地铁分岔隧道施工性态的三维数值模拟与分析  

3D SIMULATION AND ANALYSIS ON CONSTRUCTION BEHAVIOR OF FORKED METRO TUNNEL

作　　者：吴波[1] 刘维宁[1] 高波[2] 索晓明[1] 史玉新[1] 

机构地区：[1]北京交通大学土木建筑工程学院 [2]西南交通大学土木工程学院地下工程系,成都610031

出　　处：《岩石力学与工程学报》2004年第18期3081-3086,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：中铁四局科研基金(2002-03)资助课题。

摘　　要：深圳地铁大—科区间预留2#接口线隧道是一个结构极为复杂的洞群系统工程。由于地质条件差,且周围环境条件限制严格,施工难度和风险极大,因此,对该工程进行了施工优化分析,建立了复杂的三维弹塑性有限元计算模型,并对该工程的施工过程进行了三维动态仿真分析,从理论上探讨了所拟定的施工方案的合理性和可行性,并取得了一些有意义的成果,为该工程的顺利施工提供了依据和指导。工程实践表明,理论分析结果是合理可靠的。Forked line 2# of Da-Ke running tunnel of Shenzhen metro is a complicated multi-tunneling system, with bad geological condition and strict environment restriction around it. The optimized analysis on construction is done and complex 3D FEM model is set up. The ground subsidence and stability of surrounding rocks during construction are analyzed with 3D elasto-plastic FEM. From FEM computation, the maximum ground subsidence is less than 30 mm during excavation, and the failure zones of surrounding rocks and internal forces and deformation of tunnel support are also analyzed. The analysis results were proved by the real engineering that was very successfully built.

关 键 词：隧道工程 分岔隧道 洞群系统  三维数值模拟 施工效应 地铁 

分 类 号：U231.3[交通运输工程—道路与铁道工程]