粉细砂含水地层止水帷幕失效对周边环境的影响  

Influence of Water Stop Curtain Failure on Surrounding Environment in Silt-fine Sand Water-bearing Layer

作　　者：杜舜泽 DU Shunze(China Railway First Group Co.,Ltd.,Xi'an 710054,Shaanxi,China)

机构地区：[1]中铁一局集团有限公司,陕西西安710054

出　　处：《建筑施工》2023年第4期777-780,共4页Building Construction

摘　　要：为了解粉细砂含水地层止水帷幕失效对周边环境的影响规律,进一步确定降水方法,选择平潭某段地下管廊作为研究区段,考虑基坑止水帷幕发生局部失效渗漏的不利情况,采用PLAXIS 3D岩土有限元程序建立三维数值模型,模拟该区段综合管廊明挖基坑降水,对基坑周边环境在发生管涌的条件下,发生的止水帷幕局部不同失效长度及对基坑的影响程度进行分析。得出的结论可为基坑设计与施工帷幕失效影响评估及修复处置提供参考。To understand the effect of the failure of water stop curtain on the surrounding environment of the silt-fine sand water-bearing layer and further determine the precipitation method,the underground utility tunnel of a section of Pingtan is selected as the research section,and the adverse situation of the local failure and leakage of the water stop curtain of the foundation pit is considered,the 3D numerical model is established using the PLAXIS 3D geotechnical finite element software to simulate the dewatering of the open-cut foundation pit of the utility tunnel in this section.The local different failure lengths of the water-stop curtain and the impact on the foundation pit under the condition of piping in the surrounding environment of the foundation pit are analyzed.The conclusions obtained can provide reference for the evaluation of the effect of curtain failure on the design and construction of foundation pit and the repair and disposal.

关 键 词：粉细砂地层 止水帷幕 失效 有限元分析 

分 类 号：TU46[建筑科学—结构工程]