Abstract: With the rapid development of western highway construction in recent years，the disasters frequently occur along the roads. It is necessary to study the disasters and implement corresponding control measures. According to the analysis on engineering geological and hydrological conditions，geological structures and landslide characteristics of Waduan village landslide on the expressway from Yunyang to Fengjie in Chongqing，the formation mechanism of the landslide is summarized. Finally，the cause analysis of the landslide is carried out，and the prevention plan and treatment measures are proposed to provide reference for the renovation of expressway landslide in the future.

Key words: landslide, formation mechanism, cause analysis, control measures

摘要： 近年来西部公路建设突飞猛进，而公路沿线滑坡灾害也频繁发生，因此有必要对其深入研究并进行相应的方 案实施和工程治理。通过对重庆奉节—云阳高速公路挖断村滑坡的工程地质水文条件、地质构造及滑坡特征总结 了该滑坡的形成机制，对该滑坡进行成因分析，最后提出了防治方案及治理措施，对今后高速公路大滑坡的整治提 供了参考。

关键词: 滑坡, 形成机制, 成因分析, 治理措施