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针对某岩土互层混合高边坡开挖后的安全性,从定性和定量两个方面进行了分析。运用赤平投影与实体比例投影相结合的定性方法,分析得到其稳定坡角。开挖后该高边坡第Ⅰ级坡可产生楔形体破坏,并确定了其破坏规模;运用FLAC3D程序对该岩土互层混合高边坡进行数值分析,得出其开挖后最容易产生破坏的位置与定性分析法得出的结论一致,进而从提高边坡安全系数与控制危险滑动面两个方面出发,提出了合理的加固方案。
Aiming at the safety of a mixed rock and soil mixed high slope after excavation, qualitative and quantitative analysis is carried out. By using the qualitative method combining the stereoprojection and the entity proportion projection, the stable slope angle is obtained. After the excavation, the grade Ⅰ slope of this high slope can produce wedge-shaped body failure, and determine the scale of its destruction. Using FLAC3D program to carry out numerical analysis of the mixed slope of the interbedded rock and soil, it is found that the excavation is most likely to occur The location of the damage is in accordance with the conclusion of the qualitative analysis, and then a reasonable reinforcement scheme is put forward in terms of improving the slope safety factor and controlling the dangerous sliding surface.