DECREASE IN EFFECTIVE STRESS AND RECONSOLIDATION OF SATURATED CLAY INDUCED BY CYCLIC SHEAR

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  • 繰返しせん断によって生じる飽和粘土の有効応力減少と再圧密沈下特性
  • クリカエシ センダン ニ ヨッテ ショウジル ホウワ ネンド ノ ユウコウ オウリョク ゲンショウ ト サイ アツミツ チンカ トクセイ

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Abstract

To find a simple method for predicting the post-earthquake settlement of clay layer, the settlement characteristics in the recompression stage following the undrained cyclic shear were observed. Tested samples were kaoline and reconstituted marine clays. In conclusion, 1) the smaller the plasticity index of clay, the larger the decrease in effective stress during the cyclic shear and also the larger settlement during the recompression stage was observed, 2) when the amplitude of cyclic shear strain is small, the settlement-time relations are similar to those for the over consolidated clay, 3) the apparent earthquake-induced subsidence in the alluvial clay layer in the Port Island, Kobe, Japan, was observed.

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