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Void-preventing visual pouring method for second-lining concrete of tunnel

A tunnel and anti-shedding technology, applied in the direction of tunnel lining, tunnel, wellbore lining, etc., can solve the problem of lack of economical reliability in the prevention and control of the secondary lining of the tunnel, so as to reduce project quality risks, improve construction quality and efficiency, and achieve high application and reliability. The effect of promoting value

Inactive Publication Date: 2019-03-19
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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AI Technical Summary

Problems solved by technology

At present, there is no economical and reliable method for the prevention and treatment of the second lining of the tunnel for reference

Method used

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  • Void-preventing visual pouring method for second-lining concrete of tunnel
  • Void-preventing visual pouring method for second-lining concrete of tunnel

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Embodiment Construction

[0017] A method for visual pouring of tunnel second-lined concrete for void prevention, comprising the following steps:

[0018] Step (1): During the pouring process of the second lining of the tunnel, a transparent rigid PVC pipe is arranged longitudinally, and the transparent rigid PVC pipe is arranged side by side with the longitudinal grouting pipe and the exhaust pipe of the vault;

[0019] Step (2): Place a visible probe in the transparent rigid PVC pipe during the pouring process;

[0020] Step (3): Put the visual probe into the first pouring hole to observe the pouring of the vault concrete. If void is found, enter step (3.1); if void is found, proceed to step (3.2);

[0021] Step (3.1): After the void is found, inject grout into the radial grouting pipe and pour again. After the pouring is completed, enter step (3.2);

[0022] Step (3.2): After the vault pouring is completed, review, fill in the records, save the image data, take out the visible probe, and grout the ...

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Abstract

The invention discloses a void-preventing visual pouring method for second-lining concrete of a tunnel. In the pouring process of a tunnel second-lining arch, a high transparent hard PVC pipe is longitudinally arranged between a pouring mold and a tunnel arch top and has the diameter of 20-50 mm, and the pipe, an arch top longitudinal grouting pipe and an exhausting pipe are arranged side by side;in the pouring process, a visual probe is placed in the transparent PVC pipe, the concrete pouring situation of the second-lining arch top can be observed in the second-lining arch pouring process inreal time, namely the concrete pouring of the second-lining arch top of the tunnel is visual. Compared with the prior art, the void-preventing visual pouring method has the advantages that the construction problem of concrete voids of a second-lining arch wall of the tunnel in existing tunnel second-lining arch pouring process is solved, meanwhile the construction quality risk is reduced, and theconstruction quality and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of engineering construction methods, and in particular relates to a visual pouring method for anti-vacation of the second lining of a tunnel. Background technique [0002] According to the design principles of railway tunnels, the primary support and secondary lining of the tunnel form a composite load-bearing structure, in which the primary support structure occupies a dominant position in the permanent force-bearing structures of the surrounding rocks of grades II and III, and the secondary lining structure is in the surrounding rock tunnels of grades IV and V. Dominant in permanent stress structures. Therefore, the construction quality of the secondary lining will significantly affect the mechanical characteristics of the tunnel structure, which in turn will lead to hidden dangers affecting the safety of the tunnel structure. [0003] Preventing the concrete void of the secondary lining arch wall is an i...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/102E21D11/105
Inventor 陈正山文朝维户少勇张久昌胡胜
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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