A carbon fiber reinforced polymer reinforcement device and method for reinforcing a reinforced concrete beam

Abstract

This invention provides a carbon fiber reinforcement device and method for reinforced concrete beams and slabs, designed for the construction field. It includes a support device, a tensioning device, carbon fiber reinforcement strips, and a stabilizing device. The support device includes a fixed-end support and a tensioning-end support aligned by a bolt-anchoring process. The tensioning device includes a mounting shell, snap-fit ​​components built into the shell plates at both ends of the mounting shell, a tensioning strip component located at the bottom of the mounting shell, and a tightening nut component located inside the mounting shell. This invention provides a carbon fiber reinforcement device and method for reinforced concrete beams and slabs with a simple construction process, convenient loading, and a larger reinforcement space.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a carbon fiber reinforcement device and method for reinforced concrete beams and slabs. Background Technology

[0002] Carbon fiber reinforcement is commonly used to add carbon fiber reinforcement materials to reinforced concrete beams and slabs to improve their load-bearing capacity and crack resistance. It can enhance the load-bearing capacity, crack resistance, and durability of concrete beams and slabs, while reducing the self-weight of bridges. Using carbon fiber reinforcement to strengthen concrete beams and slabs is an efficient, economical, and feasible beam and slab reinforcement technology that can improve the load-bearing capacity and durability of beams and slabs, and is widely used in bridges, buildings, and other fields. However, carbon fiber reinforcement has disadvantages such as complex construction processes and high costs. Therefore, there is a need for a carbon fiber reinforcement device and method for reinforced concrete beams and slabs that can simplify the process and save costs.

[0003] According to application number 201810195091.7, a carbon fiber reinforcement device and method for reinforced concrete beams and slabs are disclosed. First, the carbon fiber reinforcement and anchorages are assembled. Holes are drilled in the beam, and the anchorage device is fixed to the beam using chemical anchors. Then, the tensioning device and carbon fiber reinforcement are installed on a support frame, and the carbon fiber reinforcement is tensioned using a jack. After completion, the support frame is removed. This invention has a simple structure, and the reinforcement method is easy to implement, making it suitable for widespread use in various situations requiring reinforced concrete reinforcement.

[0004] The aforementioned patent document simplifies the structure by installing a simple tensioning jack on the concrete beam slab, but it has the disadvantage of requiring additional installation and dismantling of the tensioning device, which increases the number of procedures and reduces work efficiency. Summary of the Invention

[0005] In view of the above problems, the present invention provides a carbon fiber reinforcement device and method for reinforced concrete beams and slabs, the purpose of which is to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a carbon fiber reinforcement device for reinforced concrete beams and slabs, comprising a support device, a tensioning device, carbon fiber reinforcement strips, and a stabilizing device. The support device includes a fixed end support and a tensioning end support aligned by a bolt-anchoring process. The tensioning device includes a mounting shell, snap-fit ​​components built into the shell plates at both ends of the mounting shell, a tensioning strip component located at the bottom of the mounting shell, and a nut tightening component located inside the mounting shell.

[0007] Preferably, the tensioning end support has two protrusions aligned at each end, a first groove in the middle of one end of the tensioning end support, and a rib hole in the center of the other end. In this preferred embodiment, the protrusions serve as the mounting points for the tensioning device, and the first groove facilitates the operation of the nut tightening component.

[0008] Preferably, the mounting shell includes a guide hole at one end and a second groove at the other end. In this preferred embodiment, the guide hole stabilizes the screw-in nut component, and the second groove prevents it from being blocked by the carbon fiber ribs during installation.

[0009] Preferably, the snap-fit ​​component includes four third grooves at both ends of the mounting shell, a sliding groove next to one of the third grooves, a slider with a handle that is slidably disposed inside the sliding groove, and a rectangular groove in the third groove away from the sliding groove. In this preferred embodiment, the tensioning device is suspended on the tensioning end support by the snap-fit ​​component.

[0010] Preferably, the tensioning component includes a load-bearing plate at the bottom of the mounting housing, a hydraulic cylinder in the middle of the load-bearing plate, a first connecting plate at the actuating end of the hydraulic cylinder, two connecting rods bolted to both sides of the first connecting plate, a second connecting plate bolted to the other end of the two connecting rods, a fourth groove at the top of the second connecting plate, and a pressure sensor at the edge of the fourth groove. In this preferred embodiment, the hydraulic cylinder and connecting components provide the tension required for the tensioning process, and the pressure sensor determines the degree of tension.

