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New development and validation of three-phase thermomechanics of soils explaining frozen-unfrozen transition behaviour

Research Project

Project/Area Number 15K14025
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Geotechnical engineering
Research InstitutionHokkaido University

Principal Investigator

Nishimura Satoshi  北海道大学, 工学研究院, 准教授 (70470127)

Co-Investigator(Kenkyū-buntansha) 所 哲也  苫小牧工業高等専門学校, 創造工学科, 准教授 (40610457)
Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords凍結土 / 強度 / 変形特性 / 地盤凍結 / 室内土質試験 / 凍土 / 地盤強度 / 地盤工学 / 土質力学
Outline of Final Research Achievements

A theory was proposed by which mechanical behaviour of soils at frozen, unfrozen and transitional states is described rationally and seamlessly, by coupling the principle of effective stress, thermodynamic equations, and other physical requirements. A suite of laboratory thermomechanical and physical experiments was conducted by focusing on a two-material, three-phase soil system (soil particles, liquid water and ice). The modelling theory systematically explains some characteristic features of frozen soil behaviour, such as the strength degradation by pressure-melting, apparent confining stress-dependency of the strength, etc., seen in clays and sands. This theoretical framework will allow developing a coupled simulator for advanced prediction of artificial ground freezing impacts and assessing cold-region natural disasters.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (10 results)

All 2017 2016 2015

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Interpretation of mechanical behavior of frozen clay through state concept2017

    • Author(s)
      Wang, J., Nishimura, S., Tokoro, T.
    • Journal Title

      Soils and Foundations

      Volume: 57 Issue: 2 Pages: 194-210

    • DOI

      10.1016/j.sandf.2017.03.003

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 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2017

    • Author(s)
      西村 聡・王 金元・佐々木飛翔
    • Organizer
      第52回地盤工学研究発表会
    • Place of Presentation
      名古屋国際会議場
    • Year and Date
      2017-07-12
    • Related Report
      2016 Annual Research Report
  • [Presentation] 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2017

    • Author(s)
      西村 聡・王 金元・佐々木飛翔
    • Organizer
      第57回地盤工学会北海道支部技術報告会
    • Place of Presentation
      北見工業大学
    • Year and Date
      2017-02-03
    • Related Report
      2016 Annual Research Report
  • [Presentation] A new approach to interpret strength characteristics of frozen clay under effects of temperature, strain rate and confining pressure2016

    • Author(s)
      Wang, J. and Nishimura, S.
    • Organizer
      第51回地盤工学研究発表会
    • Place of Presentation
      岡山大学
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] A new approach to interpret strength characteristics of frozen clay under effects of temperature, strain rate and confining pressure2016

    • Author(s)
      Wang, J. and Nishimura, S.
    • Organizer
      第51回地盤工学研究発表会
    • Place of Presentation
      岡山(岡山大学)
    • Year and Date
      2016-09-13
    • Related Report
      2015 Research-status Report
  • [Presentation] Interpretation of mechanical behavior of frozen clay through parallel tests of frozen and unfrozen soils2016

    • Author(s)
      Wang, J. and Nishimura, S.
    • Organizer
      International Mini Symposium Chubu
    • Place of Presentation
      名古屋大学
    • Year and Date
      2016-05-25
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interpretation of mechanical behavior of frozen clay through parallel tests of frozen and unfrozen soils2016

    • Author(s)
      Wang, J. and Nishimura, S.
    • Organizer
      International Mini Symposium Chubu
    • Place of Presentation
      名古屋(名古屋大学)
    • Year and Date
      2016-05-25
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theme lecture in session on “Data interpretation and geotechnical imaging”2015

    • Author(s)
      Nishimura, S.
    • Organizer
      6th International Symposium on Deformation Characteristics of Geomaterials
    • Place of Presentation
      ブエノスアイレス(ヒルトンブエノスアイレス)
    • Year and Date
      2015-11-16
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Mechanical behavior of frozen clay under effects of temperature and strain rate2015

    • Author(s)
      Wang, J. and Nishimura, S.
    • Organizer
      第50回地盤工学研究発表会
    • Place of Presentation
      札幌(北海道科学大学)
    • Year and Date
      2015-09-01
    • Related Report
      2015 Research-status Report
  • [Presentation] Mechanical behavior of frozen clay under constant- and varying-temperature and strain rate shear2015

    • Author(s)
      Wang, J. and Nishimura, S.
    • Organizer
      6th Japan-China Geotechnical Symposium
    • Place of Presentation
      札幌(北海道科学大学)
    • Year and Date
      2015-08-31
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2018-03-22  

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