Prediction of the Fraser River sand response to Å“dometric loading using the NorSand soil model

V. Castonguay

In the proceedings of: GeoVancouver 2016: 69th Canadian Geotechnical Conference

Session: FUNDAMENTALS - IX Physical & Numerical Modelling

ABSTRACT: The NorSand critical state conditions. A direct numerical integration of the model was programmed using the software MatLab. Numerical predictions are presented for the Fraser River sand as extensive laboratory data and NorSand simulation parameters are readily available in the literature. Three different relative densities are simulated and compared with matching laboratory results. The stress-strain behaviour predicted shows an overall good agreement with the laboratory data. However, predicted effective horizontal stresses are consistently too high compared to laboratory data (as well as coefficient of lateral pressure at rest values) and a good fit can only be achieved by considerably reducing the shear rigidity. This rigidity softening in turns leads to unrealistically high deformations.

RÉSUMÉ: comportement des sols sous chargemRiver, des résultats de laboratoire et de simulations numériques étant aisément disponibles dans la littérature pour ce matériau. Trois densités relatives différentes sont simulées et comparées aux résultats de laboratoire correspondants. Le comportement en contrainte-déformation prédit numériquement montre une bonne concordance avec les données de laboratoire disponibles. Par contre, les contraintes effectives horizontales prédites sont systématiquement trop élevées par rapport au données de laboratoire (de même que les valeurs de coeffiencent des terres au repos), une bonne rigidité de cisaillement. Une telle réduction de la rigidité mène par contre à des déformations finales beaucoup trop importantes et irréalistes.

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Cite this article:
V. Castonguay (2016) Prediction of the Fraser River sand response to Å“dometric loading using the NorSand soil model in GEO2016. Ottawa, Ontario: Canadian Geotechnical Society.

@article{3920_0527150310,author = V. Castonguay,title = Prediction of the Fraser River sand response to Å“dometric loading using the NorSand soil model,year = 2016}