌
  • 掘削発生土を用いた河川堤防築堤時に発生した堤体内間隙水圧挙動  [通常講演]
    林 宏親, 山梨高裕, 西村 聡, 三浦勝義
    第58回地盤工学会北海道支部技術報告会 2018年 札幌
  • Behaviour of a plastic clay during repeated freeze-thaw cycles  [通常講演]
    Bhakta, J. R, Nishimura, S, Wang, J
    第58回地盤工学会北海道支部技術報告会 2018年 札幌
  • 凍土の一軸圧縮・曲げ引張・せん断強度の一括評価 ―凍土設計データベースの整備―  [通常講演]
    吉田 輝, 辻 良祐, 田口翔大, 永谷英基, 長田友里恵, 相馬 啓, 西村 聡
    第53回地盤工学研究発表会 2018年 高松
  • Particle Image Velocimetry Analysis for the Investigation of the Strain Rate-Dependent Consolidation Behavior of Peats  [通常講演]
    Thenuwara, T. A, Udeshika D, 西村 聡, 市川 瑠
    第53回地盤工学研究発表会 2018年 高松
  • 泥炭の異方透水性計測のための試験法高度化に関する研究  [通常講演]
    多田駿太郎, 西村 聡, 山添誠隆
    第53回地盤工学研究発表会 2018年 高松
  • 凍結粘性土の剛性特性(その2):状態依存性  [通常講演]
    岡島将太, 西村 聡・Joshi, Bhakta R, 王 金元
    第53回地盤工学研究発表会 2018年 高松
  • 結粘性土の剛性特性(その1):静的計測法と応力−ひずみ非線形性  [通常講演]
    西村 聡, 岡島将太, Joshi, Bhakta R, 王 金元
    第53回地盤工学研究発表会 2018年 高松
  • 砂質土堤防の常時間隙水圧状態の調査・観測と浸透流解析による再現  [通常講演]
    西家 翔, 西村 聡, 山添誠隆, 花田智秋
    第53回地盤工学研究発表会 2018年 高松
  • 異なる 泥炭のせん断挙動の時間依存性に関する室内実験と解釈  [通常講演]
    市川 瑠, 西村 聡, 山添誠隆
    第53回地盤工学研究発表会 2018年 高松
  • Experimental study of clay subjected to undrained freeze-thaw cycles under isotropic confining stress  [通常講演]
    Joshi, Bhakta R, 西村 聡, 王 金元
    第53回地盤工学研究発表会 2018年 高松
  • 砂質土堤防の降雨に対する水理応答:計測事例と解析  [通常講演]
    西村 聡, 山添誠隆, 西家 翔, 花田智秋
    第5回河川堤防技術シンポジウム 2017年 東京
  • THM連成解析における凍結土力学モデルのフレームワーク:温度・拘束圧効果について  [通常講演]
    西村 聡, 王 金元, 佐々木飛翔
    第57回地盤工学会北海道支部技術報告会 2017年 北見
  • Stiffness and strength mobilization in steel slag?mixed dredged clays with various curing time  [通常講演]
    Weerakoon, N. M. N, 佐藤令菜, 西村 聡
    第57回地盤工学会北海道支部技術報告会 2017年 北見
  • 地表面の水収支を考慮した築堤時間隙水圧挙動の解析  [通常講演]
    中野渡博道, 西村 聡, 林 宏親, 田村真次
    第57回地盤工学会北海道支部技術報告会 2017年 北見
  • 掘削発生土を盛土材料に用いた河川堤防の安定性改善に向けた試験施工  [通常講演]
    林 宏親, 山木正彦, 西村 聡, 田村真次
    第57回地盤工学会北海道支部技術報告会 2017年 北見
  • 裏法尻にドレーン材を用いた盛土での地表面の水収支を考慮した築堤時間隙水圧挙動の解析  [通常講演]
    中野渡博道, 西村 聡, 林 宏親, 山木正彦, 田村真次
    第52回地盤工学研究発表会 2017年 名古屋
  • A long term field monitoring and investigation of river dyke slopes’ near-surface strength  [通常講演]
    Panta, Ana, 西村 聡
    第52回地盤工学研究発表会 2017年 名古屋
  • 泥炭地盤表層におけるアイソタック則を考慮した弾粘塑性モデルの適用検討事例  [通常講演]
    三木拓也, 西村 聡, 山添誠隆
    第52回地盤工学研究発表会 2017年 名古屋
  • 泥炭の圧密・せん断挙動の時間依存性とアイソタック則の適用性  [通常講演]
    市川 瑠, 山添誠隆, 西村 聡
    第52回地盤工学研究発表会 2017年 名古屋
  • Characteristics of stiffness and strength mobilization in steel slag-mixed dredged clays  [通常講演]
    Weerakoon, Nilan, 西村 聡, 佐藤令菜, 戸田賀奈子, 佐藤 努, 新井 悠
