Bridge deck and steel girder second combination method for whole arch precasted steel-concrete composite continuous box girder

A secondary combination, bridge deck technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of high difficulty and high construction requirements

Inactive Publication Date: 2009-05-06
CHINA MAJOR BRIDGE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The combination of existing precast concrete slabs and steel beams adopts a one-time combi

Method used

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  • Bridge deck and steel girder second combination method for whole arch precasted steel-concrete composite continuous box girder
  • Bridge deck and steel girder second combination method for whole arch precasted steel-concrete composite continuous box girder
  • Bridge deck and steel girder second combination method for whole arch precasted steel-concrete composite continuous box girder

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Embodiment Construction

[0028] Steel-concrete composite structure continuous box girder prefabrication field prefabrication realizes the first combination and after floating erection, the pier top is simply supported and continuously completes the second combination construction description:

[0029] The span of the continuous box girder of the long-span steel-concrete composite structure of the Shanghai Yangtze River Tunnel Bridge is (85+5×105+90) m. figure 1 , 2 As shown, the cross-section of the composite girder bridge deck is formed by pouring longitudinal wet joint concrete on the top plate welded with shear studs 4 by a prefabricated middle plate 2 and two side plates 3 . Joint pouring connects each bridge deck into a whole. The composite beam is prefabricated by the whole beam field, and the world advanced construction technology of large-scale crane ship is transported and erected at sea. The composite beam is in the prefabrication field, and the steel beam assembly frame and the steel-concr...

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Abstract

The invention discloses a method for the secondary combination of a deck slab and a steel girder for an entire hole prefabricated steel-concrete combined continuous box girder, which comprises the following steps: firstly, performing the primary combination of the deck slab and the steel girder for the middle section of a composite girder in a precast field, wherein two ends of the composite girder are not combined with the deck slab; secondly, erecting the composite girder to the top of a bridge site pier through the transportation of a large floating crane, and finishing the concrete casting for a bottom plate of a dual-combination section between composite girder supporting point composite girders by a supporting point roof fall girder method after the composite girder is erected and simple beams are arranged continuously; and thirdly, performing the secondary combination of the deck slab and wet joint seam steel-concrete on the two ends of the composite girder to achieve the secondary combination of the deck slab and the steel girder. The method avoids limitations for the erection of the steel girder of the composite girder by adopting an incremental launching method to construct a large-span composite girder, reduces time-consuming, laborious and costly temporary rest piers to be constructed on a temporary support for segmental hoisting construction, and reduces the cumbersome segmental transportation of the steel girder.

Description

technical field [0001] The invention belongs to bridge construction technology, and in particular relates to a method for combining a steel-concrete composite continuous box girder bridge deck and a steel girder. Background technique [0002] In the construction of composite girder bridges, steel girders are usually erected first, and then the steel girders are used as supports and formwork for concrete bridge deck construction. [0003] On the basis of existing bridge construction, the erection of steel girders of composite girder bridges can be summarized into the following two methods: [0004] (1) Pushing method. It is a relatively simple construction method to connect the steel girders section by section at the bridge head and push them into place. For small-span (or even mid-span) multi-span continuous girder bridges, it can be used when it is inconvenient to set up temporary buttresses between spans due to traffic, river and other reasons. [0005] (2) Sectional ho...

Claims

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Application Information

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IPC IPC(8): E01D21/00
Inventor 秦顺全陈理平张君武朱志虎蒋稳齐黄旺明胡勇黄勇张树国梁辉
Owner CHINA MAJOR BRIDGE ENG
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