针对地处河漫滩地层的南京地铁西延线奥-元区间工程,通过介绍其基坑降水方法,讨论其优劣,总结其成功的经验,提出合理的设计思路和施工工艺。 Aiming at the Austrian-Yuanzhou section of west extension of Nanjing Metro in the floodplain stratum, the paper introduced the method of foundation pit dewatering, discussed its advantages and disadvantages, summed up its successful experience, proposed reasonable design ideas and construction techniques.