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岩质边坡大多地处高山峡谷地区,地形较陡,地质情况复杂,其稳定性评价问题较难。选择典型地质剖面,对该高陡边坡的稳定性进行了探讨。根据设计的剪出口高度、不同结构面切割岩体厚度计算工况,确定该岩质边坡的滑移模式和最不利破坏面。在此基础上,计算其在自然状态、自然+地震、饱水状态和饱水+地震条件下的稳定性,结果表明在饱水+地震条件下的稳定性不满足工程稳定性要求;研究了发生滑坡改变地形条件下该地段的稳定性,为治理和工程选址提供了依据。
Most of the rocky slopes are located in the alpine gorge area, with steep terrain and complicated geological conditions, so the stability assessment problems are more difficult. Select the typical geological profile, the stability of the high steep slope were discussed. According to the designed shear outlet height and the calculation of rock mass thickness under different structural planes, the slip mode and the most disruptive surface of the rock slope are determined. On this basis, the stability under natural conditions, natural + earthquake, saturated water conditions and saturated water + earthquake conditions are calculated. The results show that the stability under saturated water + earthquake conditions does not meet the requirements of engineering stability. Landslide changed terrain conditions of the stability of the lot, for the governance and site selection provided the basis.