ダウンロード数: 165
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
a30b2p27.pdf | 1.07 MB | Adobe PDF | 見る/開く |
タイトル: | 透過性砂防ダムの土石流調節機構 |
その他のタイトル: | DEBRIS FLOW CONTROL BY GRID DAMS |
著者: | 芦田, 和男 江頭, 進治 栗田, 三津雄 荒牧, 浩 |
著者名の別形: | ASHIDA, Kazuo EGASHIRA, Shinji KURITA, Mitsuo ARAMAKI, Hiroshi |
発行日: | 1-Apr-1987 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. B |
巻: | 30 |
号: | B-2 |
開始ページ: | 441 |
終了ページ: | 456 |
抄録: | Debris flow control becomes a major problem to prevent and to mitigate sedimenthazards these ten years. A large number of concrete dams, called sabo dams, have beenconstructed to reduce or to control sediment runoff from mountain regions. Most of themare filled up soon by sediment in the areas of active sediment yield, decreasing theirsediment storage capacities. Concrete dams, consequently, could not have controlled debrisflows successfully if they lose their storage capacities. Instead of them, grid dams, whichare some kinds of open dams, may be attractive as a sediment control work.In the present study, two types of grid dam, zigzag and square grid dams, are chosenfor considerations, to investigate the mechanisms of debris flow control. Flume tests aremade with attention focused on the relation among pass rates of sediment through griddam, sediment particle sizes and openning lengths of grids. A mathematical model whichgives a boundary condition at the dam is presented to evaluate the pass rate of sedimentthrough the dams.Numerical analyses are made with Asida and Egashira's governing equations of debrisflow for the outflowing sediment rate through the dams as well as the deposition of sedimentfrom the debris flows in the upstream reach of the dams. These simulated results comparewell with the data from flume tests. |
URI: | http://hdl.handle.net/2433/72026 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html |
出現コレクション: | No.30 B-2 |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。