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EXPLICATION OF PROGRESS FAILURE IN SLOPE STABILITY AND ITS ANALYSIS WITH STRAIN-SOFTENING CONSTITUTIVE EQUATION

Research Project

Project/Area Number 06452268
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Geotechnical engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

ADACHI Toshihisa  Kyoto University, Graduate School of Engineering, Professor, 工学部, 教授 (20026173)

Co-Investigator(Kenkyū-buntansha) TATEYAMA Kazuyoshi  Kyoto University, Graduate School of Engineering, Lecturer, 工学部, 講師 (10179731)
YOSHIDA Nobuyuki  Kyoto University, Graduate School of Engineering, Lecturer, 工学部, 講師 (20166961)
MIMURA Mamoru  Kyoto University, Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (00166109)
KIMURA Makoto  Kyoto University, Graduate School of Engineering, Associate Professor, 工学部, 助教授 (30177927)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1995: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsSlope stability / Progress failure / Numerical analysis / Centrifuge / Constitutive model / 数値解析 / 斜面 / ひずみ軟化 / 数値解析法 / 遠心模型実験 / 三軸圧縮試験 / 時間依存性挙動
Research Abstract

The slope failure, composed by the soft rock or over-consolidated clay, can be considered to be induced as the results of the progressive failure in which the local failure is generated by non-homogeneous distribution of stress at a local point inside the slope at the start, and it progressively propagates to other parts in the slope. We tried to obtain an analytical model with which the slope failure can be simulated as a progressive failure phenomenon.
At the first step of the research, we investigated the time-dependent behavior of soft rock and over-consolidated clay and the effects of physicochemical fissure behavior to the strain-hardening-softening behavior through some experiments such as the triaxial tests. The hardening-softening type of the constitutive equation, which had been proposed by the head investigator, et al., was extended, on the base of the experimental results, to be able to express both the time-dependent behavior and the physicochemical fissure behavior.
At the second step, the boundary value problem was discussed by applying the extended constitutive equation to the slope failure phenomenon and creating the analytical model for it. Some model cases of the slope failure were simulated by a few methods and the optimum simulating method was obtained to express the progressive failure phenomenon.
At the third step, the model experiments were carried out by using centrifuge. In the experiments, though the progressive failure phenomenon of both the excavated and natural slope was tried to reproduce the progress failure in a centrifuge force field, the conclusive results have not been obtained yet until the current stage.
The continuous research will be carried out to apply the results of the research not only to the rational design, construction and maintenance of slopes but also to the prediction of the slope failure.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] N. Yoshida: "Analysis of progressine behaviour of cut slopes in day shales exhibiting softening" Rock Mechanics(Daemen Schultz (eds)). 825-830 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 足立紀尚: "ひずみ軟化型弾塑性構成式とBiotの圧密理論を用いたトンネル掘削における数値解析" 第7回中部支部地盤工学シンポジウム論文集. 105-110 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T. Adachi: "Stress-Strain Behaviour and yield characteristics of Eastern Osaka clay" Soils and Foundations. Vol.35 No.3. 1-13 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T. Adachi: "Progressive failure of cut-slope-softening and water coupled" Proc. of the 5th KU-KAIST-NYU TRI-Lateral Seminor. 159-164 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 足立紀尚: "ひずみ軟化型弾塑性構成式とBiotの圧密理論を用いた斜面掘削における数値解析" 第40回地盤工学シンポジウム平成7年度論文集. 105-110 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N.Yoshida: "Analysis of progressive behavior of cut slopes in clay shales exhibiting softening" Rock Mechanics (Damen Schultz (edsi)). 825-830 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Adachi: "Numerical analysis of Biot consolidation problem based on an elasto-plastic constitutive model with strain softening in tunneling" Proc.of the 7th Symposium on the Geotechnical Engineering in Tyubu Branch of Japanese Geotechnical Society. 105-110 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Adachi: "Stress-strain behavior and yield characteristics of eastern Osaka clay" Soils and Foundations. Vol.35, No.3. 1-13 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Adachi: "Progressive failure of cut-slope-softening and water coupled" Proc.of the 5th KU-KAIST-NTU Tri-Lateral Seminor on Civil Engineering. 159-164 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Adachi: "Numerical analysis of Biot consolidation problem based on an elasto-plastic constitutive model with strain softening in soil excavation" Proc.of the 40th Symposium on the Geotechnical Engineering. 105-110 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N. Yoshida: "Analysis of progressive behaviour of cut slopes in clay shalesexhibiting scftening" Rock Mechanics (Daemen Q Schultz cedsj). 825-830 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 足立紀尚: "ひずみ軟化型弾塑性構成式とBiotの圧密理論を用いたトンネル掘削における数値解析" 第7回中部支部地盤工学シンポジウム論文集. 105-110 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T. Adachi: "Stress-Strain Behaviour and Yield Characteristics of Eastern Osaka Clay" Soil and Foundations. Vol. 35, No. 3. 1-13 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T. Adachi: "Brogressive failure of cut-slope-softening and water coupled" Proc. of the 5th KU-KAIST-NYU TRI-Lateral Seminar. 159-164 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 足立紀尚: "ひずみ軟化型弾塑性構成式とBiotの圧密理論を用いた斜面掘削における数値解析" 第40回地盤工学シンポジウム平成7年度発表論文集. 105-110 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Adachi,T.: "An elasto-viscoplastic constitutive model with strain softening and its application to the progressive failure of a cat slope" AMD,ASME. Vol.183. 203-217 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 足立 紀尚: "ひずみ軟化型弾-粘塑性構成式によるモデル地盤における進行性破壊の解析" 土木学会第49回年次学術講演会概要集. Vol.1. 868-869 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 足立 紀尚: "地盤材料の弾-粘塑性構成式の誘導とその適用性について" 第29回土質工学研究発表会講演集. Vo.2. 1227-1230 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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