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Coupling hydraulic with mechanical models for unsaturated soils

DAICHAO SHENG ; ZHOU, An-Nan

Canadian geotechnical journal, 2011-05, Vol.48 (5), p.826-840 [Periódico revisado por pares]

Ottawa, ON: NRC Research Press

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Título:
Coupling hydraulic with mechanical models for unsaturated soils
Autor: DAICHAO SHENG ; ZHOU, An-Nan
Assuntos: couplage hydromécanique ; courbe de rétention d’eau (CRE) ; density effect ; Earth sciences ; Earth, ocean, space ; effet de densité ; Engineering and environment geology. Geothermics ; Engineering geology ; Exact sciences and technology ; Fluid mechanics ; Geotechnology ; hydromechanical coupling ; rétention de l’eau du sol ; Soil mechanics ; Soil permeability ; soil-water characteristic curve (SWCC) ; soil-water retention ; Soils ; sols non saturés ; unsaturated soils
É parte de: Canadian geotechnical journal, 2011-05, Vol.48 (5), p.826-840
Descrição: This paper presents an alternative method to couple the hydraulic component with the mechanical component in a constitutive model for unsaturated soils. Some pioneering work on hydromechanical coupling is reviewed. Generalized constitutive relations on coupled hydromechanical behaviour are introduced. These generalized constitutive relations are then incorporated into existing mechanical and hydraulic models for unsaturated soils. A new coupling mechanism is proposed based on the fact that soil-water characteristic equations are usually obtained for constant stress, not constant volume. The proposed coupling mechanism also satisfies the intrinsic relationship between the degree of saturation and the volumetric strain for undrained compression. Numerical examples are presented to show the performance of the proposed model in predicting soil behaviour along drying and loading paths. Finally, the model is validated against experimental data for different soils.
Editor: Ottawa, ON: NRC Research Press
Idioma: Inglês

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Coupling hydraulic with mechanical models for unsaturated soils

DAICHAO SHENG ; ZHOU, An-Nan

Ottawa, ON: NRC Research Press

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