Abstract: The slope at diversion tunnel entrance has poor geological surrounding rocks. As a result, many cracks appeared due to blasting disturbance, and several collapses occurred in the following two days after heavy rainfall on 2nd October, 2018. In this paper, the monitoring and early warning before collapse, emergency measures, monitoring results after collapse and reinforcement schemes are presented. Moreover, the causes of collapse are summarized, which can provide reference for safety and stability analysis as well as monitoring and early warning of slopes.

Key words: slope collapse, monitoring and early warning, slope monitoring

摘要： 导流洞进口边坡地质围岩差，受爆破扰动出现多条裂缝，加之2018年10月2日强降雨影响，于10月3~4日出现多次垮塌。就垮塌前监测预警、应急措施和垮塌后监测成果、加固方案进行梳理，在梳理的基础上总结垮塌原因，为工程边坡安全稳定分析和监测预警提供参考。

关键词: 边坡垮塌, 监测预警, 边坡监测