    第52回地盤工学研究発表会 2017年 名古屋
  • 一般的な応力・ひずみ履歴をもつ飽和凍結土のせん断強度とその記述  [通常講演]
    西村 聡, 王 金元, 佐々木飛翔
    第52回地盤工学研究発表会 2017年 名古屋
  • シリンダーフロー試験による粘土スラリーのレオロジー特性に関する再評価  [通常講演]
    矢野稔弥, 渡部要一, 田中洋行, 西村 聡
    第52回地盤工学研究発表会 2017年 名古屋
  • Isotache則を用いた泥炭地盤表層における長期沈下解析  [通常講演]
    三木拓也, 山添誠隆, 西村 聡
    第56回地盤工学会北海道支部技術報告会 2016年 札幌
  • カルシア改質浚渫土の早期強度・剛性発現特性とその解釈  [通常講演]
    佐藤令菜, 西村 聡, 佐藤 努, 戸田賀奈子, 新井 悠
    第56回地盤工学会北海道支部技術報告会 2016年 札幌
  • Predicting pore water pressure variations in embankments due to evapotranspiration and precipitation  [通常講演]
    西村 聡, 所 哲也, Rivas, M. F
    第56回地盤工学会北海道支部技術報告会 2016年 札幌
  • カルシア改質土の強度発現特性とせん断剛性による初期硬化挙動の評価  [通常講演]
    佐藤令菜, 西村 聡, 佐藤 努, 戸田賀奈子, 新井 悠
    第51回地盤工学研究発表会 2016年 岡山
  • アイソタック則に基づく泥炭の二次圧密挙動の評価  [通常講演]
    前川侑太, 三木拓也, 西村 聡
    第51回地盤工学研究発表会 2016年 岡山
  • 混合土盛土材の非排水圧縮特性と築堤時水圧挙動への影響の検討  [通常講演]
    中野渡博道, 西村 聡
    第51回地盤工学研究発表会 2016年 岡山
  • A new approach to interpret strength characteristics of frozen clay under effects of temperature, strain rate and confining pressure  [通常講演]
    王 金元, 西村 聡
    第51回地盤工学研究発表会 2016年 岡山
  • Analysis of the hydraulic behavior of the Abukuma river dyke considering infiltration and evapotranspiration  [通常講演]
    Rivas, Maria Fernanda, 西村 聡
    第51回地盤工学研究発表会 2016年 岡山
  • 降雨浸透・蒸発散を考慮した細粒土盛土の水理状態の解釈  [通常講演]
    西村 聡, 所 哲也・Rivas, Maria Fernanda
    第51回地盤工学研究発表会 2016年 岡山
  • 周辺地盤に生じる変形の予測精度向上を目指した泥炭性軟弱地盤に対する剛性特性の定式化と実地盤への適用  [通常講演]
    山添誠隆, 田中洋行, 西村 聡, 林 宏親
    第55回地盤工学会北海道支部技術報告会 2015年 室蘭
  • 降雨浸透と盛土・基礎地盤圧縮に起因する堤体内水位変動の予測  [通常講演]
    西村 聡
    第55回地盤工学会北海道支部技術報告会 2015年 室蘭
  • 軟弱自然粘土の非排水強度異方性測定とその影響因子  [通常講演]
    福富悠太, 西村 聡
    第55回地盤工学会北海道支部技術報告会 2015年 室蘭
  • Investigation of anisotropic elastic moduli of Ishikari Bay sediments in triaxial apparatus  [通常講演]
    Mart?nez , D. A, Nishimura, S
    第55回地盤工学会北海道支部技術報告会 2015年 室蘭
  • Undrained strength of fine-grained soils involved in shallow slope failure  [通常講演]
    Panta, A, Nishimura, S
    第55回地盤工学会北海道支部技術報告会 2015年 室蘭
  • 粘性土のセメンテーションの発達に対する養生中状態変化の影響  [通常講演]
    阿部昂祐, 西村 聡, 杉淵 玄
    第55回地盤工学会北海道支部技術報告会 2015年 室蘭
  • Mechanical behavior of frozen clay under effects of temperature and strain rate  [通常講演]
    王 金元, 西村 聡
    第50回地盤工学研究発表会 2015年 札幌
  • 泥炭地盤表層における二次元長期沈下挙動に関する模型実験と有限要素数値解析  [通常講演]
    三木拓也, 西村 聡, 山添誠隆
    第50回地盤工学研究発表会 2015年 札幌
  • 非連成浸透流解析による盛土築造時の間隙水圧増加メカニズムの検討  [通常講演]
    西村 聡
    第50回地盤工学研究発表会 2015年 札幌
  • 高有機質固化処理土の剛性とその非線形性および応力依存性  [通常講演]
    杉山洋平, 西村 聡
    第54回地盤工学会北海道支部技術報告会 2014年 札幌
