A simple-supported prefabricated monolithic composite bridge and its construction method

Abstract

The invention discloses a simply supported prefabricated integrally-cast superposed bridge. The prefabricated integrally-cast superposed bridge comprises inverted T-shaped prestressed prefabricated beam parts, cast-in-situ parts and horizontal baffles, and is characterized in that each cast-in-situ part comprises a cast-in-situ plate and a cast-in-situ superposed part at the upper part of the beam part; pretensioned prestressed steel strands are embedded in the upper parts of a web plate and a lower flange of each inverted T-shaped prestressed prefabricated beam part; the horizontal baffles adopt prefabricated plates, and are longitudinally arranged at intervals between the web plates of the adjacent prefabricated beam parts at the two ends of each beam part and positioned above the flanges of the prefabricated beam parts; and the inverted T-shaped prestressed prefabricated beam parts adopt manufacturing moulds commonly used with buildings, and mould plates are good in commonality, convenient to mount and dismount, high in working efficiency and low in amortized cost.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a prefabricated integral bridge. Background technique [0002] Traffic and municipal bridges with small and medium spans (12-24 meters) usually use prestressed box girder or girder bridges, and post-tensioning prestressed construction is mostly used. Or the slab is heavy, large-scale equipment is required for transportation and installation, and the manufacturing and installation speed is slow. The formwork of different specifications is used for the production of beams. It is necessary to grout in the steel strand casing. If the grouting is not dense, the prestressed steel bars will be corroded and the durability of the bridge will be poor, resulting in safety risks. The above-mentioned bridges use a large amount of steel and are expensive. The I-shaped composite bridge has not been reported yet. Contents of the invention [0003] The technical problem to be solved by the ...

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Problems solved by technology

[0002] Traffic and municipal bridges with small and medium spans (12-24 meters) usually use prestressed box girder or girder bridges, and post-tensioning prestressed construction is mostly used. Or the slab is heavy, large-scale equipment is required for transportation and installation, and the manufacturing and installation speed is slow. The formwork of different specifications is used for the production of beams. It is necessary to grout in the steel strand casing. If the grouting is not dense, the prestressed steel bars will be corroded and the durability of the bridge will be poor, resulting in safety risks. The above-mentioned bridges use a large amount of steel and are expensive. I-shaped composite bridge has not been reported yet

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