目前山区高速公路经常出现多级边坡,传统的全局强度折减法只能求得边坡的最危险滑面,而次级滑动面往往会遗漏。针对该问题,提出一种新的局部强度折减法。该方法将已进入塑性区和未考虑破坏的区域采用弹性材料代替,其他区域土体进行强度折减,直至计算不收敛,可以得出多级边坡的潜在滑动面。通过二级边坡和复杂边坡算例验证了该方法的可行性,且获得的边坡潜在滑面可为工程加固提供建议和参考。 At present, mountainous expressways often show multi-level slopes. The traditional global strength reduction method can only obtain the most dangerous slippery slope of the slope, while the secondary slippery surface is often missed. Aiming at this problem, a new method of local strength reduction is proposed. In this method, elastic material is used instead of the plastic zone and the area without considering damage, and the strength of soil in other areas is reduced until the calculation does not converge, so that the potential sliding surface of multi-level slope can be obtained. The feasibility of this method is verified by the examples of secondary slope and complex slope, and the potential slip surface of the slope obtained can provide suggestions and references for engineering reinforcement.