Instrumented Static Pile Load Testing of Cast-in-place Concrete Piles in Edmonton

Evan Sau Yue Ma, Michan Condra, Andrew Cushing, Michael Lewis

In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC

Session: Soil Mechanics and Foundations (Deep Foundations I)

ABSTRACT: Cast-in-place concrete piles were used to support transportation structure foundations for the Valley Line Light Rail Transit project in Edmonton. A series of instrumented conventional static, Osterberg Load Cell (O-Cell) sacrificial pile load tests, and Statnamic (rapid) proof load tests were used to confirm shaft friction and end bearing parameters used in design at three sites along the alignment. This paper evaluates the pile capacities derived from common empirical analysis ( and -methods) from laboratory and field testing with the results of the sacrificial load tests. Further, the mobilized unit skin friction and end bearing values are compared with established empirical skin-friction settlement (t-z), and end bearing-toe settlement (q-w) curves respectively. Proof load testing is assessed against the static top load and equivalent top load from O-Cell testing plotted with normalized settlement/diameter ratios.

RÉSUMÉ: Les fondations de certaines structures de transport du projet de train léger sur rail Valley Line à Edmonton consistent de pieux forés. Une série de différents types d'essais de charge sur pieux sacrificiels a été complétée, dont des essais statiques conventionnels de charge sacrificielle statique, Osterberg Load Cell (O-Cell), et des tests de charge étalon (rapide) statnamiques. mlbCes essais ont servi à confirmer les paramètres de résistance de pointe et de frottement latéral utilisés dans la conception sur trois sites le long de l'alignement. Cet article évalue les capacités portantes dérivées d'analyses empiriques communes essais de charge sacrificiels. En outre, les valeurs mobilisées de frottement latéral et de résistance de pointe sont comparées aux courbes empiriques établies de charge-déplacement du fût (t-z) et de la pointe (q-w) respectivement. Les essais de charge sont évalués par rapport à la charge statique supérieure et à la charge supérieure équivalente des tests O-Cell tracés avec des rapports normalisés de tassement / diamètre.

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Cite this article:
Evan Sau Yue Ma; Michan Condra; Andrew Cushing; Michael Lewis (2018) Instrumented Static Pile Load Testing of Cast-in-place Concrete Piles in Edmonton in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2018Paper242,author = Evan Sau Yue Ma; Michan Condra; Andrew Cushing; Michael Lewis,title = Instrumented Static Pile Load Testing of Cast-in-place Concrete Piles in Edmonton ,year = 2018}