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Construction method of total-prefabricated steel-concrete composite structure box girder

A combined structure and construction method technology, applied in the direction of erecting/assembling bridges, bridges, bridge construction, etc., can solve the problems of large overall size, poor overall mechanical performance, and heavy welding workload of assembled steel-concrete composite structure box girders , to achieve the effects of shortening the on-site construction period, improving construction accuracy, and reducing the amount of welding

Active Publication Date: 2017-06-30
HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD +1
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Problems solved by technology

[0003] The invention provides a construction method for a fully assembled steel-concrete composite structure box girder, which aims to solve the problems of large overall size, difficult hoisting, heavy welding workload, and poor overall mechanical performance of the assembled steel-concrete composite structure box girder.

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  • Construction method of total-prefabricated steel-concrete composite structure box girder
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  • Construction method of total-prefabricated steel-concrete composite structure box girder

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Embodiment Construction

[0020] The construction method of the fully assembled steel-concrete composite structure box girder of the present invention is specifically as follows:

[0021] The first step, prefabricated roof:

[0022] During construction, first spread the first corrugated steel plate 1.1 on the flat ground (see figure 1 a) Weld the upwardly extending shear connector 1.3 on the crest surface, and fill the trough with a steel template or an air bag consistent with the shape of the trough as the inner membrane 1.5 (see figure 1 b), and then bind the steel skeleton 1.6 of the reinforced concrete slab 1.2 on the top of the first corrugated steel plate 1.1 according to the specification requirements (see figure 1 c), final pouring of concrete (see figure 1 d), forming a composite bridge deck.

[0023] The second step, prefabricated base plate:

[0024] During construction, first reserve high-strength bolt holes at the corresponding positions of the straight steel plate 2.1 and the second c...

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Abstract

The invention discloses a construction method of a total-prefabricated steel-concrete composite structure box girder. The method comprises the following steps: firstly prefabricating a roof, welding an upward extended shearing force connecting piece on a wave crest surface of a first corrugated steel sheet, filling a steel template or an airbag consistent with a wave trough shape in the wave trough as an inner membrane, and then binding a reinforcement cage of a reinforced concrete plate on the top of the first corrugated steel sheet, and finally depositing the concrete; secondly, prefabricating a bottom plate, placing the second corrugated steel sheet on a straight steel sheet in an alignment way, and connecting through a high-strength bolt; omitting the step of placing and connecting the second corrugated steel sheet when the bottom only adopts the straight steel sheet if the box girder size is small; and then prefabricating a corrugated steel web fixedly connected with the roof and the bottom plate; machining the end part of the web into a I-shaped structure connecting piece, or respectively welding outward extended connecting piece on the first corrugated steel sheet and a second corrugated steel sheet / straight steel sheet; and finally assembling in site. By use of the construction method disclosed by the invention, the inconsistent deformation problem between the steel structure and the concrete structure is effectively solved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a construction method of a fully assembled steel-concrete composite structure box girder. Background technique [0002] In the field of bridge engineering, since the steel-concrete composite structure box girder has the advantages of both steel structure and concrete structure, it can not only effectively reduce the structural weight, but also improve the spanning capacity of the bridge, so it has significant economic and social benefits, and has broad application prospects. . However, the existing prefabricated steel-concrete composite structure box girders are only used on oceans or navigable rivers. Generally, the method of integral prefabrication and full welding of steel girders is used for construction, which has the advantage of fast construction on site. However, due to the large overall size , heavy weight, high requirements for hoisting equipment, large weld...

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Application Information

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IPC IPC(8): E01D21/00E01D2/04
CPCE01D2/04E01D21/00
Inventor 汤意李斐然乔倩妃李国普莫杰
Owner HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
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