基于特大断面复杂地质的导流洞施工技术研究

Study on Construction Technology of Diversion Tunnel Based on Complex Geology of Large Cross Section

地质条件、围岩性质等因素对导流施工的影响较为显著,通过分析不同地质条件下的导流洞施工难点,系统探究了导流隧洞的分层分部开挖、台阶开挖、预留核心土样、超前导洞等开挖方法,根据相关工程实际阐述了较为常用的支护技术,为特大断面复杂地质导流洞施工提供科学指导。

The factors of geological conditions and surrounding rock properties have a significant impact on diversion construction,through the analysis of different geological conditions of diversion tunnel construction difficulties,this paper systematically explores the excavation methods such as diversion tunnel excavation by layers and steps,excavation of diversion tunnel,step excavation,reserving the core soil sample and exceeded diversion tunnel,and so on.According to the related engineering practice,the commonly used supporting technology is described in this study,and it can provide scientific guidance for the construction of large section complex geological diversion tunnel.