碎裂边坡岩体等效抗剪强度参数的确定  

Determination of the Equivalent Shear Strength Parameters of Fractured Rockmass Slope

作　　者：李澎[1] 苏爱军[2] 李旺[1] 张晟[1] 周涛[1] 

机构地区：[1]中国地质大学工程学院,武汉430074 [2]中国地质大学三峡地质灾害研究中心,武汉430074

出　　处：《安全与环境工程》2013年第1期21-25,共5页Safety and Environmental Engineering

摘　　要：为了更精确地求出岩体的等效抗剪强度参数,本文采用岩体结构面网络模拟方法获得了边坡岩体质量分级的RMR值,通过建立RMR值与Hoek-Brown强度准则的数学关系,可计算出岩体的等效内聚力c和等效内摩擦角,并以该等效参数为基础利用3DEC软件进行数值模拟,结果表明模拟结果与实际情况基本相符,从而验证了该方法进行碎裂边坡岩体抗剪强度参数的确定具有可行性,且能更精确地为工程设计和施工服务。For the purpose of calculating equivalent shear strength parameters accurately, this paper obtains the RMR value using the grading evaluation of rockmass quality based on the result of the network model- ing of structural plane,and works out the equivalent cohesion C and the equivalent friction angle q~ by es- tablishing the mathematical relationship between RMR and the generalized Hoek-Brown failure criterion. Then based on the above parameters, the paper makes the numerical simulation by using the 3DEC soft- ware, and the result shows that the simulation results accord with the actual situation. So, using this meth- od to determine the rockmass strength parameters is feasible and it can provide more accurate service for engineering design and construction.

关 键 词：碎裂边坡岩体 等效抗剪强度参数 结构面网络模拟 Hoek—Brown强度准则 RMR岩体分类 

分 类 号：TU457[建筑科学—岩土工程]