Thermo-hydro-mechanical effects on the behaviour of unsaturated soil-structure interfaces

Z. Fu, J. Infante Sedano, E. Evgin

In the proceedings of: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNC

Session: Unsaturated Soils I

ABSTRACT: This paper presents the results of a laboratory study on the mechanical behavior of an unsaturated soil-structure interface subjected to three different temperatures and matric suction variations. The structural component of the interface is a sand blasted steel plate. The soil used in the experiments is a mixture of fine sand and kaolin. Tests were conducted on both normally consolidated and overconsolidated unsaturated soils. Test results show that the combined effect of temperature and suction on the normally consolidated unsaturated soil-structure interface behaviour is in agreement with the published results available in the literature. However, for overconsolidated soil samples, the interface behaviour is different than that of normally consolidated soil-structure interfaces.

RÉSUMÉ: Cet article présente les résultats d'une étude de laboratoire sur le comportement mécanique d'une interface sol-structure non saturée soumise à trois températures différentes et des variations de suction matricielle. La composante structurale de l'interface est une plaque d'acier sablée. Le sol utilisé dans les expériences est un mélange de sable fin et de kaolin. Des essais ont été effectués sur des sols on-saturés normalement consolidés et surconsolidés. Les résultats des tests montrent que l'effet combiné de la température et de la suction sur le comportement de l'interface sol-structure pour un sol non-saturé normalement consolidé est en accord avec les résultats disponibles dans la littérature. Cependant, pour les échantillons de sol surconsolidés, le comportement de l'interface est différent de celui des interfaces sol-structure normalement consolidées.

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Cite this article:
Z. Fu; J. Infante Sedano; E. Evgin (2017) Thermo-hydro-mechanical effects on the behaviour of unsaturated soil-structure interfaces in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2017Paper653,author = Z. Fu; J. Infante Sedano; E. Evgin,title = Thermo-hydro-mechanical effects on the behaviour of unsaturated soil-structure interfaces,year = 2017}