羊湖水电站引水隧洞较大的塌方及其工程处理

羊湖电站地处西藏高原，气候恶劣，地质构造复杂，引水隧洞沿线断层、破碎带较多，典型的有Ｆ１、Ｆ２、Ｆ３、Ｆ４、ｆ１、ｆ２、ｆ３、ｆ４断层及破碎带，在断层和破碎带施工中曾多次发生大的塌方，由于处理及时、措施得当，因此都收到良好的效果。隧洞施工为高原缺氧环境下，小断面长隧洞的塌方处理，探索出一条新路子。

Collapse in Power Tunnel at Yangzhuoyong Lake Hydropower Station and Engineering Treatment

Yangzhuoyong Lake hydropower station is located in the Tibet Plateau with harsh climate and fractured geological structure. There are many faults and fractured zones along the alignment of the power tunnel,such as faults F1,F2,F3,F4 and fractures f1,f2,f3,f4. Collapse was taken place many times during construction in fault zone and fractured zone.However,proper treatment and measures were taken with good results. The tunnel construction experience provide a new way for collapse treatment in long tunnel with small section in oxygen lacking plateau environment.