垂直交叉隧道的计算分析  

Analysis on Perpendicularly crossing tunnels

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：《现代隧道技术》2001年第3期29-33,共5页Modern Tunnelling Technology

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。本文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 to research the ground movement during the construction of tunnel. Based on the simulating of the actual construction situation, the influence on the old tunnel when new tunnel is perpendicularly constructed under the old one has been researched by using 3D elasto-plastic FEM. The research result shows that advance force and stability ratio N are the main factors controlling the deformation of old tunnel.

关 键 词：垂直交叉隧道 质构施工 老隧道变形 计算分析 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]