古城水电站千枚岩大塌方段施工处理技术

Construction processing technologies of phyllite collapse section of Gucheng hydropower station

结合古城水电站的工程概况,分析了该水电站发生变形塌方事故的原因,主要阐述了塌方影响段及塌方段的处理方案,指出大管棚技术应用于软弱地质隧道工程中具有一定的优越性。

Combining with Gucheng hydropower station engineering conditions, the paper analyzes the hydropower station deformation and col-lapse accident occurring causes, mainly describes the collapse influencing section and collapse section processing schemes, and finally points out that： there is certain priority in applying large pipe-shed technology in soft geological tunnel engineering.