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Hear Strength Behaviour of Natural Expansive Soils

Rashedul H. Chowdhury, Shahid Azam

In the proceedings of: GeoRegina 2014: 67th Canadian Geotechnical Conference

Session: Expansive Soils

ABSTRACT: Saturated and unsaturated shear strength of natural expansive soils from southern Saskatchewan was investigated in this study. The shear strength parameters were determined using direct shear test for saturated specimen (c' = 16 kPa and f' = 24°) and unsaturated specimen (c' = 16 kPa, f' = 24° and fb = 9°). Residual shear strength was determined to be c' = 5 kPa and f' = 16°, respectively. Further analysis was conducted to predict the unsaturated of shear strength using different empirical equations that use the Soil-Water Characteristic Curve to examine the best suitable approach for the investigated expansive soil.

RÉSUMÉ: La résistance au cisaillement de sols gonflants naturels saturés et insaturés du sud de la Saskatchewan a été étudiée dans cette recherche. Les paramètres de résistance au cisaillement ont été déterminés en utilisant le test de cisaillement direct pour les spécimens saturés ( c'= 16 kPa et ' = 24 °) et les spécimens non saturés ( c'= 16 kPa , f' = 24 ° et fb = 9°). La résistance au cisaillement résiduel a été déterminée comme ayant c '= 5 kPa et f' = 17. Une analyse plus poussée a été effectuée pour prédire la résistance au cisaillement en utilisant différentes équations empiriques qui utilisent la courbe caractéristique sol - eau pour examiner la meilleure approche pour le sol expansif étudié.

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Cite this article:
Rashedul H. Chowdhury; Shahid Azam (2014) Hear Strength Behaviour of Natural Expansive Soils in GEO2014. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GeoRegina14Paper150, author = Rashedul H. Chowdhury; Shahid Azam,
title = Hear Strength Behaviour of Natural Expansive Soils ,
year = 2014
}