内部侵食が地盤の変形・強度特性に及ぼす影響の定量的評価  [in Japanese] Effects of internal erosion on mechanical properties of soil  [in Japanese]

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Author(s)

Abstract

内部侵食は地盤中の細粒分が浸透水流により抜け出す現象であり,大規模に発生すれば時地滑りや陥没事故などの土砂災害を引き起こす.本研究では三軸試験装置内で侵食を発生させる装置を新たに開発した.侵食による変形や剛性の変化を各種センサーで計測し,侵食終了後に排水せん断を行うことで侵食が地盤の力学特性に与える影響を定量的に評価した.排水せん断における軸ひずみ5% 程度までの中ひずみ領域においては,剛性が少量の侵食によっても低下する事が示された.

Internal erosion causes various ground disaster such as sinkhole accidents and landslides, those are supposed to happen due to water penetration in the ground. In this research, triaxial test apparatus which are capable of causing internal erosion inside the specimen was developed. Eroded specimen was sheared in drained condition. It was found that at axial strain within 5 %, soil stiffness was decreased due to even small degree of erosion.

Journal

  • SEISAN KENKYU

    SEISAN KENKYU 66(4), 325-329, 2014

    Institute of Industrial Science The University of Tokyo

Codes

  • NII Article ID (NAID)
    130004691219
  • NII NACSIS-CAT ID (NCID)
    AN00127075
  • Text Lang
    JPN
  • Journal Type
    大学紀要
  • ISSN
    0037-105X
  • NDL Article ID
    025809906
  • NDL Call No.
    Z14-198
  • Data Source
    NDL  J-STAGE 
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