基于 ANSYS 有限元软件的隧道开挖支护数值模拟分析

摘要

In order to explore the stress of structure in the process of tunnel excavation,this paper,based on Fenshui tunnel project in Chongqing,simulates the real excavation process of highway tunnel by using fi-nite element analysis software.It mainly analyzes changes of stress,displacement and bending moment during the tunnel excavation process in order to judge the stability of surrounding rock in the different stages of con-struction .The calculation results show that the stress concentration mainly appear in the side walls,vaults and the bottom of arches,therefore the support in these key areas should be properly strengthened.%为了探究隧道开挖过程中结构的受力情况，文章依托位于重庆的分水隧道工程，利用有限元软件模拟公路隧道真实开挖过程，通过分析隧道围岩开挖过程中结构的应力、位移和弯矩的变化，实时判断施工各阶段围岩的稳定性。计算结果表明，在隧道开挖过程中，应力集中主要出现在边墙、拱顶和拱底，因此应适当加强这些重点部位的支护。