基于非线性破坏准则的浅埋偏压隧道稳定性分析  

Stability Analysis of Shallow Bias Tunnels Based on Nonlinear Failure Criterion

作　　者：张佳华[1] 杨小礼[1] 张标[1] 许敬叔 杨子汉[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《华南理工大学学报（自然科学版）》2014年第8期97-103,121,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51378510;51178468);湖南省研究生科研创新项目(CX2013B077)

摘　　要：根据虚功率原理,从能量的角度出发,对浅埋偏压隧道的稳定性系数和支护力进行求解,并且对计算结果进行对比与分析.结果表明:在线性破坏准则下,稳定性系数的计算结果与已有的研究成果基本一致,最大误差小于10%,验证了文中计算方法的正确性;在非线性破坏准则下,岩土材料的非线性破坏准则、隧道的埋深与地面坡角、地表荷载以及孔隙水等不利因素对支护力有较大的影响.文中还给出了不同参数值所对应的破坏面的位置,为浅埋偏压隧道的支护设计提供了理论依据.In this paper,the stability coefficient and the supporting force of shallow bias tunnels are calculated based on the principle of virtual power from the viewpoint of energy,and the calculated results are compared. The results show that,based on the linear failure criterion,the calculated results of the stability coefficient are consistent with the existing results with a maximum error of less than 10%,which demonstrates the validity of the calculation method; and based on the nonlinear failure criterion,the supporting force is greatly influenced by some negative factors such as the nonlinear failure criterion of soil materials,the burial depth and the ground slope angle of tunnels,the ground load and the pore water. Besides,the failure surface positions corresponding to different parameter values are put forward,which provides a theoretical basis for the supporting design of shallow bias tunnels.

关 键 词：非线性破坏准则 浅埋偏压隧道 上限定理 稳定性系数 支护力 地面坡角 破坏模式 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]