摘要
在线性破坏准则下,采用极限分析上限法对浅埋隧道的围岩压力和稳定系数进行理论推导,并且采用序列二次迭代算法进行优化求解。研究表明:对于浅埋隧道,埋深较大的地段其支护反力会较大,在施工过程中应注意和加强支护,但由于围岩的自稳能力也较强,故隧道的稳定性会较好。
Based on the linear failure criterion,theoretical formulas of pressure on surrounding rock and stability coefficient of shallow tunnel were deduced using upper bound theorem of limit analysis,and optimal solutions were obtained through sequential quadratic programming.The results show that,the deeper the shallow tunnel is,the bigger the support pressure,so the supporting system during construction of tunnel should be paid attention to and carefully strengthened.However,with the increase of buried depth of shallow tunnel,the self-supporting ability of surrounding rock becomes stronger,which means the stability of tunnel is better.
出处
《公路工程》
北大核心
2013年第4期262-264,共3页
Highway Engineering
关键词
线性破坏准则
极限分析上限法
埋深比
围岩压力
稳定系数
linear failure criterion
upper bound theorem of limit analysis
ratio of burial depth
pressure of surrounding rock
stability coefficient
