Reinforcement structure of composite floor slab and reinforcement method of composite floor slab

Abstract

The present invention discloses a reinforcement structure for a composite floor slab and a method for reinforcing a composite floor slab. The composite floor slab includes at least two floor slabs arranged overlappingly. The reinforcement structure includes at least one perforation penetrating the composite floor slab in the thickness direction of the composite floor slab; at least one cable, each cable is penetrated and arranged in a corresponding perforation, and both ends of each cable extend out of both ends of the perforation. Each cable is formed by stacking a plurality of fiber cloth strips together and then twisting them in a twisting manner. Each cable is adhesively bonded to the inner wall of the corresponding perforation by structural adhesive, and the fiber cloth strips in the part of each cable located in the perforation are also adhesively bonded together by structural adhesive; and, both ends of each cable are respectively fixed to the surface of the corresponding side floor slab in a manner that the ends of the fiber cloth strips are dispersed from each other. The reinforcement structure has the advantages of simple raw materials, environmental protection and energy saving, and good reinforcement effect, and has relatively high overall stability.

Description

Technical Field

[0001] The present invention relates to the technical field related to construction, and particularly relates to a reinforcement structure for a composite floor slab and a method for reinforcing a composite floor slab. Background Art

[0002] In the technical field of construction engineering, a composite floor slab is a common building structure, which is composed of upper and lower two layers of plates combined by an adhesive material, and has the advantages of high strength, light weight, and convenient construction. However, due to improper construction quality control or the influence of environmental factors, the composite floor slab may have a hollowing phenomenon during use, that is, the combination between the upper and lower two layers of plates is poor or there is local void, which will lead to a decrease in the structural bearing capacity and limited use function.

[0003] To solve the hollowing phenomenon of the composite floor slab, the existing technical solutions mainly adopt the chemical grouting method or the physical reinforcement method. The chemical grouting method is to inject chemical slurry into the holes after opening holes in the floor slab, so that the slurry penetrates into the interior of the floor slab, thereby achieving the effect of filling the hollow and enhancing the bonding. The physical reinforcement method is to paste steel plates or steel bars on the surface of the floor slab to improve the strength and stability of the floor slab.

[0004] The chemical grouting method needs to strictly control the injection volume and flow direction of the slurry to avoid problems such as uneven grouting or over-grouting. Although the physical reinforcement method can improve the strength of the floor slab, it will increase the weight and volume of the floor slab, and at the same time, it will also affect the aesthetics and use function of the floor slab. In addition, both of these methods require a large number of construction personnel and equipment, with high costs and long construction periods. Therefore, the existing technical solutions have certain limitations in practical applications, and it is necessary to find more effective and economical reinforcement structures and reinforcement methods. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems that the composite floor slabs reinforced by the chemical grouting method and the physical reinforcement method in the prior art have relatively large limitations and poor reinforcement effects.

[0006] To solve the above technical problems, an embodiment of the present invention discloses a reinforcement structure for a composite floor slab. The composite floor slab includes at least two floor slabs arranged overlappingly, and the reinforcement structure includes:

[0007] At least one through hole penetrating the composite floor slab along the thickness direction of the composite floor slab;

[0008] At least one cable, each cable is disposed through a corresponding through hole, and both ends extend out of both side ends of the through hole; wherein

[0009] Each cable is formed by stacking a number of fiber cloth strips together and then twisting them in a spiral manner. Each cable is bonded to the inner wall of the corresponding perforation by structural adhesive, and the fiber cloth strips in the part of each cable located within the perforation are also bonded together by structural adhesive; moreover, both ends of each cable are respectively fixed to the floor surface on the corresponding side in a manner that the ends of the fiber cloth strips are dispersed from each other.

[0010] With the above technical solution, the present invention provides a reinforcement structure for a composite slab. Compared with traditional chemical reinforcement methods or physical reinforcement methods, the construction steps of this reinforcement structure are simpler, and it has the advantages of simple raw materials, environmental protection, energy conservation, and good reinforcement effect. The tension of the cables can be evenly distributed inside the floor slab, avoiding local stress concentration, and the ends are dispersed by the remaining fiber cloth strips, improving the overall stability of the structure, dispersing the stress and tension received by the cables, avoiding stress concentration, thereby improving the reinforcement effect of the cables on the composite floor slab, and having high shear resistance. The overall stability of the composite floor slab reinforcement structure is relatively high. Also, each cable is bonded to the inner wall of the perforation by structural adhesive, and the fiber cloth strips of the cable located within the perforation are also bonded together by structural adhesive, with high connection strength, better resistance to stress and reinforcement effect.

