INFLUENCE OF STRUCTURAL DIFFERENCE IN DROP－OFF WORKS ON THE SUCTION OUT PHENOMENON OF BACKFILL MATERIAL FROM DRY MASONRY REVETMENTS

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  • 落差工の構造の違いが空石積み護岸の裏込め材吸出しに与える影響に関する基礎的研究

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<p> Dry masonry revetment is one of Japan's traditional revetment construction methods, and its value is being reevaluated in recent years. However, the lack of knowledge on the strength of dry masonry revetments and the lack of clear design criteria have prevented their adoption as a method of revetment construction. This study focused on the mechanism of backfill material suction out from the inside of revetments, which is one of the causes of damage to dry masonry revetments, and aimed to clarify how the mechanism is affected by different structures of drop-off structures. The results showed that backfill material is sucked out by the pressure difference in the longitudinal direction, and that the tendency of suction differs depending on the structure of the dropout structure, that suction is active near the point of maximum flow velocity near the revetment, and that the rock weir is a structure that is less likely to cause suction.</p>

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