ESTIMATION OF ALLOWABLE SETTLEMENT OF SLOPING REVETMENT BASED ON WAVE OVERTOPPING RATE

Abstract

In the performance based design, the settlement of a revetment should be verified against the design earthquake motion. The allowable settlement is determined from the difference between the design crown height and the crown height at which one expects the allowable wave overtopping rate.
Wave overtopping rates on vertical revetments or mild slope revetments can be evaluated by using previous calculation figures. However, 53.8% of current revetments in Japan have slopes ranged from 1: 1/2 to 1: 3 as a result of reference research. Calculation figures for estimating the wave overtopping rates on revetments with these sloping walls are not proposed.
In this research, we first performed the hydraulic experiments to explore the wave overtopping rate on revetments with sloping walls. Secondly, we developed the predicted model for wave overtopping rates from the wave conditions predicted by Boussinesq equations. Utilizing the predicted model, finally, we developed the figure that determines the allowable settlement as a function of wave overtopping rates.