[0011] Further preferably, a fiber cloth fixing device is provided at one end of the perforation. The fiber cloth fixing device includes an integrally formed connecting end and a fixing disk; wherein

[0012] The connecting end is cylindrical, with an outer diameter adapted to the inner diameter of the perforation and a through hole extending parallel to the perforation provided inside;

[0013] The fixing disk is arranged around the end of the connecting end away from the composite floor slab, and includes a joint part and a fixing part arranged in sequence along the radial direction. The fixing part surrounds the joint part and includes a plurality of fixing holes arranged circumferentially; and

[0014] One end of the connecting end extending into the perforation has its outer wall in contact with the inner wall of the perforation, and the fixing part abuts against the floor surface on the circumferential side of the perforation. The corresponding end of the cable extends out of one end of the perforation through the through hole, and the ends of the fiber cloth strips pass around the joint part and penetrate into the corresponding fixing holes, and are fixed flat on the floor surface on the corresponding side of the composite floor slab in a manner that they are dispersed from each other.

[0015] Further preferably, the plurality of fixing holes are arranged on the fixing part in a circumferentially evenly distributed manner; and

[0016] The ends of the fiber cloth strips at both ends of the cable are fixed to the floor surface on the corresponding side in a manner that they are dispersed from each other at evenly spaced intervals around the perforation.

[0017] Further preferably, a plurality of perforations are spacedly formed in the composite floor slab, and a cable is filled in each perforation; the apertures of the plurality of perforations are the same, and the aperture of each perforation is in the range of 10 to 80 mm;

[0018] The thickness of each fiber strip is in the range of 0.1 mm to 0.2 mm, and the cable is formed by stacking and twisting a plurality of fiber strips; and

[0019] The aperture of each perforation is larger than the total thickness dimension of all the fiber strips of the cable filled therein, and the dimension difference between the two is in the range of 3 to 5 mm.

[0020] Further preferably, each fiber strip is formed by combining a fiber material, a matrix material, and a reinforcing agent; wherein

[0021] The fiber material includes any one of carbon fiber, glass fiber, polyimide fiber, silicon carbide fiber, ceramic fiber, and metal fiber;

[0022] The matrix material is coated on the outer layer of the fiber material as an adhesive or a protective layer, and includes one of epoxy resin, acrylic resin, polyurethane, and phenolic resin;

[0023] The reinforcing agent is coated on the outer periphery of the fiber strip and includes at least one of an anti-ultraviolet agent and an antioxidant.

[0024] The embodiment of the present invention also discloses a reinforcement method for a composite floor slab, which is used to form a reinforcement structure of the composite floor slab. The method includes:

[0025] S1. Open perforations in the composite floor slab, and the perforations penetrate through the composite floor slab along the thickness direction of the composite floor slab;

[0026] S2. Stack a plurality of fiber strips together and then twist them together in a twisting manner to form a cable. Pass the cable through the perforation of the composite floor slab, and the several fiber cloths of the cable located in the perforation are wound around each other, and both ends of the cable extend out of both ends of the perforation; wherein, the length of the cable is greater than the thickness of the composite floor slab, and the radial cross-sectional area of the cable is equal to or less than the cross-sectional area of the perforation;

[0027] S3. Pull both ends of the cable on both sides of the composite floor slab and apply a pulling force to the cable along the length direction of the cable;

[0028] S4. Pour structural adhesive into the perforation from at least one end of the perforation so that the cable is bonded to the inner wall of the perforation, and release the pulling force after the structural adhesive solidifies;

[0029] S5. Fix both ends of the cable to the floor surface on the corresponding side in a manner that the ends of the respective fiber strips are dispersed from each other;

[0030] S6. Inspect and accept the composite floor slab.

[0031] Adopting the above technical solution, the present invention discloses a new reinforcement method for composite floor slabs. After perforating the composite floor slab, a scheme of using multiple fiber strips to be twisted into a cable and then passing through the holes for reinforcement is adopted. Compared with traditional reinforcement methods (such as adding concrete beams or steel beams), the construction steps are simpler and there is no need for large-scale destructive construction. It has the advantages of good filling effect for the perforations and better reinforcement effect on the composite floor slab. And because the cable is made by twisting fiber strips, it has the advantages of simple raw materials and good reinforcement effect. The material cost required for the fiber strip cable reinforcement scheme is relatively low, the construction efficiency is high, and it has the advantages of environmental protection and energy conservation. This reinforcement scheme is applicable to perforations of different sizes and shapes and can flexibly meet various reinforcement requirements.

