2013 Fiscal Year Final Research Report
Stability evaluation of volcanic slopes in cold regions
| Project/Area Number |
23241056
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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 |
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAWA Tatsuya 北海道大学, 工学研究院, 教授 (60359479)
KAWAMURA Shima 室蘭工業大学, 工学研究科, 准教授 (90258707)
YOKOHAMA Shoji 北海道大学, 工学研究院, 助教 (50299731)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 地盤工学 / 土砂災害 / 防災 / 火山灰質土 / 凍結融解履歴 |
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| Research Abstract |
The aim of this study is to reveal the failure mechanism of volcanic slopes in cold regions and to propose a prediction method on failure. To achieve the purposes, full-scale embankments were constructed under several conditions in Sapporo, Japan. A typical volcanic soil in the field was adopted as a soil material. After construction of embankments, changes in soil moisture, temperature, pore water pressure were investigated using devices such as soil moisture meters, etc. Simultaneously, a series of model tests was performed on small size slopes formed by the same material as that in the field to compare with the mechanical behavior of embankments. A series of triaxial tests was also conducted on compacted volcanic soils subjected to freeze-thaw cycles using a new apparatus. As a result, a reasonable prediction method of failure was proposed based on changes in water content, and its validity was confirmed.
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