2023·1·BuildingConstruction18富水软土地区超深基坑CSM施工技术研究魏斌1刘长斌1康建国1刘畅2杨宇航21.中交一公局集团第八工程有限公司天津300190;2.天津大学建筑工程学院天津300072摘要:天津地铁11号线吴家窑站周边环境复杂,作为换乘站邻近既有3号线吴家窑站,围护结构与3号线既有隧道净距仅为19.8m,因此既有隧道为重点保护对象。为避免对既有线产生变形影响,在邻近既有线位置采用双轮铣深层搅拌墙进行加固,成功施工53m深双轮铣搅拌墙,代替传统的三轴搅拌加固,效率高、环境污染小、成本低、安全系数高。总结的施工经验可为以后富水地区基坑工程中的CSM施工提供参考。关键词:双轮铣搅拌墙:既有隧道;槽壁加固;CSM中图分类号:TU753文献标志码:A文章编号:1004-1001(2023)01-0018-04DOI:10.14144/j.cnki.jzsg.2023.01.005StudyonCSMConstructionTechnologyofSuperDeepFoundationPitinWaterRichSoftSoilAreaWEIBin1LIUChangbin1KANGJianguo1LIUChang2YANGYuhang21.The8thEngineeringCo.,Ltd.ofCCCCFirstHighwayEngineeringGroupCo.,Ltd.,Tianjin300190,China;2.SchoolofCivilEngineering,TianjinUniversity,Tianjin300072,ChinaAbstract:ThesurroundingenvironmentofWujiayaoStationofTianjinMetroLine11iscomplex.Asatransferstation,itisadjacenttotheexistingWujiayaoStationofLine3.ThecleardistancebetweenthesupportstructureandtheexistingtunnelofLine3isonly19.8m,thustheexistingtunnelisthekeyprotectionobject.Inordertoavoidtheinfluenceofdeformationontheexistingline,doublewheelmillingdeepmixingwallisusedforreinforcementatthepositionadjacenttotheexistingline.The53mdeepdoublewheelmillingmixingwallissuccessfullyconstructedtoreplacethetraditionalthree-axismixingforreinforcement,withhighefficiency,lowenvironmentalpollution,lowcostandhighsafetyfactor.ThesummarizedconstructionexperiencecanprovidereferenceforthefutureCSMconstructioninthefoundationpitprojectintherichwaterarea.Keywords:doublewheelmillingmixingwall;existingtunnel;groovewallreinforcement;CSM果以及对周边环境的影响,分析了CSM施工技术的成本效益及社会效益,从而为其他类似工程合理运用超深加固工艺提供指导及参考。1工程概况1.1工程场地位置概况本工程位于天津市吴家窑大街与气象台路交口的东侧,车站西侧为八里...