[0032] Furthermore, fiber strips are used, taking advantage of their good ductility, and are thus cleverly applied in the field of floor slab reinforcement. And in combination with structural adhesive, it further improves the bonding effect between the cable in the hole and the inner wall of the hole. Fiber strips have the characteristics of light weight and high strength, so that the weight of the reinforced structure increases limitedly, while significantly improving the bearing capacity of the structure. And fiber materials usually have good corrosion resistance and can maintain stable performance in harsh environments such as humidity and corrosion for a long time.

[0033] Particularly importantly, in the reinforcement method disclosed in the present application, during the reinforcement process, a tensile force needs to be applied to the cable. By applying the tensile force, the reinforcement effect on the composite floor slab is achieved. And in combination with structural adhesive, it can enhance the bonding strength, improve the durability and stability, further strengthen the advantages of fiber strips. Moreover, the structural adhesive combined with the cable can improve the overall bearing capacity of the composite floor slab. And the two ends of the cable are respectively fixed to the floor slab surface on the corresponding side in a manner that the ends of each fiber strip are dispersed from each other. The tension of the cable can be evenly distributed inside the floor slab, avoiding local stress concentration. And the ends are dispersed by the remaining fiber strips, improving the overall stability of the structure, dispersing the stress and tensile force received by the cable, and thus improving the reinforcement effect of the cable on the composite floor slab.

[0034] Further preferably, when pulling the two ends of the cable on both sides of the composite floor slab, a tensile force is applied to the corresponding ends of each fiber strip at each end of the cable. The direction of the tensile force is consistent with the length direction of the cable and is towards the side away from the composite floor slab. And while applying a tensile force to the cable, a torsional force around the length direction is also applied to at least one end of the cable.

[0035] With the above technical solution, when tensile forces are applied to each fiber cloth strip at each end of the cable, these tensile forces will be evenly transmitted to the composite floor slab, thereby enhancing its load-bearing capacity and helping to disperse the internal stress of the floor slab to a larger area, improving the overall stability of the structure. The tensile force of the cable can significantly increase the stiffness of the composite floor slab, reducing its deformation when subjected to loads. Further, by simultaneously pulling the cables on both sides of the composite floor slab, it can ensure a more uniform stress distribution within the floor slab, avoid stress concentration, and extend the lifespan of the structure. Further, applying a torsional force can improve the shear resistance of the composite floor slab. The cable under the action of the torsional force can better form an integral whole with the internal structure of the floor slab, improving the overall stability of the structure, and the application of the torsional force can optimize the stress state within the composite floor slab. Description of the Drawings

[0036] Figure 1 Schematic diagram of a composite floor slab with multiple perforations in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0037] Figure 2 Cross-sectional view of the composite floor slab in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0038] Figure 3 Schematic diagram of a cable passing through a perforation in the composite floor slab in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0039] Figure 4 Another schematic diagram of a cable passing through a perforation in the composite floor slab in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0040] Figure 5 Schematic diagram of the cable in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0041] Figure 6 Another structural schematic diagram of the cable in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0042] Figure 7 Structural schematic diagram of the fiber cloth fixing device in the reinforcement structure of the composite floor slab provided by an embodiment of the present invention;

[0043] Figure 8 Method flow chart of the reinforcement method for the composite floor slab provided by an embodiment of the present invention;

[0044] Figure 9 Method flow chart of drilling holes in the composite floor slab in the reinforcement method for the composite floor slab provided by an embodiment of the present invention.

[0045] Description of the Reference Numerals:

[0046] 100, Composite floor slab;

[0047] 110. Perforation;

[0048] 200. Cable;

[0049] 210. Fiber cloth strip;

[0050] 300. Fiber cloth fixing device;

[0051] 310. Connection end;

[0052] 311. Through hole;

[0053] 320. Fixed plate;

[0054] 321. Fixing hole;

[0055] 400. Prestressed tensioning device. Detailed implementation manner

[0056] As mentioned in the background art of the present invention, the composite floor slab is a common building structure in the field of construction engineering. During the use process, the firmness of the composite floor slab is often poor, and the phenomenon of hollowing is likely to occur. In the prior art, the solutions to the hollowing phenomenon of the composite floor slab generally involve reinforcement by chemical grouting or physical reinforcement methods, but both have limitations. For example, when using the chemical grouting method, it is necessary to strictly control the injection volume and flow direction of the grout. However, the greater limitation of using the chemical grouting method is that it can only fill the hollow between the composite floor slabs, and it is difficult to further reinforce the composite floor slab. Moreover, the chemical grouting method has relatively strict construction requirements. When using the physical reinforcement method, generally, the weight and volume of the floor slab will be increased, and the construction difficulty is large, with high technical requirements and a large number of construction personnel and equipment required. Therefore, the floor slab structures reinforced by the chemical grouting method and the physical reinforcement method in the prior art both have problems of relatively large limitations and defects.

