某临轨道交通深基坑地下连续墙优化分析

Optimisation Analysis of Diaphragm Wall in Deep Foundation Pit near Rail Transit

本工程位于苏州市区,紧邻轨道交通1号线,基坑开挖深度约18.1 m,采用地下连续墙+支撑的支护形式。文章从支护结构体系稳定性及止水作用两个方面确定地下连续墙入土深度,结合钢筋笼吊装过程的稳定性、混凝土浇筑时型钢接头的变形,对地下连续墙钢筋笼配置进行优化。

The project is located in the urban area of Suzhou,adjacent to rail transit line 1.The excavation depth of the foundation pit is about 18.1 m,and the support form of“diaphragm wall and support”is adopted.This paper determines the depth of diaphragm wall from the stability of supporting structure system and water stop function,and optimizes the reinforcement cage configuration of diaphragm wall combined with the stability of reinforcement cage hoisting process and the deformation of steel joint during concrete pouring.