苏州地铁车站基坑变形特性分析  

Deformation characteristics of foundation pits of subway stations in Suzhou

作　　者：武朝军[1] 陈锦剑[1] 叶冠林[1] 王建华[1] 周洪波[2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海建科建设监理咨询有限公司,上海200032

出　　处：《岩土工程学报》2010年第S1期458-462,共5页Chinese Journal of Geotechnical Engineering

摘　　要：首先介绍苏州地铁一号线沿线的水文地质条件,并与拥有流塑软土地层的上海地区作比较,对苏州的地质进行了初步定位;然后对典型车站基坑的实测数据进行统计,发现以地下连续墙或咬合桩为围护结构的顺作法车站基坑围护结构最大侧移平均值均约为0.16%H,墙后最大地表沉降平均值为0.13%H;最后用三维数值分析的方式对具有代表性的苏州乐园站基坑的施工进程进行数值模拟,发现随着开挖深度的增加,开挖至坑底后围护墙下端出现明显的踢脚现象。从苏州地铁一号线建设中总结的这些成果对苏州地区今后的地铁车站建设具有借鉴意义。The current studies on foundation pits are reviewed.Compared with those in Shanghai,the hydro-geological conditions in Suzhou are analyzed.The excavation faces are located on ⑤3 with poor geological conditions.The measured data of a typical foundation pit indicate that the average maximum displacement of the building envelope by use of diaphragm walls or secant piles is about 0.16%H,and the average settlement of ground is 0.13%H.Three-dimensional numerical analysis is employed to simulate the process of the excavation of the representative station,Suzhou Leyuan Subway Station.It is found that the displacement of the toe of diaphragm walls is relatively large.The conclusions from the construction of the Subway Line One of Suzhou will be contributing to the future construction of subway stations in Suzhou.

关 键 词：苏州地铁 地铁车站 基坑 变形 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]