Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure

A technology of prestressed steel and structural pairs, applied in bridge reinforcement, bridge, bridge maintenance, etc., can solve problems affecting the normal operation of trains, and achieve good durability and flexible and convenient construction

Inactive Publication Date: 2010-09-22
SHANGHAI GIANT PRESTRESSING ENG
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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 overcome the shortcomings of traditional transverse reinforcement methods that seriously affect the normal operation of trains. The present invention provides a brand-new transverse prestressed reinforcement construction process, which solves the above problems

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  • Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure
  • Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure
  • Construction method for transversely strengthening railway bridge by utilizing prestressing steel structure

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Embodiment Construction

[0023] The construction method of the present invention will be further elaborated below in conjunction with the accompanying drawings. The lateral reinforcement system of the prestressed steel structure of the present invention is composed of lateral support steel members, cold-drawn four-stage finish-rolled threaded steel bars, neutral anti-corrosion grease and high-density polyethylene protective caps.

[0024] In conjunction with the accompanying drawings, the present invention uses the prestressed steel structure to carry out the detailed steps of railway bridge lateral reinforcement:

[0025] (1) The horizontal support steel member 1 is manufactured in a factory, and is treated with anti-corrosion protection, and the cold-drawn four-grade finish-rolled threaded steel bar 2 is ordered; the horizontal support steel member 1 is made of U-shaped channel steel 15, 16, steel plates 17, 18 and The seamless steel pipe 12 is formed; the seamless steel pipe 12 is placed in the inn...

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Abstract

The invention relates to a construction method for transversely strengthening a railway bridge by utilizing a prestressing steel structure. By adopting the prestressing steel structure for transversely strengthening, the defect that the traditional method affects the normal operation of a train is overcome; and by galvanizing steel members, filling a potting material and a structural adhesive to form three-layer anti-corrosive protection, smearing neutral grease on anchorage devices at two ends, and installing a protective nut cap, the whole structural system is enabled to have good durability. The invention has flexible, simple, and convenient construction and is a high-efficiency construction method.

Description

technical field [0001] The invention relates to a construction method for laterally strengthening railway bridges by using prestressed steel structures. Background technique [0002] With the continuous increase of the train speed and the increase of the total weight, the railway bridges built in the early days were limited by the design standards and construction level at that time. The transverse connection between the bridge beams was weak, and the transverse stiffness of the beams was obviously insufficient, which could not meet the requirements of modern traffic. need. The traditional method of the Railway Bureau for such bridges with insufficient lateral stiffness is to plant steel bars, support formwork, pour concrete, and finally strengthen by stretching and pre-embedded transverse prestressed steel bars. This method affects the normal operation of the train during the construction period, especially during the solidification of the concrete. The passage of the trai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
Inventor 张保和刘耀武李传平
Owner SHANGHAI GIANT PRESTRESSING ENG
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