1996 · 77 citations · 0 references
EngineeringCivil EngineeringSoil SciencesGeotechnical EngineeringSoil MechanicsSoil ScienceConstitutive ModelingSoil CompactionSoil-structure InteractionUnsaturated Soil MechanicsConstitutive Modeling Of Unsaturated SoilsConstitutive Soil ModelingSoil Compaction ModelingSoil Constitutive ModelsSoil FabricSoil Fabric EffectsSoil PlasticityStress - Strain Behavior Of Soils
Recent advances in constitutive modelling of unsaturated soils are reviewed. Special attention is paid to the development of elasto-plastic formulations capable of reproducing the characteristic features of the mechanical behaviour of unsaturated soils. Common assumptions underlying recent model proposals are highlighted and specific experimental data supporting basic model hypotheses are discussed. Afterwards, the elasto-plastic framework is used as a basis for a better understanding of compacted soil behaviour. It is shown first that experimentally observed behaviour of a compacted soil can be satisfactorily reproduced by an elasto-plastic constitutive law. The effect of the soil fabric set up by compaction is then examined and its relevance to soil behaviour is discussed in the context of the elasto-plastic formulation for unsaturated soils. Finally, the analysis of an 'in situ' hydration test of a clay barrier illustrates the application of fan elasto-plastic constitutive law to the numerical analysis of engineering problems. (A) For the covering abstract see IRRD 881647.