[0057] The present invention provides a new reinforcement structure and method for a composite floor slab. The reinforcement method involves drilling holes in the composite floor slab, then filling the perforations with cables formed by twisting fiber cloth strips. After the cables are formed in the perforations, prestress and rotational force are applied, and they are reinforced with structural adhesive. Finally, the ends of the fiber cloth strips are further fixed on both sides of the composite floor slab. Utilizing the advantages of good ductility and high strength of the fiber cloth strips and twisting them into a cable shape to have higher strength, and after fixing and reinforcing the perforations with structural adhesive, the problems of hollowing and poor structural strength of the composite floor slab are solved. And then, the fiber cloth strips are flattened and reinforced at the ends, basically without changing the structure of the composite floor slab, having the advantages of low cost, stable structure, and wide application range.

[0058] Each fiber cloth strip used in the reinforcement structure disclosed in this embodiment is formed by combining a fiber material, a matrix material, and a reinforcing agent. The fiber material includes any one of carbon fiber, glass fiber, polyimide fiber, silicon carbide fiber, ceramic fiber, and metal fiber. The matrix material is coated on the outer layer of the fiber material as an adhesive or a protective layer, and includes one of epoxy resin, acrylic resin, polyurethane, and phenolic resin. The reinforcing agent is coated on the outer periphery of the fiber cloth strip and includes at least one of an anti-ultraviolet agent and an antioxidant. For example, the fiber material is carbon fiber, the matrix material is acrylic resin, and the reinforcing agent is an anti-ultraviolet agent; or the fiber material is glass fiber, the matrix material is polyurethane, and the reinforcing agent is an anti-ultraviolet agent, etc.

[0059] Further, taking each fiber cloth strip as a carbon fiber cloth strip as an example for illustration, carbon fiber is made by high-temperature carbonization of raw materials such as polyacrylonitrile (PAN) fiber, pitch-based fiber, or viscose-based fiber, and has the characteristics of high strength and high modulus. The matrix material is a polymer such as epoxy resin, which serves as an adhesive and a protective layer to enhance the toughness and durability of the composite material. The reinforcing agent is an anti-ultraviolet agent, and the elastic modulus disclosed in this embodiment is about 230–300 GPa, and the elongation rate is 1.5%–2.5%. The thickness of each single-layer carbon fiber cloth is selected in the range of 0.1 mm to 0.3 mm. For example, single-layer cloths with a thickness of 0.1 mm, 0.167 mm, or 0.3 mm are selected, and the width of the carbon fiber cloth is preferably set in the range of 100–300 mm, and the density is 1.8 g / cm³. Those skilled in the art can also adjust other parameters of the carbon fiber cloth according to actual needs, and this embodiment does not make specific limitations on this.

[0060] Moreover, it should be noted that the composite floor slab can be a wooden composite floor slab, a reinforced concrete structure composite floor slab, a fiber cement board composite floor slab, a floor slab of other structures or materials, etc., and this embodiment does not make specific limitations on this.

[0061] Next, a more detailed and specific explanation of the reinforcement structure of the composite floor slab disclosed in the present invention will be given:

[0062] The implementation manner of this embodiment discloses a reinforcement structure for a composite floor slab. Please refer to Figure 1 and Figure 2 , the composite floor slab 100 includes at least two floor slabs arranged overlappingly. In this embodiment, two floor slabs are taken as an example for illustration, but those skilled in the art should understand that this method can also be applied to composite floor slabs with 3 layers, 4 layers, or even more layers. This embodiment does not make a unique limitation on this.

[0063] The reinforcement structure includes: at least one perforation 110 penetrating through the composite floor slab 100 along the thickness direction of the composite floor slab 100. Please refer to Figure 1 and Figure 2, in a preferred implementation disclosed in this embodiment, a plurality of through holes 110 are spacedly provided on the upper surface of the composite floor slab 100. When the through holes 110 are formed in the composite floor slab 100, in this embodiment, preferably more through holes 110 are provided at positions near the edge on the peripheral side of the composite floor slab 100, and fewer through holes 110 are provided in the middle of the composite floor slab 100, so as to optimize the structural performance of the composite floor slab 100, give priority to the reinforcement effect of the edge part of the composite floor slab 100, and improve the construction convenience.

[0064] Please refer to Figure 3 and Figure 4 , the reinforcement structure further includes at least one cable 200, and each cable 200 is disposed through a corresponding through hole 110, and both ends extend out of the two side ends of the through hole 110. Specifically, in this embodiment, the number of cables 200 corresponds to the number of through holes 110.