[0011] Preferably, the nut tightening component includes a pull rod passing through the guide hole, a handle located at one end of the pull rod away from the mounting housing, a motor located at the other end of the pull rod, a screw-tightening tube located at the actuating end of the motor, and a spring with one end abutting against the inner wall of the mounting housing and the other end abutting against the bottom of the motor. In this preferred embodiment, the nut tightening component tightens the pre-fixed nut during the tensioning process to prevent the carbon fiber reinforcement from retracting after the tensioning process is completed.

[0012] Preferably, the carbon fiber reinforcement bar includes threaded rods at both ends, and sleeves are threadedly connected to the threaded rods. In this preferred embodiment, the carbon fiber reinforcement bar is tightly fixed by the sleeves on the threaded rods to prevent frictional displacement during tensioning.

[0013] Preferably, the stabilizing device includes an Ω-shaped bracket, second bolt holes on both sides of the Ω-shaped bracket, and a semi-cylindrical groove inside the Ω-shaped bracket. In this preferred embodiment, by designing that the semi-cylindrical groove has the same outer diameter as the sleeve, the sleeve can be fixed after the Ω-shaped bracket is installed, thereby fixing the carbon fiber reinforcement strip.

[0014] Preferably, the fixed end bracket and the tensioning end bracket are steel U-shaped frames, and several first bolt holes are provided at the bottom of the fixed end bracket and the tensioning end bracket. In this preferred embodiment, the U-shaped frame bracket facilitates the installation and loading of the tensioning device.

[0015] According to a technical solution for a carbon fiber reinforcement device for reinforced concrete beams and slabs, a method for reinforcing reinforced concrete beams and slabs with carbon fiber reinforcement will also be provided, including the following steps:

[0016] Step 1: Surface treatment of the reinforcement location: Remove the plaster and protective concrete layer from the surface of the reinforced concrete beam and slab where reinforcement is required, grind the uneven parts of the surface, and seal the wider cracks with sealant.

[0017] Step 2, carbon fiber reinforcement pre-assembly: Insert both ends of the carbon fiber reinforcement strip into the fixed end bracket and the tensioning end bracket respectively, and adjust the length of both ends of the carbon fiber reinforcement strip with nuts according to the reinforcement length;

[0018] Step 3: Install the two end supports: Drill holes in the reinforced concrete beam slab according to the positions of the fixed end support and the tensioning end support and the corresponding positions of the first bolt holes inside them, and fix the fixed end support and the tensioning end support to the concrete beam slab with chemical bolts.

[0019] Step 4: Tensioning the carbon fiber reinforcement: Place the tensioning device on the tensioning end bracket, prevent displacement by using the snap-fit ​​component, tension the carbon fiber reinforcement by using the tensioning bar component, and pre-fix the tensioned carbon fiber reinforcement by using the nut tightening component.

[0020] Step 5: Install the reinforcing cover plate: Based on the position of the sleeve on the tensioned carbon fiber reinforcement strip and the distribution of the second bolt holes on the stabilizing device, drill holes in the reinforced concrete beam slab, and use chemical bolts to fit the stabilizing device onto the sleeve and fix it to the reinforced concrete beam slab.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] In this embodiment, the tensioning device, which can be quickly mounted on the tensioning end support, avoids the need to drill holes to install and remove the tensioning device each time tensioning is performed, thereby improving the reinforcement efficiency of reinforced concrete beams and slabs and saving the materials required for tensioning.

[0023] By mounting the carbon fiber reinforcement on the tensioning end support, the disadvantage of the tensioning device occupying the reinforcement space is avoided, and the reinforcement length of the carbon fiber reinforcement can be increased to both ends of the reinforced concrete beam and slab, thereby increasing the reinforcement area.

