| 作成年度 | 2007年度 |
|---|---|
| 論文名 | Characteristics of meteorological condition and an example of countermeasures for road avalanches in recent years in Hokkaido、 Japan |
| 論文名（和訳） | 近年の北海道における法面雪崩の発生気象条件とその対策例 |
| 論文副題 | |
| 発表会 | ISCORD2007 The 8th International Symposium on Cold Region Development（第8回 寒地開発に関する国際シンポジウム） |
| 誌名（No./号数） | Intermational Association for Cold Region Development Studies(IACORDS) |
| 発表年月日 | 2007/09/25 ～ 2007/09/27 |
| 所属研究室／機関名 | 著者名（英名） |
|---|---|
| 雪氷チーム | 松下 拓樹（MATSUSHITA Hiroki） |
| 雪氷チーム | 松澤 勝（MATSUZAWA Masaru） |
| 雪氷チーム | 伊東 靖彦（ITO Yasuhiko） |
| 雪氷チーム | 加治屋 安彦（KAJIYA Yasuhiko） |
| 抄録 |
|---|
| A recent problem in Hokkaido is avalanches with “slip-through” phenomena、 in which snow slides through avalanche fences and onto roads. This paper analyzes the meteorological conditions that promote the occurrence of such avalanches. Additionally、 we propose a fence designed to prevent such avalanches、 and we show the results of a field test of its effectiveness.[*] The analysis shows that slip-through phenomena tend to occur when the snow is dry、 the temperature is -4 °C or below、 and the snowfall intensity is high. This suggests that snow tends to slip through an avalanche fence when it has been accumulated in a short period of time and it lacks shear strength to support the load.[*] The field observations confirm that snow accumulates upslope of the steel-mesh avalanche fence until it reaches the top of the fence. Such accumulation allows the fence to act as a snow wall. The steel mesh prevents snow from slipping through、 which hinders shear-strength weakening of the trapped snow. Installation of such mesh on conventional avalanche fences is expected to be effective in preventing avalanches with slip-through phenomena. |
| このサイトで提供される情報には、ＰＤＦファイルが使われています。ＰＤＦファイルをご覧頂くにはAdobeReaderが必要です、「Get AdobeReader」をクリックしてダウンロードしてください。 |  |
