悬挂止水帷幕基坑对角分区现场降水试验研究  

Experimental Study on Onsite Dewatering of Diagonal Zoning in Foundation Pit with Suspended Waterproof Curtain

作　　者：俞水情 YU Shuiqing(Shanghai Construction No.4(Group)Co.,Ltd.,Shanghai 201103,China)

机构地区：[1]上海建工四建集团有限公司,上海201103

出　　处：《建筑施工》2023年第10期1959-1962,共4页Building Construction

摘　　要：生产性抽水试验是基坑开挖条件验收的重要内容,悬挂止水帷幕基坑内外水力联系充沛,降水难度更高。针对上海某深大基坑对角分区开展现场降水试验,验证了止水帷幕和降水系统的工作效能。试验结果表明:基坑内外水位降深比为0.4~0.6,坑边采用自然回灌方式对坑内外水位影响有限。另外,设置远端观测井给出基坑降水对周边的承压水位影响,相关试验结果对类似工程具有参考意义。The productive pumping test is an important part of the acceptance of excavation conditions for foundation pits.The suspended waterproof curtain has abundant hydraulic connections inside and outside the foundation pit,and the dewatering difficulty is higher.An onsite dewatering test is conducted on a deep and large foundation pit in Shanghai to verify the effectiveness of the waterproof curtain and dewatering system.The test results show that the water level drop ratio inside and outside the foundation pit is 0.4-0.6,and the use of natural recharge at the pit edge has limited impact on the water level inside and outside the pit.In addition,the remote observation wells are set up to provide information on the impact of foundation pit dewatering on the surrounding confined water level.The relevant test results have reference significance for similar projects.

关 键 词：悬挂止水帷幕 基坑降水 流量 回灌 

分 类 号：TU753[建筑科学—建筑技术科学]