[0024] The screw nut component effectively prevents the carbon fiber reinforcement from springing back after tensioning. The stabilizing device further strengthens the tensioned carbon fiber reinforcement, resulting in a better reinforcement effect. Attached Figure Description

[0025] Figure 1 This is an isometric view of the overall structure of the present invention;

[0026] Figure 2 This is a partial structural schematic diagram of the present invention;

[0027] Figure 3 This is an isometric view of the overall tensioning device of the present invention;

[0028] Figure 4 This is an enlarged view of the tensioning device of the present invention;

[0029] Figure 5 This is an isometric view of the stabilizing device of the present invention;

[0030] Figure 6 This is a flowchart of the construction method of the present invention.

[0031] In the diagram: 10. Support device; 20. Tensioning device; 30. Carbon fiber reinforcing bar; 40. Stabilizing device; 11. Fixed end support; 12. Tensioning end support; 21. Mounting shell; 22. Snap-fit ​​component; 23. Tensioning bar component; 24. Nut tightening component; 121. Protrusion; 122. First groove; 123. Reinforcing bar hole; 211. Guide hole; 212. Second groove; 221. Third groove; 222. Slide groove; 223. Sliding block with handle; 22 4. Rectangular groove; 231. Support plate; 232. Hydraulic cylinder; 233. First connecting plate; 234. Connecting rod; 235. Second connecting plate; 236. Fourth groove; 237. Pressure sensor; 241. Pull rod; 242. Handle; 243. Motor; 244. Screw tube; 245. Spring; 31. Threaded rod; 32. Sleeve; 41. Ω-shaped bracket; 42. Second bolt hole; 43. Semi-cylindrical groove; 111. First bolt hole. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The embodiments of the present invention will now be described. Example

[0034] Please refer to the appendix carefully. Figure 1 , 2As shown in Figure 6, a carbon fiber reinforcement device for reinforced concrete beams and slabs includes a support device 10, a tensioning device 20, carbon fiber reinforcement strips 30, and a stabilizing device 40. The support device 10 includes a fixed end support 11 and a tensioning end support 12 aligned by a bolting and anchoring process. The tensioning device 20 includes a mounting shell 21, snap-fit ​​components 22 built into the shell plates at both ends of the mounting shell 21, a pull bar component 23 located at the bottom of the mounting shell 21, and a screw nut component 24 located inside the mounting shell 21. The fixed end support 11 and the tensioning end support 12 are steel U-shaped frames. Several first bolt holes 111 are located at the bottom of the fixed end support 11 and the tensioning end support 12. Two protrusions 121 are aligned at each end of the tensioning end support 12. A first groove 122 is located in the middle of one end of the tensioning end support 12, and a reinforcement strip hole 123 is located in the center of the other end. The carbon fiber reinforcement strip 30 includes threaded rods 31 at both ends and sleeves 32 threadedly connected to the threaded rods 31.

[0035] It should be noted that the fixed end bracket 11 is also provided with a rib hole 123 at one end. The inner diameter of the mounting shell 21 is slightly larger than the outer diameter of the tension end bracket 12. The size of the first groove 122 is slightly larger than the outer diameter of the guide hole 211. The threaded rod 31 is formed by industrial engraving at both ends of the carbon fiber rib 30. The sleeve 32 is a threaded tube with an inner thread that meshes with the outer thread of the threaded rod 31.

[0036] Furthermore, before installing the reinforcement device, the surface of the reinforced concrete beams and slabs at the locations requiring reinforcement should be pre-treated.

[0037] Furthermore, the two sleeves 32 are respectively fitted into the two threaded rods 31, and the threaded rods 31 at both ends of the carbon fiber rib 30 are respectively fitted into the fixed end bracket 11 and the tensioning end bracket 12 through the rib hole 123. The fitting length of the threaded rod 31 is adjusted by the nut according to the reinforcement length.

[0038] Furthermore, holes are drilled at corresponding positions on the surface of the reinforced concrete beam and slab, and the fixed end bracket 11 and the tensioning end bracket 12 are installed on the surface of the reinforced concrete beam and slab through chemical screws and the first bolt hole 111.

