强涌水条件下碎裂岩体隧道快速施工技术

Rapid Construction Technology of Tunnel in Cataclasite Rock with Strong Gushing Water

以在建雅康高速公路前碉3#隧道碎裂岩体强涌水条件下的隧道施工为背景,运用理论分析、数值仿真、现场验证等方法,在对碎裂岩体强涌水及其原因分析的基础上,进行了注浆加固效果仿真分析。进而确定了破碎岩体洞段堵水注浆方法,提出了破碎洞段堵水注浆和破碎洞段防排水施工工艺。实践表明,按照提出的方法及工艺能够明显减小隧道涌水量,具有较好的排水效果,可以保证碎裂岩体隧道正常施工和人员安全,取得了极大的经济效益和社会效益。

Base on the background of No.3 tunnel of Ya＇an-Kangding highway in cataclastic rock with strong gushing water,the reasons of gushing water were analyzed by applying theoretical analysis,numerical simulation and field verification.The simulation analysis of grouting reinforcement effect was carried out,the method of grouting for water blocking in the section of cataclasite rock was determined,the waterproof and drainage technology of cataclasite tunnel section were put forward.Practice show that the method and technology can significantly reduce the amount of water inflow in cataclasite tunnel and ensure the normal construction and personnel safety.They have better drainage effect and achieved great economic and social benefits.