杭州轨交6号线钱江世纪城站工程紧邻钱塘江,其下圆砾层承压含水层厚34 m,水头上涌高度大,原设计封闭式止水帷幕实际施工难度大、工期长,封闭质量难以保证。通过借鉴相关工程、现场试验及理论分析后,优化了基坑围护综合设计方案,采用悬挂式帷幕+坑内降水的方法,在紧邻钱塘江地区的大、深基坑施工中应用获得了成功,且社会经济效益显著。 Qianjiang Century City Station project of Hangzhou Rail Transit Line 6 is adjacent to Qiantang River. The confined aquifer of the lower gravel layer has a thickness of 34 m and a large head-up height. The actual design of the closed water curtain is of great difficulty in construction and long construction period. Closed quality is difficult to guarantee. After drawing lessons from relative engineering, field test and theoretical analysis, the comprehensive design scheme of foundation pit enclosure is optimized. The method of hanging curtain + pit precipitation is applied successfully in large and deep foundation pit construction near Qiantang River. And significant social and economic benefits.