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Progressive failure mechanism of soil structure reinforced by geosynthetics

Research Project

Project/Area Number 07305054
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section総合
Research Field Geotechnical engineering
Research InstitutionKanazawa University

Principal Investigator

OHTA Hideki  Kanazawa Univ.Civil Eng.Professor, 工学部, 教授 (80026187)

Co-Investigator(Kenkyū-buntansha) ARAI Katsuhiko  Fukui Univ.Civil Eng.Professor, 工学部, 教授 (00115289)
ASAOKA Akira  Nagoya Univ.Civil Eng.Professor, 工学部, 教授 (50093175)
TATSUOKA Fumio  Tokyo Univ.Civil Eng.Professor, 工学部, 教授 (70111565)
MOROTO Nobuchika  Hachinohe Inst.of Tech.Professor, 工学部, 教授 (00105545)
IIZUKA Atsushi  Kanazawa Univ.Civil Eng.Associate Professor, 工学部, 助教授 (40184361)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1996: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywordsreinforcement / geosynthetics / test embankment / dilatancy of soil / deformation / strength / 締固め土 / 安定解析 / 変形解析 / 土工 / 有限要素法 / 一面せん断試験
Research Abstract

A full scale test embankment was constructed for the aim of examining the reinforcement mechanism by geosynthetics and the in-situ experiment was carried out for the period from July to October, 1996, in Kanazawa. The test embankment was designed so as to realize a beam shape soil structure reinforced by geosynthetics in one side and an over-hanging slope with 60 degree in another side of the embankment. The deformation of the structure and the strain working on the reinforcement materials installed in the embankment were measured during the experiment. It was found that the confining effect much contributed to the increase of stiffness and strength of soil structure reinforced by geosynthetics. The technique of numerical simulation of mechanical behavior of soil structure reinforced by geosynthetics has been developed. The dilatancy characteristics (particularly positive dilatancy) of soil material must be taken into account in the numerical simulation by finite element computation. The geosynthetics wrapping the soil works so as to prevent the dilation of soil when the shear stress was applied. And, as a result, the effective stress increases and the stiffness and strength of the soil structure are improved. Such mechanism has not yet been taken into consideration in the current design procedure. This task has been still left as a question.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Hideki Ohta et. all.: "Numerical simulation of beam-shaped soil structure reinforced geosymthetics." Earth Reinforcement, Proc. Int. Symp. on Earth Reinforcement. 255-260 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hideki, OHTA et all.: "Numerical simulation of beam-shaped soil sturucture reinforced by geosynthetics" Earth Reinforcement, Proc.Int.Symp.on Earth Reinforcement. 255-260 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hideki Ohta et all.: "Numerical simulation of beam-shaped soil structure reinforced by geosymrhetics." Earth Reinforcement.Proc.Int.Symp.on Earth Rrinforcement. 255-260 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Sami COREN and Hideo OHTA: "Field Behavior of the Sand Beam Reinforced by Geosynthetics" 第28回土質工学研究発表会. 19-22 (1993)

    • Related Report
      1995 Annual Research Report
  • [Publications] 森影篤史、太田秀樹他: "締固め土の先行圧縮応力と応力履歴による強度の推定手法の適用性" 土木学会第48回年次学術講演会概要集. 1246-1247 (1993)

    • Related Report
      1995 Annual Research Report
  • [Publications] Sami GOREN.,Hideki OHTA: "Performance of test embankment reinforced by Geosynthetics" 第29回土質工学研究発表会. 25-28 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山岸克彰,太田秀樹: "オーバーハングした斜面を持つ補強盛土における安定解析" 土木学会第49回年次学術講演会概要集. 1658-1659 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Sami GOREN.,Hideki OHTA: "Large Scale Direct Shear Test With Grid Reinforced Empankment; A Record of Observation" 第30回土質工学研究発表会. 37-40 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 太田秀樹、飯塚敦: "梁形状のジオシンセティック補強土構造物の力学挙動" 第40回地盤工学シンポジウム. 331-338 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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