复杂地质条件下小断面引水隧洞施工技术研究

Study of construction technique for small section diversion tunnel under complicated geological conditions

驮英水库灌区东干渠东攀隧洞处于岩溶区,溶洞较为发育,岩体较破碎,隧洞地质复杂,小断面隧洞开挖支护施工难度大,施工安全风险系数高,对爆破技术要求高。本文结合隧洞施工介绍在复杂地质条件下进行小断面引水隧洞施工的技术要点及质量、安全控制措施。

Dongpan tunnel of East main channel of Tuoying Reservoir irrigation zone is located in karst area with relatively developed solution cavern,fractured rock mass.The complicated geological conditions render difficulties for the excavation and support of small section tunnel,high construction safety risk coefficient,strict requirements for blasting technique.Combined with the construction of Dongpan tunnel,the author demonstrated the key technical points,the quality and safety control measures for construction of small section diversion tunnel under complicated geological conditions.