抽水试验在城市轨道交通工程勘察中的运用

Application of water pumping test to investigation of city rail transit construction

地下工程建设中不可避免地遇到地下水的控制问题,正确的水文地质参数是准确预测基坑涌水量进而进行地下水控制的前提。文章以郑州地铁5号线经开第八大街站的现场抽水试验为基础,通过1个抽水试验孔、2个观测孔进行了3个不同水位降深的抽水试验,以更精确地确定含水层的水文地质参数,为深基坑地下水控制设计和施工提供重要的基础数据,对类似建设工程降水系统设计和防治水措施制定具有重要现实意义。

Underground water control is an inevitable problem encountered in the underground engineering operation.Correct determination of hydro geological parameters is the prerequisite of correct prediction of water gushing volume in the foundation pit for water control.Water pumping test was conducted in 1 pumping hole and 2 observation holes at the 8th street station of Zhengzhou’s No.5 subway line at Jingba road to watch drop of the same water table.The hydrogeological parameters of the water-bearing bed is properly determined to provide the key data for underground water control design and operation of the deep foundation pit and for important reference of dewater system of similar engineering construction.