某地铁车站深基坑开挖施工阶段围护结构变形规律数值模拟与分析

以某地铁车站深基坑工程为例,采用等效刚度法将围护桩等效为地下连续墙建立有限元模型对基坑开挖过程进行了三维数值分析,得到了深基坑施工过程中维护结构的变形及内力变化规律。将数值计算结果与实测值进行了比较,二者基本吻合。研究表明,有限元软件用于基坑开挖与支护的数值模拟是可行的,能够为工程设计与施工提供正确参考。

SIMULATION AND ANALYSIS OF DEFORMATION OF RETAINING STRUCTURE IN CONSTRUCTION PHASE OF A DEEP EXCAVATION OF A SUBWAY STATION

The paper takes deep excavation of a subway station as an example, uses equivalent stiffness method is equivalent to the PILE of underground continuous wall and finites element model of the excavation process in threedimensional numerical analysis, Obtained deep foundation construction process to maintain the structure variation of the deformation and internal force. The numerical results are basically consistent with the measured values. Studies have shown that it is feasible to finite element software for pit excavation and support of the numerical simulation, it will able to provide engineering design and construction to provide correct information.