[0065] Each cable 200 is formed by stacking a plurality of fiber cloth strips 210 together and then twisting them in a screwed manner, and both ends of each cable 200 are fixedly attached to the floor surface on the corresponding side in a manner that the ends of the respective fiber cloth strips 210 are dispersed from each other. Please refer to Figure 5 and Figure 6 , taking the example that each cable 200 is provided with 4 fiber cloth strips 210, the 4 fiber cloth strips 210 are stacked together and then twisted in a screwed manner to form the cable 200. Then, the cable 200 is turned over to the side close to the floor surface at both ends of the through hole 110 and fixedly attached to the floor surface on the corresponding side in a dispersed manner. The direction of each fiber cloth strip 210 of the cable 200 when it is turned over and pasted on one side of the floor is as shown in Figure 5 . During the process of turning over and pasting the fiber cloth strips 210, the fiber cloth strips 210 located on the upper surface of the composite floor slab 100 are turned downwards and laid flat and dispersedly bonded to the upper surface of the composite floor slab 100, and the fiber cloth strips 210 on the lower surface of the composite floor slab 100 are turned upwards and laid flat and dispersedly bonded to the lower surface of the composite floor slab 100. The schematic diagram of the cable 200 after being dispersed and laid flat is as shown in Figure 6 .

[0066] More specifically, each cable 200 is adhesively bonded to the inner wall of the corresponding perforation 110 with structural adhesive, and the fiber strips 210 in the part of each cable 200 located within the perforation 110 are also adhesively bonded together with structural adhesive. For example, each cable 200 is composed of 4 fiber strips 210, and the 4 fiber strips 210 in the part located within the perforation 110 are fixedly bonded together with structural adhesive. Moreover, each cable 200 is adhesively bonded to the inner wall of the corresponding perforation 110 with structural adhesive. Through such a connection method and structure, the connection strength between the cable 200 and the composite floor slab 100 is higher, and the connection strength of the fiber strips 210 constituting the cable 200 is also higher.

[0067] A fiber cloth fixing device 300 is provided at one end of the perforation 110. Please refer to Figure 7 , the fiber cloth fixing device 300 includes an integrally formed connection end 310 and a fixing disk 320. The connection end 310 is cylindrical, with an outer diameter adapted to the inner diameter of the perforation 110, and a through hole 311 parallel to the perforation 110 is provided inside. The fixing disk 320 is disposed around the end of the connection end 310 away from the composite floor slab 100, and includes a joint part and a fixing part arranged radially in sequence. The fixing part is arranged around the joint part and includes a plurality of fixing holes 321 arranged circumferentially. The number of fixing holes 321 on the fixing disk 320 matches the number of fiber strips 210 of the cable 200. For example, when 4 fiber strips 210 are provided, preferably 4 fixing holes 321 are provided; when 5 fiber strips 210 are provided, preferably 5 fixing holes 321 are provided, etc. This embodiment does not make specific limitations in this regard. And in this embodiment, the fixing holes 321 are preferably provided as a plurality of fan-shaped holes surrounding the connection end 310.

[0068] One end of the connection end 310 extending into the perforation 110 has an outer wall that fits with the inner wall of the perforation 110, and the fixing part abuts against the floor surface on the circumferential side of the perforation 110. The corresponding end of the cable 200 extends out of one end of the perforation 110 through the through hole, and the ends of the fiber strips 210 bypass the joint part and penetrate into the corresponding fixing holes 321, and are laid and fixed on the floor surface on the corresponding side of the composite floor slab 100 in a dispersed manner.

[0069] Furthermore, because one end of the fiber cloth fixing device 300 in this embodiment is fixed on the floor surface on one side of the composite floor slab 100, and the ends of the fiber strips 210 are fixed on the fiber cloth fixing device 300, it is possible to fix one end of the cable 200 to the floor surface on one side of the composite floor slab 100 by using the fiber cloth fixing device 300. More specifically, please refer to Figure 7, the fiber cloth fixing device 300 disclosed in this embodiment includes an integrally formed connecting end 310 and a fixing disk 320. The connecting end 310 is arranged in a cylindrical shape, and the outer diameter of the connecting end 310 is adapted to the inner diameter of the perforation. A through hole 311 extending parallel to the perforation 110 is provided inside the connecting end 310. The fiber cloth strip 210 can pass through the through hole 311 of the connecting end 310 and then be fixed on the fixing disk 320. The outer diameter of the fixing disk 320 is larger than the outer diameter of the connecting end 310. When fixing the fiber cloth fixing device 300, the connecting end 310 is inserted into the perforation 110. Since the outer diameter of the fixing disk 320 is larger than the outer diameter of the connecting end 310, and the end of the fiber cloth strip 210 is fixed on the fixing disk 320, when the other end of the fiber cloth strip 210 is pulled by the prestressing tensioning device 400 to apply prestress, the fixing disk 320 abuts against the corresponding side of the composite floor slab 100 and provides a reaction force opposite to the tension provided by the prestressing tensioning device 400, so that the cable 200 located in the perforation 110 is tightened.

