A support system and construction method for mainline bridge cap beams

By adopting a cap beam formwork support system in bridge construction, the problem of traditional full-span scaffolding occupying the river channel was solved, achieving efficient bridge construction and protection of the river channel function, and shortening the construction period.

CN122128972APending Publication Date: 2026-06-02CCCC TUNNEL ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CCCC TUNNEL ENG CO LTD
Filing Date
2026-04-16
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional mainline bridge cap beam construction uses a full-span scaffolding method, which occupies a large area of ​​the river channel under the bridge, has a long cofferdam closure period, and construction is restricted during the flood season, leading to delays in progress.

Method used

A cap beam formwork support system is adopted, including a first cap beam formwork support and a second cap beam formwork support, which are erected above the bracket structure and the auxiliary road bridge to form an integrated support system, avoiding the occupation of the river channel under the bridge, and optimizing the stability of the support structure by adjusting the formwork height and load distribution.

Benefits of technology

It does not require occupying the river channel under the bridge, ensuring the river's flood control and navigation functions, is not affected by the flood season, shortens the construction period, and improves the stability and construction efficiency of the support system.

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Abstract

This invention relates to the field of bridge construction technology, and discloses a support system and construction method for a mainline bridge cap beam. The system includes: a cap beam formwork support, which provides a supporting foundation for the mainline bridge cap beam formwork; the cap beam formwork support includes: a first cap beam formwork support and a second cap beam formwork support; multiple bracket structures connected to the existing mainline bridge piers; both ends of the bracket structures extend outward beyond the mainline bridge piers, forming cantilever ends; the first cap beam formwork support is erected on the cantilever ends of the bracket structures, with its top providing support for the mainline bridge cap beam formwork; the second cap beam formwork support is erected above the existing auxiliary road bridge deck, with its top providing support for the mainline bridge cap beam formwork; the first and second cap beam formwork supports are connected to form an integrated support system. Because the cap beam formwork support does not occupy the river channel area under the bridge, it ensures that the river's flood control and navigation functions are not affected; and it effectively shortens the construction period.
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