Abstract
This research investigated the difference in the characteristic of wave forces which acts on the superstructure by the existence and the scale of lower caves. The section form of sloping breakwater where settlement of wave dissipating blocks was taken into consideration was set up, and analysis using numerical wave flume (CADMAS-SURF) was carried out. As a result, horizontal wave forces acting on the superstructure increased with damage progress, and it is found out that sliding stability damages the damage section 2. Moreover, when the cave under superstructure exceeded 1 m, it became clear that sliding stability is damaged also for the basic section. The deformational limit of the dissipating blocks to the sliding stability of superstructure and the size of the cave under superstructure were clarified. These results are contributed to repair propriety judgment of wave dissipating blocks covering sloping breakwater.
