Numerical Analysis for Influence of Joint between Caissons under Tsunami Overflow on Composite Breakwater

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  • ケーソン防波堤の津波越流時における目地の影響評価に関する数値解析

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In the initial report on a tsunami disaster in the Great East Japan Earthquake, a scouring at a joint between caissons was listed up as one of the causes of failure of a composite breakwater. Although posterior experiments proved that it was not crucial mechanism, a flow field behind a caisson was not investigated in detail in those experiments. In this study, to clarify a complicated flow field driven by jet from a joint and tsunami overflow, we carry out a numerical simulation by using a numerical wave flume based on an accurate particle method. Especially, we focus on a three-dimensional flow structure around a joint between caissons.

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