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Construction method of block prefabricated twice prestressed corrugated steel web composite beam

A corrugated steel web and secondary prestressing technology, which is applied in bridges, bridge materials, bridge construction, etc., can solve problems such as transportation, hoisting, and post-maintenance, and is conducive to rapid erection, easy transportation, and hoisting. The effect of volume reduction

Active Publication Date: 2018-05-08
HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a construction method of block prefabricated secondary prestressed corrugated steel web composite girders, aiming at solving the problems of transportation, hoisting and post-maintenance when the existing corrugated steel web PC composite box girders are applied to large bridges aspects of the problem

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  • Construction method of block prefabricated twice prestressed corrugated steel web composite beam
  • Construction method of block prefabricated twice prestressed corrugated steel web composite beam
  • Construction method of block prefabricated twice prestressed corrugated steel web composite beam

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Embodiment Construction

[0037] The construction method of the sub-block prefabricated secondary prestressed corrugated steel web composite beam of the present invention mainly includes the following steps:

[0038] In the first step, according to the design requirements of the bridge, the prefabrication of the prefabricated concrete roof 1, the prefabricated concrete bottom slab 2 and the corrugated steel web 3 is carried out independently.figure 1 The I-beam element shown.

[0039] Specifically, prefabs such as figure 2 For the prefabricated concrete roof 1 shown, the roof reinforcement mesh with transverse connecting bars 1.1 and longitudinal connecting bars 1.2 is bound first, and then the pier top negative moment prestressed channel 1.3 and upper shear connector 1.4 are installed on the roof reinforcing mesh Then install the limit formwork and pour concrete; after the concrete reaches the design strength, remove the limit formwork.

[0040] prefabricated as image 3 When the shown prefabricate...

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Abstract

The invention discloses a method for constructing a block prefabricated secondary prestress corrugated steel web combined box girder. The combined box girder comprises a combined girder body formed by transversely and longitudinally connecting multiple H-shaped girder body units, and each H-shaped girder body unit is formed by splicing a prefabricated concrete top plate, a prefabricated concrete bottom plate and a corrugated steel web which are all independently prefabricated. An upper shearing force connecting piece, a top plate transverse connection steel rib, a top plate longitudinal connection steel rib and a top plate prestress channel are preburied in each prefabricated concrete top plate. A lower shearing force connecting piece, a bottom plate transverse connection steel rib, a bottom plate longitudinal connection steel rib, a bottom plate primary prestress channel and a bottom plate secondary prestress channel are preburied in each prefabricated concrete bottom plate. Bolt holes used for connecting the upper and lower shearing force connecting pieces are reserved in the peripheries of the corrugated steel webs. The girder body is erected in a block prefabricated splicing structure mode, the sizes and the weights of the parts are correspondingly small, transport is stable, hoisting is safe, and construction is benefited.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for block prefabricated secondary prestressed corrugated steel web composite girders suitable for large bridges. Background technique [0002] Traditional prefabricated box girder webs are mostly made of concrete, which is heavy and easy to crack. Therefore, concrete box girders are only suitable for highway bridges with small spans (less than 40m). Since ACSI Association introduced PC composite box girder with corrugated steel web in 1988, PC composite girder with corrugated steel web, as an economical, efficient, and easy-to-construct new bridge form, has been widely recognized by bridge workers and has been expanded. It is used in the actual engineering of large and medium-sized bridges (more than 50m span). [0003] The existing PC composite box girders with corrugated steel webs mostly adopt the following two forms for construction: [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
CPCE01D21/00E01D2101/285
Inventor 汤意李斐然张旭慧楚斌梁柯峰郭晓光
Owner HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
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