Estimation of Shear Strain in the Ground Induced bu Mt. Usu Volcanic Eruption in 2000

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  • 2000年有珠山噴火による地盤内せん断ひずみ分析の推定
  • 2000年有珠山噴火による地盤内せん断ひずみ分布の推定
  • 2000ネン ウスザン フンカ ニ ヨル ジバン ナイ センダンヒズミ ブンプ ノ スイテイ

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Estimation of shear strain in the ground induced by Mt. USU volcanic eruption in 2000 and the physical and shear strength characteristics of volcanic ashes are discusscd. The disturbcd samples of volcanic ashes were taken from the different six places near the volcanic crater, A series of test for physical properties and the direct shear test were performed. From the test results, it was shown that the properties of the almost all valcanic ashes by eruption in this time were similar to clayey properties. It was shown that the distribution of shear strain in the ground can be estimated easily based on the information of the crack width of foundation piles, N value by SPT, and so on.

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