盾构施工中垂直交叉隧道变形的三维有限元分析  

3D FEM deformation analysis with the new tunnel perpendicularly crossing under the old one

作　　者：李强[1] 曾德顺[1] 

机构地区：[1]同济大学特种土木工程技术研究所,上海200092

出　　处：《岩土力学》2001年第3期334-338,共5页Rock and Soil Mechanics

摘　　要：采用三维有限元模拟盾构推进的过程，是研究盾构施工中土层移动的最有效的手段。采用三维弹塑性有限元，在真实模拟施工情况的基础上，研究了新隧道从老隧道下面垂直穿过时，对老隧道的变形影响情况。研究表明，推进力和稳定比N是影响老隧道变形的主要因素。Using the 3D elasto-plastic FEM to simulate the shield advance is the most effective method for research of the ground movement during the construction of the tunnel. Based on simulating the actual construction, this paper researched the influence on the old tunnel of the new tunnel which perpendicularly passes below the old tunnel by using 3D elasto-plastic FEM. The research shows that advance force and stability ratio N are the main factors for controlling the deformation of the old tunnel.

关 键 词：三维有限元 稳定比 盾构施工 垂直交叉隧道 变形 推进力 土层移动 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]