摘要
以紧邻珠江的某污水处理厂深基坑为工程背景,开展止水帷幕+管井协同降水施工研究,揭示帷幕对河流侧向补给的阻隔机制及管井降水的渗流调控原理,基于修正裘布依公式完成参数设计,设置无帷幕+有管井、有帷幕+无管井、帷幕+管井协同降水三组平行试验。结果表明:协同降水方案中基坑中心水位在48 h内降至设计深度-6 m,较单一管井方案缩短33.3%;日均抽水量达295 m^(3)/d,较单一管井方案减少42.7%;周边建筑物最大沉降量为4.75 mm,满足规范限值,且较单一管井方案降低61.1%。
Taking a deep foundation pit in a sewage treatment plant adjacent to Pearl River as the engineering background,this paper conducts research on water-stop curtain+tube well collaborative dewatering construction,and reveals the curtain's mechanism for blocking lateral river recharge and the seepage regulation principles of tube well dewatering.Based on the modified Dupuit formula,the parameter design is completed,and three sets of parallel tests are set up:no curtain+tube well,curtain+no tube well,curtain+tube well collaborative dewatering.The results show that the central water level in the foundation pit in the collaborative dewatering scheme is reduced to the design depth of-6 m within 48 h,which is 33.3%shorter than that of the single tube well scheme;the average daily pumping capacity reaches 295 m^(3)/d,which is 42.7%less than that of the single tube well scheme;the maximum settlement of surrounding buildings is 4.75 mm,meeting the specification limit and representing a 61.1%reduction compared with the single tube well scheme.
作者
杨根胜
YANG Gensheng(Shenzhen Nanhua Geotechnical Engineering Co.,Ltd.,Shenzhen 518000,Guangdong,China)
出处
《工程技术研究》
2026年第1期33-35,共3页
Engineering and Technological Research
关键词
深基坑
止水帷幕
管井降水
砂性含水层
deep foundation pit
water-stop curtain
tube well dewatering
sandy aquifer