[0039] Please refer to the appendix carefully. Figure 1 , 3As shown in Figures 4 and 6, the mounting housing 21 includes a guide hole 211 at one end and a second groove 212 at the other end. The snap-fit ​​component 22 includes four third grooves 221 at both ends of the mounting housing 21, a sliding groove 222 beside the third groove 221, a slider 223 with a handle that slides inside the sliding groove 222, and a rectangular groove 224 in the third groove 221 away from the sliding groove 222. The pull bar component 23 includes a load-bearing plate 231 at the bottom of the mounting housing 21, a hydraulic cylinder 232 in the middle of the load-bearing plate 231, a first connecting plate 233 at the actuating end of the hydraulic cylinder 232, and bolt connections. Two connecting rods 234 on both sides of the first connecting plate 233, a second connecting plate 235 bolted to the other end of the two connecting rods 234, a fourth groove 236 on the top of the second connecting plate 235, a pressure sensor 237 on the edge of the fourth groove 236, and a nut tightening component 24 including a pull rod 241 passing through the guide hole 211, a handle 242 on the end of the pull rod 241 away from the mounting housing 21, a motor 243 on the other end of the pull rod 241, a screw tightening tube 244 on the actuating end of the motor 243, and a spring 245 with one end abutting against the inner wall of the mounting housing 21 and the other end abutting against the bottom of the motor 243.

[0040] It should be noted that the size of the second groove 212 is slightly larger than the outer diameter of the threaded rod 31, which is used to prevent the threaded rod 31 from blocking the installation when the tensioning device 20 is loaded. The size of the third groove 221 is slightly larger than the outer diameter of the protrusion 121. The size of the fourth groove 236 is slightly larger than the outer diameter of the carbon fiber rib 30, but smaller than the outer diameter of the sleeve 32, which is used to bear the force during tensioning.

[0041] Furthermore, by pulling the lever 241 out along the guide hole 211 through the handle 242, the spring 245 is contracted, and the motor 243 and the screw tube 244 are offset toward the handle 242.

[0042] Furthermore, the mounting shell 21 is fitted over the tension end bracket 12. At this time, the second groove 212 is fitted over the threaded rod 31, all the third grooves 221 are fitted over the protrusions 121, and the fourth groove 236 is fitted over the carbon fiber ribs 30 and abuts against the sleeve 32.

[0043] Furthermore, release handle 242, spring 245 rebounds, pushing motor 243 and screw tube 244 forward until screw tube 244 is fitted onto nut of fixed threaded rod 31;

[0044] Furthermore, slide the slider 223 with handle out of the groove 222 until the slider 223 with handle is engaged in the rectangular groove 224 to complete the fixation of the tensioning device 20;

[0045] Furthermore, the hydraulic cylinder 232 in the middle of the load-bearing plate 231 is activated, driving the first connecting plate 233, the two connecting rods 234 and the second connecting plate 235 to move away from the carbon fiber ribs 30 and begin tensioning. At the same time, the motor 243 is activated, driving the screw-tightening tube 244 to tighten the nut.

[0046] Furthermore, by monitoring the data transmitted by the pressure sensor 237, when the tensioning pressure reaches the set value, the hydraulic cylinder 232 retracts, the motor 243 stops running, and then the tensioning device 20 is removed.

[0047] Please refer to the appendix carefully. Figure 1 , 5 As shown in Figures 6 and 7, the stabilizing device 40 includes an Ω-shaped bracket 41, second bolt holes 42 on both sides of the Ω-shaped bracket 41, and a semi-cylindrical groove 43 inside the Ω-shaped bracket 41.

[0048] It should be noted that the Ω-shaped bracket 41 is a thickened bracket, the inner diameter of the semi-cylindrical groove 43 is the same as the outer diameter of the sleeve 32, and the surface of the semi-cylindrical groove 43 is rough to prevent the sleeve 32 from rotating.

[0049] Furthermore, holes are pre-drilled on the surface of the reinforced concrete beam at the locations where the Ω-shaped bracket 41 needs to be installed;

[0050] Furthermore, the semi-cylindrical groove 43 is fitted onto the sleeve 32, and the Ω-shaped bracket 41 is fixed to the surface of the reinforced concrete beam slab through the chemical screw and the second bolt hole 42.

[0051] According to the above embodiments, a method for reinforcing reinforced concrete beams and slabs with carbon fiber reinforcement will also be provided, including the following steps:

[0052] Step 1: Surface treatment of the reinforcement location: Remove the plaster and protective concrete layer from the surface of the reinforced concrete beam and slab where reinforcement is required, grind the uneven parts of the surface, and seal the wider cracks with sealant.

