中文摘要：

弯曲溢洪道改扩建工程常需经过模型试验研究确定其消能优化方案，针对汤河水库除险加固工程改建方案中弯曲泄槽段急流冲击波及消能不充分等问题，通过水力学模型试验研究，推荐采用多级跌水与底流复合消能方式。在弯曲段一级消力池入口及出口设置斜向高低坎，二级消力池人口加消力坎、尾坎后设置防冲槽，形成多级跌水、两级消力池、消力坎、防冲槽等不同消能元件的组合，不仅有效利用了地形，而且改善了泄流流态，妥善解决了消能防冲问题。

英文摘要：

The model experiment is widely used as a key method to determine the reconstruction scheme of curved spill- way. With regard to the project problems as the torrent shock wave in curved chute and flood discharge energy dissipation in the reconstruction scheme of Tanghe Reservoir, a composite energy dissipation system of multi-stage plunge with bottom flow is recommended based on model-test results. The scheme is composed of the first-stage stilling basin with two highlow slope banks at the inlet and outlet in the curved chute and the second-stage stilling basin which has a baffle sill at the inlet and an anti-scour trench behind the baffle wall. The combination of various dissipators, including multi-stage plunge, two-stage stilling basin, baffle sill and anti-scour trench, could not only make full use of the terrain, but also improve the flow condition, thus properly solving the energy dissipation and scour prevention of the spillway.