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Construction method of block-prefabricated pretensioned prestressed corrugated steel web composite box girder

A technology of corrugated steel webs and construction methods, which is applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as transportation, hoisting, and later maintenance, and is conducive to rapid erection, avoiding poor stability, and eliminating stress Delivers choppy effects

Active Publication Date: 2018-07-24
HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a block-prefabricated pre-tensioned prestressed corrugated steel web composite box girder construction method, the purpose of which is to solve the problems of transportation, hoisting and post-processing when the existing corrugated steel web PC composite box girder is applied to large bridges. maintenance issues

Method used

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  • Construction method of block-prefabricated pretensioned prestressed corrugated steel web composite box girder
  • Construction method of block-prefabricated pretensioned prestressed corrugated steel web composite box girder
  • Construction method of block-prefabricated pretensioned prestressed corrugated steel web composite box girder

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Embodiment Construction

[0033] The construction method of the block prefabricated pretensioned prestressed corrugated steel web composite box girder of the present invention mainly comprises the following steps:

[0034] The first step is to prefabricate the I-shaped beam unit separately (such as figure 1 ,2 As shown), the precast concrete top slab 1, the prestressed concrete bottom slab 2 and the corrugated steel web 3.

[0035] Specifically, prefabs such as image 3 For the prefabricated concrete roof 1 shown in the figure, the roof reinforcement mesh is bound first, the position and quantity of the transverse connecting bars 1.1 and the longitudinal connecting bars 1.2 are determined according to the design requirements, and then the pier top negative moment prestressed channel 1.3 and the upper shear connector The shear studs of 1.4 are installed in the steel mesh of the roof, and then the limit formwork is installed, and the concrete is poured; after the concrete reaches the design strength, th...

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Abstract

The invention discloses a method for constructing a block prefabricated pre-tensioning prestressed corrugated steel web combined box girder. The combined box girder comprises a combined girder body formed by longitudinally connecting multiple H-shaped girder body units, and each H-shaped girder body unit is formed by splicing prefabricated concrete top plates, a prestress concrete bottom plate and a corrugated steel web which are all independently prefabricated. Each H-shaped girder body unit comprises one prestress concrete bottom plate and at least two prefabricated concrete top plates. 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. Each prestress concrete bottom plate is of a flat plate structure, and a pre-tensioning prestressed steel cable, a lower shearing force connecting piece and a bottom plate longitudinal connection steel rib are preburied in each prestress concrete bottom plate. Bolt holes 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 a block-prefabricated pretensioned prestressed corrugated steel web composite box girder 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). Corrugated steel web PC composite box girder bridge is a new type of bridge structure that appeared in the 1980s. The corrugated steel web used in it has excellent stability and the characteristics of not resisting axial force, so that the prestress can be effectively It is loaded on the prefabricated concrete roof and prestressed concrete floor; in addition, the corrugated steel web PC composite box girder bridge is easy to construct and can effectively shorten the construction period, so it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D2/04
CPCE01D2/04E01D21/00
Inventor 汤意李斐然张旭慧康健桑建设郭晓光
Owner HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
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