高防浪墙土石坝波浪爬高对比分析

Comparative Analysis of Wave Run-up of High Wave Wall Earth Rockfill Dam

针对高防浪墙在坝坡坝顶附近由倾斜变为直立的情况,利用数值模拟和物理模型试验的方法对波浪爬高计算进行相互印证。对不同波浪要素、坝前水深工况进行分析,研究高防浪墙对水库波浪爬高的影响。结果表明,同一波浪要素针对不同水库水深时,波浪爬高随着水库水深呈倒抛物线趋势;波浪爬高在水深位于防浪墙直立段与坝坡斜坡段交汇处最大;当墙前水深高于直立段与斜坡段交汇处时,与数模和物模结果相比,规范法计算的波浪爬高偏大。研究结果可为土石坝工程设计时考虑波浪爬高影响的高防浪墙顶高程精细化设计提供参考。

In view of the case that the high wave wall changes from inclined to vertical near the dam slope and crest,numerical simulation and physical model tests were used to mutually verify the calculation of wave run-up.The working conditions of different wave elements and water depth in front of the dam were analyzed to study the impact of high wave walls on wave run-up in the reservoir.The results show that when the same wave factor is applied to different reservoir depths,the wave run-up shows an inverted parabolic trend with the reservoir depth;The maximum wave run-up occurs at the intersection of the vertical section of the wave wall and the slope section;When the water depth in front of the wall is higher than the intersection of the vertical section and the slope section,the wave run-up calculated by the standard method is larger compared with the results of mathematical and physical models.The finding can provide a reference for the refined design of the top elevation of high wave walls considering the impact of wave run-up in the design of earth-rockfill dam.