地铁车站深基坑开挖施工阶段周边土体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周边土体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。

The Numerical Simulation of Soil Deformation Rule and Analysis of Deep Pit Excavation of Subway Station

Using deep pit excavation of some subway station as an example,the paper analyzes the 3-D numeral of deep pit excavation by equivalent stiffness method which the skirt pipe is equal to the finite element model formed by under-ground diaphragm wall,for the purpose of knowing the soil deformation around and mastering the law of internal force variation.By comparison,the results of numeral calculation are identical to the real numeral through measurement.The study shows that finite element software that is applied to numerical simulation of deep pit excavation and support is viable, which can provide engineer design and construction with right reference.