Method of Determining Confining Effect Parameter in Geogrid-Reinforced Walls

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  • KAWAMURA Takashi
    国際ジオシンセティックス学会日本支部 信州大学工学部 社会開発工学科
  • Umezaki Takeo
    国際ジオシンセティックス学会日本支部 信州大学工学部 社会開発工学科

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Other Title
  • ジオグリッド補強土壁における拘束効果パラメータの決定法に関する一考察

Abstract

The method of determining the confining effect parameter defined in the shear test of geogrid reinforced soil is discussed. The mechanism of increase in normal stress on sliding surface in the shear test of reinforced soil and increase in vertical stress in pull-out test of reinforcement in soil is examined. The ratio of the increase in vertical stress is calculated from previous pull-out test results, and its comparison with the confining effect parameter is carried out. Consequently, it is shown that both values are almost equal each other and that the confining effect parameter can be determined by pull-out test results.

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