不同约束层状边坡岩体结构稳定性位移判据

针对层状边坡岩体结构的变形特点,概括出实际边坡工程中常见的破坏形式,抽象出不同约束条件下岩梁结构简化分析模型。利用后屈曲能量准则建立的平衡稳定模态幅值方程,进一步研究结构分叉后平衡路径的演化途径,给出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,真实反映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。结合工程现场有效的量测手段,可方便、有效的判定层状岩质边坡的稳定性,补充了已有的岩体结构稳定性位移判据理论。

Displacement criterion of structure stability for rock mass bedding slope under various restriction

According to deformed specificities for rock mass bedding slope,the common failure forms in slope engineering are summarized,the rock beam structure model under various restriction in engineering locale are extract.Based on the modality amplitude equation of equilibrium stability built on post-buckling energy criterion,the regions nearby equilibrium bifurcation point and evolutions along equilibrium path are studied,the buckling and the shearing slip displacement criteria in the form of the upper bound slipping displacement and the ultimate length with shearing slip are given,reflecting the post-buckling deformation and failure of structure rock mass.The displacement criteria given in the paper and the available measure method in engineering locale are used to predict the stability of the rock slope,supplementing the stability displacement criteria.