2014 Fiscal Year Final Research Report
Exploring long-travel conditions and mechanisms for a rock-on-snow avalanche
| Project/Area Number |
24656281
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geotechnical engineering
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGUCHI Takayuki 北見工業大学, 工学部, 准教授 (20310964)
NAKAMURA Dai 北見工業大学, 工学部, 准教授 (90301978)
YAMASAKI Shintaro 北見工業大学, 工学部, 助教 (40584602)
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| Research Collaborator |
HAS Baator
NAGATA Hidehisa
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 雪上滑走型岩石なだれ / 雪崩 / 模型実験 / 豪雪地域 / 地震 / 斜面災害 |
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| Outline of Final Research Achievements |
On 12 March 2011, earthquake-induced rock avalanches in Nagano and Niigata prefectures, Japan, traveled long distances over snow on gentle slopes. However, the conditions and mechanisms of long travelling has not known. We investigated the rock-on-snow avalanches in the field. Based on the field observations, we explored the influence of snow properties on the travel distance of a rock-on-snow avalanche in two experiments. (1) We dropped 0.5 and 3.0 kg of angular gravel, or gravel mixed with snow or water, onto a slope covered with snow. (2) We dropped 6 tons of rock and soil onto a 50-m-long slope covered with natural snow. In the first experiments, gravel mixed with snow traveled as far as gravel without snow, but gravel dropped on hard snow traveled farther. In the second experiment, impulsive compression produced a hard snow layer carrying rock and soil.
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| Free Research Field |
地盤工学
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