娘拥水电站引水隧洞超高地温段综合施工技术

摘要

娘拥水电站引水隧洞罕见的超高地温给隧洞施工增加了难度，岩石表面温度达58℃，涌水温度为82℃，爆破孔内温度为48～76℃。通过介绍隧洞降温系统、炮孔冷却循环系统等，总结和探讨了在高地温条件下的隧洞施工技术，从而保证了在高地温情况下隧洞的正常掘进。%The unusual ultrahigh-earth-temperature adds difficulty to the diversion tunnel construction in Niangyong hydro-power station.The temperature of rock surface reaches 58 ℃,the temperature of gushing water reaches 82 ℃,and the temperature of blast hole is about 48 to 76 ℃.The paper discusses the tunnel cooling system,blast hole cooling system, and summarizes tunnel construction technology under ultrahigh temperature,which ensures the normal tunneling under ul-trahigh temperature conditions.