基坑回填及后续地基处理对相邻地道结构和道路的影响  

Influence of Foundation Pit Backfill and Subsequent Treatment on Adjacent Tunnel Structure and Road

作　　者：李佳[1] LI Jia(School of Architecture Engineering,Sanmenxia Polytechnic,Sanmenxia 472000,Henan,China)

机构地区：[1]三门峡职业技术学院建筑工程学院,河南三门峡472000

出　　处：《筑路机械与施工机械化》2018年第11期112-118,共7页Road Machinery & Construction Mechanization

基　　金：河南省科技发展计划项目(122102310449);河南省高等学校项目(教高[2015]33号)

摘　　要：结合深港西部通道侧接线工程穿越道路的下沉式地道基坑回填及周边地基处理施工方案,通过选取典型基坑断面,采用有限元数值计算方法,分析上覆道面和地道结构在基坑回填及道路填筑过程中产生的沉降,为基坑回填施工方案的选取提供依据;分析地道结构北侧采用堆载预压、强夯2种地基处理方法施工对地道结构和道路的影响,确保地道结构和市政道路免受破坏;针对分析结果提出基坑回填、堆载预压与强夯施工建议,研究结果对于指导工程设计与施工具有重要意义。Combined with the the construction scheme of subsidence tunnel foundation pit backfill and the surrounding foundation treatment for the side connection project of the road-crossing Shenzhen-Hong Kong western corridor,the finite element numerical calculation method was used to analyze the settlement of the overlying pavement and the tunnel structure with typical section of the foundation pit selected.The settlement generated during the backfilling of the foundation pit and road filling process provided instruction for the selection of the foundation pit backfill construction plan.Then,the impact of two foundation treatment methods named the preloading method and the dynamic compaction method,on the tunnel structure and the road in the north side of the tunnel structure was analyzed so that the tunnel structure and the municipal road were protected from damage.The research results are of great significance in guiding engineering design and construction and the methods of foundation pit backfill,preloading and dynamic construction are recommended.

关 键 词：道路工程 基坑 地道结构 回填 

分 类 号：U416.1[交通运输工程—道路与铁道工程]