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Repair method of tunnel secondary lining concrete exposed reinforcement

A secondary lining and repair method technology, applied in the direction of tunnel lining, tunnel, shaft lining, etc., to achieve the effect of increasing tensile and impermeable strength, solving anti-corrosion, and beautiful appearance

Inactive Publication Date: 2019-04-09
福建省陆海工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to deal with the poor section of tunnel surrounding rock, insufficient steel protection layer or exposed or even exposed steel diseases, and effectively solve the problems of reinforced concrete structure anti-corrosion, structural durability and safety, waterproof and drainage, etc.

Method used

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  • Repair method of tunnel secondary lining concrete exposed reinforcement
  • Repair method of tunnel secondary lining concrete exposed reinforcement

Examples

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Embodiment 1

[0027] A method for repairing exposed reinforcement of concrete in a secondary lining of a tunnel, comprising the following steps:

[0028] a. Determine the insufficient protective layer of the steel bar or the location of the exposed bar damage, and use the corrosion potential measuring instrument to detect the corrosion of the steel bar in the tunnel. Different corrosion levels will produce different corrosion potentials, which will cause changes in the full battery potential. Evaluate the corrosion state by the electric potential of the point, and evaluate its corrosion activity according to the evaluation standard, and mark the contour line of the inner arch surface of the secondary lining 1 where the steel reinforcement protective layer is insufficient or the exposed reinforcement diseased part needs to be repaired, and the treatment area 2 is obtained;

[0029] b. Use a high-pressure air gun to clean the surface of the treatment area;

[0030] c. Apply a layer of water-b...

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Abstract

The invention discloses a repair method of tunnel secondary lining concrete exposed reinforcement. The repair method comprises the following steps: a, determining the location of an insufficient protective layer of a steel bar or the exposed reinforcement disease to obtain a treatment area; b, cleaning the surface of the treatment area by adopting a high-pressure blower gun; c, coating the surfaceof the treatment area with a layer of waterborne antirust paint, coating the waterborne antirust paint with a layer of epoxy resin cement gum primer layer and paving an alkaline-resistant fiberglassgridding cloth composite layer on the epoxy resin cent primer layer; d, detecting corrosion potential as an initial corrosion potential by utilizing a corrosion potential measuring instrument; and e,testing the corrosion potential every three months, dynamically analyzing the corrosion degree, evaluating the activation degree according to evaluation standards and comprehensively evaluating the quality of disease repair. The repair method of the tunnel secondary lining concrete exposed reinforcement, disclosed by the invention, has the advantages that the problems of rust resistance, structural durability, safety, waterproofing and drainage and the like of reinforced concrete structures are effectively solved.

Description

technical field [0001] The invention relates to a method for repairing the exposed reinforcement of the secondary lining concrete of a tunnel. Background technique [0002] With the rapid development of my country's traffic, the mileage of various roads is increasing, and the number of new and completed tunnels is also increasing year by year. Various tunnel diseases or defects affect the safety of tunnels. Tunnel protection generally consists of three layers, from the inside to the outside are the primary support layer, the water-proof layer and the secondary lining layer, and the water-proof layer is mostly made of waterproof boards. In particular, the secondary lining of tunnel lining with poor surrounding rock is often reinforced concrete structure. However, due to various reasons during construction, after the steel formwork is removed, the protective layer of steel reinforcement is insufficient or even the reinforcement is exposed, which is called exposed reinforcement...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 喻珍福董学绸陈航林石泉郑清松刘海青秦志清李鹏勋郭建文吴桂栓姜拥政邱英俊潘建标
Owner 福建省陆海工程科技有限公司
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