不规则波作用下带挑檐直立堤爬高与越浪量试验

Experiment of wave run-up and overtopping of vertical breakwaters with wave return wall under irregular wave

通过物理模型实验,对带挑檐直立堤在不规则波作用下的爬高和越浪量进行观测,分析墙顶超高、挑檐宽度以及波坦等影响因素。结果表明:直立堤波浪爬高主要与波高有关,周期影响不大;堤顶超高、挑檐宽度和波坦是直立堤越浪量的重要影响因素,但挑檐宽度对直立堤越浪量的影响程度与堤顶超高有关。根据试验结果,提出了直立堤波浪爬高和越浪量计算方法,为实际工程设计提供参考。

Based on the physical model experiment,we study the wave run-up and mean overtopping of vertical breakwaters with the wave return wall under irregular wave,and analyze the influence of main factors such as the levee free-board,horizontal extension of wave return wall and wave evenness.The results show that the main factor affecting the wave run-up is wave height,but wave period has little effect on it.Furthermore,the levee free board,horizontal extension of wave return wall and wave evenness are important determinants of the mean overtopping of vertical breakwaters.It is noteworthy that the extent of influence of horizontal extension of wave return wall is related to the levee free-board.On the basis of the physical model experiment,the new calculation formulas on the wave run-up and mean overtopping of vertical breakwaters are set out,which can serve as a reference for the engineering design.