[0053] Step 2, carbon fiber reinforcement pre-assembly: Insert both ends of the carbon fiber reinforcement strip 30 into the fixed end bracket 11 and the tensioning end bracket 12 respectively. Adjust the length of both ends of the carbon fiber reinforcement strip 30 with nuts according to the reinforcement length.

[0054] Step 3: Install the two end supports: Drill holes in the reinforced concrete beam slab according to the positions of the fixed end support 11 and the tensioning end support 12 and the corresponding positions of the first bolt holes 111 inside them, and fix the fixed end support 11 and the tensioning end support 12 to the concrete beam slab with chemical bolts.

[0055] Step 4: Tensioning the carbon fiber reinforcement: The tensioning device 20 is fitted onto the tensioning end bracket 12. The snap-fit ​​component 22 is used to prevent displacement. The carbon fiber reinforcement 30 is tensioned by the tensioning component 23. The tensioned carbon fiber reinforcement 30 is pre-fixed by the nut tightening component 24.

[0056] Step 5: Install the reinforcing cover plate: Based on the position of the sleeve 32 on the tensioned carbon fiber reinforcement strip 30 and the distribution of the second bolt holes 42 on the stabilizing device 40, drill holes in the reinforced concrete beam slab, and use chemical bolts to fit the stabilizing device 40 onto the sleeve 32 and fix it to the reinforced concrete beam slab.

[0057] The working principle of this invention is as follows:

[0058] All electrical components in this invention are triggered to operate by a PLC controller, the PLC controller model being "FX3U-16MR".

[0059] First, before installing the reinforcement device, the surface of the reinforced concrete beam / slab at the location to be reinforced is pre-treated. Two sleeves 32 are respectively fitted into two threaded rods 31. The threaded rods 31 at both ends of the carbon fiber reinforcement strip 30 are respectively fitted into the fixed end bracket 11 and the tensioning end bracket 12 through the reinforcement strip holes 123. The insertion length of the threaded rods 31 is adjusted using nuts according to the reinforcement length. Holes are drilled at corresponding positions on the surface of the reinforced concrete beam / slab, and the fixed end bracket is secured using chemical screws and the first bolt hole 111. The frame 11 and tensioning end support 12 are installed on the surface of the reinforced concrete beam slab. Then, the pull rod 241 is pulled out along the guide hole 211 by the handle 242, causing the spring 245 to contract. The motor 243 and the screw tube 244 shift towards the handle 242, and the mounting shell 21 is put over the tensioning end support 12. At this time, the second groove 212 is fitted onto the threaded rod 31, all the third grooves 221 are fitted onto the protrusions 121, and the fourth groove 236 is fitted onto the carbon fiber reinforcement strip 30 and abuts against the sleeve 32. The handle 242 is then released. Spring 245 rebounds, pushing motor 243 and screw tube 244 forward until screw tube 244 is fitted onto the nut of fixed threaded rod 31, causing handle slider 223 to slide out of slide groove 222 until handle slider 223 is engaged in rectangular groove 224, completing the fixation of tensioning device 20. Next, hydraulic cylinder 232 in the middle of support plate 231 is activated, driving first connecting plate 233, two connecting rods 234 and second connecting plate 235 to move away from carbon fiber reinforcement 30, initiating tensioning. Simultaneously, the motor 243 starts, driving the screw tube 244 to tighten the nut. By monitoring the data transmitted by the pressure sensor 237, when the tension pressure reaches the set value, the hydraulic cylinder 232 retracts, the motor 243 stops running, and then the tensioning device 20 is removed. Finally, holes are pre-drilled on the surface of the reinforced concrete beam at the location where the Ω-shaped bracket 41 needs to be installed, the semi-cylindrical groove 43 is fitted onto the sleeve 32, and the Ω-shaped bracket 41 is fixed to the surface of the reinforced concrete beam through the chemical screws and the second bolt hole 42.

