非塑性細粒分を含む砂礫の非排水せん断特性  [in Japanese] UNDRAINED SHEAR CHARACTERISTICS OF SANDY-GRAVEL CONTAINING NON-PLASTIC FINES  [in Japanese]

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Abstract

細粒分含有率の異なる砂礫材料について, 三軸試験機を用いた非排水せん断試験を行い, 細粒分含有率や相対密度が砂礫の非排水せん断特性に与える影響を調べた. 非排水繰返し載荷試験および単調載荷試験結果から, 液状化強度および単調載荷時の最大偏差応力は, 同程度の相対密度を有する供試体においても細粒分含有率が0%から10%まで増加する間に大幅に低下することがわかった. このように砂礫に非塑性細粒分が混入した場合, 地震による繰返し載荷時や単調載荷時の非排水せん断特性が大幅に変化するので, その影響を適切に評価することが重要であることが明らかになった.

A series of undrained shear triaxial tests were performed in this study on sandy-gravel materials with different fines content and different relative density. According to the undrainened cyclic and monotonic loading triaxial tests, liquefaction strength and maximum deviatoric strength considerably reduce as the fine content increases from 0% to 10% having the same relative density. It clarified in this research that, when non-plastic fines are mixed in sandy-gravel, undrained shear characteristics in cyclic loading and monotonic loading for virgin or post-liquefaction soils largely change. Hence, it is important to evaluate the influence of fines fraction on the undrained strength properties appropriately.

Journal

  • Doboku Gakkai Ronbunshu

    Doboku Gakkai Ronbunshu (785), 123-132, 2005-03-21

    Japan Society of Civil Engineers

References:  26

Codes

  • NII Article ID (NAID)
    10014003499
  • NII NACSIS-CAT ID (NCID)
    AN10014020
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    02897806
  • NDL Article ID
    7288722
  • NDL Source Classification
    ZN1(科学技術--建設工学・建設業)
  • NDL Call No.
    Z16-6
  • Data Source
    CJP  NDL  J-STAGE 
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