| Title |
Estimating Unsaturated Shear Strength and Yield Load of Compacted Aggregate Sub-base Materials |
| Keywords |
base materials;yield load;yield function;shear strength;unsaturated soils;보조기층재료;항복하중;항복함수;전단강도;불포화토 |
| Abstract |
In general, conventional road pavements are designed under the assumption that the shear strength of geomaterials are under saturated state. In reality, however, most of the pavement geomaterials exists under the unsaturated state. To deal with this gap between saturated and unsaturated conditions, in this paper, unsaturated shear strength was estimated using the results from the triaxial compression test and soil-water characteristics curves. Then, yield loads were assessed using 2-Dimensional finite element method with the selected nonlinear elastic model and the Mohr-Coulomb yield criteria. In addition, various unsaturated condition and surface layer effects on the yield load of granular materials were identified. Therefore, the results demonstrated would provide a possibility to estimate bearing capacity of paved or unpaved roads using unsaturated soil mechanics. |