Abstract
This research had grasped stability characteristic of wave dissipating blocks by plane hydraulic model experiment and obtained the underlying data of the future design to caisson breakwater covered with wave dissipating blocks against the various conditions by about 60 degrees of sharp-angled incident wave. The main conclusions are as follows. (1) The wave height ratio front of wave dissipating blocks is influenced by generation status of meeting wave and is highest in case of wave dissipating blocks to start from the middle when meeting wave attack from the stage up side. (2)A sharp-angled incident wave is transmitted to lower direction on the wave dissipating blocks crest while breaking and is making blocks in the shoulder part fall to down side. The damage mechanism is different during vertical incidence. (3)As a result, the increasing coefficient of wave dissipating blocks to about 60 degrees of sharp-angled incident wave is guessed at 1.7-2.7.
