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Construction method for assembling prefabricated cantilevers of large-span sections of bridge to span existing bridge

A construction method and large-span technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of complex bridge construction procedures and limited construction space, and achieve good technical and economic benefits, short construction period, and convenient construction. Effect

Inactive Publication Date: 2020-12-15
HENAN WUJIAN CONSTR GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] (1) The existing bridge construction process is relatively complicated, requiring on-site support erection and formwork installation
[0006] (2) The existing construction needs to set up construction measures such as Baotong door openings, and the construction space is limited

Method used

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  • Construction method for assembling prefabricated cantilevers of large-span sections of bridge to span existing bridge
  • Construction method for assembling prefabricated cantilevers of large-span sections of bridge to span existing bridge

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] Aiming at the problems existing in the prior art, the present invention provides a construction method for prefabricated cantilever assembly spanning existing bridges with large-span segments. The present invention will be described in detail below with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the bridge long-span segment prefabricated cantilever assembly method provided by the present invention spans the existing bridge construction method comprising the following steps:

[0028] S101, the segmental beams are manufactured in a centralized manner in a factory, and are transported t...

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Abstract

The invention belongs to the technical field of bridge construction, and discloses a construction method for assembling prefabricated cantilevers of large-span sections of a bridge to span existing bridge. Segment beams are manufactured in a factory-like centralized mode and transported to the site in a segmented mode to be assembled. The sections are symmetrically installed one by one till midspan closure, and a pavement layer does not need to be poured on the bridge floor. After concrete of the closure section is poured, the last batch of steel strands are tensioned, and system conversion ofthe whole bridge is completed. The segmental beams are assembled by utilizing a deck crane lifting beam, the segments are connected by adopting shear keys and epoxy resin glue, and permanent tensioning is carried out after each symmetrical segment is installed. The segments are connected through the shear keys and the epoxy resin glue, construction is easy and convenient, the effects of short construction period and attractive bridge type are achieved, and the prefabricated segment cantilever assembled bridge can well meet the structural function requirement and has good technical and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method for prefabricated cantilever assembly spanning an existing bridge with a large-span segment of the bridge. Background technique [0002] At present: highway construction is developing rapidly, especially highway construction, and bridge construction, which is an important part of highway construction, has also developed accordingly. However, due to problems such as urban space, construction requirements, and uninterrupted traffic during construction, the cast-in-place reinforced concrete bridges that are commonly used in urban bridges often cannot coordinate various problems in the construction process. [0003] The existing bridge construction process is relatively complicated, requiring on-site support erection, formwork installation, etc.; and the existing construction needs to set up construction measures such as openings, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10
CPCE01D21/10
Inventor 崔方凯纪中杨乐能国宝丁庆亮李志敏郭马迁汪海于勇波郭军辉吴进董艺卓耿帅何月利霍本玉
Owner HENAN WUJIAN CONSTR GRP
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