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Modeling of the Tensile Strength of Unsaturated Granular Soil Using Soil-water Characteristic Curve  

Kim Tae-Hyung (Division of Civil and Environmental Engrg., Korea Maritime Univ.)
Kim Chan-Kee (Dept. of Civil Engrg., Dajin Univ.)
Kim Tae-Hoon (DAEWOO E&C)
Publication Information
Journal of the Korean Geotechnical Society / v.20, no.7, 2004 , pp. 171-181 More about this Journal
Abstract
This study was conducted to explore the tensile strength models in granular soil at the full range of unsaturated state. Direct tension experiments were carried out with a newly developed direct tension technique. The measured experimental data were compared with theoretical models developed by Rumpf and Schubert for monosized ideal particulate solids at the unsaturated state. To do this, the soil-water characteristic curve obtained from a suction-saturation experiment was used to define the unsaturation state and the negative pore water pressure with different water content levels, which are important factors in theoretical tensile strength models. The nonlinear behavior of the tensile strength for unsaturated granular soil at the pendular state is appropriately simulated with Rumpf's model. For the funicular and capillary states, the predicted trend by Schubert's model is properly matched with the experimental data: tensile strength steadily increases and reaches a maximum value and then decreases until it reaches zero. This comparison supports the concept that the tensile strength of unsaturated real granular soil can be approximately simulated with theoretical models.
Keywords
Soil-water characteristic curve; Suction-saturation; Tensile strength; Unsaturated state;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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