  • 泥炭地盤中の管状構造物の長期沈下に関する模型実験  [通常講演]
    西村 聡, 三木拓也
    第54回地盤工学会北海道支部技術報告会 2014年 札幌
  • 泥炭地盤における管状構造物の長期沈下挙動解明に向けた二次元模型実験  [通常講演]
    三木拓也, 西村 聡
    第49回地盤工学研究発表会 2014年 北九州
  • 中空試験機による正規圧密自然粘土の非排水強度異方性測定事例  [通常講演]
    福富悠太, 西村 聡, 田中洋行
    第49回地盤工学研究発表会 2014年 北九州
  • セメント固化処理粘性土の強度に対する養生中有効応力の影響  [通常講演]
    阿部昂祐, 西村 聡
    第49回地盤工学研究発表会 2014年 北九州
  • 粘土の異方剛性:新しい測定方法と大阪湾粘土への適用  [通常講演]
    西村 聡
    第53回地盤工学会北海道支部技術報告会 2013年 函館
  • 大阪湾粘土群の異方弾性係数の特性  [通常講演]
    西村 聡
    第48回地盤工学研究発表会 2013年 富山
  • セメント改良高有機質土の動的変形特性  [通常講演]
    杉山洋平, 西村 聡
    第48回地盤工学研究発表会 2013年 富山
  • 軽量混合固化処理土・管中混合固化処理土の低拘束圧下での圧縮性評価  [通常講演]
    高篠周平, 四戸彩香, 西村 聡
    第48回地盤工学研究発表会 2013年 富山
  • 泥炭地盤におけるCPT結果の解釈  [通常講演]
    田中洋行, 西村 聡, 金子広明, 稗田教雄, 服部 直, 安田直樹
    第52回地盤工学会北海道支部技術報告会 2012年 札幌
  • 液状化対策としての静的圧入締固め工法に関する模型実験(その2加振実験)  [通常講演]
    竹花和浩, 高野大樹, 森川嘉之, 西村 聡, 高橋英紀
    第47回地盤工学研究発表会 2012年 八戸
  • 液状化対策としての静的圧入締固め工法に関する模型実験(その1 注入実験)  [通常講演]
    高野大樹, 竹花和浩, 森川嘉之, 西村 聡, 高橋英紀
    第47回地盤工学研究発表会 2012年 八戸
  • 静的・動的ハイブリッド三軸試験装置によるセメント改良粘土の異方弾性係数の測定  [通常講演]
    西村 聡
    第47回地盤工学研究発表会 2012年 八戸
  • 砂質土への粘土スラリーの浸入特性に関する基礎的研究  [通常講演]
    杉山洋平, 西村 聡
    第47回地盤工学研究発表会 2012年 八戸
  • 画像解析を用いた土の一次元圧縮性の高精度評価  [通常講演]
    四戸彩香, 西村 聡
    第47回地盤工学研究発表会 2012年 八戸
  • 静的締固め杭の水平間距離と応力変化・地盤変形の関係  [通常講演]
    西村 聡, 竹花和浩, 森川嘉之, 高橋英紀
    第51回地盤工学会北海道支部技術報告会 2011年 苫小牧
  • 東南海・南海地震対策を想定した護岸の遠心模型実験  [通常講演]
    二宮裕介, 小泉勝彦, 岡田克寛, 森川嘉之, 西村 聡
    第46回地盤工学研究発表会 2011年 神戸
  • 複数グラウト杭注入作製に伴う地盤内応力変化特性  [通常講演]
    西村 聡, 竹花和浩, 森川嘉之, 高橋英紀
    第46回地盤工学研究発表会 2011年 神戸
  • 液状化対策としての静的圧入締固め工法の遠心場における再現  [通常講演]
    西村 聡, 高橋英紀, 森川嘉之
    第45回地盤工学研究発表会 2010年 松山
  • ウェットグラブサンプリングによる現場深層混合処理土の強度について  [通常講演]
    北詰昌樹, 西村 聡
    第45回地盤工学研究発表会 2010年 松山
  • 粒子画像流速測定法(PIV)を利用した変位計測の遠心力場への適用性の検討  [通常講演]
    二宮裕介, 高橋英紀, 西村 聡, 森川嘉之
    第45回地盤工学研究発表会 2010年 松山
  • 遠心力場における粒子画像流速測定法(PIV)を利用した変位計測方法の検討  [通常講演]
    二宮裕介, 高橋英紀, 西村 聡, 森川嘉之
    第6回地盤工学会関東支部発表会 2009年 宇都宮
  • 背後地盤固化改良による重力式岸壁の耐震補強効果の実験的検証(第二報)  [通常講演]
    西村 聡, 高橋英紀, 森川嘉之
    第44回地盤工学研究発表会 2009年 横浜
  • 背後地盤固化改良による重力式岸壁の耐震補強効果の実験的検証  [通常講演]
    西村 聡, 高橋英紀, 森川嘉之
    第43回地盤工学研究発表会 2008年 広島
  • Laboratory shear tests on rate dependent nature of liquefied sand with fines  [通常講演]
    Gallage, C.P.K, Towhata, I, Nishimura, S
    4th International Summer Symposium, JSCE 2002年 京都
  • マルチスプリングモデルによる砂の三次元構成則  [通常講演]
    西村 聡, 東畑郁生
    第37回地盤工学研究発表会 2002年 大阪
  • 液状化した砂の大変形時における粘性検証のための中空ねじりせん断試験  [通常講演]
    西村 聡, 本多 剛, 東畑郁生
    第36回地盤工学研究発表会 2001年 徳島

