深圳地铁隧道邻接施工沉降数值模拟研究  

Research on the Numerical Simulation of Subsidence of Existing Tunnel Caused by Adjacent Metro Tunnel Construction in Shenzhen

作　　者：张会刚[1] 姜志玲[2] 章玉伟[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]西南石油大学,成都610500

出　　处：《铁道工程学报》2009年第10期55-58,63,共5页Journal of Railway Engineering Society

摘　　要：研究目的:针对深圳地铁新建隧道邻接既有隧道工程,利用FLAC3D软件进行施工过程模拟,探讨新建地铁区间隧道施工过程中新建隧道周边地层位移、既有隧道施工沉降、地面沉降、新建与既有隧道的安全等问题。研究结论:在本地质条件和特定盾构推力情况下,地面最大沉降12.9 mm,最大隆起值0.7 mm,变形量满足设计要求;既有隧道施工结束并完成相应固结沉降最终沉降值为1.8 mm,地表沉降槽宽度约60 m,沉降曲线相对平坦,满足既有隧道横向差异沉降要求。Research purposes ： The process is simulated for construction of a metro tunnel adjacent to existing tunnel in Shenzhen with FLAC3D software and the discussions are made on the surrounding stratum displacement, the existing tunnel subsidence, ground subsidence, the safety of the new tunnel and the adjacent metro tunnel. Research conclusions ： Under this geological condition and specially pushing force of shield, the maximum of the ground subsidence is 12.9 mm, and the maximum rise value of ground is 0.7 mm. They satisfy the design requirements. After the completion of the existing tunnel and taking some measures, the corresponding consolidated subsidence value is 1.8 mm. The width of subsidence slot under the tunnel floor is 60 m. The subsidence curve is relatively flat, which satisfies the lateral differential subsidence demand of the existing tunnel.

关 键 词：邻接施工 地铁隧道 地面沉降 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]