【摘要】 为了更深入地了解施工过程联拱隧道围岩—支护结构体系的力学响应 ,并优化施工工序 ,以便在实际施工中根据具体情况和经济、技术水平调整施工步骤 ,对联拱隧道支护设计进行了三维模型分析。用FLAC3D对双联拱隧道网喷混凝土初期支护设计 ,进行了力学响应动态分析模拟 ,分析了岩体支护前后围岩的变形及应力状态 ,对隧道围岩的稳定性和初期支护结构的安全性做出综合评判 ,得出了一些非常有益的结论 ,用以指导襄十高速公路双联拱隧道的施工 ,取得了较好的经济效益。更多还原

【Abstract】 In order to acquire mechanics response between rock wall and support frame system in optimum-design to adjust working stage in time it was necessary to simulate 3D model of tunnel support design. The FLAC 3D model and different support parameters were used to simulate and analysis the stress and displacement in the wall rock mass during primary support of the double-arch tunnel in this paper, the stress and displacement law of the supporting structure was achieved as well. Some beneficial results were gained and offered the optimized working procedure to the double-arch tunnel to direct working, great economic benefit was attained as well.更多还原