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RESEARCH ON DEFORMATION AND STRENGTH CHARACTERISTICS OF SANDS AND SOFT ROCK GROUND UNDER HIGH PRESSURE CIRCUMSTANCE.

Research Project

Project/Area Number 02452195
Research Category

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

Allocation TypeSingle-year Grants
Research Field 基礎・土質工学
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

TOKI Shosuke  Hokkaido University Faculty of Engineering, Professor., 工学部, 教授 (50001136)

Co-Investigator(Kenkyū-buntansha) YAMASHITA Satoshi  Hokkaido University Faculty of Engineering, Assistant., 工学部, 助手 (00174673)
MIURA Kinya  Hokkaido University Faculty of Engineering, Associate Professor., 工学部, 助教授 (40190582)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1992: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1991: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1990: ¥3,100,000 (Direct Cost: ¥3,100,000)
KeywordsBearing Capacity / Deformation / Mechanical Characteristic / Sand / Soft Rock / Strength / Physical Characteristic / Primary property / 砂質土 / 変形・強度特性 / 粒土分布 / 粒子の破砕性 / 拘束圧依存性 / 褶曲作用 / 降伏圧力 / 粒度分布
Research Abstract

A series of experimental and analytical examinations was carried out to investigate the effects of several influencing factors, such as stress state, primary properties of sand particles, physical and mechanical properties of sands, on the deformation-strength behavior of sands and soft rocks.
For sands, 200 kind of sand samples with different primary properties were prepared.
The relationships between the index properties, such as grain density, shape and size distribution were investigated, It was proven, that some index properties such as maximum and minimum void ratio, crushability characterize physical property of sands.
The significant influence of the primary properties on the deformation-strength characteristics was also clarified, From the test results, the relationships of deformation-strength properties of sands with index physical properties are discussed ; the significant influence of grain shape, grading and crushability on the mechanical behaviors are presented.
To investiga … More te the strength-deformation characteristics of soft rock, samples from horizontal and vertical directions were secured from the dam construction site, where strata were folded by horizontal thrust. Interesting information on the anisotropic characteristics of permeability, failure and residual triaxial strength, and yielding confining pressure were obtained. Significant effects of stress history on the mechanical behavior of soft rock, were pointed out.
Deformation and failure mechanism of soft rock ground were investigated by several series of loading tests on model circular footing on artificial soft rock grounds. The effects of geometry of ground, footing size, mechanical properties of ground materials and relative position of footing from the top of slope were examined in connection with the type of failure mode ; general shear mode or large deformation with punching failure mode.
Modified slice method was proposed and applied to the calculation of the ultimate bearing capacity of circular footing beside slope. While 2-dimentional calculation gave unacceptable under estimate, 3-dimentional calculation gave the reasonable estimate for the variation of ground material, slope angle, and the vicinity of the footing to the slope. Less

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] 土岐祥介: "褶曲作用による軟岩の異方性" 土質工学研究発表会論文報告集. 26巻. 1159-1162 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 土岐祥介: "褶曲作用による軟岩の異方性(II)" 土質工学研究発表会論文報告集. 27巻. 1261-1264 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 前田健一: "砂の粒子破砕測定方法" 新しい土の物理的性質試験方法に関するシンポジウム発表. 121-128 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 前田健一: "一次的性質の異なる砂の変形・破壊強度の拘束圧依存性" 土質工学研究発表会論文報告集. 28巻 (発表予定). (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miura K.: "Mechanical Characteristics of Sands with Different Primary Properties." Soils and Foundation. (To be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miura K.: "Physical Characteristics of Sands with Different Primary Properties." Soils and Foundation. (To be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nishimura M.: "Failure Mechanism in Rock Ground Observed in Model Footing Test." Proc.of the Int.Symposium on Deformation and Progressive Failure in Geomechanics.(to be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miura K.: "Method of Measurement for the Angle of Repose of Sand." Soils and Foundation.(to be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Toki S.: "Anisotropy of Soft Rock Induced by Folding. (in Japanese)" Proc., of the Annual Meeting of JSSMFE. Vol.26. 1159-1162 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Toki S.: "Anisotropy of Soft Rock Induced by Folding (II). (in Japanese)" Proc., of the Annual Meeting of JSSMFE. Vol.27. 1261-1264 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Maeda K.: "Dependency of Deformation and Strength Behavioor of Sand with Different Primary Properties on confining pressure (in Japanese)" Proc.of the Annual Meeting of JSSMFE. Vol.27. 121-128 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Maeda K.: "Test Method for Crashability of Soil Particles. (in Japanese)" Proc.of the Symposium on New Test Methods for Mechanical Properties of Soils. 1992. 121-128

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miura K.: "Mechanical Characteristics of Sands with Different Primary Properties." Soils and Foundation. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miura K.: "Physical Characteristics of Sands with Defferent Primary Properties." Soils and Foundation. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Nishimura M.: "Failure Mechanism in Rock Ground Observed in Model Footing Test." International Symposium on Deformation and Progressive Failure in Geomechanics.(to be Published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miura K.: "Method of Measurement for the Angle of Repose of Sand." Soils and Foundation.(to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 前田 健一: "砂粒子が構成する楕円構造体の変形解析" 土質工学研究発表会論文報告集. 28. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 前田 健一: "一次的性質の異なる砂の変形・破壊挙動の相対密度依存性" 土質工学研究発表会論文報告集. 28. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 谷瀬 敦: "人工軟岩の支持力模型実験" 土質工学研究発表会論文報告集. 28. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 前田 健一: "二次元応力下における楕円構造体の主ひずみ方向" 土木工学年次学術講演会. 28. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 三浦 均也(分担): "新土木実験指導書・土質編" 技報堂出版, 276 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 土岐 祥介: "褶曲作用による軟岩の異方性II" 土質工学研究発表会論文報告集. 27. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 健一: "砂粒子が構成する楕円構造の破壊条件" 土質工学研究発表会論文報告集. 27. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 健一: "一次的性質の異なる砂の変形・破壊挙動の拘束圧依存性" 土質工学研究発表会論文報告集. 27. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 前田 健一: "2つの試験方法による砂の粒子破砕特性" 土質工学研究発表会論文報告集. 27. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 土岐 祥介: "褶曲作用を受けた軟岩の変形・強度特性と透水性" 土質工学会北海道支部技術報告集. 31. 77-86 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 土岐 祥介: "褶曲作用による軟岩の異方性" 土質工学研究発表会論文報告集. 26. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 三浦 均也: "一次的性質の異なった砂の変形・破壊挙動" 土質工学研究発表会論文報告集. 26. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 前田 健一: "変形・破壊挙動の密度依存性と砂の一次的性質の影響" 土質工学研究発表会論文報告集. 26. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 前田 健一: "砂の除荷時の変形特性に及ぼす一次的性質の影響" 土質工学研究発表会論文報告集. 26. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 松本 吉英: "異方性砂の砂の安息角と一次的性質との関係" 土質工学研究発表会論文報告集. 26. (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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