Construction method of carbon fiber reinforced wall

Abstract

The invention discloses a construction method of a carbon fiber reinforced wall, which comprises the following steps of: removing a wall surface layer, and cleaning; positioning and paying off are conducted on the pasting part, the drilling position is confirmed, a drilling machine is used for drilling a hole to penetrate through the wall, and a hole is cleaned up; cutting the carbon fiber cloth and the carbon fiber flexible rivets according to the required size; preparing carbon fiber glue in proportion, coating the carbon fiber glue on the wall surface by adopting a gluing device, then paving carbon fiber cloth, and then painting a layer of carbon fiber glue on the surface of the carbon fiber cloth; carbon fiber flexible rivets are implanted into the wall body through the holes, so that the carbon fiber bundles at the two ends are exposed out of the holes in the front and back wall surfaces, and carbon fiber glue is smeared; preparing embedded steel bar glue, punching the embedded steel bar glue into the holes, spreading the carbon fiber bundles exposed out of the holes on the front and back wall surfaces to form a circle, pasting the carbon fiber bundles on the surface of the carbon fiber cloth, and coating a layer of carbon fiber glue on the surfaces of the carbon fiber bundles. The three-dimensional reinforcing method that the two faces of the wall body are jointly stressed is adopted, and the effect that the front face and the back face of the wall body are comprehensively stressed and reinforced is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wall reinforcement, in particular to a method for reinforcing a wall with carbon fibers. Background Art

[0002] Carbon fiber cloth is a key component commonly used in structural reinforcement projects. Conventional carbon fiber cloth weighing 300g / ㎡ or above has a high surface density, making it difficult for conventionally applied carbon fiber glue to penetrate the cloth. This prevents the cloth from fully utilizing its properties, resulting in poor reinforcement results and impacting construction quality. High-weight carbon fiber cloth reinforcement in China typically utilizes multiple layers of 200g / ㎡ or 300g / ㎡ carbon fiber cloth. This method requires high construction requirements and costs, and is prone to delamination and failure between layers.

[0003] In addition, in order to ensure a stable connection of the carbon fiber cloth, a carbon fiber anchor is used to fix the carbon fiber cloth, and gluing is also required. There are generally two situations for gluing operations. For example: In situation one, glue is applied to the wall first, and then the carbon fiber cloth is pasted on the wall; in situation two, a hole is drilled in the wall, glue is applied in the hole, and then the carbon fiber anchor is inserted into the hole, and the carbon fiber anchor is fixed in the hole with glue. The above two gluing methods require the use of two gluing devices. When applying glue, a rubber roller is required; when injecting glue into the hole, an injection device is required. Therefore, during on-site operations, it is necessary to constantly and frequently replace the gluing tools, resulting in low construction efficiency. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a method for reinforcing walls with carbon fibers to solve the problems of delamination and failure between the current carbon fiber cloths and low construction efficiency during gluing operations.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A method for reinforcing a wall with carbon fibers, comprising the following steps:

[0007] S1: Use an angle grinder to chisel off the surface of the wall or concrete surface and clean it;

[0008] S2: Position and lay out the design drawings at the location where the sticker is to be pasted, confirm the drilling position, use a drill to drill through the wall, and clean the hole;

[0009] S3: Cutting the carbon fiber cloth and the carbon fiber flexible rivet according to the design requirements, wherein the two ends of the carbon fiber flexible rivet are connected to a plurality of flexible carbon fiber bundles;

[0010] S4: Prepare carbon fiber glue in proportion, apply the glue to the wall or concrete surface using a glue-applying device, then cover with carbon fiber cloth, use a plastic scraper to apply pressure along the fiber direction on the carbon fiber cloth and repeatedly scrape and press to fully impregnate the carbon fiber glue and eliminate bubbles, then apply a layer of carbon fiber glue on the surface of the carbon fiber cloth;

[0011] S5: Use a cable tie to fix the carbon fiber bundle at one end into a bundle, insert it into the hole, and insert the carbon fiber flexible rivet into the wall through the hole. According to the designed length requirements, make the carbon fiber bundles at both ends protrude from the holes on the front and back walls, and apply carbon fiber glue;

[0012] S6: Prepare the anchor glue in proportion and seal the hole at one end of the wall. Use the glue-applying device to inject the anchor glue into the hole. Spread the carbon fiber bundles exposed outside the hole on both sides of the wall into a circular shape and stick them on the surface of the carbon fiber cloth. Then apply a layer of carbon fiber glue on the surface of the carbon fiber bundles.

