新疆柳树沟水电站工程导流洞的洞顶塌腔处理

Treatment of Top Collapse Cavity of Diversion Tunnel,Liushugou Hydropower Station

针对柳树沟水电站导流洞的洞顶大塌腔,且不间断地掉石,施工中首先在塌腔下放置钢台车,在其保护下浇筑洞衬混凝土,后期向洞顶塌腔内采用固结灌浆的综合处理方案。经过近2 a的运行,塌腔处理效果良好。

Concerning the big top collapse cavity of the diversion tunnel, Liushugou Hydropower Station, and the continuous falling of rocks and stones, the steel trolley is stationed under the collapse cavity.With the trolley protection, the tunnel is concrete lined.Later, the top collapse cavity is treated by the operation of consolidation grouting.After two-year operation, the cavity treatment presents good effect.