受賞

  • 2015年 日本港湾協会 論文賞
     
    受賞者: 高野 大樹;西村 聡;森川 嘉之;高橋 英紀
  • 2015年 地盤工学会北海道支部賞 北海道支部賞
     
    受賞者: 西村 聡
  • 2014年 地盤工学会 論文賞
     
    受賞者: 高野 大樹;西村 聡;竹花 和浩;森川 嘉之;高橋 英紀
  • 2013年 地盤工学会 研究奨励賞
     
    受賞者: 西村 聡
  • 2010年 英国土木学会(ICE) Manby Prize
     
    受賞者: Nishimura;S. Martin, C.J;Jardine, R.J;Fenton, C.H
  • 2008年 英国土木学会(ICE) Geotechnical Research Medal
     
    受賞者: Hight, D.W;Gasparre, A;Nishimura;S. Anh-Minh, N;Coop, M.R;Jardine, R.J

共同研究・競争的資金等の研究課題

  • 微視構造を核とした締固め土のパフォーマンス記述:盛土材料の耐侵食性向上を目指して
    科学研究費 基盤研究(B)
    研究期間 : 2018年 -2020年 
    代表者 : 渡部 要一
  • 凍結・融解による土の不可逆変化メカニズム解明へ、ミクロ~メソ可視化からの突破口
    科学研究費 挑戦的研究(萌芽)
    研究期間 : 2018年 -2019年 
    代表者 : 西村 聡
  • 多相力学・マルチスケール分析による気候変動下の高緯度寒冷地盤の広域災害リスク評価
    科学研究費 基盤研究(A)
    研究期間 : 2016年 -2019年 
    代表者 : 石川 達也
  • 記録的豪雨時の堤体性能評価のための間隙空気圧測定による水理・力学的動態観測および地盤調査
    一般財団法人北海道河川財団:助成金
    研究期間 : 2018年 -2018年 
    代表者 : 川尻 峻三
  • 河川堤防性能の長期担保に向けて:土質・気候に応じた境界・内部物理過程の解明
    科学研究費 基盤研究(B)
    研究期間 : 2016年 -2018年 
    代表者 : 西村 聡
  • 泥炭地盤上に建設された道路の長期沈下挙動のモデル化とLCC最小化の試み
    科学研究費 基盤研究(C)
    研究期間 : 2016年 -2018年 
    代表者 : 山添 誠隆
  • 2016年北海道豪雨で被災した堤体の性能評価のための水理・力学的動態観測および地盤調査
    一般財団法人北海道河川財団:助成金
    研究期間 : 2017年 -2017年 
    代表者 : 川尻 峻三
  • 地盤凍結・融解を合理的に記述する新しい工学
    公益財団法人戸田育英財団:研究助成金
    研究期間 : 2017年 -2017年 
    代表者 : 西村 聡
  • 千歳川堤防・遊水地堤を例とした堤体性能保証のための水理・力学的動態調査
    一般財団法人北海道河川財団:助成金
    研究期間 : 2016年 -2016年 
    代表者 : 西村 聡
  • 凍結土-常温土力学のシームレス化に向けた三相系熱土質力学の新たな展開と実証
    科学研究費 挑戦的萌芽研究
    研究期間 : 2015年 -2016年 
    代表者 : 西村 聡
  • 気候変動への対応を視野に入れた盛土内水位予測モデルの開発
    公益社団法人地盤工学会:道路保全地盤技術向上の調査・研究助成
    研究期間 : 2014年 -2015年 
    代表者 : 西村 聡
  • カルシア改質土の硬化メカニズムの解明と硬化後物性の予測
    公益財団法人鉄鋼環境基金:
    研究期間 : 2014年 -2015年 
    代表者 : 佐藤 努
  • ライフラインLCC低減への地盤工学的アプローチ:「柔な」複合型地盤改良と長期予測
    科学研究費 若手研究(B)
    研究期間 : 2013年 -2014年 
    代表者 : 西村 聡
  • 泥炭中地盤中にある管状構造物の沈下予測技術の向上
    北海道ガス:大学研究支援制度助成金
    研究期間 : 2013年 -2013年 
    代表者 : 西村 聡
  • 石狩湾をモデルケースとする海成堆積粘土の剛性構造の特徴解明
    公益財団法人北海道科学技術総合振興センター:研究開発助成事業補助金
    研究期間 : 2013年 -2013年 
    代表者 : 西村 聡
  • 固化改良による北海道地域軟弱土の耐震性能向上評価
    北海道ガス:大学研究支援制度助成金
