盾构隧道正交下穿既有隧道的影响性分析  

Analysis on influence of orthogonal tunneling on shield tunnel

作　　者：高东[1] 汪东林[1] 

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230022

出　　处：《河南城建学院学报》2017年第2期28-32,共5页Journal of Henan University of Urban Construction

基　　金：安徽省教育厅教学研究重点项目(2015jyxm252);安徽省高校优秀中青年骨干人才国外访学研修重点项目(gxfx ZD2016128)

摘　　要：基于某地铁开挖区间隧道盾构正交下穿既有隧道工程,用有限元软件MIDAS GTS/NX对隧道盾构过程进行仿真模拟,分析了新隧道盾构下穿施工对地表和既有隧道的影响。结果表明:新盾构隧道下穿既有隧道时,衬砌的变形主要在竖直方向,对在水平方向的变形影响较小;既有隧道衬砌结构出现不均匀沉降,正交位置附近沉降值最大,隧道变形在安全的限度范围内。Based on the tunneling process of the subway excavation tunnel, the shield tunneling process is simulated by the finite element software MIDAS GTS/NX, and the influence of shield tunneling on the surface and existing tunnels was analyzed. The results show that the deformation of the lining is mainly in the Z-axis direction, which has little effect on the deformation in the X-axis and Y-axis directions when the new tunnel is tunneled through the existing tunnel. The existing tunnel lining structure appears uneven settlement, the maximum value appears near the orthogonal position, and the tunnel deformation is within the limits of safety.

关 键 词：隧道盾构 仿真模拟 正交下穿 地表沉降 

分 类 号：U25[交通运输工程—道路与铁道工程]