[0013] S7: Sprinkle yellow sand or quartz sand on the surface of the carbon fiber glue before it is cured. After the carbon fiber glue is completely cured, apply a protective layer or paint layer on the surface.

[0014] Preferably, in S1, an angle grinder is used to remove a 1-2 mm thick surface layer, and a blower is used to clean the surface of the wall to expose a clean, flat, and structurally solid surface. If cracks exist in the reinforced concrete, grouting glue or crack caulking glue should be used depending on the size of the cracks before reinforcement.

[0015] Preferably, in S2, the drill hole is cleaned using a blower and a brush.

[0016] Preferably, in S4, when preparing the carbon fiber glue, use a low-speed stirrer to stir evenly without generating bubbles; the carbon fiber glue should not be mixed too much at one time, and ensure that the prepared glue is used up within 25-35 minutes at a temperature range of 20-30°C.

[0017] Preferably, in S4, if defects, potholes, sunken corners, and high waists at the template joints are found on the pasting surface, use leveling glue to scrape and fill and repair them to ensure that there is no obvious height difference at the joints, defects, potholes are smooth and flat, and the sunken corners are filled with rounded transitions. After the leveling glue is cured, the carbon fiber cloth is pasted.

[0018] Preferably, the gluing device includes a handle, which is fixedly connected to a support rod, and an L-shaped delivery pipe is fixedly connected to the support rod, one side of the delivery pipe is connected to a first branch pipe, and a rubber roller is rotatably installed on the periphery of the delivery pipe, the end of the delivery pipe away from the handle passes through the rubber roller, and the passing end is threadedly connected to a nozzle, the end of the delivery pipe away from the nozzle is fixedly connected to a limiting ring, the outer wall of the delivery pipe close to the nozzle is provided with a thread, and is connected to a limiting nut through the thread; a tee is connected to the first branch pipe, and the remaining two ends of the tee are respectively connected to a second branch pipe and a hose, the hose is connected to the glue supply device, the second branch pipe is L-shaped, one side of which is located obliquely above the rubber roller, and a plurality of glue outlet holes are provided on the side of the second branch pipe facing the rubber roller, and ball valves are installed on both the first branch pipe and the second branch pipe.

[0019] Preferably, the glue supply device includes a stirring tank, a pump body is installed on one side of the stirring tank, an outlet on the pump body is connected to a hose, and the hose is connected to a three-way pipe.

[0020] Preferably, one end of the delivery pipe close to the tee pipe is connected to a support plate, and the second branch pipe is installed on the support plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Applicable to structures with insufficient wall and concrete strength. Adding carbon fiber flexible rivets solves the problem of failure due to shelling caused by the simple use of carbon fiber cloth reinforcement, which cannot fully bear the force with the structure. The carbon fiber cloth and the wall become a whole, and the radiation range of the reinforcement effect is wider. The three-dimensional reinforcement method with the two sides of the wall bearing the force together is adopted to achieve the effect of comprehensive force reinforcement on both sides of the wall.

[0023] (2) Glue can be applied on the wall through the gluing device, and glue can also be injected into the drilled hole through the gluing device. There is no need to frequently replace the gluing device, which improves the efficiency of gluing and thus improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a process flow chart of the present invention;

[0025] Figure 2 is a schematic diagram of the gluing device;

[0026] Figure 3 This is a disassembled diagram of the delivery pipe, limit nut, and nozzle;

[0027] Figure 4 It is a schematic diagram of the connection between the glue applying device and the glue supply device;

[0028] Figure 5 Schematic diagram of carbon fiber flexible rivet;

[0029] Figure 6Schematic diagram of the connection between carbon fiber flexible rivets and carbon fiber cloth;

[0030] In the figure: 1-handle, 2-support rod, 3-delivery pipe, 4-first branch pipe, 5-rubber roller, 6-sprinkler, 7-limiting ring, 8-limiting nut, 9-tee pipe, 10-second branch pipe, 11-hose, 12-glue outlet hole, 13-ball valve, 14-mixing tank, 15-pump body, 16-support plate, 17-carbon fiber flexible rivet, 18-carbon fiber bundle, 19-carbon fiber cloth. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1

