泸定水电站特大断面引水洞变形加固及塌方处理

Deformation Reinforcement and Rock Slide Treatment of Diversion Tunnel with Extra-large Section in Luding Hydropower Stration

泸定水电站引水洞工程是目前国内在建的开挖断面最大、地质条件最为复杂的地下洞室之一,在2号引水洞开挖至K0+401.5处时,由于顶拱位置受陡倾角、大断层等地质因素影响出现塌方。为此,主要介绍对塌方影响区采取的加固措施及塌方段的处理方法。

The diversion tunnel of Luding Hydropower Station is one of underground caverns under construction currently in China with extra-large excavation section and most complex geological conditions. The rock slide happens in the location of K0 ＋401.5 m in the excavation of No. 2 diversion tunnel due to the steep dip and large fault in the location of arch crown. The treatment to the rock slide area and the reinforcement to the slide-affected zones are introduced herein.