| 摘要 |
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.
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