Statistical Correlations between ultimate bearing capacity (q u) and SPT- N value for glacial tills
Kanagaratnam Balachandran, Laifa Cao
In the proceedings of: GeoCalgary 2022: 75th Canadian Geotechnical ConferenceSession: W10
ABSTRACT: This paper presents a statistical analysis of the correlation between the ultimate bearing capacity (q u) and standard penetration test blow count (SPT-N) for glacial tills in the city of Toronto. The (q u) values were derived from conventional Terzaghi's bearing capacity equations. This study is based on the results of a comprehensive geotechnical investigation for the Eglinton Crosstown Light Rail Transit (LRT) project in Toronto. This study focused primarily on the statistical correlations between (q u) and SPT-N value for glacial tills with different textures, such as silty clay, silty clay till and clayey silt, clayey silt till and sandy silt, sandy silt till and silty sand, silty sand till. In this paper, the correlation equations between SPT - (N) 60 values and (q u) are suggested for glacial tills. Additionally, the bearing capacity derived from Terzaghi's bearing capacity equation compared with capacity derived from Menard bearing capacity equation from pressuremeter test (PMT) and suggested Menard bearing capacity factor for Toronto glacial till.
RÉSUMÉ: Cet article presente une analyse statistique de la correlation entre la capacite portante ultime (q u) et le nombre de
coups d'essai de penetration standard (SPT-N) pour les tills glaciaires de la ville de Toronto. Les valeurs (q u) ont ete
derivees des equations de capacite portante conventionnelles de Terzaghi. Cette etude est basee sur les resultats
d'une enquete geotechnique approfondie pour le projet Eglinton Crosstown Light Rail Transit (LRT) a Toronto. Cette
etude s'est concentree principalement sur les correlations statistiques entre (q u) et la valeur SPT-N pour les tills
glaciaires de differentes textures, comme l'argile limoneuse, le till argileux limoneux et le limon argileux, le till
limoneux argileux et le limon sableux, le till limoneux sableux et le sable limoneux, till de sable limoneux. Dans cet
article, les equations de correlation entre les valeurs SPT - (N) 60 et (q u) sont suggerees pour les tills glaciaires. De
plus, la capacite portante derivee de l'equation de capacite portante de Terzaghi par rapport a la capacite derivee de
l'equation de capacite portante de Menard a partir d'un test pressiometrique (PMT) et du facteur de capacite portante
suggere de Menard pour le till glaciaire de Toronto.
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Cite this article:
Balachandran, Kanagaratnam, Cao, Laifa (2022) Statistical Correlations between ultimate bearing capacity (q u) and SPT- N value for glacial tills in GEO2022. Ottawa, Ontario: Canadian Geotechnical Society.
@article{Balachandran_GEO2022_50,
author = Kanagaratnam Balachandran, Laifa Cao,
title = Statistical Correlations between ultimate bearing capacity (q u) and SPT- N value for glacial tills ,
year = 2022
}
title = Statistical Correlations between ultimate bearing capacity (q u) and SPT- N value for glacial tills ,
year = 2022
}