    研究期間 : 2012年 -2012年 
    代表者 : 西村 聡
  • 自然硬質粘土の三次元剛性異方性に着目した新しい堆積・続成構造評価手法の提案
    科学研究費 若手研究(B)
    研究期間 : 2011年 -2012年 
    代表者 : 西村 聡

教育活動情報

主要な担当授業

  • Soil Mechanics(土質力学E)
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : Geomaterials, Deformation characteristics, Strength, Laboratory testing, Field testing, Constitutive model
  • 地盤物性学特論
    開講年度 : 2018年
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : Geomaterials, Deformation characteristics, Strength, Laboratory testing, Field testing, Constitutive model
  • Soil Mechanics(土質力学E)
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : Geomaterials, Deformation characteristics, Strength, Laboratory testing, Field testing, Constitutive model
  • 地盤物性学特論
    開講年度 : 2018年
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : Geomaterials, Deformation characteristics, Strength, Laboratory testing, Field testing, Constitutive model
  • 一般教育演習(フレッシュマンセミナー)
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 都市,社会基盤,経済,海洋,地盤,橋梁,道路,鉄道,港湾,防災,河川
  • 応用数学演習Ⅱ
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 複素数、複素関数、正則関数、複素積分、コーシーの定理、極、留数、留数定理、テイラー展開、ローラン展開、ベクトル積、スカラー積、スカラー場、ベクトル場、勾配、発散、回転、ガウスの定理、ストークスの定理
  • 応用数学Ⅱ
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : ベクトル積、スカラー積、スカラー場、ベクトル場、勾配、発散、回転、ガウスの定理、ストークスの定理、複素数、複素関数、正則関数、複素積分、コーシーの定理、極、留数、留数定理、テイラー展開、ローラン展開
  • 土の力学Ⅰ
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 土の基本的性質、土の分類、透水、地盤内応力、圧密
  • 国際交流Ⅱ
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 国際本部
    キーワード : ground investigation, unsaturated soils, seepage, ground stability analysis, liquefaction, underground structures, ground improvement
  • 地盤基礎工学
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 地盤調査,不飽和地盤,地盤の安定解析,地盤の液状化,地下構造物,地盤の改良
  • 土の力学演習
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 土の基本的性質、土中水と浸透、地盤内応力と変形、土の圧縮特性、圧密、応力とテンソルの基礎、せん断、排水強度と非排水強度、土圧、斜面の安定、地盤の支持力
  • 土木工学創成実験Ⅱ
    開講年度 : 2018年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 計画・遂行 結果解析 説明能力 土の物理的性質 土の透水性 土の圧縮性 土のせん断強さ 構造 解析 設計 模型作成 荷重試験 