[0033] See also Figure 1 A method for reinforcing a wall with carbon fibers comprises the following steps:

[0034] S1: Use an angle grinder to chisel away the surface paint, oil, dirt, etc. on the wall or concrete surface. The thickness of the surface removed should be 1-2mm. Then use a blower to clean the surface of the wall to reveal a clean, flat, and solid surface. If there are cracks in the reinforced concrete, you should first use grouting glue or caulking glue depending on the size of the cracks before reinforcement.

[0035] S2: Position and lay out the designed pasting area according to the design drawing, confirm the drilling position, use a drill to drill through the wall, and clean the holes with a blower and a brush.

[0036] S3: Cutting the carbon fiber cloth and the carbon fiber flexible rivet according to the design requirements, wherein a plurality of flexible carbon fiber bundles are connected to both ends of the carbon fiber flexible rivet.

[0037] S4: Prepare carbon fiber glue in proportion. When preparing carbon fiber glue, use a low-speed stirrer to stir evenly without generating bubbles. Do not mix too much carbon fiber glue at one time. Ensure that the prepared glue is used up within 25-35 minutes at a temperature range of 20-30℃.

[0038] Before gluing, if you find any defects, potholes, sunken corners, or high waists at the template joints on the pasting surface, use leveling glue to scrape and fill them to ensure that there is no obvious height difference at the joints, defects, potholes are smooth, and the sunken corners are filled with rounded transitions. Wait until the leveling glue is cured before pasting the carbon fiber cloth.

[0039] When applying glue, use a gluing device to apply carbon fiber glue on the wall or concrete surface, then cover it with carbon fiber cloth, use a plastic scraper to apply pressure along the fiber direction on the carbon fiber cloth and repeatedly scrape it to make the carbon fiber glue fully impregnate the carbon fiber cloth and eliminate bubbles, and then apply a layer of carbon fiber glue on the surface of the carbon fiber cloth.

[0040] S5: Use a cable tie to fix the carbon fiber bundle at one end into a bundle, implant it into the hole, and implant the carbon fiber flexible rivet into the wall through the hole. According to the designed length requirements, make the carbon fiber bundles at both ends expose the holes on the front and back walls, and apply carbon fiber glue.

[0041] S6: Prepare the anchor glue in proportion and seal the hole at one end of the wall. Use the glue-applying device to inject the anchor glue into the hole. Spread the carbon fiber bundles exposed outside the holes on the front and back walls into a circular shape and stick them on the surface of the carbon fiber cloth. Then apply a layer of carbon fiber glue on the surface of the carbon fiber bundles.

[0042] S7: Sprinkle yellow sand or quartz sand on the surface of the carbon fiber glue before it is cured. After the carbon fiber glue is completely cured, apply a protective layer or paint layer on the surface.

[0043] This carbon fiber wall reinforcement method is suitable for structures with insufficient wall or concrete strength. The addition of carbon fiber flexible rivets solves the problem of carbon fiber sheet reinforcement alone failing to fully share the load with the structure and prone to shelling failure. The carbon fiber sheet and wall become one integrated whole, extending the reinforcement range. Furthermore, by combining the load on both sides of the wall and employing a three-dimensional reinforcement method, comprehensive reinforcement is achieved on both sides.

[0044] Example 2

[0045] A gluing device includes a handle 1, to which a support rod 2 is fixedly connected, to which an L-shaped delivery tube 3 is fixedly connected. A first branch tube 4 is connected to one side of the delivery tube 3, and a rubber roller 5 is rotatably mounted on the periphery of the delivery tube 3. The rubber roller 5 includes a central tube and a sponge tube fixed to the periphery of the central tube. The central tube is rotatably mounted on the delivery tube 3. The end of the delivery tube 3 away from the handle passes through the rubber roller 5, and a nozzle 6 is threadedly connected to the protruding end. The nozzle 6 is connected to the delivery tube 3. The end of the delivery tube 3 away from the nozzle is fixedly connected to a limit ring 7. The outer wall of the delivery tube 3 near the nozzle is threaded and connected to a limit nut 8. By removing the limit nut 8 and the nozzle 6, the rubber roller 5 can be removed and replaced with a new one. After the rubber roller 5 is installed on the conveying pipe 3, the limit nut 8 and the nozzle 6 are installed in sequence. The cooperation between the limit nut 8 and the limit ring 7 prevents the rubber roller 5 from swinging left and right, so that the rubber roller 5 can rotate along the conveying pipe 3 between the limit nut 8 and the limit ring 7.

