高富水岩溶地层地铁隧道盾构施工研究  

Metro Tunnel Shield Construction in Highly Water-rich Karst Strata

作　　者：赵何明 ZHAO Heming(China Railway Construction Bridge Engineering Bureau Group Second Engineering Co.,Ltd.,518083,Shenzhen,China)

机构地区：[1]中铁建大桥工程局集团第二工程有限公司,深圳518083

出　　处：《城市轨道交通研究》2025年第3期214-220,共7页Urban Mass Transit

摘　　要：[目的]在盾构机穿越浅埋地层中的高富水岩溶发育区域时,由于溶洞的存在,地面沉降控制面临极大挑战,对邻近建构筑物的安全构成潜在风险。因此有必要对高富水岩溶地层地铁隧道盾构施工进行研究。[方法]针对深圳地铁16号线工程,分析了盾构机穿越高富水岩溶地层所面临的风险,旨在解决溶洞对隧道及地面沉降的影响问题。采用FLAC3D软件进行数值模拟分析,构建了高富水岩溶地层中盾构机掘进的模型,探究了溶洞与隧道的相对位置关系及溶洞的发育规模对隧道及地面沉降的影响,明确了盾构机掘进过程中需重点关注的溶洞类型及其范围。最终,结合工程类比法与实际工程情况,提出了溶洞注浆的处理措施。[结果及结论]工程实践验证,溶洞注浆措施能够有效应对盾构机穿越高富水岩溶地层时产生的隧道及地面沉降问题。[Objective]When a shield tunneling machine passes through highly water-rich karst development regions in shallow strata,the presence of karst cavities poses significant challenges to land subsidence control,creating potential risks to the safety of adjacent structures.It is therefore essential to conduct research on metro tunnel shield construction in highly water-rich karst strata.[Method]Focusing on Shenzhen Metro Line 16 project,the risks associated with shield tunneling through highly water-rich karst strata are analyzed to address the impacts of karst cavities on tunnels and land subsidence.Numerical simulation analysis is performed using FLAC3D software,a shield machine tunneling model in this type of strata is constructed,and the relative positional relationship between karst cavities and tunnels as well as the influence of cavity developing scale on tunnels and land subsidence are explored.Key types and ranges of karst cavities requiring special attention during shield machine tunneling are identified.Finally,based on engineering analogy methods and actual project conditions,grouting measures for cavity treatment are proposed.[Result&Conclusion]Engineering practice verifies that karst cavity grouting measures effectively mitigate tunnel settlement and land subsidence issues caused by shield machine tunneling in highly water-rich karst strata.

关 键 词：地铁隧道 岩溶地层 隧道沉降 盾构掘进 注浆 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]