水布垭水电站地下厂房岩台岩体盖重固结灌浆

Consolidation Grouting of the Cover Plate of Rock Bench and Body of Underground Powerhouse

水布垭水电站地下厂房围岩软硬相间,下部绝大部分为Ⅳ～Ⅴ类围岩,强度低,且软岩与硬岩界面间发育有大量层间剪切带。电站地下厂房开挖地质条件十分复杂,通过精心研究设计,采用岩体本身作为盖板对下部岩台岩体进行大规模固结灌浆的方法加固围岩,取得了较好的效果和经验,确保了地下厂房的稳定,缩短了直线工期至少一个月,节省了工程投资。

The surrounding rocks of underground powerhouse of Shuibuya Hydropower Station is soft rock alternating with hard rock, most of them areⅣ～Ⅴrocks. Large-scale consolidation grouting in rock mass to strengthen surrounding rocks was adopted. It makes not only the stability of underground powerhouse but also shortens construction period and saves the project investment.