Drained residual strength of Little Belt Clay

K.K. Sørensen

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

Session: Laboratory and Field Testing

ABSTRACT: A series of multiple reversal direct shear tests have been conducted on both precut and intact undisturbed specimens of Little Belt Clay in order to investigate the post peak strain softening behaviour and to determine the drained residual strength properties of the clay. Little Belt Clay is characterised as a high plasticity heavily overconsolidated marine clay of Eocene age. Undisturbed samples were extracted from borings next to the Old Little Belt Bridge of 1935, which crosses the Danish strait Little Belt, in connection to the ongoing ground investigation for the Fehmarnbelt Fixed Link between Denmark and Germany. This paper presents the results together with previously unpublished results from an old series of direct shear test on Little Belt Clay which were conducted in connection to a similar ground investigation for the New Little Belt Bridge of 1970. The results are compared and discussed.

RÉSUMÉ: Une série de plusieurs tests de cisaillement direct inversé ont été menées sur des échantillons à la fois intactes et aux déformations post-pic, et une argile marine de grande plasticité fortement surconsolidée de l'âge Eocène. Des échantillons intacts ont été extraits de forages proches du vieux pont de Little Belt datant de 1935 qui traverse le détroit danois Little Belt, dans le cadre l'argile de Little Belt qui ont été menées dans le cadre d'une étude de sol similaire pour le nouveau pont de Little Belt datant de 1970. Les résultats sont comparés et discutés.

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