HYDRAULIC MODEL EXPERIMENTS ON TSUNAMI WAVE FORCE CONTAINING SILT AND CLAY

DOI Web Site 6 References
  • SHIKATA Takemi
    株式会社ニュージェック 港湾・海岸グループ 海岸・海洋チーム
  • NIIDA Yasuo
    電力中央研究所 サステナブルシステム研究本部 気象・流体科学研究部門
  • KIHARA Naoto
    電力中央研究所 サステナブルシステム研究本部 気象・流体科学研究部門
  • KATO Katsuhide
    中部電力株式会社 原子力土建部 調査計画グループ

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Other Title
  • シルト・粘土を含む津波による波力に関する水理模型実験

Abstract

<p> Recently, it has been reported that the tsunami wave force increases more than the increment of hydrostatic pressure due to the increase of fluid density by tsunamis that entrain fine-grained sediments. On the other hand, there have been few cases in which the relationship between the wave force increase and bottom sediment, density, wave shape, and other factors have been verified. In this study, hydraulic model experiments simulating tsunamis containing silt and clay were conducted in order to understand the existence and conditions under which the wave force increases. In the experiments, the tsunami flow and fluid type were varied under controlled conditions such as fluid density and water temperature, and the effects on wave forces acting on two types of structures, full-width walls and columnar walls, were verified. Although the water surface angle and leading edge velocity of mud containing silt and clay differed slightly from those of fresh water, there was no significant increase in the maximum wave force of the mud, and it was limited to the hydrostatic pressure increment associated with the increase in fluid density under all conditions.</p>

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