[0070] When the fiber cloth fixing device 300 is installed in the perforation 110, each fiber cloth strip 210 can first pass through the through hole 311 of the connecting end 310, and then the end of the fiber cloth strip 210 can be fixed on the fixing disk 320, for example, by winding, tying, clamping or other means at the end of the fixing disk 320. See Figure 7 , a plurality of fixing holes 321 are provided on the fixing disk 320 of the fiber cloth fixing device 300 disclosed in this embodiment. When fixing the cable 200, each fiber cloth strip 210 first passes through the perforation 110, then through the through hole 311 of the connecting end 310, and then turns up and passes through one of the fixing holes 321 of the fixing disk 320 for fixing. To improve the connection strength, after the fiber cloth strip 210 turns up and passes through the fixing hole 321, it can be wound several times, or tied to the fixing hole 321 during winding, and the end should also extend out of the fixing hole 321 to prepare for subsequent fixing on the floor surface.

[0071] For example, taking the cable 200 including 4 fiber strips 210 and the fixing plate 320 having 4 fixing holes 321 as an example for illustration: Each fiber strip 210 first passes through the through hole 110 of the composite floor slab 100, then passes through the through hole 311 of the connecting end 310, and then turns up and passes through the end of one of the fixing holes 321 of the fixing plate 320 for fixation. Moreover, the fiber strip 210 also extends outside the fixing hole 321. Then, align the connecting end 310 with the through hole of the composite floor slab 100. Lift the cable 200 at the other end of the cable 200, insert the connecting end 310 into the through hole 110, and the fixing plate 320 abuts and contacts the floor surface around the through hole 110. It should be noted that the fixing methods and means for the fiber strip 210 to be fixed at the end of the fixing plate 320 after passing through the through hole 110 can be adjusted and designed by those skilled in the art according to actual needs, and this embodiment does not make a unique limitation on this. Further, the process of the fiber strip 210 passing through the through hole 110 and being fixed by the fiber cloth fixing device 300 is as Figure 4 shown. After removing the prestressed tensioning device 400, it is as shown in the right half of Figure 4 . Then, the fiber strip 210 can be fixedly pasted on the floor surface.

[0072] Moreover, in this embodiment, since a part of the cable 200 near one end of the fiber cloth fixing device 300 is located in the through hole 311 of the connecting end 310, the cable 200 located in the through hole 311 does not directly contact the inner wall surface of the through hole 110 on the composite floor slab 100. The cable 200 located in the through hole 311 can be bonded to the inner wall part of the through hole 311, and the outer wall part of the connecting end 310 of the fiber cloth fixing device 300 can be bonded to the inner wall surface of the through hole by adhesive, or the outer wall part of the connecting end 310 is provided with an external thread, and an internal thread is provided on the inner wall part of the through hole 110 for threaded connection. Those skilled in the art can set it according to actual needs, and this embodiment does not make a specific limitation on this.

[0073] The reinforcement structure of the composite slab provided in this embodiment, compared with the traditional chemical reinforcement method or physical reinforcement method, has simpler construction steps, and has the advantages of simple raw materials, environmental protection and energy saving, and good reinforcement effect. The tension of the cable 200 can be evenly distributed inside the floor slab, avoiding local stress concentration, and the end part is dispersed by the remaining fiber strips 210, improving the overall stability of the structure, dispersing the stress and tension received by the cable 200, avoiding stress concentration, thereby improving the reinforcement effect of the cable 200 on the composite floor slab 100, and having higher shear resistance. The overall stability of the reinforcement structure of the composite floor slab 100 is relatively high.

[0074] Another embodiment of the present invention also discloses a reinforcement method for a composite floor slab, which is used to reinforce the reinforcement structure of the composite floor slab in any one of the foregoing items. Please refer to Figure 8 , and the method includes:

[0075] S1. Open perforations in the composite floor slab, and the perforations penetrate the composite floor slab along the thickness direction of the composite floor slab.

