Berms deployed at the toe of conventional breakwaters may be needed to reduce bottom settlements and to limit scour in front of the structure. This is due to the influence of the berms upon the wave propagation and, hence, on the wave action on the armor. Then, submerged berms may be effective in increasing the stability of the armor layer, as well as of the soil-foundation system and in minimizing the wave overtopping discharge, if compared to straight sloped conventional breakwaters without a berm. This paper deals with the influence of submerged berms on the wave propagation toward the armor layer. In particular, the evolution of significant wave height on the berms and of the dynamic pressures acting on the bottom (also beneath the berm) are numerically modelled. The preliminary design of an ad hoc experimental modelling is also illustrated.
The role of submerged berms on the wave actions on rubble mound breakwaters
Celli, D.;Pasquali, D.;Di Risio, M.
2018-01-01
Abstract
Berms deployed at the toe of conventional breakwaters may be needed to reduce bottom settlements and to limit scour in front of the structure. This is due to the influence of the berms upon the wave propagation and, hence, on the wave action on the armor. Then, submerged berms may be effective in increasing the stability of the armor layer, as well as of the soil-foundation system and in minimizing the wave overtopping discharge, if compared to straight sloped conventional breakwaters without a berm. This paper deals with the influence of submerged berms on the wave propagation toward the armor layer. In particular, the evolution of significant wave height on the berms and of the dynamic pressures acting on the bottom (also beneath the berm) are numerically modelled. The preliminary design of an ad hoc experimental modelling is also illustrated.Pubblicazioni consigliate
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