中文摘要：

以上海500 kV世博地下输变电站为工程背景,以Biot固结理论为基础,采用数值方法对深基坑降水开挖过程进行了流固耦合分析.模拟抽水试验,并采用位移和孔压反分析法确定土层计算参数.建立流固耦合分析模型,分别采用稳态分析法和生死单元法模拟基坑的降水和开挖过程,同时求解出渗流场和位移场的变化.通过计算值与实测值的比较,证明了流固耦合方法分析基坑降水的正确性和可行性.

英文摘要：

On the background of 500 kV Shanghai Expo underground substation,a fluid-structure coupling FEM analysis of dewatering and excavation was made based on the Biot＇s consolidation theory.A pumping test was simulated to determine soil parameters by back-analysis of displacement and pore pressure.A fluid-structure coupling model was built to analyze dewatering and excavation with steady analysis method and birth-death element method respectively.Seepage and stress fields were solved at the same time.With comparison of the calculated and measured values,the fluid-structure coupling method used in the analysis of dewatering and excavation was proved to be correct and feasible.