Centrifugal molding of prestressed piles
OwnerAmadeo Carraroinventor
Life of this patent
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Abstract
The method for forming prestressed centrifugal piles by: disposing a spiral within one of the two constituent half-shells of the mould for the pile to be formed, securing within this spiral a plurality of strands having at least one end emerging from a mould headpiece, pouring the concrete into said half-shell, joining the two half-shells together, inserting axial restraint elements for the strands through suitable apertures provided in the half-shells, tensioning the strands at those ends which emerge from the headpiece and, centrifuging the mould prepared in this manner.
Claims2
A method for centrifugally forming prestressed piles, comprising steps of
- providing a mould comprising two semicylindrical half-shells with ends bounded by respective headpieces having apertures therein, said half-shells further having lateral apertures therein,
- disposing a spiral within a first of the two half-shells of the mould for the pile to be formed,
- securing within said spiral a plurality of strands, each strand extending along an axis parallel to that of the mould, each having at least one end emerging from a mould headpiece, and at least some of said strands having one end thereof terminating within the mould, in the vicinity of respective ones of said lateral apertures,
- affixing a first block to each of those strands terminating within the mould, in proximity to a respective one of said lateral apertures,
- pouring concrete into said first half-shell,
- joining the two half-shells together, then
- inserting elements for axially restraining the blocks through said lateral apertures provided in the half-shells,
- tensioning the strands at those ends which emerge from the headpiece, and
- centrifuging the mould prepared in this manner.
Dependencies are inferred from the claim text.