摘要
Abstract
In order to improve the construction quality of highway tunnel with weak surrounding rock,indoor model tests were designed based on the lining structure similarity criterion,and the relationship between surrounding rock pressure and lateral pressure coefficient and the dis-tance from tunnel roof was systematically analyzed.The results show that when the coefficient of lateral pressure is 0.5,the pressure return of the surrounding rock at the bottom of the arch and invert is the largest,and the pressure relaxation is the most significant.When the lateral pressure coefficient is 1.0,the pressure recovery of surrounding rock is more uniform and the pressure relaxation is consistent in all parts of the tunnel.When the lateral pressure coefficient is 1.5,the surrounding rock pressure at the arch waist is the largest and the pressure relaxation is the most significant.With the increase of the side pressure coefficient,the increase of the side pressure coefficient of the arch waist is the most significant.Therefore,the mechanical characteristics of highway tunnel with soft surrounding rock can be optimized by adjusting the side pres-sure coefficient and distance from tunnel roof.关键词
公路隧道/软弱围岩/衬砌结构/室内模型/力学特性Key words
Highway tunnel/Weak surrounding rock/Lining structure/Interior model/Mechanical property分类
交通工程
