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Repair method for concrete defect of expansion grouting pipe and tunnel lining

A repair method and concrete technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of concrete bonding force, tunnel leakage, and sagging gravity, etc., saving time and energy. Human and material resources, protection from the danger of spark burning, good bonding effect

Active Publication Date: 2021-08-27
北京鸿锐嘉科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Using repair mortar to repair, there is a problem of concrete bonding force between the old and new interfaces
At the same time, due to the relatively large bulk density of mortar (generally, the density of mortar is 2200kg / cubic meter), the drooping gravity is relatively large, and there is a danger of the tunnel falling
[0006] 2. Even if the defect of the core hole is polished and the loose stones around it are not repaired, although the hidden danger of the tunnel falling in the future is considered, it affects the quality and appearance of the tunnel. At the same time, the existence of the core hole will cause The hidden danger of tunnel leakage in the future is mainly manifested in the following forms: if the welding of the waterproof board pavement is damaged, in the rainy season when the rain is particularly heavy, the water pressure will often leak water in places where the concrete structure is weak and where the core hole is taken.

Method used

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  • Repair method for concrete defect of expansion grouting pipe and tunnel lining
  • Repair method for concrete defect of expansion grouting pipe and tunnel lining
  • Repair method for concrete defect of expansion grouting pipe and tunnel lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An expansion grouting pipe is provided in this embodiment, which includes a sleeve, a fixing plate, an expansion cone, an expansion rod, an expansion bolt, a tray and a fixing nut;

[0040] One end of the sleeve is provided with at least one sleeve gap along its axial direction; in this embodiment, the number of the sleeve gaps is 4, and the four sleeve gaps are evenly distributed along the circumference of the sleeve .

[0041] A fixing plate is arranged on the inner side wall of the sleeve, preferably, the fixing plate is arranged along an axis perpendicular to the sleeve, and a through hole is opened in the middle of the fixing plate.

[0042] The radius of the expansion cone gradually decreases from left to right, and the diameter of the expansion cone is larger than the inner diameter of the sleeve; one end of the expansion rod is fixed to the end with a smaller diameter of the expansion cone, and the other end Through the fixed plate, located on the right side of...

Embodiment 2

[0048] This embodiment provides a repair method for tunnel lining concrete defects. The tunnel lining concrete defects include tunnel lining concrete coring holes. The repair method includes:

[0049] S10, cleaning the core hole

[0050] In this embodiment, the dust on the inner wall of the coring hole is removed by using high-pressure gas so that when the filling material is used to fill the coring hole, good bonding force can be achieved between the filling material and the inner wall of the coring hole.

[0051] S20, install expansion grouting pipe and exhaust pipe

[0052] The expansion grouting pipe can be the expansion grouting pipe described in Embodiment 1, or other expansion grouting pipes.

[0053] When installing the expansion grouting pipe, first insert the expansion grouting pipe more than 20cm into the core hole, and fix the expansion grouting pipe.

[0054] The exhaust pipe adopts a steel pipe or iron pipe with a diameter of 8mm (the diameter of the pipe can b...

Embodiment 3

[0084] This embodiment provides a repair method for tunnel lining concrete defects, the tunnel lining concrete defects include tunnel lining concrete core holes, the repair method and the repair method in Example 2 lie in the first polyurethane spraying hard foam and the second The components and contents of the two polyurethane spray hard foams are different. Specifically, in this embodiment, the first polyurethane spray hard foam includes 100 parts by mass of PM200 and 20 parts by weight of MDI50; the second polyurethane spray hard foam The foam includes the following components in parts by weight: DL1000: 42.3; YRLK-100: 21.15; E-100: 4.1; Diethylene glycol: 7.3; flame retardant DOher6209: 14.1; foam stabilizer SD641: 0.85; KH560: 0.85; T12: 0.85; water: 0.35; and gray paste: 8.4.

[0085] Operating time, foaming ratio is tested according to JC / T2041-2010 "Polyurethane Grouting Materials", foam density is tested according to GB / T6343 "Foam Plastics and Rubber-Determination ...

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Abstract

The invention discloses a method for repairing defects in expansion grouting pipes and tunnel lining concrete. The method for repairing defects in tunnel lining concrete includes: S10, cleaning the core holes; S20, installing expansion grouting pipes and exhaust pipes; S30 . Making filling materials; S40, filling the filling materials; S50, wiping fireproof decoration materials. The method for repairing the defect of tunnel lining concrete of the present invention adopts lightweight filling materials (such as polyurethane foam material, epoxy material, lightweight mortar, etc.) and professional construction equipment, and adopts pressure injection, pressure maintaining and pressure control systems. It is composed of anti-secondary block-dropping construction technology, convenient support technology, coating anti-contact net spark combustion polymer mortar, etc., and makes the invention have low bulk density, high binding force, fast curing speed, light construction equipment, and tooling technology Simple, no need for templates and supports.

Description

technical field [0001] The invention relates to a repairing process for an expansion grouting pipe and a tunnel lining concrete core hole, in particular to a repairing method for tunnel lining concrete defects. Background technique [0002] Our country is a mountainous country, so the amount of tunnels is also very large. In the tunnel lining (secondary lining) construction, due to the special position of the vault, the construction may be due to the reservation of pouring and unreasonable setting of plugging holes, the slump of the pumped concrete is large, the pressure of the pumped concrete is not well controlled, and the concrete Shrinkage, uneven support and other reasons will inevitably cause the second-lined vault and the concrete primary support surface to not adhere closely, and the concrete capping of the arch is prone to voids and cavities. [0003] Due to secondary lining defects, the stress on the lining is uneven, which deteriorates the stress condition of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13C09K8/44C09K8/42C08G18/76C08G18/66C08G18/48C08G18/32
CPCC08G18/3203C08G18/3225C08G18/4812C08G18/7664C09K8/428C09K8/44E21B33/13
Inventor 佘海龙耿春雷郭宝树
Owner 北京鸿锐嘉科技发展有限公司
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