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使用相似材料分别制作只含有非连续的层面和同时含有非连续的层面和非贯通的次级节理顺层岩体边坡小比例物理模型,进行离心机动力试验,研究边坡的动力响应和破坏机制以及非连续层面和次级节理对其的影响。试验结果证明:顺层边坡的动力响应对地震波的频率和边坡内部结构面的发育特征敏感,边坡结构面发育越复杂,边坡对地震波的频率响应越复杂,地形放大效应也越明显;顺层边坡的动力稳定性和破坏机制受结构面发育特征控制,含有次级节理的边坡动力稳定性更低,破坏范围也更浅,在破坏过程中还会出现次级节理的张拉破坏导致的岩体内部解体破碎,可能诱发岩石碎屑流。
Similar materials were used to make small-scale physical models of rock slope with only discontinuous layers and non-continuous and non-through secondary subgrade joints. Centrifuge dynamic tests were carried out to study the dynamic response of slope and The damage mechanism and the influence of discontinuous level and secondary level. The test results show that the dynamic response of the bedding slope is sensitive to the frequency of the seismic wave and the developmental features of the internal structural plane of the slope. The more complex the slope surface is, the more complicated the frequency response of the seismic wave is and the more obvious the effect is. The dynamic stability and failure mechanism of the bedding slope are controlled by the developmental features of the structural plane. The stability of the slope containing the secondary joints is lower and the damage range is also shallower. In the process of failure, secondary joints The destruction of the interior of the rock mass caused by the pull failure may cause rock debris flow.