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在对兰州市某滑坡的自然形态、地质特征及滑坡变形特征的分析中,发现原边坡在开挖条件下稳定性较好,通过限定条件的二维刚体极限平衡原理进行滑坡稳定性安全系数计算,证明岩体结构因素对该滑坡的失稳滑动起关键性作尉.借助赤平投影图对结构面组合与边坡坡面的空间关系进行直观的解析,证明该种岩体结构对边坡稳定非常不利,解释了边坡的失稳原因.通过工程实例指出目前滑坡稳定性分析存在的问题,为岩体结构条件特殊的滑坡稳定分析提供了新思路.
Based on the analysis of the natural morphology, geological characteristics and landslide deformation characteristics of a landslide in Lanzhou City, it is found that the stability of the original slope is good under the conditions of excavation. The safety factor of landslide stability is determined by the limit equilibrium principle of two- Calculating and proving that the rock mass structural factors play a key role in the instability and sliding of the landslide.Through the stereographic projection, the spatial relationship between the structural plane and the slope is intuitively analyzed, The stability is very unfavorable, explaining the reason of slope instability.Through the engineering examples, the existing problems in landslide stability analysis are pointed out, which provides a new idea for the stability analysis of landslides with special rock mass structural conditions.