凤凰水库溢洪道陡弯段流态控制设计与应用

Application of flow regime control design for steep curved spillway of Fenghuang Reservoir

在凤凰水库除险加固工程中,因受地形、地质条件的影响和限制,改建溢洪道的陡槽段需按转弯布置。为了削减陡槽转弯段冲击波的不利影响、有效控制最大横向水面差,以尽量减小边墙高度并获得较好的结构受力状态,该文提出在陡槽转弯段设置两道导流墙、并采取渠底超高法的组合设计方案。通过实践应用证明,该方案对改善陡弯水流流态与流速分布十分有效,可供其他类似工程参考借鉴。

In the danger control and reinforcement of Fenghuang Reservoir,the chute section of spillway needed to be arranged in bending-type due to the influence and restriction of topographic and geological conditions.In order to eliminate negative effect of shock waves of curved chute,control the maximal transverse water-surface difference and reduce the height of side wall to get better operation condition for structure,we proposed the design scheme of setting two guide walls combined with super-elevation canal bed.The practical operation results show that the scheme is effective in improving the flow pattern of curved channel and the velocity distribution,which can provide reference for other similar projects.