Support beam falling method for surfaces of middle and small bridges and special support device

A technology of falling beams and supporting piers, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as the difficulty of falling and supporting bridges, and achieve the effect of reducing construction difficulty, reducing the risk of falling beams, and reducing the risks of falling beams.

Active Publication Date: 2014-08-13
中铁宝桥(宝鸡)路桥建设有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to propose a bridge deck support method to solve the problem of falling support of existing bridges

Method used

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  • Support beam falling method for surfaces of middle and small bridges and special support device
  • Support beam falling method for surfaces of middle and small bridges and special support device

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Embodiment Construction

[0016] After the steel beam is pushed in place, remove the mechanical structure for pushing; install auxiliary support piers, jacking support piers and oil cylinders. Weld 4 sets of steel support frames with a cantilevered structure at one end on the top surface. The support frames should be designed according to the weight of the steel beams, so that they will not deform when the jack is lifted up, and the welds will not crack. Set a jack and steel pads at the cantilevered end of the steel support frame to form a jacking support pier. A set of auxiliary support piers is set at each pad stone position, and a steel plate stack with a thickness of 120mm is set at the contact between the pier and the pad stone. Each steel plate has a thickness of 12mm and a size of 400mm×400mm. When the height of the jacking support pier and the auxiliary support pier is relatively large, it is necessary to weld oblique H-shaped steel supports to improve the stability of the support pier. The he...

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Abstract

The invention aims to provide a bridge surface support mode, and aims to solve the difficult problem of the falling and supporting of the existing bridge. A support beam falling method for the surfaces of middle and small bridges comprises the steps that assistant support piers and jacking support piers are separately arranged; the assistant support piers are positioned at the lower parts of two ends of a steel girder; the tops of the assistant support piers are connected with the lower part of the steel girder; the jacking support beams are positioned at two side parts of the bridge and are connected to the top surface of the steel girder by jacking supports; the falling of the position of the steel girder is realized in a mode that the steel girder is alternatively supported by the assistant support piers and the jacking support piers. A special support device comprises the assistant support piers and the jacking support piers, wherein the assistant support piers are positioned at the lower parts of two ends of the steel girder and the tops of the assistant support piers are connected to the lower part of the steel girder; the jacking support piers are positioned at two side parts of the steel girder and are connected to the top surface of the steel girder by the jacking support. The assistant support piers and the jacking piers are separately arranged, so the problems of low construction efficiency and narrow work surface as all support piers are arranged at the position of bridge pier cover beams are solved, the beam falling risk is reduced and the economic benefits are improved.

Description

technical field [0001] The invention belongs to steel bridge installation engineering, and relates to the installation and construction of small and medium-sized bridges spanning existing lines and crossing rivers. Background technique [0002] With the rapid development of China's economy and the improvement of steel production capacity, urban road construction has entered a stage of vigorous development. Overpass projects, cross-existing lines, and cross-river construction can be seen everywhere, and most of the cross-line parts are large-span and light-weight steel beams is the preferred structure. In the construction process, in order to reduce the impact on the existing traffic lines or not interrupt the existing traffic lines, various forms of pushing methods are used to complete the installation and erection of steel beams. There are many ways to install steel beams, but no matter what In the way of jacking, the drop beam is the most critical or crucial part in the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 刘召宁张秉钧王建荣
Owner 中铁宝桥(宝鸡)路桥建设有限公司
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