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Application of Effective Stress Model to Analysis of Liquefaction and Seismic Performance of an Earth Dam in China

机译：有效应力模型在我国土坝液化及抗震性能分析中的应用

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摘要

Earthquake-induced liquefaction is one of the major causes of catastrophic earth dam failure. In order to assess the liquefaction potential and analyze the seismic performance of an earth dam in Fujian, Southeastern China, the in situ shear wave velocity test was firstly carried out. Results indicate that the gravelly filling is a type of liquefiable soil at present seismic setting. Then the effective stress model was adopted to thoroughly simulate the response of the soil to a proposed earthquake. Numerical result generally coincides with that of the empirical judgment based on in situ test. Negative excess pore pressure developed in the upper part of the saturated gravelly filling and positive excess pore pressure developed in the lower part. The excess pore pressure ratio increases with depth until it reaches a maximum value of 0.45. The displacement of the saturated gravelly soil is relatively small and tolerable. Results show that the saturated gravelly filling cannot reach a fully liquefied state. The dam is overall stable under the proposed earthquake.
机译：地震引起的液化是灾难性大坝破坏的主要原因之一。为了评估液化潜力并分析中国福建东南部土坝的抗震性能，首先进行了原位剪切波速试验。结果表明，在目前的地震环境下，砾石充填是一种可液化的土壤。然后采用有效应力模型来全面模拟土壤对拟建地震的响应。数值结果通常与基于原位测试的经验判断相吻合。在饱和砾石充填的上部产生负的超孔隙压力，在下部产生正的超孔隙压力。多余的孔隙压力比随深度增加，直到达到最大值0.45。饱和砾石土的位移相对较小且可以忍受。结果表明，饱和砾石充填不能达到完全液化状态。在拟议的地震下，大坝总体稳定。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第12期|404712.1-404712.7|共7页
  • 作者

    Qi Changqing; Lu Wei; Wu Jimin; Liu Xing;

  • 作者单位

    Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.;

    Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.;

    Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.;

    Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China.;

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