Abstract
We have already examined about the theoretical aspects of constitutive models for unsaturated soils. From the results, it was recognized that the consideration of two suction effects was necessary to explain the mechanical behavior of unsaturated soils. Here a more general version elastoplastic model with these two suction effects is proposed. The schematic estimations of volume change behavior of unsaturated soils were performed using this model. The verification of the model was also examined simulating typical element test series. The model could well express them.
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