根据昆明某石灰岩路基边坡破坏特征及附近采石场剖面特征,分析了该边坡演化过程和失稳机理,并据此提出了边坡支护建议。研究结果表明:边坡演化包括地质构造控制边坡裂隙发育、石灰岩溶解和红土覆盖层形成三个过程;边坡失稳机理为:边坡蠕动变形造成框格梁开裂并丧失其护坡作用,植被促进了边坡演化且不利于边坡稳定,降水最终诱发了边坡失稳。基于其演化过程和失稳机理,防水是该边坡支护的首要任务。 According to the failure characteristics of the limestone subgrade slope in Kunming and the profile features of nearby quarries, the evolution process and instability mechanism of the slope are analyzed, and suggestions for slope support are proposed accordingly. The results show that the slope evolution includes three processes: the fissure development of the slope, the limestone dissolution and the formation of the laterite overburden. The instability mechanism of the slope is: the creep deformation of the sill causes the slab girder to crack and lose the role of slope protection, Promote the evolution of the slope and not conducive to slope stability, precipitation eventually led to the instability of the slope. Based on its evolution and instability mechanism, waterproofing is the primary task of slope support.