[0046] The first branch pipe 4 is connected to a tee pipe 9. The remaining two ends of the tee pipe 9 are respectively connected to a second branch pipe 10 and a hose 11. The hose 11 is connected to the glue supply device. The second branch pipe 10 is L-shaped, with one side located obliquely above the rubber roller 5. The side of the second branch pipe 10 facing the rubber roller is provided with a plurality of glue outlet holes 12. The glue outlet holes 12 are located obliquely above the circular cross-section of the rubber roller 5. The glue discharged from the second branch pipe 10 will fall onto the rubber roller 5 through the glue outlet holes 12. Moreover, when the side of the rubber roller 5 away from the second branch pipe 10 contacts the wall, the second branch pipe 10 will not affect the application of the rubber roller 5 to the wall.

[0047] Ball valves 13 are installed on both the first branch pipe 4 and the second branch pipe 10 , and the opening and closing of the first branch pipe and the second branch pipe are controlled by the two ball valves 13 .

[0048] The glue supply device includes a mixing tank 14, with a pump body 15 mounted on one side of the mixing tank 14. A hose 11 is connected to the outlet of the pump body 15, and the hose 11 is connected to the tee 9. Glue is added from the top of the mixing tank 14, where it is stirred by the stirring mechanism to prevent solidification. The glue is then pumped through the pump body 15 to the hose 11, and then from the hose 11 to the tee 9, and then to the first branch pipe 4 and the second branch pipe 10, respectively.

[0049] One end of the delivery pipe 3 close to the tee is connected to a support plate 16, and the second branch pipe 10 is installed on the support plate 16. The support of the support plate 16 can improve the stability of the second branch pipe.

[0050] The handle described in this embodiment can be made of wood or plastic, the support rod, support plate, and the central tube of the rubber roller can all be made of plastic, and the delivery pipe, first branch pipe, second branch pipe, tee pipe, nozzle, ball valve, limit ring, and limit nut can be made of stainless steel or aluminum alloy.

[0051] The method of using this embodiment is:

[0052] When glue needs to be applied to the wall, the ball valve 13 on the second branch pipe 10 is opened, the ball valve 13 on the first branch pipe 4 is closed, and the pump body 15 is started. The glue in the mixing tank 14 is sent to the hose 11 through the pump body 15, and then sent to the second branch pipe 10 by the hose 11, and falls onto the glue roller 5 through the glue outlet hole 12 on the second branch pipe 10. By manually holding the handle 1, the side of the glue roller 5 away from the second branch pipe is applied to the wall, thereby achieving gluing of the wall surface.

[0053] When glue needs to be injected into the hole, the handle 1 is manually held, the nozzle 6 is aimed at the hole, and then the ball valve 13 on the first branch pipe 4 is opened, the ball valve 13 on the second branch pipe 10 is closed, and the pump body 15 is started. The glue in the mixing tank 14 is sent to the hose 11 through the pump body 15, and then sent to the first branch pipe 4 by the hose 11, and enters the delivery pipe 3 through the first branch pipe 4, and finally sprayed out by the nozzle 6, thereby injecting glue into the hole.

