湖南大学学报（自然科学版）2017，Vol.44Issue(9)：151-157,173,8.DOI:10.16339/j.cnki.hdxbzkb.2017.09.019
强度折减最短路径在浅埋隧道极限分析的存在性研究
Research on the Existence of the Shortest Path of Strength Reduction in the Limit Analysis of Shallow Buried Tunnel
摘要
Abstract
The strength reduction theory of the shortest path was used in the analysis of finite element strength reduction and limit equilibrium strength reduction,the cohesion and internal friction angle were assumed to be reduced by different reduction factor,and the reasonable reduction ratio of cohesion to internal friction angle was discussed in the case of double parameter strength reduction.Considering the influence of the buried depth of the tunnel and tunnel span,the existence of strength reduction of the shortest path in the limit analysis of shallow buried tunnel was proved.The results show that,in the shortest path of the strength reduction of shallow buried tunnel,with the increase of cohesion and internal friction angle reduction ratio,the reduction factor of cohesion increases gradually,the reduction factor of internal friction angle decreases gradually,the reduction path length decreases first and then increases,the reduction ratio and path length approximation follow a parabolic distribution,which proves the existence of the shortest path.In the shortest path of the strength reduction,the reduction range of the cohesion is greater than the internal friction angle,and with the increase of buried depth,the reduction range is gradually approaching.关键词
强度折减/最短路径/有限元法/极限平衡法/合理折减比例Key words
strength reduction/shortest path/finite element method/limit equilibrium method/reasonable reduction ratio分类
交通工程引用本文复制引用
王薇,邹江海,张学民,张恒文..强度折减最短路径在浅埋隧道极限分析的存在性研究[J].湖南大学学报（自然科学版）,2017,44(9):151-157,173,8.基金项目
国家自然科学基金资助项目(51378505),National Natural Science Foundation of China(51378505) （51378505）
