2016 Fiscal Year Final Research Report
Study on the mechanism of reactivated landslide induced by the seasonal fluctuations in ground temperature
| Project/Area Number |
26560190
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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 |
Natural disaster / Disaster prevention science
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 積雪地帯 / 再活動型地すべり / 地温 / スメクタイト / リングせん断試験 / 残留強度 / 温度効果 |
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| Outline of Final Research Achievements |
We investigated the effect of seasonal fluctuation in ground temperature on shallow landslides occurring in the cold season from late autumn to early winter. The effect of temperature on shear strength was investigated on undisturbed smectite-rich slip surface soils collected from Busuno landslide, Niigata Prefecture. Test results showed that shear strength decreases with decreasing temperature and slow creep-like displacements can be induced by cooling. Ring shear experiments performed on many slip surface soils also demonstrated that this temperature effect on residual strength is typical for smectite-rich soils and prevail at slow shearing rate conditions in which platy smectite particles are highly oriented along the shear surface.
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| Free Research Field |
傾斜地保全
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