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根据边坡岩体渐进性破坏机理,分析了层状边坡岩体结构屈曲和后屈曲的实际变形和整体破坏过程;以其地质背景及力学作用机制为依据,考虑边坡的材料、变形特点及结构特征,抽象出实际工程中常见的满足岩梁简化条件的各种力学模型.应用后屈曲能量准则,进一步研究结构分叉后平衡路径的演化途径,给出不同约束条件下以边坡上部滑动位移、剪切滑动的极限长度等为控制变量的边坡溃屈和剪切滑动的位移判据.研究表明:该判据真实反映了层状边坡岩体结构由分叉点后屈曲性态到极值点后屈曲性态转化的耦合过程,补充了已有的岩体结构稳定性位移判据理论,可使边坡位移理论的研究进一步工程化.
According to the gradual failure mechanism of slope rock mass, the actual deformation and overall failure process of rock mass body structure buckling and post-buckling are analyzed. Based on the geological background and mechanics mechanism, considering the slope material and deformation characteristics And structural features, we abstract various mechanical models that are commonly used in practical engineering to meet the simplified conditions of rock beams. The post-buckling energy criterion is applied to further study the evolutionary path of balanced paths after bifurcation. Sliding displacement and ultimate length of shear sliding are used as displacement control criterions of slope collapse and shear sliding of the control variables.The results show that the criterion truly reflects that the rock mass of layered slope is composed of post-buckling bifurcation Coupling process of post-buckling state transition from state to extremum, which complements the existing theory of displacement criterion for structural stability of rock mass, can further study the theory of slope displacement.