岩层倾角对层状岩体隧道稳定性影响分析

摘要

在山岭隧道的修建过程中通常会穿越倾斜层状岩体,因为具有倾斜产状的层状岩体在倾斜面切向与法向的力学特性差异很大,可见倾斜层状岩体具有显著的各向异性.为了研究层状岩体开挖过程中隧道的力学特性,对这类岩体中隧道开挖后倾角对层状岩体隧道稳定性影响进行了分析.采用FLAC3d有限差分软件对隧道施工过程进行了数值模拟,分析了岩层倾角对偏压作用的影响程度与规律.%The layered rocks of tilt occurrence are always passed when the tunnels are constructed in the mountains.The layered rocks of tilt occurrence cannot be regarded as isotropic rocks because of the difference of mechanics between the tangential surface and vertical surface.In order to determine the properties of mechanics in the process of tunnel construction in the layered rock,the stability of surrounding rock is analyzed based on the influence of the rock Inclination.The finite difference software FLAC3d in used to simulate the process of tunnel construction in the layered rock-tunnel,in order to obtain the influence law of the unsymmetrical pressure.