著者

下田 義文 鈴木 真次 石川 信隆 古川 浩平

出版者

公益社団法人 土木学会

雑誌

土木学会論文集 (ISSN:02897806)

巻号頁・発行日

vol.1993, no.480, pp.97-106, 1993

被引用文献数

2

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本研究は, コンクリート製砂防ダムの耐土石流衝撃設計に資するため, まず個別要素法による衝撃応答計算モデルを作成し, 次にこのモデルを用いて土石流に含まれる巨礫の衝撃に対する砂防ダム袖部の衝撃応答解析を行った. この結果, 個別要素法による衝撃応答計算モデルが, 砂防ダム袖部の小型模型実験における衝撃応答, サンドバッグの緩衝効果および実砂防ダムの土石流による被害形態をよくシミュレートできることを確かめた.

著者

嶋 丈示 松原 智生 石川 信隆 水山 高久

出版者

公益社団法人 砂防学会

雑誌

砂防学会誌 (ISSN:02868385)

巻号頁・発行日

vol.71, no.2, pp.3-12, 2018-07-15 (Released:2019-07-15)

参考文献数

15

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This paper presents an experimental evaluation method on the capture performance of debris flow by a steel open type Sabo dam (hereafter, steel open dam). First, the hydraulic tests for steel open dams are conducted to examine the outflow sediment, the capture height-time relation and the grain size distribution of outflow sediment by changing the riverbed slope and slit interval of dams. Herein, the capturing performance types by a steel open dam are proposed as the classification such as “complete blockage type”, “partial blockage type” and “control type”. It was found that the steel open dam with narrow slit interval showed “complete blockage type” which represents a good capture performance, regardless of riverbed slopes. It was also discovered that the capture height-time relation was a good measurement for the examination of capture process of debris flow. Second, the three different types of steel open dams in the most downstream are tested against three different scales of debris flow. It was confirmed that a new type steel open dam for the most downstream was proposed and showed good capture performance against different scales of debris flow.