灌注桩深基坑的有限元计算及影响因素分析

对苏州市轨道交通2号线金民东路站深基坑使用灌注桩作为支挡结构的开挖、支护施工进行了有限元数值模拟,据此分析了灌注桩内力、水平侧移等随施工过程的变化以及主体结构的内力情况,并研究了灌注桩刚度、地基土刚度对支护结构侧移和弯矩的影响,对实际施工起到一定的指导作用。

Finite Element Calculation and Factors Analysis of Filling Pile Deep Foundation Ditch

The numerical simulations by 2D FEM are carried out for excavation and supporting of deep foundation ditch of Jinmin East Street Station on Suzhou Metro Line 2,in which filling piles are used as the bracing structure.According to the calculation results,the analysis is given in the internal force of major structures,the internal force and horizontal displace- ments of the filling pile with the change of the construction process.The influences on displacements and bending moment of protective structures caused by stiffness of filling piles and the foundation soil are also researched,which will guide the real construction well.