2014 Fiscal Year Final Research Report
Residual-state creep strength behavior of soils for long-term landslide stability evaluation
| Project/Area Number |
24560608
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Ehime University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 地すべり / リングせん断試験 / 残留状態 / せん断クリープ / クリープ挙動 / 限界変位 |
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| Outline of Final Research Achievements |
In this experimental study, the range of shear creep displacement was found to be very narrow, from 1 to 1.03 in terms of shear creep stress ration (i.e., ratio of applied creep stress to residual strength). Regardless of the ratio of creep stress to residual strength, it was found that a constant amount of displacement exists for each soil type, which when reached, the displacement changes from 2nd stage creep to 3rd stage creep leading to creep failure. The results obtained from a series of tests were then used in numerical modeling of residual-state shear creep failure for clay materials using spring (elasticity), dash-pot (viscosity), and slider (plasticity) models. The test results and the results predicted by the numerical model were compared to reveal that the model is well acceptable.
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| Free Research Field |
地盤工学
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