上海超深基坑地下水综合治理关键技术与工程实践OA

Taking the foundation pit of Yunling West Shaft of Section SS1.2 of the Deep Drainage Storage Pipeline System Project(Pilot Section)in the Suzhou Creek Reach of Shanghai as the research carrier,aiming at the technical challenges of confined water inrush risk and surrounding environmental deformation control during ultra-deep foundation pit excavation,systematic special hydrogeological tests were carried out to accurately characterize the hydrogeological parameters of each confined aquifer affecting foundation pit safety,and a comprehensive evaluation of environmental hydrogeology was completed.Based on the results of on-site confined water trial pumping tests,a stratified decompression dewatering scheme was optimized and designed,and a supporting intelligent monitoring and dynamic management and control system was constructed,strictly implementing the governance principle of"stratified dewatering,demand-based dewatering and dewatering minimization".Engineering practice shows that this comprehensive control technology has successfully controlled groundwater within a safe range,effectively avoided the risks of foundation pit inrush and surrounding environmental deformation,and achieved the expected control goals.It provides a reliable technical paradigm and engineering reference for groundwater control of ultra-deep foundation pits in Shanghai and areas with similar geological conditions.