1. 水库土石坝阶梯式上游护坡消浪效果数值模拟研究.
- Author
-
杨海滔, 吴允政, 巩维屏, 宋双喜, 彭胜利, and 孙万光
- Abstract
Stepped slope protection can not only meet the needs of cultural landscape, but also has a good effect of reducing waves. In recent years, it has been applied in some dam projects, but there is still a lack of systematic research on relevant design parameters. In this paper, a two-dimensional numerical wave model was established based on the velocity boundary method according to the medium and large reservoir dams. The influence of step layout range, step size, dam slope degree and wave smoothness for wave run-up was analyzed. The results show that, compared with the smooth slope protection, the stepped slope protection can effectively reduce the wave run-up. For the same wave smoothness and dam slope degree, the wave run-up decreases with the increase of step layout range, and decreases first and then increases with the increase of step height. The recommended step layout range is 1 times the wave height above the free water surface to 2 times the wave height below the free water surface. The recommended step height is 0.4 times of the incident wave height, and the wave attenuation coefficient is between 60% and 70%. In the recommended stepped slope protection arrangement, the wave run-up increases with the increase of wave smoothness and decreases with the softening of dam slope. When the slope is lower than 1∶3.0, the influence of slope coefficient on wave run-up weakens to some extent. According to the comprehensive roughness and osmosis coefficient calculated in this paper, the wave run-up of stepped slope protection can be estimated preliminarily, which provides reference for similar engineering design. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF