地中壁在非对称超载深基坑中的应用研究

Application Research of Diaphragm Walls in Asymmetrically Overloaded Deep Foundation Pit

以地中壁在杭州地铁10号线新兴路站的应用为背景,利用PLAXIS 3D软件,建立三维有限元模型;通过改变地中壁间距、设置不同厚度的地中壁、调整地中壁插入坑底以下深度及地中壁入土深度,进行全施工过程的弹塑性分析,研究非对称超载下地中壁对围护结构侧移的影响。结果发现,地中壁的合理间距可以协调围护结构不对称变形,适当的插入深度可以提高坑底抗隆起稳定性。研究结果可为地中壁在以变形控制为目的的非对称超载深基坑工程中的应用提供依据。

Taking the application of diaphragm walls at Xinx⁃ing Road Station of Hangzhou Metro Line 10 as background,a three-dimensional finite element model is established using PLAXIS 3D software.By varying the spacing between dia⁃phragm walls,setting diaphragm walls with different thick⁃nesses,adjusting the insertion depth of diaphragm wall below the pit bottom,and modifying the buried depth of diaphragm wall into the soil,a comprehensive elastic-plastic analysis of the entire construction process is conducted.It is aimed to in⁃vestigate the influence of diaphragm walls on lateral displace⁃ment of retaining structures under asymmetric overloading con⁃ditions.The results indicate that an appropriate spacing be⁃tween diaphragm walls can coordinate the asymmetric defor⁃mation of retaining structures,and a suitable insertion depth can enhance the stability against pit bottom heave.The find⁃ings can provide a basis for the application of the diaphragm walls in asymmetrically overloadied deep foundation pit engi⁃neering aimed at deformation control.