基于剪切位移的层状岩质边坡稳定性预测预报模型  

FORECAST MODEL FOR STABILITY OF LAYERED ROCKY SLOPE BASED ON OBSERVED SHEAR DISPLACEMENT

作　　者：陈志坚[1,2] 李筱艳[1] 孙英学[1] 张雄文[1] 

机构地区：[1]河海大学土木工程学院 [2]中国矿业大学(北京校区)岩石力学与分形研究所北京100083

出　　处：《岩石力学与工程学报》2003年第8期1315-1319,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划资助项目(2002CB412707)。

摘　　要：在阐述了层状岩质边坡的工程特性和控稳因素后,揭示了层状岩质边坡内地下水的分布特征。针对包气带裂隙水对边坡稳定性的重要影响,提出了将其概化为经水力折减后的面力的模拟方法,并将包气带水力折减系数作为反演参数,采用三维非线性有限元法和可变容差优化方法,建立了基于潜在滑裂面剪切位移实测值的边坡稳定性预测预报模型,该模型在江阴大桥等工程实践中取得了满意的效果。Based on engineering characters and stability controlling factors of layered rocky slope, the distribution characters of ground water in layered rocky slope are shown. The simulation method is proposed to simplify the effect of fissure water in aeration zone to slope stability as planar pressure discounted by hydrostatic discount rate. Then, the hydrostatic discount rate is taken as back-analysis parameter. 3D nonlinear FEM and the flexible tolerance optimization method are introduced to establish the forecast model for layered rocky slope based on observed shear displacement of potential slippage surface. This model has displayed satisfying results in Jiangyin Yangtze Bridge Project.

关 键 词：岩土工程 层状岩体 边坡 监测 可变容差法 预报模型 剪切位移 

分 类 号：TD824.73[矿业工程—煤矿开采]