动水条件下高压喷射注浆成桩工艺及基坑渗漏堵塞研究  

Study on High-pressure Jet Grouting Pile Formation Techniques and Seepage Plugging in Foundation Pit under Dynamic Water Conditions

作　　者：陈坚 CHEN Jian(Shanghai Mechanized Construction Group Co.,Ltd.,Shanghai 200072,China)

机构地区：[1]上海市机械施工集团有限公司,上海200072

出　　处：《建筑施工》2024年第5期727-731,共5页Building Construction

基　　金：上海建工集团股份有限公司基金项目(19YJKF-11)。

摘　　要：针对动水条件下地铁车站深基坑开挖过程发生墙体渗漏问题,采用多种措施进行堵渗,但堵塞效果受到水力梯度、地下连续墙渗漏缺陷区域大小、渗透系数等因素影响较大。基于工程实践,采用多孔介质颗粒运移理论研究建立一套完备的基坑注浆堵漏的模拟计算方法,以期为类似工程改善注浆堵漏效果与评估提供借鉴。Considering the wall leakage problem during the excavation of deep foundation pits in subway stations under dynamic water conditions,various measures are used to stop the leakage.However,the effectiveness of these measures is greatly affected by the factors such as the hydraulic gradient,the size of the leakage defect area in the underground continuous wall,and the permeability coefficient.Based on the engineering practice,the theory of porous media particle migration is used to study and establish a comprehensive simulation calculation method for grouting plugging in foundation pit.It can provide a reference for improving the effectiveness and evaluation of grouting plugging in similar projects.

关 键 词：地铁车站 深基坑 承压水 MJS旋喷桩 数值分析 

分 类 号：TU753[建筑科学—建筑技术科学]