松粉砂地基地震后堤坝稳定性分析  

Post-earthquake stability analysis of dike built on silty sand foundation

作　　者：王媛[1] 姜朴[1] 朱俊高[1] 孔彩粉[2] 

机构地区：[1]河海大学土木工程学院岩土所,江苏南京210098 [2]黄河水利委员会勘测规划设计研究院,河南郑州450003

出　　处：《水利学报》2000年第11期60-64,69,共6页Journal of Hydraulic Engineering

基　　金：水利部重点资助项目

摘　　要：本文在试验研究松砂静动力孔压上升曲线、不排水剪切过程中应力应变软化曲线和稳态强度等的基础上 ,基于地震结束后应力、孔压重分布的思想 ,采用有效应力有限元法 ,对某一堤坝及坝基进行了地震后液化区扩展及整体稳定性分析 ,表明本文所建议方法的可行性 ,揭示了进行地震后液化分析和安全性评价的重要性 .On the basis of experimental research on strain\|softening behavior of loose sand under undrained condition,the steady\|state strength concept and a strain\|softening model are proposed.The effective stress FEM is adopted to analyze the post\|earthquake stability of the liquefaction expanding zone as well as the whole section of a typical dike including its foundation,in consideration of the redistribution of stress and pore\|water pressure.The result shows that the proposed method is feasible for practical use.

关 键 词：堤坝 地震后分析 液化 稳定性 松粉砂地基 

分 类 号：TV871[水利工程—水利水电工程] TU435[建筑科学—岩土工程]