施工顺序对小净距并行地铁隧道的影响研究  

Research on the Influence of Construction Sequence on Parallel Subway Tunnels with Small Interval

作　　者：唐凯 刘洋 TANG Kai;LIU Yang(Chengdu Architectural Design&Research Institute Co.,Ltd.,Chengdu 610041,Sichuan,China;Chengdu Municipal Engineering Design and Research Institute Co.,Ltd.,Chengdu 610011,Sichuan,China)

机构地区：[1]成都市建筑设计研究院有限公司,四川成都610041 [2]成都市市政工程设计研究院有限公司,四川成都610011

出　　处：《工程技术研究》2023年第5期219-221,共3页Engineering and Technological Research

摘　　要：文章以北京地区某新建地铁隧道及换乘通道工程为背景,研究不同施工顺序对小净距隧道的影响,即通过有限元数值模拟计算,对四个施工方案下的地表沉降、隧道拱顶位移和中间夹土体应力特征进行重点分析研究。结果表明:从控制地表沉降和隧道拱顶沉降的角度出发,方案二先开挖左线隧道,再依次开挖右线隧道、换乘通道及活塞风道的施工顺序相对最优;在选择施工顺序中优选能有效减小隧道中间夹土应力的方案二,对隧道施工更有利;采用先施工小断面隧道后施工大断面隧道的施工顺序更为合理。Based on the background of a new subway tunnel and transfer channel project in Beijing,this paper studies the influence of different construction sequences on tunnels with small interval,that is,through finite element numerical simulation calculation,the surface settlement,tunnel vault displacement and intermediate soil stress characteristics under four construction schemes are analyzed and studied.The results show that from the perspective of controlling surface settlement and tunnel vault settlement,the construction sequence of excavating the left line tunnel first and then excavating the right line tunnel,transfer channel and piston air passage in turn in the second scheme is relatively optimal.In the selection of construction sequence,the second scheme which can effectively reduce the soil stress in the middle of the tunnel is favorable for tunnel construction.It is more reasonable to adopt the construction sequence of constructing small section tunnel first and then large section tunnel.

关 键 词：并行隧道 小净距 施工顺序 地铁隧道 

分 类 号：U231.3[交通运输工程—道路与铁道工程] U455[建筑科学—桥梁与隧道工程]