STABILITY OF WAVE-DISSIPATING BLOCKS OF CAISSON BREAKWATER FOR STEEP AND SHALLOW FORESHORE CONDITIONS

Abstract

 Stability of tetrapod for breakwaters covered with wave-dissipating blocks was examined for steep and shallow foreshore conditions by two-dimensional hydraulic model tests. For the condition of 0.010≦Ho'/Lo≦0.048 and 0.35≦h/Ho'<0.85, the necessary mass of tetrapod becomes smaller than the calculated mass by Hudson type design formula. The stability number(Ns) for tetrapod was obtained experimentary in these conditions. Furthermore, the damage mechanism of wave-dissipating blocks at the end of slope was explained.