基坑开挖对邻近地铁隧道影响的研究进展  

Research Progress on the Impact of Excavation of Foundation Pits on Adjacent Subway Tunnels

作　　者：王锋 WANG Feng(China Railway 20th Bureau Group Co.Ltd.,Xi′an Shaanxi 710000,China)

机构地区：[1]中铁二十局集团有限公司,陕西西安710000

出　　处：《铁道建筑技术》2025年第2期187-192,共6页Railway Construction Technology

基　　金：中铁二十局集团有限公司科技研发项目(YF1632ZH08B)。

摘　　要：基坑开挖卸荷会导致邻近地铁隧道结构产生不必要变形,严重时影响地铁线路的正常运营。针对邻近隧道基坑卸荷工程,分别从基坑开挖对邻近地铁隧道变形的影响因素、机理以及控制措施等几个方面进行综述,阐明基坑开挖顺序、开挖规模、基坑支护、基坑与隧道的距离以及基坑降水对邻近地铁隧道变形的影响机制,探讨通过前期规划、隧道自身加固、施工措施和加强监测等方面采取措施以减小基坑开挖对邻近地铁隧道的影响。最后,以西安世纪大道管廊项目上跨地铁隧道基坑工程为例,验证了本文影响机理分析的正确性和控制措施的有效性,以期为现场基坑工程设计施工提供参考。Excavation unloading in pit construction can induce undesirable deformations in adjacent subway tunnel structures,posing significant risks to the safe and normal operation of subway lines.Against the foundation pit unloading engineering of adjacent tunnels,this study systematically reviews factors influencing adjacent tunnel deformation caused by pit excavation,explores underlying mechanisms,and proposes control measures.The impact mechanism of the excavation sequence,excavation scale,foundation pit support,the distance between foundation pit and tunnel and foundation pit dewatering on the deformation of adjacent subway tunnels is elucidated,and the measures taken through early planning,tunnel self reinforcement,adaptive construction techniques,and strengthened monitoring are explored to reduce the adverse effects of foundation pit excavation on adjacent subway tunnels.Finally,taking the foundation pit engineering of the overpass subway tunnel in the Xi′an Century Avenue Tunnel Corridor Project as an example,the correctness of the impact mechanism analysis and the effectiveness of the control measures in this paper are verified,in order to provide reference for the design and construction of on-site foundation pit engineering.

关 键 词：基坑开挖 地铁隧道变形 开挖顺序 基坑支护 

分 类 号：TU47[建筑科学—结构工程]