富水圆砾层地铁车站深基坑周边土体防渗加固技术  

Technology of Soil Seepage Prevention and Reinforcement around Metro Station Deep Foundation Pit in Water-rich Round Gra-vel Stratum

作　　者：欧孝夺[1,2,3] 李胜 钟有信 胡盛斌 江杰 OU Xiaoduo;LI Sheng;ZHONG Youxin;HU Shengbin;JIANG Jie(College of Civil Engineering and Architecture,Guangxi University,530004,Nanning,China;不详)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]工程防灾与结构安全重点实验室,南宁530004 [3]广西金属尾矿安全防控工程技术研究中心,南京530004 [4]南宁轨道交通集团有限责任公司,南宁530029 [5]华南理工大学土木与交通学院,510641

出　　处：《城市轨道交通研究》2020年第9期165-169,共5页Urban Mass Transit

基　　金：国家自然科学基金地区科学基金项目(51768006,51568006);广西科技计划项目(桂科AB17195035)。

摘　　要：针对富水圆砾地质条件下,土体注浆加固效果较差、造价较高的问题,采用声纳渗流检测技术,通过测量地下水流速、流向、流量和渗透系数等数据,利用三维可视化图像确定渗漏通道指导施工,采取有针对性的防渗加固土体措施。同时结合土层特性,调整袖阀管注浆成分和灌浆长度,实现精准加固。Targeting at problems of poor grouting reinforcement effect and high construction cost in water-rich round gravel stratum conditions,the sonar seepage detection technology is adopted.By measuring the groundwater flow velocity,direction,volume and the coefficient of permeability,3 D visualization image is used to guide the construction by determining the leakage channel,and targeted anti-seepage soil reinforcement measures are adopted.At the same time,combined with the characteristics of soil layer,the sleeve valve pipe grouting composition and grouting length are adjusted to achieve accurate reinforcement.

关 键 词：地铁车站 深基坑 圆砾层 土体加固 声纳渗流检测 

分 类 号：TU472[建筑科学—结构工程] U231.4[建筑科学—土工工程]