Method and device for erecting building structures such as bridges, using pre-fabricated concrete beams
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United States of America Patent
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Dec 23, 1986
Issued Date -
N/A
app pub date -
Nov 1, 1984
filing date -
Jun 19, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Proposed is a method for the erection of structures, such as bridges, that display pre-fabricated concrete beams, according to which the individual pre-fabricated beams are produced, on the spot, on a feed rigging within the corresponding work area of the structure, in a heated and laterally tiltable form. After removal from the form, the thusly produced pre-fabricated beams are transferred sidewardly into their final position by means of gantry cranes. During concretizing of the individual pre-fabricated beams, flexure of the feed rigging carrying the form is equalized in continuous fashion, in correspondence with the progressing, concretizing process, by transfer pumping of ballast liquid. Correspondingly with progression of construction, the feed rigging displaying a freely suspended cantilever is transferred in progressive fashion onto support girders of the structure that have been prepared beforehand, just like the gantry cranes, which can be pretransported from the support girders supporting it to the next support girders. Also capable of being equalized are different inclinations of the support girders, such as curvatures in the ground plane of the structure, for example the access to bridges.
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