深圳市龙岗区中心医院门急诊综合楼群孔抽水试验工程实例

The Engineering Example of Pumping Test of Group Holes in the Clinic and Emergency Diagnosis Synthesis Building of Longgang District Center Hospital in Shenzhen

龙岗区中心医院门急诊综合楼工程场地处于覆盖型岩溶发育地区,工程地质及水文地质条件非常复杂。通过群孔抽水试验及成果分析,计算渗透系数、影响半径及估算基坑涌水量,认为场地第四系砂层孔隙水与岩溶裂隙水及河水关系密切,建两层地下室帷幕止水、井点降水费用高且施工难度大,极易造成周边地面塌陷,危险性大。建议改建为一层地下室,获得较好的经济效果。

The clinic and emergency diagnosis synthesis building of LongGang District center hospital is in coverage Karst area where engineering geology and hydrology condition is extremely complex. Through Analysis the data of pumping test of group holes, calculates the permeability coefficient and radius of influence, estimates the gushing water of foundation pit,it indicates that the relation between pore water in quaternary sand deposit of space and Karst crevice - water is close. Pumping water form well point is expansive and difficult if constructs two layers basement using sealing curtain and it is also easy to cause collapse of ground. The draft is very danger. So the suggestion of constructs one layer basement is accepted and obtains good economic effect. It can be referenced by the next similar project.