Method for high beam falling construction based on push method

A technology of jack-up method and beam-dropping, which is applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as permanent pier damage, avoid damage, shorten the construction period of falling beams, and save materials.

Active Publication Date: 2018-11-02
ROAD & BRIDGE INT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing beam drop method, and provide a beam drop method using the existing jacking bracket as the beam drop bracket, so as to improve construction safety, shorten the construction period, save costs, and avoid beam drop construction Damage to permanent pier

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  • Method for high beam falling construction based on push method
  • Method for high beam falling construction based on push method
  • Method for high beam falling construction based on push method

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Embodiment Construction

[0026] Such as figure 1 As shown, after the steel box girder 1 is pushed into place by the jacking method construction, it will be dropped to the permanent pier 3. Now the steel box girder is supported by the push bracket 2 during the push construction. Such as figure 2 , image 3 , Figure 4 As shown, two layers are arranged on the upper part of the push bracket 2, and each layer has two beams arranged in the direction of the bridge, wherein the upper beam includes the first upper beam 21 and the second upper beam 22, and the lower beam correspondingly includes the first lower beam 23 and The second lower beam 24 . The upper beam is equipped with jacking equipment, including slideway 4, traction jack, and correction device, etc., the bottom surface of the upper beam is flush with the top surface of the adjacent span prefabricated box girder, the lower beam is 1m lower than the support elevation, and the first lower beam 23 and the first upper beam 21, and between the se...

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Abstract

The invention provides a method for high beam falling construction based on a pushing method. The beam falling construction is performed by directly utilizing a pushing bracket. The method comprises the following steps: firstly jacking a steel box girder by utilizing two jacks from a bridge to a first bracket, sequentially pulling out a slideway on a top platform of the bracket and a cross beam, matching with the two jacks by utilizing four steel pipe upright posts of the bracket, reducing the elevations of the steel pipe upright posts by alternately adopting modes of supporting by the steel pipe upright posts and the jacks and finally falling the steel box girder to a designed position. In the beam falling construction, a beam falling bracket or a beam falling support pad is not requiredto be re-erected, and a permanent pier is not utilized, so that the damage caused to the permanent pier in the falling process is prevented.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and relates to the installation of steel box girders during bridge construction, in particular to a construction method in which the steel box girders are pushed into place by a jacking method, and then the box girders are dropped from a high position to a designed position by a bracket. Background technique [0002] According to incomplete statistics, since the jacking method was first applied to bridge construction, there have been more than 1,000 bridges constructed using the jacking method in the world, including hundreds of them in China. After the construction of the jacking method is completed, the beam segment must be accurately dropped to the design position. figure 1 Shown is the state of the steel box girder after the jacking is completed. The steel box girder 1 is now supported on the jacking bracket 2. The next step is to drop the steel box girder 1 onto the permanent pier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 阎王虎孙国良侯兆隆朱庆庆马晓兵吴文斌康超邱伟超朱丹丹
Owner ROAD & BRIDGE INT
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