Slotted mandrel for lateral displacement pier and method of use

E - Fixed Constructions – 02 – D

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E02D 5/66 (2006.01) E02D 5/34 (2006.01) E02D 13/04 (2006.01)

Patent

CA 2608209

A slotted mandrel is used in displacement pier construction. Longitudinal slots are formed in the sides of the hollow mandrel which allow for the introduction of aggregate efficiently into the mandrel from a hopper through which the mandrel passes while being driven into the ground. Water may also be employed with the aggregate. Once in the ground the mandrel is raised to release the aggregate (and water if present) into the formed hole in lifts and a mandrel head then compacts the aggregate in the hole. This apparatus and method obviates the need for complicated and expensive hoppers that are raised with the mandrel or the use of expensive aggregate delivery systems.

L'invention se rapport à un mandrin à fentes et à son utilisation pour la construction de pieux refoulés. Ce mandrin creux comprend des fentes latérales permettant d'introduire facilement l'agrégat dans la mandrin à partir d'une trémie à travers laquelle le mandrin passe lorsqu'il est enfoncé dans le sol. Il permet également d'utiliser de l'agrégat avec de l'eau. Une fois enfoncé dans le sol, le mandrin est levée pour libérer l'agrégat (et l'eau, le cas échéant) dans le trou formé, par élévations, puis une tête de mandrin tasse l'agrégat dans le trou. Ce dispositif et ce procédé rendent superflus les trémies compliquées et coûteuses qui sont levée avec le mandrin, ou l'utilisation de systèmes coûteux de distribution d'agrégat.

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