斜坡式护岸越浪量分析

Analysis on overtopping of slope revetment

根据掩护功能不同对护岸允许越浪量进行分类规定是越浪量研究的方向之一,探索最大单波越浪量的量化计算对护岸后方排水设计具有重要参考意义。对国内外常用越浪量控制标准和计算公式进行总结对比,并以沙特海尔港南护岸越浪量计算为例量化探讨肩台宽度和参数相关性对越浪量计算的影响。结果表明,欧洲和美国规范规定的越浪量标准比中国和日本规范规定的越浪量标准严格;设置肩台可以有效降低越浪量计算值,考虑波高和水位的相关性也可以有效降低越浪量计算值;越浪量计算对波高和水位比较敏感,允许越浪量可以采用数量级梯度进行分级;对于允许越浪量要求比较严苛的海外现汇项目,适当考虑肩台和参数相关性对越浪量计算值的降低作用,可以提高承包商设计方案的竞争力。

Setting tolerable wave overtopping criteria based on the revetment function is one orientation in wave overtopping study.It makes sense to study the calculation of individual overtopping wave volumes,since it will facilitate the drainage design behind the revetment.We summarize the popular used tolerable wave overtopping criteria and calculation formulas,and discuss the impacts of the berm and the correlation of parameters in the calculation formulas based on the south revetment of the Ras Al Khair Port expansion project.The results show that the tolerable wave overtopping criteria listed in European standards and the United States standards are stricter than in Chinese standards and Japanese standards.Setting a reasonable berm and considering the correlation of wave height and water level can decrease the value of the calculated overtopping volume.The calculated overtopping volume is highly sensitive to wave height and water level,the tolerable overtopping volume can be classified in reasonable magnitudes.Considering the impact of the berm and the correlation of parameters in wave overtopping calculation can benefit the contractor,especially in projects that require extremely low overtopping discharge.