Load testing of large diameter single drilled shaft foundations for the REM project in Montreal
R. Diab, L. D’Amours, D. Zirmi, J. Habib
In the proceedings of: GeoSt. John's 2019: 72nd Canadian Geotechnical ConferenceSession: Foundations
ABSTRACT: In 2018, the Caisse de Dépôt et Placement du Québec (CDPQ) awarded a $6.3 Billion Design-Build contract to the Joint Venture (JV) team NouvLR (led by SNC-Lavalin) for the design and construction of the Réseau Express Metropolitain (REM) in Montreal. Out of the 67 km network, over 25 km will be constructed on an elevated structure founded on single drilled shafts socketed into rock. In order to optimize the design and allow the use of higher resistance values, the JV team performed two full-scale, bidirectional (Osterberg Cell) static load test in two of the rock formations encountered along the alignment. This paper presents design details on the back-calculated side and base resistance values, a discussion on the displacement incompatibility of skin and end resistance. Equivalent load-settlement curve developed based on the load tests is presented to illustrate the overall shaft capacity within a displacement-based design framework.
RÉSUMÉ: En 2018, la Caisse de dépôt et placemenmilliards dollars, pour un réseau de 67 km avec plus de 25 km qui seront construits sur des structures surélevées réalisé deux essais de chargement statique bidirectionnels (Osterberg Cell) dans deux types de roches rencontrées le long du tracé. Cet article présente les détails de conception sur les valeurs de résistance latérale et de résistance en pointe calculées à partir des résultats des essais, ainsi qu'une discussion sur l'incompatibilité des déplacements mobilisé aux frottements le long du fut et la résistance en pointe. Une courbe charge-chargement est présentée pour illustrer la capacité du caisson basé sur les déplacements dans un cadre de conception.
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R. Diab; L. D’Amours; D. Zirmi; J. Habib (2019) Load testing of large diameter single drilled shaft foundations for the REM project in Montreal in GEO2019. Ottawa, Ontario: Canadian Geotechnical Society.
@article{Geo2019Paper383,
author = R. Diab; L. D’Amours; D. Zirmi; J. Habib,
title = Load testing of large diameter single drilled shaft foundations for the REM project in Montreal,
year = 2019
}
title = Load testing of large diameter single drilled shaft foundations for the REM project in Montreal,
year = 2019
}