基于非线性破坏准则超前支护桩加固高切坡的静动稳定分析  

STATIC-DYNAMIC STABILITY OF PRE-PILED FOR HIGH CUTTING SLOP WITH NONLINEAR FAILURE CRITERION

作　　者：何思明[1,2] 张晓曦[3] 欧阳朝军[1,2] 

机构地区：[1]中国科学院山地灾害与地表过程重点实验室,四川成都610041 [2]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [3]西南交通大学土木工程学院,四川成都610031

出　　处：《工程力学》2011年第12期119-125,共7页Engineering Mechanics

基　　金：国家重点基础研究发展计划项目(2008CB425802);国家自然科学基金项目(40872181);交通部西部科技项目(2008-318-792-85)

摘　　要：Baker提出非线性破坏准则是一种广义的岩土体强度准则,常规的M-C强度准则、格里菲斯强度准则以及Hoek-Brown强度准则均为其特例。该文应用Baker非线性破坏准则,研究了高切坡稳定性判识、超前支护桩加固以及加固高切坡的地震屈服加速度和永久位移计算的极限分析方法。根据上限定理进行推导,分别建立了安全系数以及屈服加速度系数与多个变量的函数,将相关问题转化为含有多变量的数学优化问题并给出了最优解。结果表明:切坡方式对高切坡稳定性、超前支护桩加固荷载有显著影响,对已加固高切坡的屈服加速影响较小。The non-linear failure criterion proposed by Baker is a generalized geotechnical strength criterion,and the conventional criterion such as M-C,Griffith and Hoek-Brown strength criterion are all special cases of it.Here,based on the Baker criterion,we studied the advance diagnosis of the high cut slope stability,the reinforcement method of pre-reinforced pile,and the critical acceleration and permanent displacement of failure system under seismic excitations.Meanwhile,the optimal solutions are also suggested by multivariable expression.At last,an example is given to prove the theory.The result shows both slope stability and the load of pre-reinforced pile,except for the critical acceleration,are both affected greatly by the cutting method effect.

关 键 词：高切坡 非线性强度准则 超前支护桩 上限定理 静动稳定性 

分 类 号：TU457[建筑科学—岩土工程]