Pile cap effects on lateral response of pile groups and piled rafts

H. Chow, J.C. Small, H.G. Poulos

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: M1-C

ABSTRACT: Pile groups subjected to lateral loadings have in the past been treated as a group of piles that resist lateral loading due to the lateral pressure acting on the pile shaft. The effect of the cap or raft in resisting the lateral loading has often been neglected although cohesive or friction forces may be acting across the base of the cap. In this paper therefore, the effect of the forces acting on the base of the cap is considered in the analysis. The performance of pile groups is assessed with the cap resistance acting, and without the cap resistance acting so as to allow some quantification of the effect of not considering the cap resistance.

RÉSUMÉ: Dans le passé, on considérait que les groupes de pieux soumis aux chargements latéraux ne résistaient que par l'action de la pression latérale s'exerçant sur le fût. Le rôle joué par le chapiteau ou le radier dans la résistance au chargement latéral a souvent été négligé bien que des forces cohésives ou de frottement à la base du radier puissent entrer en jeu. Dans cet article, l'effet de ces forces est pris en compte dans l'analyse. Le comportement des groupes de pieux est étudié avec, puis sans la résistance du radier afin d'en quantifier l'effet. 1 INTRODUCTION

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