金河水电站引水系统洞挖施工

金河电站引水系统洞挖施工包括引水洞及其1、2号施工支洞、调压室及其交通洞、压力管道。工程洞挖施工．战线长、工程量大、地质变化频繁，是整个工程施工的重点。实践表明：对于地质条件差的地段．必须坚持“短进尺、多循环、强支护、弱爆破”的原则，以确保安全。通过参建各方共同努力，洞挖施工进展顺利，质量优良．安全可靠。洞挖施工的程序、方法及技术要点可为西藏地区的洞挖施工提供经验和参考。

Construction of water diversion tunnel of Jinhe Hydropower Station

The construction of the water diversion system for the Jinhe Hydropowe r Project includes the construction of water diversion tunnel, No.1 and No.2 con struction tunnel, surge shaft well, transportation tunnel and penstock. Because of its long construction route, big project quantities and complex geological co nditions, the construction of water diversion system is very important for the w hole project. The practice showed that for poor geological conditions, the const ruction should insist on the principles of short drilling, much circulation, str ong support and weak blasting in order to ensure the safety. With the concerted effort, the construction of the tunnels is smooth in progress, excellent in qual ity, safe and reliable. The program, methods and technical points could be used for reference in the tunnel construction in Tibet region.