[0076] S2. Stack a number of fiber cloth strips together and then twist them together in a screwing manner to form a cable. The cable made of fiber cloth strips by screwing has the advantages of simple raw materials and good reinforcement effect. The material cost required for the fiber cloth strip cable reinforcement scheme is relatively low, the construction efficiency is high, and it has the advantages of environmental protection and energy saving. This reinforcement scheme is applicable to perforations of different sizes and shapes and can flexibly meet various reinforcement requirements. Pass the cable through the composite floor slab along the perforation, and several fiber cloths of the cable located in the perforation are wound around each other, and both ends of the cable extend out of both ends of the perforation; wherein, the length of the cable is greater than the thickness of the composite floor slab, and the radial cross-sectional area of the cable is equal to or less than the cross-sectional area of the perforation.

[0077] S3. Pull both ends of the cable on both sides of the composite floor slab and apply a tensile force to the cable along the length direction of the cable. By applying the tensile force, the cable can bear a part of the load of the floor slab, thereby improving the overall bearing capacity of the composite floor slab. The tension of the cable can be evenly distributed inside the floor slab, avoiding local stress concentration and improving the overall stability of the structure. The reinforcement effect of the cable can significantly increase the stiffness of the floor slab, reduce its deformation when subjected to load, and improve the anti-deformation ability of the structure. By adjusting the tension of the cable, the reinforcement of different areas of the floor slab can be realized, improving the pertinence and effectiveness of the reinforcement.

[0078] S4. Pour structural adhesive into the perforation from at least one end of the perforation so that the cable is bonded to the inner wall of the perforation, and release the tensile force after the structural adhesive solidifies. The structural adhesive can firmly paste the fiber cloth strips on the floor slab to form a tight protective layer, which not only enhances the bonding strength between the fiber cloth strips and the floor slab, but also improves the cooperative working ability between the cable and the floor slab. The structural adhesive has excellent anti-aging performance and can maintain stable performance during long-term use. Using the structural adhesive can simplify the construction process and reduce the complexity and workload during the construction process.

[0079] S5. Fix the two ends of the cable-stayed cable to the floor slab surface on the corresponding side in a way that the ends of each fiber cloth strip are dispersed from each other. Adopting this solution can effectively disperse the concentrated stress of the cable-stayed cable on the floor slab surface and avoid floor slab damage caused by excessive local stress. The fitting and fixing of the fiber cloth strip to the floor slab surface increases the connection area between the cable-stayed cable and the floor slab, thereby improving the strength and stability of the connection. The method of fitting and fixing with fiber cloth strips is more convenient and faster in construction compared to traditional methods such as welding or bolt connection. The method of fitting and fixing with fiber cloth strips is applicable to cable-stayed cables of various shapes and sizes, as well as floor slab surfaces of different materials.

[0080] S6. Inspect and accept the composite floor slab. When inspecting and accepting the composite floor slab, it is necessary to pay attention to whether the appearance of the reinforced floor slab meets the requirements, whether the quality strength meets the design requirements and national standards, and ensure that there are no obvious defects.

[0081] More specifically, please refer to Figure 9 , in step S1, the method of drilling holes in the composite floor slab further includes:

[0082] S10. Determine the drilling position;

[0083] S11. Select the drilling tool;

[0084] S12. Fix the drilling position;

[0085] S13. Drill the hole;

[0086] S14. Clean the hole.

[0087] Specifically, refer to Figure 9 , first, according to the design requirements, determine the position of the carbon cloth perforation. Usually, it is necessary to avoid the area with dense steel bars or the position that has a greater impact on the structural safety. Use a steel bar detector (such as a radar scanner or a magnetic detector) to detect the distribution of steel bars inside the floor slab, mark the position of the steel bars, and ensure that the drilling will not damage important steel bars. The damage of steel bars will significantly reduce the bearing capacity of the floor slab. After detecting with the detector, adjust the drilling position. If it is necessary to drill in the area with dense steel bars, it is necessary to confirm with the structural designer. When selecting the drilling tool, the tool can be selected according to the size of the perforation. For example, when the diameter of the hole to be perforated is within 10 - 50 mm, a handheld electric hammer or electric drill can be selected. When the diameter of the hole to be perforated is 50 mm and above and precise drilling is required, a drilling machine such as a water drilling machine can be selected. The drill bit can be a diamond drill bit or an alloy drill bit to ensure high cutting efficiency and smooth hole edges.

