基于联合分布法的岩坡稳定可靠分析研究  

Study of probabilistic rock slope analysis based on the jointly distributed random variables method

作　　者：韩孝峰 孙树林[1,2] 阮晓波[2] 陈晓磊[2] 

机构地区：[1]河海大学地球科学与工程学院,南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《河北工程大学学报（自然科学版）》2013年第4期58-61,共4页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：岩坡稳定性分析问题是一个可靠性问题,结合由Hoek-Brown经验准则衍生的线性参数,采用概率密度函数联合分布法确定平面滑动岩坡的最终安全系数的概率分布,借助Matlab软件对该计算过程实现表达,并对岩坡安全系数的影响因素进行敏感性分析。结果表明:概率密度函数联合分布法可以用作对平面破坏岩坡稳定性分析方法的补充及对岩坡稳定的前期快速评价;安全系数的分布曲线呈正态分布;正常情况下,水平地震加速度α对岩坡稳定的影响性强于张拉裂缝中水深Zw对岩坡稳定的影响性。Rock slope stability analysis is a probabilistic problem.The equivalent linear parameters derived from the Hoek-Brown criterion and the jointly distributed random variables methods are used to determine the probability distribution of the safety factor.The program from the Matlab is provided to take place of the calculation.The result confirms the feasibility of the jointly distributed random variables method and shows that the safety factor approximately obeys the normal distribution.The jointly distributed random variables method can provide a rapid evaluation.Besides,the sensitivity analysis to the parameters shows that the more effective parameter is the horizontal seismic acceleration rather than the water depth of the tension crack.

关 键 词：岩坡 等效参数 密度函数 联合分布 可靠度分析 敏感性分析 

分 类 号：TU42[建筑科学—岩土工程]