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Construction method for pressure pouring of concrete for tunnel secondary lining

A technology of pouring concrete and secondary lining, which is applied in the direction of tunnel lining, tunnel lining, shaft lining, etc. It can solve the problems that the lining method of construction trolleys cannot be adopted, there are many joints in the lining blocks, and the waterproof effect is poor, so as to achieve good waterproof effect, Good engineering effect and safe construction

Inactive Publication Date: 2015-09-09
广西建工第五建筑工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. There are many joints between the lining blocks, and the overall waterproof effect is poor;
[0004] 2. Low construction efficiency and long construction period;
[0005] 3. When encountering a multi-section tunnel, the construction trolley cannot adopt the construction trolley lining method due to the constraints of the tunnel section size and other conditions

Method used

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  • Construction method for pressure pouring of concrete for tunnel secondary lining
  • Construction method for pressure pouring of concrete for tunnel secondary lining
  • Construction method for pressure pouring of concrete for tunnel secondary lining

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Embodiment Construction

[0032] A tunnel secondary lining pressure pouring concrete construction method, comprising the following steps:

[0033] (1) Pre-embedded right-angled pump pipe: welded by Φ140 steel pipe and a 90° elbow, or directly bent Φ140 steel pipe to 90°, the length of one side of the right angle is 0.35m, and the length of the other side of the right angle is 1.2m;

[0034] (2) Installing reinforcement frames: erecting reinforcement frames on the side walls and vaults of the tunnel. The length of each arch along the length of the tunnel is 20-40m, divided into inner and outer layers, and the distance between the inner and outer layers is the thickness of the concrete minus the thickness of the reinforcement and protective layer;

[0035] According to the design requirements, after deducting the thickness of the steel bars and the protective layer, the clear space distance between the inner and outer steel bars of the steel frame should be greater than the diameter of the embedded pump ...

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Abstract

Provided is a construction method for pressure pouring of concrete for tunnel secondary lining. The construction method comprises following steps: (1) machining right-angle-type pre-embedded pump pipes; (2) building a reinforcement frame on the side walls and the vault of the tunnel; (3) installing the pre-embedded pump pipes between an inner layer and an outer layer of the vault reinforcement frame; (4) sealing by utilizing a template and reserving working windows; (5) enabling pressure-pouring conveying pipes to stretch into the working windows for pouring the side walls and connecting the pressure-pouring pipes with the pre-embedded pump pipes for pouring the vault; (6) detaching the template and maintaining concrete. The construction method for pressure pouring of concrete for tunnel secondary lining has following beneficial effects: the construction method is simple in design, safe in construction, fine in engineering effect and high in construction efficiency and is favorable to reduction in the construction period and decrease in engineering cost; the pre-embedded pipes are utilized for pressure pouring of concrete; the side walls and the vault is formed by one-time pouring so as to effectively ensure compactness of integral concrete pouring among the side walls and the vault without cracks; fine overall water-proof effect for secondary lining is obtained; and the construction method is applicable to integral construction of tunnels and culverts in various kinds and different fracture surfaces.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method of pressure pouring concrete for secondary lining of tunnels. Background technique [0002] The traditional construction of the tunnel side wall and the second lining of the vault generally adopts the construction trolley method, and the prefabricated lining blocks are constructed block by block to form a whole, and then the secondary grouting is added to ensure that the overall structure meets the requirements; the traditional construction method There are following deficiencies: [0003] 1. There are many joints between the lining blocks, and the overall waterproof effect is poor; [0004] 2. Low construction efficiency and long construction period; [0005] 3. When encountering a multi-section tunnel, the construction trolley cannot adopt the construction trolley lining method due to the constraints of the tunnel section size and other co...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 黄日龙杨雄朱其绎李茂华白洁俊
Owner 广西建工第五建筑工程集团有限公司
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