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US 4,064,669 AGranted
Stationary supporting structure
OwnerKjeld Vikinventor
Life of this patent
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OwnerKjeld Vikinventor
Estimating the term…
A stationary supporting structure comprising one or more columns each assembled from a prefabricated concrete foundation element having a vertical steel tube linked to its upper surface to serve as a guide for annular prefabricated concrete elements which are successively threaded onto the tube. Initial skew due to an inclined ground at the erection site and tolerances in the length of any tie rods between the columns may be compensated for due to the fact that the prefabricated elements, although mating, may be displaced relatively to each other during erection of the structure, the mating surfaces being minor spherical surfaces, whereby the axis of each element can be adjusted relative to the axis of the next lower or upper element. After assembly of the prefabricated elements, the interior of the guide tube for the annular elements and the space between the tube and the walls of the central opening of the annular elements have been filled with concrete so as to connect the elements to a rigid coherent column.
Stationary supporting structure comprising at least one column defined by a plurality of annular prefabricated superjacent concrete column elements and vertically central steel tube, said tube having a diameter substantially smaller than the inner diameter of the annular prefabricated column elements to provide a partial linear contact between the tube and the walls of the central aperture of said concrete column elements when said column elements are mounted thereon, said walls and the tube being otherwise spaced from each other, a prefabricated concrete foundation element, said tube being linked to the upper surface of the foundation element, the upper surface of said foundation element and the adjacent ends of each column element having mating minor spherical bearing surfaces allowing disalignment of the axis of said column during erection, said column elements and the tube being locked together to provide a rigid structure by concrete filling the space between the tube and the walls of the central apertures of said column elements.
In a method for the construction of a stationary supporting structure having at least one column, comprising the following steps:
A column element for use in the construction of a stationary supporting structure, said column element being of concrete and having a throughgoing aperture, end faces of said column element between which the aperture extends having minor spherical surfaces, one face being concave and the other convex, with said minor spherical surfaces adapted to serve as a bearing surface for an adjacent positioned column element.
A prefabricated structural element for use in the production of a stationary supporting structure, comprising a concrete foundation element having a lower surface for contact with the ground and an upper minor spherical bearing surface, and a steel tube the lower end of which is linked to said foundation element in a position approximately centrally of the bearing surface.
Dependencies are inferred from the claim text.