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Study on Three-dimensional Characteristics of Fill Failures for Safety Evaluation

Research Project

Project/Area Number 06650551
Research Category

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

Allocation TypeSingle-year Grants
Research Field Geotechnical engineering
Research InstitutionAichi Institute of Technology (A.I.T.)

Principal Investigator

NARITA Kunitomo  Aichi Institute of Technology, Fac.of Eng., Prof., 工学部, 教授 (90064956)

Co-Investigator(Kenkyū-buntansha) OKUMURA Tetsuo  Aichi Institute of Technology, Fac.of Eng., Ass.Prof., 工学部, 助教授 (70078913)
TATEBE Hidehiro  Aichi Institute of Technology, Fac.of Eng., Prof., 工学部, 教授 (10064940)
OHNE Yoshio  Aichi Institute of Technology, Fac.of Eng., Prof., 工学部, 教授 (00064931)
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: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥900,000 (Direct Cost: ¥900,000)
KeywordsStability Analysis / Centrifuge / Bearing Capacity / Earthfill Failure / Footing / Slope Stability / Three-Dimension / Failure Surface / 安定解析
Research Abstract

In order to study three-dimensional failure characteristics of fill and ground, centrifuge loading tests were first performed on level and slope sand foundations by changing the size of rectangular footing (zeta=L/B). Some remarks drawn in these tests were as follows ; (1) brittle failures showing sharp peak of load-settlement curve are observed as zeta increases, while the variation of the ultimate values of bearing capacity is small, (2) the shape factor reduces due to the decrease in zeta for level ground as proposed by DeBeer, whereas little change is seen in bearing capacity for slope foundation, (3) the size effect in the bearing capacity is observed in both level and slope foundations, (4) the existence of slope shows large difference in load bearing capacity, giving the value of 0.5 to 0.6 for the ratio between slope and level grounds ; (5) faiure surfaces observed in loading tests on sloping ground are clearly defined and they can be approximated mathematically in good accuracy by use of log-spiral curves.
In another series of centrifuge model tests for three-dimensional failure aptterns of earthfills constructed on the sloping valley, model fills were forced to slide by moving the front suppporting wall during a constant centrifuge circulation, and sliding planes were determined after the circulation stops by surveying the positions of intersecting points of noodle-type strings embedded in the model fill. It was recognized in the tests that (1) the size of sliding bodies, their depth and horizontal extension, becomes large as the width of the valley increases because of the decrease in the effect of lateral constraint, and (2) similar tendency is observed in the conventional stability analysis for the observed sliding plane, the three-dimensional safety factors becoming close to the two-dimensional ones as the valley with increases.

Report

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

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 奥村 哲夫: "砂地盤上基礎の支持力遠心実験" 平成6年度土木学会中部支部研究発表会講演集. 3-4 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 成田 国朝: "矩形載荷に伴う水平及び傾斜砂地盤の破壊形態と支持力特性について" 地盤破壊の三次元的評価に関するシンポジウム発表論文集. 173-178 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 研究委員会第2WG: "三次元一斉支持力実験報告書" 地盤破壊の三次元的評価に関するシンポジウム. 16-36 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 研究委員会第2WG: "三次元一斉支持力実験報告" 地盤破壊の三次元的評価に関する研究委員会. 2-63,247-283 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 成田 国朝: "砂地盤の三次元支持力特性に関する遠心模型実験" 第7回地盤工学シンポジウム(地盤工学会中部支部)論文集. 59-64 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 成田 国朝: "長大斜面の三次元すべり破壊特性に関する遠心模型実験" 愛知工業大学研究報告. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] OKUMURA Tetsuo: "Centrifuge loading thests on sand foundations" Heisei 6th Annual Meeting of Chubu Branch of JSCE. 3-4 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] NARITA Kunitomo: "Failure and Bearing Capacity Characteristics of Horizontal and Sloped Foundations in Rectangular Loadings" Symposium on Three-dimensional Evaluation of Ground Failures. 173-178 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] W.G.2 of T.C.: "A Report of Three-dimensional Model Tests of Bearing Capacity" Symposium on Three-dimensional Evaluation of Ground Failures. 16-36 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] W.G.2 of T.C.: "A Report of Three-dimensional Model Tests of Bearing Capacity" Technical Committee on Three-dimensional Evaluation of Ground Failures. 2-632 & 47-283. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] NARITA Kunitomo: "Centrifuge Model Tests on Three-dimensional Bearing Capacity of Sand Foundations" 7th Symposium on Geotechnical Eng. of Chubu Branch of JGS. 59-64 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] NARITA Kunitomo: "Centrifuge Tests on Three-dimensional sliding Failures of High Earthfill with Long Slopes" Technical Report of A.I.T.Vol.31B. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 奥村哲夫: "砂地盤上基礎の支持力遠心実験" 平成6年度土木学会中部支部研究発表会講演集. 3-4 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 成田国朝: "矩形載荷に伴う水平及び傾斜砂地盤の破壊形態と支持力特性について" 地盤破壊の三次元的評価に関するシンポジウム発表論文集. 173-178 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 研究委員会第2WG: "三次元一斉支持力実験報告" 地盤破壊の三次元的評価に関するシンポジウム. 16-36 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 研究委員会第2WG: "三次元一斉支持力実験報告書" 地盤破壊の三次元的評価に関する研究委員会. 2-63 247-283 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 成田 国朝: "砂地盤の三次元支持力特性に関する遠心模型実験" 第7回地盤工学シンポジウム(地盤工学会中部支部)論文集. 59-64 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 奥村 哲夫: "砂地盤上基礎の支持力遠心実験" 平成6年度土木学会中部支部研究発表会講演集. 3-4 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 成田 国朝: "矩形載荷に伴う水平及び傾斜砂地盤の破壊形態と支持力特性について" 地盤破壊の三次元的評価に関するシンポジウム. (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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