摘要
Abstract
In order to reduce the influence of high slope excavation on the deformation and stress response of the existing tunnel,MIDIS finite element software was used to simulate and analyze the deformation,axial force,bending moment and principal stress of the tunnel lining struc-ture during slope excavation.The analysis results show that with the increase of excavation depth,the peak value of uplift and distance curve from tunnel center line approach the right side continuously.The uplift of tunnel lining structure increases continuously,and the maximum up-lift is 3.6 mm.The axial force and bending moment of tunnel lining structure increase continuously,the first principal stress of tunnel lining structure increases continuously,and the third principal stress decreases continuously.The x-axial force and bending moment of tunnel lining structure are higher than the Y-axial force and bending moment.The results show that slope excavation and unloading have a significant effect on the deformation and mechanical response of tunnel lining structure,so the tunnel lining should be strengthened during excavation.关键词
边坡开挖/隧洞工程/MIDIS有限元/变形特性/力学响应Key words
Slope excavation/Tunnel engineering/MIDIS finite element/Deformation characteristics/Mechanical response分类
交通工程