大学運営

委員歴

  • 2018年 - 現在   地盤工学会   平成30年北海道胆振東部地震による地盤災害調査団幹事
  • 2018年 - 現在   地盤工学会   地盤工学会西日本豪雨地盤災害にかかる会長特別委員会委員
  • 2018年 - 現在   地盤工学会北海道支部   幹事長
  • 2018年 - 現在   札幌市   市民運動広場専門家委員会委員
  • 2018年 - 現在   地盤工学会   TC101国内委員会委員長
  • 2018年 - 現在   国際地盤工学会   TC101 Secretary
  • 2018年 - 現在   Institution of Civil Engineers, UK   Geotechnique Advisory Panel Member
  • 2017年 - 現在   地盤工学会北海道支部   北海道の地盤災害と防災技術に関する研究委員会委員
  • 2017年 - 現在   北海道   廃棄物処理施設検討会委員
  • 2017年 - 現在   北海道   原子力専門有識者会合メンバー
  • 2017年 - 現在   土木学会   論文集C分冊編集小委員会委員
  • 2016年 - 現在   北海道土木技術会   土質基礎研究委員会泥炭分科会幹事
  • 2016年 - 現在   地盤工学会   TC182国内専門委員会WG委員
  • 2016年 - 現在   地盤工学会   室内試験規格・基準委員会WG4委員
  • 2015年 - 現在   国土交通省北海道開発局   石狩川上流・天塩川上流・天塩川下流堤防調査委員会委員
  • 2015年 - 現在   地盤工学会   Soils and Foundations幹事委員
  • 2014年 - 現在   地盤工学会   国際部員
  • 2013年 - 現在   国土交通省北海道開発局   堤防技術委員会アドバイザー
  • 2013年 - 現在   Insitution of Civil Engineers, UK   Editorial Boad Member, Geotechnical Research
  • 2012年 - 現在   土木学会   英文論文集編集小委員会副幹事長
  • 2011年 - 現在   土木学会   地盤工学委員会堤防研究小委員会委員
  • 2011年 - 現在   地盤工学会北海道支部   地盤災害緊急対応委員会
  • 2010年 - 2018年   国際地盤工学会   TC101委員
  • 2016年 - 2017年   土木学会   水工学委員会2016年8月北海道豪雨災害調査団団員
  • 2016年 - 2017年   地盤工学会北海道支部   平成28年8月北海道豪雨による地盤災害調査団幹事長
  • 2016年 - 2017年   国土交通省北海道開発局   空知川堤防調査委員会委員
  • 2016年 - 2017年   地盤工学会   地盤工学会誌企画編集G
  • 2016年 - 2017年   土木学会   土木学会出版文化委員会委員
  • 2015年 - 2017年   地盤工学会北海道支部   気候変動に伴う積雪寒冷地の地盤災害リスクに関する研究委員会委員
  • 2014年 - 2017年   北海道   廃棄物処理施設専門委員会委員
  • 2013年 - 2015年   地盤工学会   地盤工学ジャーナル編集委員会委員
  • 2009年 - 2012年   地盤工学会   論文報告集編集委員会委員
  • 2008年 - 2010年   地盤工学会   学会誌編集委員会講座小委員会委員


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.