Continuous incrementally erecting viaduct construction system

E - Fixed Constructions – 01 – D

Patent

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E01D 21/06 (2006.01)

Patent

CA 2205997

A precast segmental viaduct construction system, comprises an elongated erection and assembly vehicle (22) for spanning between at least two viaduct piers (24) and for moving between successive piers, said vehicle (22) having a top deck, an elongated central longitudinal beam (44) having a down facing elongated planar bottom support surface, a pair of elongated trusses (46, 48) secured to and inclined outward from said beam (44), and a pair of elongated longitudinal planar top support surfaces (32, 34) extending along opposite side edges of said top deck, a plurality of jacks (78, 80, 86, 88, 90, 92) spaced along said vehicle (22) for cooperatively engaging piers (24) on which said vehicle is supported for positioning said vehicle relative to piers on which it is supported, and a support assembly for supporting said vehicle on a pier, said support assembly having jacks (78, 80) for selectively elevating and lowering the vehicle.

Un système de construction pour viaduc à segments préfabriqués comporte une structure mobile d'érection et d'assemblage (22) de forme allongée, destinée à enjamber au moins deux piliers (24) de viaduc ainsi qu'à se déplacer entre des piliers successifs. Cette structure (22) est constituée d'une plate-forme supérieure, d'une poutre centrale longitudinale (44) de forme allongée munie d'une surface inférieure de soutien, plane et de forme allongée tournée vers le bas, d'une paire de treillis (46, 48) de forme allongée fixés à ladite poutre (44) et à partir de laquelle ils s'inclinent vers l'extérieur, ainsi que d'une paire de surfaces planes de soutien (32, 34) supérieures longitudinales, de forme allongée, s'étendant le long des deux bords opposés de la plate-forme supérieure. Plusieurs vérins (78, 80, 86, 88, 90, 92), répartis le long de ladite structure (22), prennent appui sur les piliers (24) soutenant cette dernière afin de la positionner par rapport à ceux-ci tandis qu'un ensemble de soutènement, destiné à soutenir la structure sur un pilier, est pourvu de vérins (78, 80) qui l'élèvent et l'abaissent sélectivement.

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