长河坝水电站泄洪系统出口高陡边坡开挖施工技术

Excavation and Construction Technologies of High and Steep Slope in the Outlets of Spillway Tunnels of Changheba Hydropower Station

长河坝水电站泄洪放空系统出口边坡地质条件复杂,边坡高陡,施工道路布置困难,开挖期边坡稳定及安全问题突出。通过超前谋划施工通道,分析开挖区的特点,对不同开挖部位提出了有针对性的爆破方案并予以实施,安全顺利地完成了边坡开挖。

Because the slope in the outlets of spillway tunnels of Changheba Hydropower Station is high and steep and the geological conditions are also complex, the construction road arrangement is very difficult for slope excavation and construction and the slope stability and security issue in excavation process are serious. Through planning construction access in advance and analyzing the characteristics of excavation area, different blasting scheme is proposed for different excavation sub-area. The implementation of blasting schemes ensures the successful and safe completion of slope excavation.