华光潭一级水电站大坝边坡及基础开挖施工

Excavation of the side slope and foundation of the dam for Huaguangtan Firstcascade Hydropower Station

华光潭一级水电站大坝边坡及基础开挖,施工工期紧,施工条件困难,岩石结构复杂,安全风险大。在施工中根据实际地形和地质构造,采取相应施工工艺,用预裂爆破和梯段爆破相结合的方法,合理选择爆破参数,充分利用机械化作业,使得开挖建基面取得良好的形体效果,施工安全无事故,工期满足设计要求。

The excavation of the side slope and foundation of the dam for Huaguangtan Firstcascade Hydropower Station is short in construction period, difficult in construction conditions, complex in rock structure and big in safety risk. In the construction, the proper construction techniques such as the combination method of precracking blasting and bench blasting have been adopted. The blasting parameters were properly selected and the mechanical construction was fully used. Therefore a good shape of construction foundation surface has been gained without failure occurrence and the construction period met the requirements of design.