NECESSARY HIGHT AND WAVE FORCE ON WAVE SPLASH BARRIER FOR COASTAL ROAD ON STEEP FORESHORE CONDITIONS

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  • 急勾配海底条件に対する越波防止柵の必要高さと作用波圧に関する検討

Abstract

<p> On July 28 in 2018, fifteen vehicles slid due to wave overtopping at a coastal road on the steep foreshore conditions. In this research, hydraulic model tests with irregular waves were conducted on a scale of 1/50 to reproduce the wave overtopping on the block mound seawall with 1/7 seabed slope for the wave and tidal condition when the accident occurred. The wave overtopping rate at the accident was 2×10-2 m3/s/m, and the necessary height of wave splash barrier was found to be 6.6m for the wave height condition of the accident. The characteristics of wave force on the wave splash barrier was measured by six load cells for wave height Ho’=1～10m. Based on the test results, the design wave pressure distribution was formulated as the function of the highest wave height Hmax, and the wave force reduction effect was disclosed for different block width conditions. The applicability of the formula was also confirmed for 1/30 seabed slope conditions.</p>

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