Use of tiebacks in Southern Ontario

L.F. Cao, S.M. Peaker

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Retaining Walls

ABSTRACT: The application of tiebacks at six sites in Southern Ontario is presented in this paper. The testing methods for tiebacks used and tieback performance at these sites are discussed in this paper. The tieback load transfer (bond strength) and bond capacity (skin friction) obtained from tieback performance tests are related to the soil conditions. Typical values of tieback load transfer and bond capacity in various soils are recommended. Correlations between load transfer/bond capacity and SPT N-value are proposed.

RÉSUMÉ: L'application des tiebacks à six loctations au Ontario est présentée dans cet article. Les méthodes d'essai pour des tiebacks utilisés et la performance des tieback dans ces locations sont discutées dans cet article. Le transfert de charge du tieback (force en esclavage) et la capacité de lien (frottement de peau) obtenue des essais de performance de tieback sont liés aux conditions dans le sol. Les valeurs typiques de la transfèrt de charge du tieback et la capacité de lien dans divers sols sont recommandées. On propose des corrélations entre le transfert de charge/capacité en esclavage et la valeur-N de SPT.

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