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Construction method of reserved grouting pipe of tunnel vault

A construction method and technology of grouting pipe

Inactive Publication Date: 2015-09-09
CHINA RAILWAY 21ST BUREAU GROUP THE FOURTH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the test results of many tunnels in the past, voids and cavities generally have the highest probability of appearing in the vault, and the most voids and cavities are detected. Drill holes in the cavity, and then connect the grouting pipe for grouting, and each hole needs to drill two holes, one grouting hole and one grouting hole, which takes a long time and a lot of work, because the void And the cavity mostly occurs in the vault, so the main drilling and grouting work is also concentrated in the vault, and the drilling and grouting of the vault is more difficult. At present, there is no ideal vault grouting method Available for use, and there is no public report on related technologies

Method used

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  • Construction method of reserved grouting pipe of tunnel vault
  • Construction method of reserved grouting pipe of tunnel vault

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specific Embodiment approach

[0018] a. After the excavation, initial support, inverted arch and bottom laying of the tunnel are completed, waterproof cloth shall be constructed on the initial support surface of the tunnel, and the second lining steel bars shall be bound;

[0019] b. Before the secondary lining trolley is in place, install the perforated corrugated pipe (1) close to the waterproof cloth. The diameter of the perforated corrugated pipe (1) is 55mm, and the rubber rod (1) is inserted into the perforated corrugated pipe (1). 2), the diameter of the rubber rod (2) is 50mm, each end of the rubber rod (2) protrudes 500mm from the port of the perforated corrugated pipe (1), and the perforated corrugated pipe (1) is drawn out and fixed at both ends of the second lining trolley On the second lining steel bar, as close as possible to the waterproof board;

[0020] c. Pouring the second lining concrete (4), when pouring to the top, pull the rubber rods (2) at both ends regularly so that the grout does...

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Abstract

The invention discloses a construction method of a reserved grouting pipe of a tunnel vault. According to the technical scheme, the construction method comprises arranging waterproof fabrics on the primary supporting surface of a tunnel and binding secondary lining rebars; arranging a corrugated pipe with a hole in close attachment with the waterproof fabrics and enabling the corrugated pipe with the hole to penetrate a rubber bar; pouring secondary lining concrete and timely drawing the rubber bar at two ends; drawing out the rubber bar after initial setting is achieved and forming a secondary lining concrete vault grouting hole channel; grouting a reserved hole channel and enabling a vault cavity to be filled with grout after the grout passes through the small hole of the corrugated pipe with the hole. According to the construction method of the reserved grouting pipe of the tunnel vault, the grouting hole channel is reserved during tunnel construction and accordingly the grouting on the secondary concrete vault cavity can be rapidly achieved, the process of vault drilling after radar detection is omitted, the construction time is saved, the construction cost is reduced, and the construction quality of the tunnel concrete is ensured.

Description

technical field [0001] The invention relates to a construction method of a grouting pipe for a tunnel, in particular to a construction method for a grouting pipe reserved for a tunnel vault, and belongs to the field of road and bridge construction. Background technique [0002] In tunnel construction, ground radar inspection must be carried out after the construction of lining concrete is completed, and one of the inspection items is voids and cavities behind the lining concrete. According to the test results of many tunnels in the past, voids and cavities generally have the highest probability of appearing in the vault, and the most voids and cavities are detected. Drill holes in the cavity, and then connect the grouting pipe for grouting, and each hole needs to drill two holes, one grouting hole and one grouting hole, which takes a long time and a lot of work, because the void And the cavity mostly occurs in the vault, so the main drilling and grouting work is also concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 黄宏斌
Owner CHINA RAILWAY 21ST BUREAU GROUP THE FOURTH ENG
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