天生桥二级水电站引水隧洞不良地质洞段处理

Treatments for Bad Geological Sections of Conduit tunnels in Tianshengqiao- Ⅱ Hydropower Station

天生桥二级水电站长引水隧洞，埋藏深，外水压力大，沿线工程地质和水文地质条件极其复杂。施工中对通过断层破碎带、岩溶洞穴、暗河的不良地质洞段，采用高压固结灌浆和部分灌浆孔布设锚杆的方法加固围岩，取得了良好的效果和施工经验。

Along conduit tunnels of Tianshengqiao u I Hydropower Station, the conditions of enginnering and hydrological geology are very complicated. The tunnels were embedded deeply,and bear large pressureof outside water. During Construction I)eroid, some reinforce measures such as consolidate grouting with hightpressure, putting anchor bars into [)arts of grouting holes were adopted to teat broken areas of faults, karatcaves and undergroun river regions in bad geologlcalsections of conduit tunnels.