Quick Repair Method of Existing Expansion Joints in Railway Concrete Bridges

A repair method and concrete technology, applied in bridge maintenance, bridges, bridge parts, etc., can solve the problems of loss of waterproof and sealing function, poor embedding of rubber strips, failure to achieve waterproofing of bridge decks, etc. Maintenance and repair, easy to use in large quantities

Inactive Publication Date: 2011-12-28
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) When the water-stop rubber strip was first installed, the rubber strip was not firmly embedded due to the inconvenience of construction, which laid a hidden danger for the occurrence of diseases;
[0006] 2) The water-stop rubber strip falls off from the embedded groove of the shaped steel, resulting in the comp

Method used

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  • Quick Repair Method of Existing Expansion Joints in Railway Concrete Bridges
  • Quick Repair Method of Existing Expansion Joints in Railway Concrete Bridges
  • Quick Repair Method of Existing Expansion Joints in Railway Concrete Bridges

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Example Embodiment

[0030] Example 1

[0031] Will now refer to Figure 1-5 A preferred embodiment of the present invention will be described in detail. among them, figure 1 It is a schematic diagram of a railway bridge expansion joint structure repaired according to a preferred embodiment of the present invention.

[0032] A rapid repair method for existing expansion joints of railway concrete bridges, including the following steps: a. removing residual water-stop rubber strips; b. removing scum, floating soil, oil stains on the concrete base surface and the exposed surface of the metal side beam Rust and other dirt and garbage, and then dry; c. Select the bottom lining and side lining according to the beam end condition and the width of the beam gap, install and position the bottom lining and side lining, the bottom lining consists of multiple sections of 2-3m Long plate-like or rod-like materials are spliced ​​together; d. Spraying primer: the primer should be evenly sprayed, not piled up and no...

Example Embodiment

[0035] Example 2

[0036] Next, refer to figure 1 Next, another preferred embodiment of the present invention will be described in detail. A quick repair method for existing expansion joints of railway concrete bridges, including the following steps:

[0037] a. Removal of failed existing expansion joints: The failure of the existing expansion joints of high-speed railway bridges mainly manifests the falling off and peeling of the water-stop rubber strips, the blockage of the drainage channels, and it cannot be repaired and replaced. Therefore, for quick repair, the original water-stop rubber strip must be removed first; for ballasted tracks, the ballast retaining cover must also be removed.

[0038] b. Cleaning and drying the bonding base surface: the treatment of the base surface is the process of removing scum, floating soil, oil, rust and other dirt and garbage on the exposed surface of the concrete base surface and the metal edge beam, and drying process , Special attention s...

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Abstract

A rapid repair method for the existing expansion joints of railway concrete bridges, comprising the following steps: a, removing residual water-stop rubber strips; b, removing dirt and garbage on the concrete base surface and the exposed surface of metal edge beams, and then Drying; c, installing and positioning the underlayment and side lining; d, spraying the primer; e, pouring the repair material; f, spraying the top coat; g, after the repair material is basically cured, the repair is completed. The repair method of the invention can adapt to various irregular sizes of bridge joints; installation and replacement are fast and convenient; the polyurethane repair material itself has good durability and weather resistance, and is suitable for rapid repair; the price is moderate, and it is convenient for mass use.

Description

technical field [0001] The invention relates to a rapid repair method for expansion joints of railway bridges, in particular to a rapid repair method for existing expansion joints of railway concrete bridges. Background technique [0002] After the large-scale construction of high-speed railways, my country's high-speed railways have gradually entered the operation stage. In order to ensure the long-term operation safety of high-speed railways, corresponding durability requirements for high-speed railway infrastructure have been put forward in the design stage. For high-speed railway bridges, my country The durability goal of 100-year service life is clearly proposed in the design codes for high-speed railway bridges. Years of operating experience have shown that more than 90% of the various factors affecting the durability of bridges are related to water damage. Therefore, setting up effective bridge deck defense and drainage systems is one of the main measures to ensure str...

Claims

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Application Information

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IPC IPC(8): E01D22/00E01D19/06
Inventor 牛斌马林胡所亭王乐然肖祥淋
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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