Construction method for synchronously jacking whole bridge to replace support

A technology of synchronous jacking and construction methods, applied to bridges, bridge parts, bridge construction, etc., to achieve the effects of reducing costs, ensuring safety, and operating well

Inactive Publication Date: 2020-12-29
POWERCHINA MUNICIPAL CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a construction method for synchronous jacking up of the bridge as a whole to replace the bearings, which can effectively solve the problem of the project beam without destroying the bridge structure and changing the stress conditions of the bridge structure by adopting the method of multi-point whole jacking. Due to the limitations of large tonnage and small space, the bridge is in good operation after the bearings are replaced

Method used

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  • Construction method for synchronously jacking whole bridge to replace support
  • Construction method for synchronously jacking whole bridge to replace support
  • Construction method for synchronously jacking whole bridge to replace support

Examples

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Effect test

Embodiment 1

[0125] Example 1: This construction method was successfully applied to the bridge bearing replacement project of the third phase of Changfenggang Bridge on Qianjiang Road, Anqing. The project is located in Anqing City. It took only 14 days to complete the replacement task of 144 bearings, which not only greatly shortened The construction period was met, the opening to traffic requirements were realized as soon as possible, and the local traffic conditions were improved. At the same time, compared with the traditional construction method, it saves cost and resources, and creates more economic and social benefits. Moreover, this technology is reliable and operable, which improves the construction quality of bridge bearing replacement and plays an important role in ensuring the overall safety of the bridge structure. Sex is also very important.

Embodiment 2

[0126] Example 2: This construction method was successfully applied to the bridge support replacement project in the Ruian viaduct repair project of G104 Ruian section. The project is located in Ruian City. It took only 13 days to complete the replacement task of 112 supports, which was shorter than the planned construction period. 8 days, laying a solid foundation for the early opening to traffic. At the same time, compared with the traditional construction method, it saves cost and resources, and creates more economic and social benefits. Moreover, this technology is reliable and operable, which improves the construction quality of bridge bearing replacement and plays an important role in ensuring the overall safety of the bridge structure. Sex is also very important.

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Abstract

The invention provides a construction method for synchronously jacking the whole bridge to replace a support, and belongs to the field of municipal construction. The construction method comprises thefollowing steps that S1, preparation work is carried out before jacking; S2, jacking preparation is carried out; S3, trial jacking is carried out; S4, a main beam is jacked synchronously; and S5, thesupport is replaced. Temporary supporting is conducted so that the old support is withdrawn, a leveling steel plate is additionally arranged, and the beam is fallen down; after the leveling steel plate and the new support are installed, beam falling and reset operation can be conducted, all jacks are subjected to oil returning and beam falling synchronously, the beam body needs to be kept overallbalanced in the beam falling process, and synchronous overall beam falling is conducted according to the jacking inverse process and in a graded mode till the beam body is completely fallen. Accordingto the construction method, on the premise that the bridge structure is not damaged and the stress condition of the bridge structure is not changed, the limitation that the engineering beam is largein tonnage, small in space and the like is effectively solved by adopting a multi-point whole jacking mode, the support is replaced well, and the bridge operation condition is good.

Description

technical field [0001] The invention belongs to the field of municipal construction, and relates to a construction method for synchronous jacking up of a bridge as a whole to replace supports. Background technique [0002] The construction of municipal roads and expressways in my country is developing rapidly. At present, some municipal roads and expressways have entered the period of major and medium repairs. A considerable number of bridges need to be repaired every year. The bearings of some bridges are aging or damaged and need to be replaced; According to modern traffic requirements, the clearance under the bridge of some bridges no longer meets the traffic requirements and needs to be raised. As an economical and fast construction method, the overall bridge lifting technology has been widely used in the construction of bridge heightening and bearing replacement, and the application of bridge synchronous lifting technology is very important for maintaining the integrity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/04
CPCE01D19/04E01D21/00
Inventor 杨涛李振收李广聂金龙
Owner POWERCHINA MUNICIPAL CONSTR GRP CO LTD
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