[0060] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A carbon fiber reinforcement device for reinforced concrete beams and slabs, comprising a support device (10), a tensioning device (20), carbon fiber reinforcing bars (30), and a stabilizing device (40), characterized in that, The support device (10) includes a fixed end support (11) and a tensioning end support (12) aligned by a bolting and anchoring process. The tensioning device (20) is fitted onto the tensioning end support (12). The tensioning device (20) includes a mounting shell (21), snap-fit ​​components (22) built into the shell plates at both ends of the mounting shell (21), a pull bar component (23) located at the bottom of the mounting shell (21), and a screw nut component (24) located inside the mounting shell (21). The mounting shell (21) includes a guide hole (211) at one end and a second groove (212) at the other end of the mounting shell (21). The snap-fit ​​component (22) includes four third grooves (221) at both ends of the mounting shell (21), a sliding groove (222) on one side of the third groove (221), a slider (223) with a handle that is slidably disposed inside the sliding groove (222), and a rectangular groove (224) disposed in the third groove (221) away from the sliding groove (222). The pull bar component (23) includes a load-bearing plate (231) at the bottom of the mounting shell (21), a hydraulic cylinder (232) in the middle of the load-bearing plate (231), a first connecting plate (233) at the actuating end of the hydraulic cylinder (232), two connecting rods (234) bolted to both sides of the first connecting plate (233), a second connecting plate (235) bolted to the other end of the two connecting rods (234), a fourth groove (236) at the top of the second connecting plate (235), and a pressure sensor (237) at the edge of the fourth groove (236). The nut tightening component (24) includes a pull rod (241) passing through the guide hole (211), a handle (242) located at one end of the pull rod (241) away from the mounting housing (21), a motor (243) located at the other end of the pull rod (241), a screw tightening tube (244) located at the actuating end of the motor (243), and a spring (245) with one end abutting against the inner wall of the mounting housing (21) and the other end abutting against the bottom of the motor (243).

2. The carbon fiber reinforcement device for reinforced concrete beams and slabs according to claim 1, characterized in that: The tensioning end support (12) has two protrusions (121) aligned at both ends, a first groove (122) in the middle of one end of the tensioning end support (12), and a rib hole (123) in the center of the other end.

3. The carbon fiber reinforcement device for reinforced concrete beams and slabs according to claim 1, characterized in that: The carbon fiber reinforcing bar (30) includes threaded rods (31) at both ends, and sleeves (32) threadedly connected to the threaded rods (31).

4. The carbon fiber reinforcement device for reinforced concrete beams and slabs according to claim 1, characterized in that: The stabilizing device (40) includes an Ω-shaped bracket (41), second bolt holes (42) on both sides of the Ω-shaped bracket (41), and a semi-cylindrical groove (43) inside the Ω-shaped bracket (41).

5. A carbon fiber reinforcement device for reinforced concrete beams and slabs according to claim 1, characterized in that: The fixed end bracket (11) and the tensioning end bracket (12) are steel U-shaped frames, and there are several first bolt holes (111) at the bottom of the fixed end bracket (11) and the tensioning end bracket (12).

6. A reinforcement method for a carbon fiber reinforcement device for reinforced concrete beams and slabs according to any one of claims 1-5, characterized in that: Includes the following steps: Step 1: Surface treatment of the reinforcement location: Remove the plaster and protective concrete layer from the surface of the reinforced concrete beam and slab where reinforcement is required, grind the uneven parts of the surface, and seal the wider cracks with sealant. Step 2, pre-assembly of carbon fiber reinforcement: Insert both ends of the carbon fiber reinforcement strip (30) into the fixed end bracket (11) and the tensioning end bracket (12) respectively. Adjust the length of both ends of the carbon fiber reinforcement strip (30) with nuts according to the reinforcement length. Step 3: Install the two end supports: Drill holes in the reinforced concrete beam slab according to the positions of the fixed end support (11) and the tensioning end support (12) and the corresponding positions of the first bolt holes (111) inside them, and fix the fixed end support (11) and the tensioning end support (12) to the concrete beam slab with chemical bolts. Step 4: Tensioning the carbon fiber reinforcement: The tensioning device (20) is placed on the tensioning end bracket (12), and the offset is prevented by the snap-fit ​​component (22). The carbon fiber reinforcement (30) is tensioned by the tensioning component (23), and the tensioned carbon fiber reinforcement (30) is pre-fixed by the nut tightening component (24). Step 5: Install the reinforcing cover plate: Based on the position of the sleeve (32) on the tensioned carbon fiber reinforcing bar (30) and the distribution of the second bolt holes (42) on the stabilizing device (40), drill holes in the reinforced concrete beam slab, and use chemical bolts to put the stabilizing device (40) on the sleeve (32) and fix it to the reinforced concrete beam slab.

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