明挖地铁车站降压井设计与施工

Design and Construction of Water-lowering Well at Open-and-cover Subway Station

本文结合明挖地铁车站工程实例,介绍了承压水对深基坑工程的影响,系统阐述了南京地铁中胜站降压井的设计过程,从基坑降深、基坑降水影响半径、基坑总出水量、单井出水量等参数入手,通过对降压井设计的合理化验证,确定了降水设计方案。另外本文对降压井结构以及施工技术要点都进行了详细的描述,最后从现场监测情况分析了降水设计选取参数的合理性、单井出水量公式的验证。

This article combined the engineering example of open-and-cover subway station,introduced the influences of confined water to the deep hole excavated for building foundation project,expounded the design process of the step-down wells in the Nanjing zhongsheng subway station.From the parameters foundation pit excavation depth、 the influence radius of foundation pit precipitation、 total water discharge、 Single well water discharge and so on,through the water-lowering well design rationalization confirmation,has determined the precipitation design scheme.Moreover this article to water-lowering well structure and construction technique key has carried on the detailed description.Finally,analyzed the rationality of the design parameters of precipitation through the monitoring,the single well water discharge formula confirmation.