岩溶发育区地铁车站基坑突涌影响因素与处理技术研究  

Influencing Factors and Treatment Technology for Foundation Excavation Inrush of Subway Station in Karst Development Area

作　　者：孟栋 徐壮 罗小刚 韩莉 姬凤玲[2,3] 彭远胜 MENG Dong;XU Zhuang;LUO Xiaogang;HAN Li;JI Fengling;PENG Yuansheng(Shenzhen Metro Group Co.,Ltd.,Shenzhen,Guangdong 518040,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China;Shenzhen Key Laboratory of Green,Efficient and Intelligent Construction of Underground Metro Station,Shenzhen,Guangdong 518060,China)

机构地区：[1]深圳市地铁集团有限公司,广东深圳518040 [2]深圳大学土木与交通工程学院,广东深圳518060 [3]深圳市地铁地下车站绿色高效智能建造重点实验室,广东深圳518060

出　　处：《施工技术（中英文）》2022年第21期133-138,共6页Construction Technology

基　　金：国家自然科学基金重点项目(51938008);深圳地铁科研咨询项目(STJS-DT416-KY001/2020)。

摘　　要：依托深圳地铁16号线车站基坑工程对基坑突涌风险进行分析。研究结果表明,基坑突涌影响因素包括岩溶总体发育程度、溶洞分布特征及岩溶涌水量、基坑底板以下溶蚀裂隙及串珠状溶洞发育特征等。进行岩溶预处理时,应按照岩溶塌陷、基坑突涌确定的最不利条件选择最终的处理范围。突涌预处理技术处理对象除溶洞外,还应包括基坑底部溶蚀裂隙。根据工程实际情况确定的岩溶区基坑突涌应急处理技术包括突涌点反压快速有效止水、基坑外部设置截水帷幕截断岩溶水水平渗流路径、基坑内部设置封堵措施封堵岩溶水垂向渗流路径。Based on the foundation excavation engineering of Shenzhen Subway Line 16, the risk of foundation excavation inrush is analyzed. The research results show that the factors influencing the risk of foundation excavation inrush mainly include the overall development degree of karst, the distribution characteristics of karst caves and karst water inflow, the development characteristics of karst fissures and beaded karst caves under the bottom of the foundation excavation. During karst pretreatment, the final treatment range should be determined according to the most unfavorable conditions of karst collapse and foundation excavation inrush. The objects of the pretreatment technology of foundation excavation inrush in karst area should include dissolution fissures in the bottom of foundation excavation besides karst cave. The technical schemes of foundation excavation inrush emergency treatment in karst area mainly include quick and water stop by back pressure at the inrush point, and water interception curtains which are set outside the foundation excavation to cut off the level of karst water, as well as the seepage path and the inside of the foundation excavation equipped with plugging measures to block the vertical seepage path of karst water.

关 键 词：基坑 岩溶 突涌 溶蚀裂隙 应急处理 

分 类 号：U231[交通运输工程—道路与铁道工程]