[0054] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for reinforcing a wall with carbon fiber, characterized by: The following steps are involved: S1: Use an angle grinder to chisel off the surface of the wall or concrete surface and clean it; S2: Position and lay out the design drawings at the location where the sticker is to be pasted, confirm the drilling position, use a drill to drill through the wall, and clean the hole; S3: Cutting the carbon fiber cloth and the carbon fiber flexible rivet according to the design requirements, wherein the two ends of the carbon fiber flexible rivet are connected to a plurality of flexible carbon fiber bundles; S4: Prepare carbon fiber glue in proportion, apply the glue to the wall or concrete surface using a glue-applying device, then cover with carbon fiber cloth, use a plastic scraper to apply pressure along the fiber direction on the carbon fiber cloth and repeatedly scrape and press to fully impregnate the carbon fiber glue and eliminate bubbles, then apply a layer of carbon fiber glue on the surface of the carbon fiber cloth; S5: Use a cable tie to fix the carbon fiber bundle at one end into a bundle, insert it into the hole, and insert the carbon fiber flexible rivet into the wall through the hole. According to the designed length requirements, make the carbon fiber bundles at both ends protrude from the holes on the front and back walls, and apply carbon fiber glue; S6: Prepare the anchor glue in proportion and seal the hole at one end of the wall. Use the glue-applying device to inject the anchor glue into the hole. Spread the carbon fiber bundles exposed outside the hole on both sides of the wall into a circular shape and stick them on the surface of the carbon fiber cloth. Then apply a layer of carbon fiber glue on the surface of the carbon fiber bundles. S7: Sprinkle yellow sand or quartz sand on the surface of the carbon fiber glue before it is cured. After the carbon fiber glue is completely cured, apply a protective layer or paint layer on the surface.

2. The method for reinforcing a wall with carbon fibers according to claim 1, characterized in that: In S1, use an angle grinder to remove the 1-2mm thick surface layer, and use a blower to clean the surface of the wall to expose a clean, flat, and structurally solid surface. If there are cracks in the reinforced concrete, you should first use grouting glue or caulking glue depending on the size of the cracks before reinforcement.

3. The method for reinforcing a wall with carbon fibers according to claim 2, characterized in that: In S2, the drilled hole is cleaned using a blower and a brush.

4. The method for reinforcing a wall with carbon fibers according to claim 3, characterized in that: In S4, when preparing carbon fiber glue, use a low-speed stirrer to stir evenly without generating bubbles; the carbon fiber glue should not be mixed too much at one time, and ensure that the prepared glue is used up within 25-35 minutes within the temperature range of 20-30℃.

5. The method for reinforcing a wall with carbon fibers according to claim 4, characterized in that: In S4, if there are defects, potholes, sunken corners, or high waists at the template joints on the pasting surface, use leveling glue to scrape and fill them to ensure that there is no obvious height difference at the joints, defects, potholes are smooth, and the sunken corners are filled with rounded transitions. After the leveling glue is cured, the carbon fiber cloth can be pasted.

6. The method for reinforcing a wall with carbon fibers according to claim 5, characterized in that: The gluing device comprises a handle (1), a support rod (2) fixedly connected to the handle (1), an L-shaped delivery pipe (3) fixedly connected to the support rod (2), one side of the delivery pipe (3) connected to a first branch pipe (4), a rubber roller (5) rotatably mounted on the periphery of the delivery pipe (3), an end of the delivery pipe (3) away from the handle passes through the rubber roller (5), and the passing end is threadedly connected to a nozzle (6), an end of the delivery pipe (3) away from the nozzle is fixedly connected to a limiting ring (7), and an end of the delivery pipe (3) close to the nozzle is fixedly connected to a limiting ring (7). The outer wall is provided with a thread and is connected to a limit nut (8) through the thread; a tee pipe (9) is connected to the first branch pipe (4), and the remaining two ends of the tee pipe (9) are respectively connected to the second branch pipe (10) and a hose (11); the hose (11) is connected to the glue supply device; the second branch pipe (10) is L-shaped, and one side of the second branch pipe is located obliquely above the rubber roller (5); a plurality of glue outlet holes (12) are opened on the side of the second branch pipe (10) facing the rubber roller; and ball valves (13) are installed on both the first branch pipe (4) and the second branch pipe (10).

7. The method for reinforcing a wall with carbon fibers according to claim 6, characterized in that: The glue supply device comprises a stirring tank (14), a pump body (15) is installed on one side of the stirring tank (14), a hose (11) is connected to the outlet of the pump body (15), and the hose (11) is connected to the three-way pipe (9).

8. The method for reinforcing a wall with carbon fibers according to claim 7, characterized in that: One end of the delivery pipe (3) close to the tee pipe is connected to a support plate (16), and the second branch pipe (10) is installed on the support plate (16).

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