上硬下软岩质边坡破坏特征及加固措施

为了探讨龙源电厂场区道路工程中，上硬下软结构边坡破坏特征和加固措施，运用数值模拟分析了边坡开挖对此类坡体结构坡体变形及坡体应力的影响，并结合工程实例分析此类边坡变形特征和加固措施。结果表明:①上硬下软的坡体结构以及上部硬岩结构面的发育是坡体变形失稳的主要内在因素。坡体开挖后临空面的形成是坡体变形失稳的必要条件；②为防止坡体结构为上硬下软的边坡破坏，必须加固软岩，防止软岩变形，稳固坡脚。

Failure Properties of Top Hard-bottom Soft Rock Slope and the Reinforcement Measures

In order to explore the failure properties of and the reinforcement measures for the top hard-bottom soft slope in the road engineering of Longyuan Power Plant, the effects of the excavation on the deformation and stress of such slope were analyzed by means of numerical simulation and, in relation to engineering examples, the slope deformation characteristics and the reinforcement measures were studied. The result shows that, ① as to top hard-bottom soft slope, the development of such structure and the upper structural plane in hard rock is the main intrinsic factor leading to deformation and instability of the slope, while the free face formed after the excavation is the necessary condition; ② for the purpose of preventing the slope failure, the soft rock must be reinforced to avoid deformation and stabilize the slope toe.