PERFORMANCE OF A DOUBLE-WATER-CHAMBER TYPE WATER EXCHANGE BREAKWATER WITH A MASSIVE BASE

Abstract

 In order to expand the effective range of wave frequency of a water chamber type breakwater, a double-water-chamber structure was newly proposed, and examined experimentally and theoretically. It has an additional function, such as a water exchange function , to an ordinal breakwater function. It was clarified that both the functions of wave energy dissipation and water exchange can be retained by installing a horizontal plate partly at the lower end of the second water chamber. In order to improve the stability of the new breakwater against stormy waves, performance of a new measure, typically an addition of a massive base to the breakwater, has been examined. It was confirmed that both the functions of wave energy dissipation and water exchange are also retained for this new breakwater.