Case study of a deep excavation in Toronto

L.F. Cao, S.M. Peaker, S. Ahmad

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Slope Stability

ABSTRACT: This paper presents shoring supports for a deep excavation within soft to firm silty clay near a railway in Toronto. The shoring system which consisted of caisson/soldier pile walls with tiebacks was monitored during excavation. The tieback testing and field monitoring results were reviewed and discussed. Back-analysis using a finite element program was carried out to evaluate the shoring wall performance. Recommendations for the design of shoring walls in the similar soil conditions are provided.

RÉSUMÉ: Cet article présente les parois délocalization pour une excavation profonde dans la argile limoneux doux au solide à proximité d'un chemin de fer à Toronto. Le système d'étaiement avec les murs embrasses de caissons/soldier ont été surveillés pendant l'excavation. Les résultats des embrasses essais et les surveillances de terrain ont été examinés et discutés. Rétro-analyse avec d'un programme d'éléments finis a été utilisé pour évaluer la performance du mur étayage. Cet article va fournir des recommandations pour la conception des parois délocalisationdans les conditions de sol similaires.

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