【作者】 李卫华； 刘天任； 洪小星； 景旭成； 谭勇；

【Author】 LI Weihua;LIU Tianren;HONG Xiaoxing;JING Xucheng;TAN Yong;Nantong Rail Transit Co.,Ltd.;Department of Geotechnical Engineering,Tongji University;

【机构】 南通城市轨道交通有限公司； 同济大学土木工程学院；

【摘要】 通过进行抽水试验和数值反演,针对南通某地铁车站场地隔水层缺失的水文地质条件,确定了该场地水文地质参数,并为围护结构和降水设计提供参考依据。试验结果表明第③₂层与第③₄层水力联系较为密切,计算分析表明该场地不需要减压降水。通过沉降预测和方案比选,选择35m地下连续墙和38m抽水井的方案,可将基坑周边沉降控制在5～9mm。更多还原

【Abstract】 The problem of dewatering control has always been the focus of construction in foundation pit engineering.In this paper,through the pumping test and numerical inversion in the site of a subway station in Nantong with the lack of aquitard,the hydrogeological parameters of the site were determined,and the reference basis for the enclosure structure and dewatering design was provided.The test results show that the hydraulic connection between ③₂ and ③₄ layers is relatively close;the calculation analysis shows that the site does not need decompression dewatering;through the settlement prediction and the comparison of the scheme,the 35 m underground continuous wall,and the 38 m pumping well are selected.The settlement around the foundation pit is controlled from 5 mm to 9 mm.更多还原