复合桩墙支护结构变形的有限元分析

Finite element analysis of deformation of compound pile walls

复合桩墙支护结构是一种新型的复合型支护结构,它在节省地下空间资源、减小土体位移、保护周边环境、缩短施工工期等方面有良好的表现。针对单排小桩的复合桩墙支护结构建立了有限元模型,通过模拟基坑开挖工程中的不同工况,对该支护结构的水平侧移、墙后土体沉降等进行了讨论。分析了随开挖工况的增加复合桩墙支护结构的水平位移、墙后土体沉降变化状态及土体总体位移趋势,这为掌握该支护结构支护性能及开挖变形特点提供有益帮助。

The compound pile wall is a new composite supporting structure.It has good performance in saving the underground space,reducing the displacement of the soil,protecting surrounding environment,and shortening the period of the engineering. A two-dimensional finite element analytic model of the compound pile wall was established.By simulating different work conditions of the excavating process,the horizontal lateral displacement of the compound pile wall and the settlement of soil behind it were discussed.The horizontal lateral displacement of the compound pile wall,the settlement of soil behind the wall and the displacement trend of the soil were analyzed.It is helpful to know the performance of such supporting stucture.