Walking type multipoint pushing construction method and walking type multipoint pushing construction system for steel box girder

A technology of jacking construction and steel box girders, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., which can solve problems such as the complex structure of temporary pier pier tops, and achieve the effect of ensuring safety
CN102587291BActive Publication Date: 2014-11-05THE FIRST ENG OF CCCC FOURTH HARBOR ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE FIRST ENG OF CCCC FOURTH HARBOR ENG
Publication Date
2014-11-05

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Abstract

The invention discloses a walking type multipoint pushing construction method for a steel box girder, which is an improved optimized scheme for improving the disadvantages of a pulling type pushing method. The optimized scheme comprises the steps of installing pushing devices at assembly platforms, temporary mounds, main mounds and other points, firstly jacking the steel box girder with a vertical jack to separate the steel box girder from a girder laying frame, then pushing the steel box girder for a stroke in the longitudinal direction by a pushing jack, lowering the steel box girder to the girder laying frame, retracting the pushing jack for a next stroke of pushing, and keeping the circulation of the work until the installation of the steel box girder is finished. The pushing construction method for the steel box girder provided by the invention adopts a multipoint walking type pushing system, which not only can avoid disadvantages in the process in prior arts, but also has the advantages that the horizontal force at the mound top is greatly reduced; the structure of the temporary mound is simplified; the damage to the steel box girder is small; the construction cost is low and the like.
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Description

technical field

[0001] The invention relates to the technical field of steel box girder jacking construction technology applicable to large bridges related to highway and railway industries, and in particular relates to the application of a multi-point walking jacking system. Background technique

[0002] Drag-type jacking is a conventional process for steel box girder jacking construction, that is, slideway beams are set on the assembly platform, temporary piers, and lower beams of main piers, and the steel box girder adopts continuous action of steel strands passing through the front on the slideway beams The jack pulls and slides. Every time a section is lifted and welded, a section is dragged, and the cycle works, and the steel box girder is gradually dragged to the opposite bank until the installation of the steel box girder is completed.

[0003] This scheme is widely used in domestic jacking construction and its technology is mature. Its main disadvantages are summar...

Claims

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