明挖地铁车站基坑溶洞预处理技术  

Karst Cave Pretreatment Technology in Foundation Pit of Open-cut Metro Station

作　　者：朱斌 徐壮 罗小刚 韩莉 姬凤玲[2] 彭远胜 ZHU Bin;XU Zhuang;LUO Xiaogang;HAN Li;JI Fengling;PENG Yuansheng(Shenzhen Metro Construction Group Co.,Ltd.Shenzhen 518026,China;College of Civil and Transportation Engineering,Shenzhen University Shenzhen 518060,China)

机构地区：[1]深圳地铁建设集团有限公司,深圳518026 [2]深圳大学土木与交通工程学院,深圳518060

出　　处：《广东土木与建筑》2022年第8期9-12,共4页Guangdong Architecture Civil Engineering

基　　金：国家自然科学基金重点项目(1938008);深圳地铁科研咨询项目(STJS-DT416-KY001/2020)

摘　　要：强发育岩溶对地铁车站、周边环境及人民生命财产造成了极大的威胁,因此岩溶的提前预处理是地铁车站基坑施工前必不可少的环节之一。以穿越强发育岩溶地段的深圳地铁16号线某车站基坑为研究对象,基于溶洞竖向分布特征,综合考虑基坑开挖过程中的基坑突涌风险及岩溶塌陷风险、地铁车站运营过程中的岩溶塌陷风险,确定出基坑开挖范围内及结构底板下0~10 m深度内的溶洞需要预处理。预处理采用溶洞充填注浆加固技术。最终的检测结果表明该处理技术合理、可行,为今后类似强岩溶发育地区地铁车站溶洞风险治理提供了技术参考。The existence of strongly developed karst is a great threat to the subway station and the surrounding environment as well as people’s life and property.Therefore,the pretreatment of karst is one of the essential steps before the construction of subway station.In this study,a station of Shenzhen Metro line 16 which goes through the strongly developed karst area was taken as the research object.Based on the vertical distribution characteristics of karst cave,it was determined that the karst cave within the excavation scope of foundation pit and within the depth of 0~10 m under the structure floor need pretreatment after considering the risks of foundation pit inrush and karst collapse in the process of foundation pit excavation and karst collapse during the process of subway station operation.And filling grouting reinforcement technology for karst cave was used in the pretreatment.The final test results show that the treatment technology is reasonable and feasible,which provides a technical reference for karst cave risk management in subway stations in similar areas with strong karst development in the future.

关 键 词：地铁车站 溶洞 基坑突涌 塌陷 预处理 

分 类 号：TU753.1[建筑科学—建筑技术科学]