第三系砂泥岩铁路隧道施工方法对比分析

Comparative Analysis of Construction Methods of Railway Tunnel Under Tertiary Sand Shale Condition

以牡绥线双丰隧道为背景,采用二维弹塑性有限元分析方法,模拟3种不同的隧道开挖和支护过程,计算围岩和衬砌内力及支护的强度安全系数,研究不同的开挖方法对其结构稳定性和安全系数的影响,选择最优施工方法,为类似的隧道设计与施工提供参考.

With the background of Shuangfeng tunnel of Mu Sui line , by using the 2-D FEM of elastic plasticity , simulations of three kinds of tunnel excavation are carried out , and the internal force and safety coefficient of the lining is calculated to inspect structure security .Then the thesis discusses the effect of different kinds of tunnel excavation on lining safety coefficient and structure stability , which helps to choose the best construction method and offers guidance and reference for the design and construction of similar railway tunnel .