山区公路已成为城市公路的重要组成部分,但由于人们对山区公路边坡塌方的成因及危害认识不足,预警措施不及时,每年山区公路的边坡塌方都给公路交通造成安全隐患,对交通运输网络的功能发挥造成影响,给人民生活和生产带来巨大损失。以北京密云琉辛路K30+700处崩塌成因及处理工程为例,从地形地貌、岩性、构造等方面探讨了边坡崩塌产生的原因,介绍了崩塌的处理措施及施工时注意事项,得到有关结论,为今后其他山区公路的边坡稳定性评价和崩塌防护提供借鉴。 However, mountainous highway has become an important part of urban road. However, due to the lack of understanding of the causes and hazards of landslides on mountainous road slopes, the warning measures are not timely. Each year, the landslide of mountainous roads poses a potential safety hazard for road traffic. The exertion of the function of the Internet has caused great losses to people’s lives and production. Taking the collapse cause and treatment project of K30 + 700 at Liuyun Road, Miyun County, Beijing as an example, the causes of slope collapse are discussed from the aspects of topography, lithology and structure. The treatment measures of collapse and precautions during construction are introduced. The conclusions can provide reference for slope stability evaluation and collapse prevention of other mountainous roads in the future.