老挝南塔河1号水电站溢洪道布置与水力设计

Layout and Hydraulic Design of Spillway for Nam Tha No.1 Hydropower Station in Laos

针对老挝南塔河1号水电站水头高、单宽泄洪流量大、出口流速大、天然河道窄、河床抗冲刷能力弱等难题,结合泄洪建筑物自身特点,优化溢洪道结构,确定合理的结构布置方案。笔者简要介绍溢洪道布置和水力设计。通过水力计算与试验验证,证明溢洪道布置合理,为同类工程设计提供一定的参考。

In view of the problems of high head,large flood discharge per unit width,large outlet flow rate,narrow natural river channel and weak anti-scouring ability of riverbed of Nam Tha No.1 Hydropower Station,combined with the characteristics of flood discharge buildings,the structure of spillway is optimized and a reasonable structural layout scheme is determined.The author briefly introduces the spillway layout and hydraulic design.Through hydraulic calculation and test verification,it is proved that the spillway layout is reasonable,which provides a certain reference for similar engineering design.