Screw piles and method of manufacture

E - Fixed Constructions – 02 – D

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E02D 5/28 (2006.01) B21H 3/00 (2006.01) E02D 5/56 (2006.01)

Patent

CA 2213871

The invention provides a helical screw pile for use as a ground foundation. The screw pile includes a central shaft and a helix around the central shaft wherein the helix inner surface is parallel to the central shaft outer surface and spaced equidistantly around the central shaft. Furthermore, in order to maximize the strength of the screw pile for a given helix diameter, a line extending outwardly from the central shaft from thelongitudinal axis and along the helix upper surface is perpendicular to the longitudinal axis. The helix design allows higher capacity loading compared to conventional driven piles.

L'invention a trait à un pieu à vis hélicoïdal servant d'élément de fondation s'enfonçant dans le sol. Le pieu est constitué d'une tige centrale et d'une hélice formée autour de la tige; la surface intérieure de l'hélice étant parallèle à la surface extérieure de la tige centrale et étant espacée de façon équidistante autour de la tige centrale. En outre, afin que le pieu à vis présente une force maximale pour un diamètre d'hélice donné, une ligne se prolongeant vers l'extérieur de la tige centrale à partir de l'axe longitudinal et le long de la surface supérieure de l'hélice est réalisée perpendiculairement à l'axe longitudinal. La conception en hélice confère au pieu à vis une capacité de charge supérieure aux pieux existants qui s'enfoncent dans le sol.

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