Method for repairing sulphate attack disease of tunnel lining concrete structure

A concrete structure, sulfate technology, applied in tunnel lining, tunnel, shaft lining and other directions, can solve the problems of frequent repair of tunnel structure, repair technology and poor economic effect of repair materials, etc., to improve the anti-sulfate corrosion performance, application Convenience and the effect of prolonging service life

Inactive Publication Date: 2011-12-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to many reasons, the comprehensive technical and economic effects of most of the current repair technologies and repair materials are not good, and the tunnel structure has fallen into a vicious circle of frequent repairs

Method used

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  • Method for repairing sulphate attack disease of tunnel lining concrete structure
  • Method for repairing sulphate attack disease of tunnel lining concrete structure
  • Method for repairing sulphate attack disease of tunnel lining concrete structure

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Embodiment

[0046] The technology of the invention has been applied and practiced in the Farah Tunnel of the Guangtong Section of the Yunnan-Chengdu-Kunming Railway. The Chengdu-Kunming Railway is the main line of the southwest railway built in the late 1960s in my country. Due to its location in the southwest, complex geological conditions and widespread sulfate erosion media, the engineering structure, especially the railway tunnel structure, has extremely harsh service environment conditions. Therefore, most sections of the railway It has been in the maintenance stage for many years, and the practice of repairing this application is selected in the Farah Tunnel with typical sulfate erosion conditions (such as figure 1 As shown in the figure: 1-lining concrete, 2-surrounding rock, 3-air surface), the tunnel is severely corroded by sulfate and requires continuous maintenance for many years to ensure the safe operation of the railway.

[0047] On the basis of investigating and analyzing th...

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Abstract

The invention discloses a method for repairing the sulphate attack disease of a tunnel lining concrete structure, comprising the following steps of: firstly, effectively cleaning a disease region, isolating and dredging erosive ions, reinforcing original rib materials; secondly, repairing by adopting an erosion-resistant repairing material and processing a surface coating, and ensuring the whole repair construction quality; and finally, achieving effective repair of the diseased tunnel structure. According to the method, the sulphate attack resistance of the tunnel lining concrete structure with the salt attack disease can be remarkably improved, and the service life of the original tunnel structure is effectively prolonged; and the method has the characteristics of technical and economic advantages and strong maneuverability.

Description

technical field [0001] The invention relates to a method for repairing the sulfate corrosion damage of the existing tunnel concrete structure, which effectively prolongs the service life of the existing tunnel lining concrete structure under the sulfate corrosion condition. Background technique [0002] Tunnel is a kind of cavity-shaped structure buried under the (rock) soil layer. The outside is affected by the surrounding rock (soil) and the water and ion medium in the rock layer; the internal structure is empty and affected by the relatively closed atmospheric environment. ; At the same time, in the operating state, it is also affected by the operation of pedestrians and vehicles. Its typical structure type is shown in the accompanying drawing part of the specification figure 1 shown. The special structural type of the tunnel is obviously different from the general concrete structure, which is mainly reflected in the fact that both the inside and outside of the lining c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/04
Inventor 龙广成翁璧石李小昆马昆林谢友均
Owner CENT SOUTH UNIV
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