山岭隧道不同台阶法下支护结构力学行为研究

Study on Mechanical Behavior of Support Structure Under Different Step Method in Mountain Tunnel

文章依托小北山1号山岭隧道,基于F3断层破碎带的综合条件,运用数值模拟方法,对比分析上下台阶法不同台阶长度对隧道初支结构、隧道位移等的影响。根据研究结果,选择8~10m台阶长度的范围,可以使隧道的变形和初支受力处在一个中间水平。文章结论可供类似隧道工程参考借鉴,具有一定的社会、经济效益及实际价值。

Based on the comprehensive conditions of the F3 fault fracture zone of xiaobishan no.1 mountain tunnel,this paper USES the numerical simulation method to compare and analyze the influence of different step lengths on the primary branch structure and the displacement of the tunnel.According to the research results,the selection of 8~10m step length range can make the tunnel deformation and initial support force in an intermediate level.The conclusion of this study can be used as a reference for similar tunnel projects and has certain social an d economic benefits and practical value.