2020 Volume 76 Issue 2 Pages I_971-I_976
The characteristics of wave overtopping with rubble stones were analyzed on three coastal roads by field observations. The cases of vehicle damage and traffic hindrances were also investigated for a coastal road based on the records prepared by the police and the road administrator. Hydraulic model experiments with a scale of 1/15 were conducted in order to obtain the relationship between wave run-up height and wave overtopping rate for typical seawall conditions. The wave force was measured due to random waves for three different stone diameter conditions using a one-component dynamometer, and the critical run-up height of rubble stones was shown using non-dimensional wave force, which was measured wave force divided by stone weight. The movement patterns of rubble stones were determined by video analysis for four specific gravity conditions and three diameter conditions. Based on the experimental results, the stone run-up height can be calculated as a function of wave height. Furthermore, the effectiveness of the calculation method was also confirmed by the field observation data.
