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应用 K.T.Chau在 A.Ruina单变量摩擦定律基础上建立的岩体系统分岔模型 ,分析了在实践中遇到的问题 ,结果表明边坡岩体系统在演化过程中会出现三个奇点类型 ,即焦点、结点及鞍点。在边坡岩体系统演化到焦点及结点处 ,即便有外界降雨因素影响 ,边坡最终会向稳定状态方向演化 ;而在鞍点处 ,边坡岩体将失稳。因此在同一地区 ,在相同外界扰动下 ,有的边坡岩体仍处于稳定状态 ,而有的边坡岩体将会失稳。该模型能较好地解释岩体的非线性演化过程
The application of KTChau to the bifurcation model of rock mass system based on A.Ruina’s univariate friction law has analyzed the problems encountered in practice. The results show that there are three types of singularities in the rock mass system during the evolution , That is, focus, node and saddle point. When the slope rock mass system evolves to the focal point and the node, the slope will eventually evolve to the steady state even though there is external rainfall. At the saddle point, the slope rock mass will not be stable. Therefore, in the same area, under the same disturbance, some slope rock mass is still in a stable state, while some slope rock mass will be unstable. The model can better explain the nonlinear evolution of rock mass