Method for rapidly repairing fallen shield tail brush without reinforcing stratum

Abstract

The invention discloses a method for rapidly repairing a fallen shield tail brush without reinforcing a stratum, and belongs to the technical field of tunnel shield construction equipment. An inner plate which is the same as an original shield tail brush is machined, a thick pressing plate which is completely consistent with a welding hole of the inner plate of the shield tail brush in position is machined, and the inner plate is arranged at the position, close to the shield tail brush, of a duct piece; the damaged position is manually cleaned, the machined inner plate is plugged into the damaged shield tail brush, the plugged inner plate is compacted and electrically welded to the shield tail brush beside the inner plate through a tool, and after the machined pressing plate and the inner plate are aligned to the vacant position, complete welding is conducted. The method has the advantages of being high in economic benefit, safe in construction, short in construction period and low in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel shield construction equipment, and more particularly relates to a method for quickly repairing a fallen shield tail brush in an unreinforced stratum. Background Art

[0002] With the development of subway construction, integrated pipeline corridors and high-rise buildings, the available resources in urban underground space are gradually decreasing. The shield tunnel lines planned in the later period will inevitably be designed with complex lines and located in underground spaces with great burial depth and poor geological conditions. When a shield machine is excavating in poor geological conditions with complex lines, it not only requires a high level of workmanship from the construction unit, but also puts a great test on the wear and tear of the shield machine's tail brush. If the shield tail brush falls off or other faults occur during the shield excavation process, the shield tail will leak water and slurry. Most of the existing methods for repairing the shield tail brush are to stop the shield machine, reinforce the surrounding soil, remove the pipe segments, and then repair the shield tail brush. This method is time-consuming and labor-intensive, seriously affecting the construction progress, and various costs are continuously consumed during the repair process, which also increases safety risks. Therefore, how to provide a method for quickly repairing a fallen shield tail brush without reinforcing the stratum is a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0003] In view of this, the present invention provides a method for quickly repairing a fallen shield tail brush in an unreinforced stratum, which adopts the following technical solutions:

[0004] A method for quickly repairing a fallen shield tail brush in an unreinforced stratum comprises the following steps:

[0005] S1. Process an inner plate that is consistent with the original shield tail brush;

[0006] S2. Process a pressure plate that is exactly the same as the hole position of the inner plate;

[0007] S3. Insert the inner plate into the cover of the damaged shield tail brush. Use a tool to flatten and compact the inner plate and the remaining wire brush. Align the inner plate and cover, then spot weld them securely.

[0008] S4. Place the pressure plate on the outside of the shield tail brush cover, align the holes with the inner plate, and compact them. Spot weld the holes.

[0009] S5. Weld the pressure plate to the inner plate, and then completely weld the pressure plate to the original shield tail brush that has not fallen off through the hole.

[0010] Furthermore, the inner plate is completely consistent with the original shield tail brush cover plate in terms of bending angle, thickness, hole position and material.

[0011] Furthermore, the thickness of the pressure plate is greater than the thickness of the inner plate.

[0012] Furthermore, the pressure plate and the shield tail brush perforation positions are fully welded to ensure strength.

[0013] Furthermore, the inner plate is made of 3mm thick Q235 steel plate, and the pressure plate is made of 7mm thick Q235 steel plate.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a method for quickly repairing a fallen shield tail brush in unreinforced strata, which not only improves operational efficiency but also significantly shortens construction time and reduces the time required to replace and repair the shield tail brush, significantly reducing costs and improving economic benefits while ensuring safety and achieving excellent application results. The method reduces the time required to repair the shield tail brush and the risks involved in replacing the shield tail brush. A rational combination of methods is employed throughout the entire implementation process to achieve rapid and efficient repair of the shield tail brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the inner plate structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the pressing plate structure of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the repaired shield tail brush of the present invention.

[0020] Among them, in the figure: 1-inner plate; 2-pressure plate. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Please see the attached Figure 1-3 The present invention provides a method for quickly repairing a fallen shield tail brush in an unreinforced stratum, comprising the following steps:

[0023] S1 processing a shield with the original tail brush cover 3 bending angle, thickness, hole position, material exactly the same inner plate 1;

[0024] S2 processing a hole in the inner plate 1 exactly the same pressure plate 2, the thickness of the pressure plate 2 is greater than the thickness of the inner plate 1;

[0025] S3. After cleaning the damaged area, insert the inner plate 1 into the cover of the damaged shield tail brush 3. Then use a tool (jack or crowbar) to flatten and compact the inner plate 1 and the undetached wire brush. Align the inner plate 1 with the cover and then spot weld them in place.

[0026] S4. The processed pressure plate 2 is placed on the outside of the shield tail brush cover 3, and after compacting the inner plate 1 on the hole, spot weld the holes;

[0027] S5. Completely weld the pressure plate 2 to the inner plate 1, and then completely weld the pressure plate 2 to the original shield tail brush 3 that has not fallen off through the hole position, and fully weld the perforated position to ensure strength.

[0028] The inner plate 1 is made of 3mm thick Q235 steel, and the pressure plate is made of 7mm thick Q235 steel. These plates offer excellent weldability, excellent workability, universal material, convenient construction, and wide application. They must meet specific standards for tensile strength ≥370MPa, yield strength ≥300MPa, elongation ≥20%, and hardness range of 120-150. Impact toughness must meet specific standards to ensure safety under impact loads. Double-sided welding is used to meet on-site requirements, and weld quality must be inspected.

[0029] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0030] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for quickly repairing a fallen shield tail brush in an unreinforced stratum, characterized in that: The following steps are involved: S1. Processing a piece of inner plate (1) consistent with the original shield tail brush (3); S2. Processing a plate (2) with the inner plate (1) having the same hole position; S3. Insert the inner plate (1) into the cover of the damaged shield tail brush (3), and then use a tool to flatten and compact the inner plate (1) with the wire brush that has not fallen off. Align the inner plate (1) with the cover and then spot weld it; S4. Place the pressure plate (2) on the outside of the cover of the shield tail brush (3), and compact the inner plate (1) after the hole, and spot weld the hole; S5. Connect the pressing plate (2) and the inner plate (1) by welding, and then completely weld the pressing plate (2) and the undetached portion of the original shield tail brush (3) through the hole.

2. The method for quickly repairing a fallen shield tail brush in an unreinforced stratum according to claim 1 is characterized in that: The inner plate (1) is completely consistent with the original shield tail brush (3) cover plate in terms of bending angle, thickness, hole position and material.

3. The method for quickly repairing a fallen shield tail brush in an unreinforced stratum according to claim 1 is characterized in that: The thickness of the pressing plate (2) is greater than the thickness of the inner plate (1).

4. The method for quickly repairing a fallen shield tail brush in an unreinforced stratum according to claim 1 is characterized in that: The pressure plate (2) and the shield tail brush (3) are fully welded at the perforation positions to ensure strength.

5. The method for quickly repairing a fallen shield tail brush in an unreinforced stratum according to claim 1 is characterized in that: The inner plate (1) is made of 3mm thick Q235 steel plate, and the pressure plate is made of 7mm thick Q235 steel plate.

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