This paper presents the effects of soil liquefaction on design response spectrum in terms of effective stress theory by considering the thickness and depth of sand layer, and the earthquake intensity.
本文采用有效应力原理分析了液化土层对设计反应谱的影响，分析中考虑了砂层的厚度、埋深和输入地震动等因素。
For levees on double layer foundation, adding weighting soil to the landside slope is an effective measures to prevent the foundation from seepage failure.
在双层地基河堤背水侧采用盖重土层是一种有效的防止渗透变形的措施。
Sensitivity of some effective factors on supporting pile with single layer of bracket in even soil is analyzed.
以匀质土中的单层内支撑支护桩为对象进行敏感性分析。
All the results enunciation: (1) the thicker the soft soil layer is, the smaller the reinforcement effect is, and the reinforced sand blankets is not effective to treat thick soft ground.
结果表明：(1)软土层越厚，加筋效果越不明显，且采用加筋砂垫层加固深厚软基是不合适的。
All the results enunciation: (1) the thicker the soft soil layer is, the smaller the reinforcement effect is, and the reinforced sand blankets is not effective to treat thick soft ground.
结果表明：(1)软土层越厚，加筋效果越不明显，且采用加筋砂垫层加固深厚软基是不合适的。
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