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Incremental launching construction method for large-span steel box girder spanning constructed road

A technology of jacking construction and steel box girders, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc. It can solve the problems of less construction materials, less vertical support, and inability to meet the requirements of jacking, and achieve convenient construction and demolition. Easy installation, safe and reliable construction process

Active Publication Date: 2016-05-11
THE NO 6 ENG CO LTD OF CHINA RAILWAY 20TH BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the oblique terrain and the impact of crossing busy highways, the pier column design of the steel box girder adopts the form of a single column and a beam without a cover. Pushing requirements, and there are few construction materials available for reference at home and abroad

Method used

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  • Incremental launching construction method for large-span steel box girder spanning constructed road
  • Incremental launching construction method for large-span steel box girder spanning constructed road
  • Incremental launching construction method for large-span steel box girder spanning constructed road

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Embodiment Construction

[0073] Such as figure 1 Shown is a long-span steel box girder jacking construction method that crosses an existing road. The steel box girder 1 to be pushed is a steel box girder that spans an existing road 2. The steel box girder 1 to be pushed passes through five permanent The buttresses are supported by multiple steel box girder segments spliced ​​from the rear to the front; for example figure 2 As shown, the five permanent piers are respectively the first piers 3, the second piers 4, the third piers 5, and the fourth piers 6 along the length direction of the pushed steel box girder 1 from the rear to the front. and the fifth pier 7, the five permanent piers are double column piers without cap; the first pier 3 and the second pier 4 are located on the left side of the existing road 2, and the fourth pier 6 and the fifth pier 7 are located on the right side of the existing road 2, and the third pier 5 is located in the middle of the existing road 2; It consists of two cyl...

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Abstract

The invention discloses an incremental launching construction method for a large-span steel box girder spanning a constructed road. An incremental launching steel box girder spans the constructed road, is supported by five permanent buttresses, and is formed by a plurality of steel box girder segments which are spliced back to front; the five permanent buttresses are all uncovered girder double-cylinder pillars; the uncovered girder double-cylinder pillars respectively consist of two cylindrical buttresses which are supported below the left side and the right side of the steel box girder; the incremental launching construction method for the incremental launching steel box girder comprises the following steps: I, splicing jig frames; II, constructing temporary buttresses and rigid brackets; III, splicing the steel box girder and mounting guide beams; IV, mounting an incremental launching device and a second longitudinal slideway beam; V, performing incremental launching. The method disclosed by the invention is simple in step, reasonable in design, simple and convenient to construct and good in use effect, and by constructing the rigid brackets on the outer sides of the buttresses and mounting a longitudinal slideway and a transverse deviation correcting device, the incremental launching construction of the large-span steel box girder can be easily, conveniently and rapidly completed.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to a construction method for pushing a large-span steel box girder spanning an existing road. Background technique [0002] With the expansion of the highway construction scale in our country, there are more and more three-dimensional crossing constructions in the highway construction process, and there are more and more constructions across busy expressways, and various bridge structures with large spans and large tonnages have emerged as the times require. The jacking construction of bridges is favored by bridge builders because of its simple construction method, safety and reliability, economical application, and little construction interference. [0003] Construction of the overpass bridge on the main line of the Paibang Interchange of Boshen Expressway. The main girder of the bridge is a continuous steel box girder of (35.1+2×50+35.1) m, crossing the Jihe Expressway...

Claims

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Application Information

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IPC IPC(8): E01D21/06
CPCE01D21/06
Inventor 徐海兵宋成年刘文军
Owner THE NO 6 ENG CO LTD OF CHINA RAILWAY 20TH BUREAU GRP
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