软土地区复杂地质环境下基坑工程地下水控制方法研究  

Study on Groundwater Control Methods for Foundation Pit Engineering in Soft Soil Areas Under Complex Geological Environment

作　　者：吴斌 WU Bin(Shanghai Construction No.1(Group)Co.,Ltd.,Shanghai 200120,China)

机构地区：[1]上海建工一建集团有限公司,上海200120

出　　处：《建筑施工》2024年第11期1848-1851,1860,共5页Building Construction

基　　金：上海建工集团股份有限公司重点研发项目(22JCSF-02)。

摘　　要：为了降低软土地区基坑降水对复杂地质及周边环境的影响,以上海市浦东新区张江某邻近地铁隧道且存在古河道的深基坑工程为例,借助Visual Modflow三维渗流数值法,从降水设计、现场实施,到运行和回灌进行全过程分析,提出设置真空疏干深井、应急备用井,并通过水位观测井监控水位的方法,有效管理了因降水而引起的地表沉降与周边地铁线路的位移。本工程基坑降水控制方法对软土地区复杂环境下地下水研究具有普适性,可为其他类似深基坑项目提供数据支撑和理论依据。To reduce the impact of foundation pit dewatering on the complex geology and surrounding environment in soft soil areas,a deep foundation pit project in Zhangjiang,Pudong New Area,Shanghai,which is adjacent to a subway tunnel and encompasses an ancient river channel,is taken as an example.Utilizing the Visual Modflow three-dimensional seepage numerical method,the entire process from dewatering design,field implementation,operation,to recharge is analyzed.The method of setting vacuum draining deep wells,emergency standby wells,and monitoring water levels by water level observation wells is proposed to effectively manage surface subsidence caused by dewatering and the displacement of surrounding subway lines.The dewatering control method for the foundation pit in this project is considered to have universal applicability to the study of groundwater in the complex environments of soft soil areas,providing data support and a theoretical basis for other similar deep foundation pit projects.

关 键 词：软土地区 地铁区间隧道 古河道 基坑工程 地下水控制 真空疏干深井 

分 类 号：TU753[建筑科学—建筑技术科学]