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.
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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2010年第6期721-725,共5页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(50679041)
上海市科委科技攻关资助项目(08201200903)
上海市重点学科建设资助项目(B208)
关键词
流固耦合
抽水试验
基坑降水
有限元方法
fluid-structure coupling
pumping test
dewatering in excavation
finite element mathod（FEM）
