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运用地下水渗流理论,以上海地铁10号线南京东路地铁站基坑降水工程为研究对象,采用地下水数值模拟软件GMS对基坑降水三维非稳定渗流场进行数值模拟与计算。根据基坑北端头井的抽水试验资料,反求第⑦承压水主要水文地质参数,以此为依据对基坑降水过程进行数值模拟。计算结果表明,现有的地下连续墙深度及降压井布局能较好地满足基坑降水设计要求和施工安全。
Using groundwater seepage theory, taking the foundation pit dewatering project of Nanjing East Road Metro Station on Shanghai Metro Line 10 as the research object, the numerical simulation and calculation of 3D unsteady seepage field of foundation pit by numerical simulation software GMS are carried out. According to the pumping test data of the northern end pit of the pit, the ⑦ primary hydrogeological parameters of the confined water are reversed, and the numerical simulation of foundation pit dewatering is carried out. The calculation results show that the existing underground continuous wall depth and buck well layout can well meet the requirements of foundation pit dewatering design and construction safety.