本文通过对该车站工程地质和水文地质的分析,结合基坑周边环境条件,论述了降水试验的必要性和可行性,根据现有条件提出了降水试验的目的和试验数据的分析方法和试验对后期基坑降水和开挖的指导性和决定性作用,旨在提高降水试验的实施对基坑降水和基坑开挖的指导性地位,从中将降水试验提高到一定的高度,为基坑开挖施工提供技术依据,并为深大基坑的降水工程提供参考与借鉴。 Based on the analysis of engineering geology and hydrogeology of the station and the surrounding environmental conditions of foundation pit, this paper discusses the necessity and feasibility of precipitation test. According to the existing conditions, the purpose of precipitation test and the analysis method and test data of test data The guiding and decisive role of post-foundation pit dewatering and excavation is to improve the guiding position of precipitation test on the foundation pit dewatering and foundation pit excavation, from which the precipitation test will be raised to a certain height for the foundation pit excavation Provide technical basis for construction and provide reference and reference for the precipitation engineering of deep foundation pit.