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Simply supported prefabricated integrally-cast superposed bridge and construction method thereof

A construction method and technology of prefabricated beams, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of poor connection integrity of prefabricated bridges, slow manufacturing and installation speed, high formwork amortization cost, etc., to solve the problem of oblique section resistance Crack problem, formwork amortization cost is low, beam synergistic mechanical performance is good

Active Publication Date: 2012-12-05
杨众 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Simply supported prefabricated integrally-cast superposed bridge and construction method thereof
  • Simply supported prefabricated integrally-cast superposed bridge and construction method thereof
  • Simply supported prefabricated integrally-cast superposed bridge and construction method thereof

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Embodiment Construction

[0040] see Figure 1 to Figure 10 , an embodiment of a simple-supported prefabricated monolithic composite bridge provided in the present invention includes an inverted T-shaped prestressed prefabricated beam part 1, a cast-in-place part 2 and a diaphragm 3, and the cast-in-place part 2 includes The cast-in-place slab 21 and the superimposed part 22 of the upper part of the beam, the lower flange 11 of the inverted T-shaped prestressed prefabricated beam 1 and the upper part of the web 12 are all embedded with pre-tensioned prestressed steel strands 4, and the transverse diaphragm 3 It is a prefabricated slab, and the transverse diaphragm 3 is arranged between the webs 12 of adjacent prefabricated beams at a certain distance along the longitudinal direction, and is located above the flange 11 of the prefabricated beam 1 . The present invention forms a superimposed bridge through the prefabricated beam 1, the prefabricated diaphragm 3 and the cast-in-place part 2, so that the b...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D1/00E01D21/00
Inventor 杨峰
Owner 杨众
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