徐家汇地铁站深基坑降水数值模拟与沉降控制  

Numerical simulation of deep foundation pit dewatering and land subsidence control of Xujiahui Metro Station

作　　者：周念清[1] 唐益群[2] 娄荣祥 江思珉[1] 

机构地区：[1]同济大学水利工程系,上海200092 [2]同济大学地下建筑与工程系,上海200092 [3]上海广联建设发展有限公司,上海200438

出　　处：《岩土工程学报》2011年第12期1950-1956,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(40872178)

摘　　要：上海地下水位埋深较浅,地铁站建设大多要采取工程降水措施。以上海地铁11号线徐家汇站为例,根据场地工程地质和水文地质条件、地铁站围护结构设计深度和基坑开挖深度,建立地下水渗流数值模型,通过抽水试验反求水文地质参数,结合场地初始条件和边界条件,采用三维有限差分法对基坑降水进行模拟,数值模拟结果与地下水位实际监测数据十分吻合,同时对基坑降水引起的地面沉降进行计算,结果表明基坑周围的地面沉降能够得到有效地控制。The buried depth of groundwater level is fairly shallow in Shanghai,and pit dewatering measures are mostly adopted in construction of metro stations.This study refers to the deep foundation pit dewatering project of Xujiahui Station of Shanghai Metro Line No.11.According to the site conditions of engineering geology and hydrogeology,design depth of enclosure structure and pit excavation of metro station,a numerical model of groundwater seepage is established.Through the inversion of permeability parameters based on the field pumping tests,the three-dimensional finite difference method is used to simulate the pit dewatering considering the initial and boundary conditions.The numerical results are consistent with the actual monitoring data of groundwater level.At the same time,the land subsidence induced by dewatering is calculated.The results indicate that the land subsidence around the pit can be controlled effectively.

关 键 词：上海地铁 深基坑 降水 数值模拟 地面沉降 

分 类 号：TU375.4[建筑科学—结构工程]