门架式水利插板桩支护结构的有限元分析

Finite Element Method Analysis of Water Injection Sheet Pile Shoring Model

运用有限元计算方法并考虑分步开挖的情况下对门架式水力插板桩在前后桩长度不同、间距不同条件下的计算模型进行分析。给出门架式水利插板桩在上述不同条件下的桩侧水平位移及桩身弯矩的变化规律,得出一些有实际意义的结论。通过计算给出门架式水利插板桩前后排桩的相对设计长度,建议后排桩设计长度为1/3 h≤b≤1/2 h;同时给出前后排桩间距的取值范围,建议前后排桩合理间距为1/8 A≤d≤1/4h。

In this paper,the finite element method is employed to analyze Water Injection Sheet Pile with dif- ferent pile lengths and row spacings under step excavation.The horizontal displacement and bending moment of front row pile under different conditions are obtained successfully.The simulation results provide a valuable ref- erence for the design and construction of deep excavation works.The relative length of the back row pile is ad- visable to satisty 1/3 h≤b≤1/2 h,and the row spacing is better to follow 1/8 h≤d≤1/4 h,h heing the front row pile length.