Study on Practical Application of a Non-Wave Overtopping Type Seawall

A new type of seawall (non-wave overtopping type seawall) having a deep circular cross section is proposed in this study. The basic characteristics of this seawall are investigated through wave tank experiments and numerical simulations. In the experiments, measurements are made on the minimum crest height which satisfies non-wave-overtopping condition, wave pressure and water spray transported behind the seawall. The optimum dimension of wave dissipating blocks setting in front of the seawall is investigated for checking wave overtopping as well as securing stability. The fluid motion near the seawall is reproduced by numerical simulation based on SOLA-VOF method. These hydraulic factors of non-wave overtopping type seawall are compared with the conventional upright seawall and advantages of non-wave overtopping type seawall in control of wave overtopping are discussed.