直立式防浪墙对单坡斜坡堤越浪量分布的影响

Influence of Vertical Crown-wall on Probability Distribution of Wave Overtopping over a Sloped Seawall

摘要:

考虑到国内普遍带有防浪墙的斜坡堤在风暴潮下受到最大越浪量的破坏威胁，采用波浪水槽试验测定了破碎波情况下单坡带有直立式防浪墙上的单波越浪量，基于现有的单坡无防浪墙的越浪量分布计算公式，引入防浪墙影响因子，推导出单坡带有防浪墙的越浪量分布形状参数和越浪概率的计算公式.研究结果表明，越浪量分布形状参数、越浪概率都与相对出水高度、防浪墙相对高度有关.随着防浪墙相对高度的增大，形状参数呈指数增大趋势，而越浪概率呈指数减小趋势.研究结果可为海堤设计提供参考.

Abstract:

Considering the destructive threat of the maximum individual wave overtopping volume on domestically typical sloped seawalls with crown-walls, in this research, wave flume experiments were conducted to measure the individual wave overtopping volume over the sloped seawall with the crown-wall in breaking wave conditions. Based on the empirical fitting equations for the single sloped seawall without crown-walls, influence factors of crown-walls are introduced to the empirical formula for shape factor and probability of wave overtopping probability for seawalls with crown-walls. It is concluded that the shape factor and the probability of wave overtopping are both related to the relative freeboard and the relative wall height. The shape factor increases exponentially with the increasing of the relative wall height, while the probability of wave overtopping decreases exponentially as the wall height increases. The experimental results can be taken as reference for seawall design.