构皮滩水电站尾水系统布置设计

Layout Design of Tail Water System of Goupitan Hydropower Station

构皮滩水电站尾水系统地质条件复杂,软岩成洞及尾水边坡稳定性差。设计单位通过采取调整尾水边坡坡比并给合喷锚支护、坡面保护、排水、预应力锚索和锚筋桩等一系列的布置优化和支护措施后,不仅解决了尾水出口与导流洞出口布置上的矛盾,而且改善了尾水隧洞成洞条件,提高了尾水边坡的自稳能力,使尾水建筑物设计方案技术可行、经济合理、施工方便。

The geological conditions of tail water system are complex, for example, tunnels penetrate soft rock, and stability of the outlet sides is bad. The designer solved the contradictory of outlet in layout between tail and diversion tunnels by means of layout optimum design, as well as made the design scheme feasible in technology through taking a set of support measures such as modifying ratio of slope, shotcrete support, surface protecting, drainage , pre -stress anchor cable, anchor role pile, and etc