2011 Fiscal Year Final Research Report
Study on physical and mineralogical factors that affect residual strength of landslide soil
| Project/Area Number |
22780221
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Keywords | 残留強度 / 配向性鉱物 / 比表面積 / リングせん断 |
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| Research Abstract |
In this study, we examined the physico-mineralogical properties, specific surface area and residual strength of soils collected from different landslides. The plotting of residual strength parameter as a function of total mineral content formed a chair-shaped curve, based on which we classify landslide soils into three distinct groups. The residual strength parameter had a tendency to decrease as the specific surface area increased. The statistical relationship that emerges out of this analysis allows all soils examined in the present study to be plotted near the regression curve. The results conclusively show that these relationships can elucidate the controlling factors and the mechanism of residual strength, and be used for predicting the residual strength parameter of a wide range of landslide soils that differ in terms of geology, soil type, mineralogical properties and shear strength.
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