河川津波を対象とした樋門ゲート前面における結氷抑制対策の提案

機関リポジトリ オープンアクセス

書誌事項

タイトル別名
  • A PROPOSAL OF ICE CONTROL MEASURES FOR SLUICE GATE FRONT AGAINST RIVER TSUNAMI
  • A PROPOSAL OF ICE CONTROL MEASURES FOR SLUICE GATE FRONT AGAINST RIVER TSUNAMI

抄録

When the river tsunami occurs in the winter period, the operation of the gutter sluice gate can be prohibited by the influence of the drifting and jamming of ice floes, increasing the inundation risk inside the levee. Therefore, secure sluice gate operations are required against tsunami run-up during the icecovered period. In this paper, demonstration experiments are performed in the Aikoku sluice gate of the Shinkushiro-river, showing the effectiveness of ice control measures using submerged pumps. The field test presented that submerged pumps inhibited ice formation within a radius of about 2~2.5 meters around the installation location. In addition, numerical ice-thickness estimation showed that the method guaranteed the ice control effect up to the thickness of 0.63 m. Based on these results, the applicability of the method is further investigated in other rivers around the coast of eastern Hokkaido. This paper succeeded in showing the effectiveness of our novel ice control measure for actual rivers.

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