文章在简要介绍广西蒙山新古排水电站工程概况的基础上,对引水隧洞开挖过程中遇到的各类隧洞塌方原因作了详细的分析,并对塌方分类、预防和处理措施作了论述。针对隧洞施工中发生的大塌方问题,监理工程师根据设计图纸文件及水工支护施工技术规范,提出了“超前临时支撑法”施工处理措施,且对该施工处理技术进行简要概述,这在引水隧洞开挖过程中起到了参谋和决策作用。 Based on the brief introduction of the project of Xinqu Hydropower Station in Mengshan, Guangxi, this paper analyzes the causes of landslides of various tunnels encountered in the excavation of diversion tunnels in detail and discusses the classification, prevention and treatment of landslides. According to the landslide problem occurred in the tunnel construction, the supervision engineer puts forward the construction treatment measures of “advanced temporary support method” according to the design drawings and documents and the technical specifications of hydraulic support construction, and gives a brief overview of the construction treatment technology. In the diversion tunnel excavation process played a staff and decision-making role.