EFFECT OF WAVE FIELD ON TIME SCALE OF EROSION OF SAND SEABED UNDER RUBBLE MOUND OF COMPOSITE BREAKWATER COVERED WITH WAVE DISSIPATING BLOCKS
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- MURAOKA Hiroki
- トヨタ自動車株式会社 組立生技部
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- NAKAMURA Tomoaki
- 名古屋大学 大学院工学研究科土木工学専攻
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- CHO Yonghwan
- 名古屋大学 大学工学研究科土木工学専攻
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- MIZUTANI Norimi
- 名古屋大学 大学院工学研究科土木工学専攻
Bibliographic Information
- Other Title
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- 消波ブロック被覆堤マウンド下部の地盤侵食の時間縮尺に与える波浪場の影響
- ショウハ ブロック ヒフクテイ マウンド カブ ノ ジバン シンショク ノ ジカン シュクシャク ニ アタエル ハロウジョウ ノ エイキョウ
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Abstract
<p> Numerical analyses of 1/55.8-scale small experiments and 1/4-scale large experiments on sand erosion under the rubble mound of a composite breakwater were conducted to investigate the effect of wave field on the time scale of the erosion. Numerical results showed that the time for the averaged flow inside the mound to be offshore throughout the mound and the time for the wave field around the breakwater to be equilibrium were longer in the small-scale experiments than in the large-scale experiments, and consequently the erosion observed in the large-scale experiments was underestimated in the small-scale experiments. This suggested that the time for the erosion to reach the same depth as that of the large-scale experiments was longer than that estimated according to the Froude similarity law.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 76 (2), I_865-I_870, 2020
Japan Society of Civil Engineers
