摘要
考虑四川桃巴高速公路南江3号隧道不同施工方法的围岩和隧道支护结构的力学问题,基于Ansys数值软件建立三维模型并动态模拟全断面法和台阶法的开挖过程,通过地表沉降、拱顶下沉、围岩应力、初期支护应力和围岩强度发挥系数等参数的对比分析,得出全断面法为较优方案,可供隧道施工参考.
By consideration of the mechanic problem of the surrounding rock and the tunnel support struc ture under different construction methods in the Nanjiang No. 3 tunnel engineering of TaoBa highway in Si chuan province, the dynamic excavating procedure of the whole section excavation method and the benching tunneling construction method have been numerically simulated by the Ansys finite element method （FEM）. By comparing the ground settlement, crown settlement, surrounding rock stress, initial support stress and S. M. F. , the scheme of the whole section excavation method is much better than that of the benching tunneling construction method, which can provide some theoretical reference for tunnel construc tion.
出处
《兰州交通大学学报》
CAS
2013年第1期41-43,48,共4页
Journal of Lanzhou Jiaotong University
关键词
公路隧道
有限元模拟
全断面法
台阶法
highway tunnel
finite element simulation
whole section method
benching tunneling method
