多儿水电站泄水建筑物体型优化试验研究

Experiment research on form optimization of sluice structure of Duo'er hydropower station

通过水工模型试验研究,验证了多儿水电站泄水建筑物原设计方案的泄流能力、水面线分布等水力学技术指标。并采用复合曲线与扇形渠底局部抬高相结合的方法和渐变收缩挑流的消能方案优化了原设计方案中的溢洪道弯道段及出口段体型,有效地解决了由于水流冲击波引起的弯道水面高差过大以及尾水对对岸山体的冲刷影响的问题,并经过试验验证效果较好。以上研究成果为类似工程泄水建筑物的体型设计具有一定的借鉴意义。

Through the hydraulic model tests of Duo＇er hydropower station, many hydraulic technical indicators such as discharge capacity and water surface line distribution of sluice structures were given. Using compound curve combing with uplifting fan-shaped channel bottom and the contracted bucket dissipation projects to optimize the bend part and exit part of spillway in original design, this optimization solved the problem of the high water level amplitude because of the stream shock wave and the problem of tail water erode the mountain, were well validated by model tests. These results may present references for the optimized design of other flood-releasing works as well.