2009 Fiscal Year Final Research Report
Establishment of the system for the risk evaluation of geohazards at volcanic soil slope in cold regions
| Project/Area Number |
19201035
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Hokkaido University |
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Principal Investigator |
MIURA Seiichi Hokkaido University, 大学院・工学研究科, 教授 (00091504)
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| Co-Investigator(Kenkyū-buntansha) |
AKAGAWA Satoshi 北海道大学, 大学院・工学研究科, 特任教授 (90360932)
ISHIKAWA Tatsuya 北海道大学, 大学院・工学研究科, 准教授 (60359479)
YOKOHAMA Shoji 北海道大学, 大学院・工学研究科, 准教授 (50299731)
KAWAMURA Shima 室蘭工業大学, 工学部, 講師 (90258707)
IWAHANA Go 北海道大学, 大学院・地球環境科学研究院, 特任助教 (70431327)
ITOU Yoshihiko 土木研究所, 寒地土木研究所, 上席研究員 (70360352)
NISHIMOTO Satoshi 土木研究所, 寒地土木研究所, 上席研究員 (40373211)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 寒冷地 / 火山灰質土 / 凍結・融解作用 / 斜面崩壊 / 粒子破砕 / 地盤防災 / 室内要素試験 / 数値解析 |
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| Research Abstract |
We elucidated the interaction between various factors which caused subsurface failure of volcanic soil ground subjected to freeze-thaw action in cold regions in terms of soil mechanics, and we proposed a new simple prediction method for the rain-induced slope failure in snow-melting seasons in consideration of the degradation of deformation-strength characteristics of geomaterials due to freeze-thawing. We also developed a geo-information database which integrated the various different kinds of information such as weather reports, geotechnical information, and records for past geohazards. Based on these achievements, finally, we developed the system which could evaluate a risk of rain-induced slope failure at subsurface layers suffered from freeze-thaw by using both above-mentioned prediction method and geo-information database.
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