环绕轨道交通车站深大基坑的数值模拟和实测分析

A Study of Numerical Simulation & Practical Analysis of Deep & Large Foundation Pit Surrounding Rail Transit Station

由于既有轨道交通保护要求较高,地块基坑开挖时需考虑对已建轨道交通的保护措施,通过充分考虑轨道交通与拟建基坑的净距,综合技术、经济等方面因素,采取对拟建地下空间分块分区对称开挖及对拟建基坑坑底土体加固的双重措施,是一个较佳选择。以上海临港新城滴水湖站交通枢纽工程(含配套地下空间)为背景,详细介绍该深基坑设计及施工对相邻轨道交通的影响情况及实测分析结果。

Because of high protection demands,protection measures should be considered in the excavation of foundation pit for existing rail transit.By fully considering the net distance of the rail transit and the proposed foundation pit,the comprehensive technical and economic factors,it is a better choice to take double measures of the proposed underground space block partition symmetrical excavation and the proposed foundation pit soil consolidation.With the background of Shanghai Lingang New City Dishui Lake Station traffic hub project(including supporting underground space),the design & construction of the deep foundation pit are introduced in detail,and the influencing conditions & practical analyzing results on surrounding rail transit are discussed in this paper.