[0088] When fixing the drilling position, tape or marking tools can be attached to the drilling position to prevent slipping and clarify the drilling size. If a diamond drill is used, ensure that the equipment is fixed on the floor slab to avoid deviation during drilling. When using an ordinary electric hammer / drill for drilling: start at a low speed, gently press the drill bit, and gradually deepen the drilling. Stop to clean the debris in the hole after drilling a certain depth. When using a diamond drill: install a water cooling system to avoid overheating of the drill bit. Apply continuous and uniform pressure to ensure that the drilling depth and diameter meet the design requirements. Slow down when drilling through the floor slab to avoid damage to the hole or cracking of the bottom edge of the floor slab. Finally, use a high-pressure air gun or vacuum cleaner to clean the dust and debris in the hole to ensure that the hole is clean and ready for the subsequent process. If there is a diamond drill, ensure that there is no residual water in the hole (it can be dried with a hot air blower).

[0089] Furthermore, during the drilling process, it should be noted that the hole diameter should be slightly larger than the carbon cloth thickness, but not too large (it is recommended that the hole diameter is 3 - 5 mm larger than the total thickness of the carbon cloth) so that the bonding is uniform when grouting in the hole. The hole depth should be sufficient to ensure that the carbon cloth can pass through completely and the bottom fixing device can be installed. Ensure that the construction area is free from vibration or external interference during the construction environment to prevent the drilling equipment from shifting and control the dust diffusion (use a dust suction device or a water-cooled drill). The drilling edge may cause local cracks in the floor slab. If necessary, epoxy mortar can be applied around the hole for edge sealing treatment.

[0090] Finally, check whether the diameter, depth, and position of the perforation meet the design requirements, ensure that there is no cracking at the hole edge, the inside is clean without dust, and confirm that the carbon cloth can pass through the hole smoothly.

[0091] Furthermore, the number of fiber strips can be set to 3, 4, 5, 6, 8 or other numbers. This embodiment does not make specific limitations on this. Preferably, multiple fiber strips are perforated in a stacked manner in sequence.

[0092] As can be seen from the above, the present invention discloses a new reinforcement method for a composite floor slab. After opening perforations in the composite floor slab, a scheme of twisting multiple fiber strips into a cable and then perforating for reinforcement is adopted. Compared with traditional reinforcement methods (such as adding concrete beams or steel beams), the construction steps are simpler and there is no need for large-scale destructive construction. It has the advantages of good filling effect for perforations and better reinforcement effect on the composite floor slab.

[0093] Furthermore, by using fiber strips and applying their good ductility advantage, it is thus cleverly applied in the field of floor slab reinforcement. And in combination with structural adhesive, it further improves the bonding effect between the cable in the perforation and the inner wall of the perforation. The fiber strips have the characteristics of light weight and high strength, so that the weight increase of the reinforced structure is limited, while significantly improving the bearing capacity of the structure. And fiber materials usually have good corrosion resistance and can maintain stable performance in harsh environments such as humidity and corrosion for a long time.

[0094] Particularly importantly, in the strengthening method disclosed in the present application, during the strengthening process, a tensile force needs to be applied to the cable. After applying the tensile force, the strengthening effect on the composite floor slab is achieved. And in combination with the structural adhesive, the bonding strength can be enhanced, the durability and stability are improved, and the advantages of the fiber cloth strips are further strengthened. Moreover, the combination of the structural adhesive and the cable can improve the overall load-bearing capacity of the composite floor slab. And the two ends of the cable are respectively fixed to the floor slab surface on the corresponding side in a manner that the ends of the fiber cloth strips are dispersed from each other. The tension of the cable can be evenly distributed inside the floor slab, avoiding local stress concentration. And the ends are dispersed by the remaining fiber cloth strips, improving the overall stability of the structure, dispersing the stress and tensile force received by the cable, and thus improving the strengthening effect of the cable on the composite floor slab.

[0095] Further preferably, in step S1, after perforations are made in the composite floor slab, thread grooves are continuously formed on the inner wall surface of the perforations or roughening treatment is carried out, and the inner wall surface is cleaned. The design of the thread grooves can increase the contact area between the cable and the inner wall of the floor slab perforation, improving the connection strength and stability between the cable and the floor slab. The roughening treatment forms an uneven rough surface on the inner wall surface of the perforation, increasing the bonding area and friction force between the connecting piece and the floor slab, thereby improving the bonding force. The inner wall surface of the perforation after roughening treatment is rougher, which can better resist the erosion and wear of external forces, extend the service life, and the roughening treatment is applicable to perforations of various shapes and sizes, as well as floor slab surfaces of different materials.

[0096] In step S2, after the cable passes through the composite floor slab, at least a part of the outer peripheral surface of the cable located in the perforation does not fit and contact the inner wall surface of the perforation. The main reason for at least a part of the outer peripheral surface of the cable not fitting and contacting the inner wall surface of the perforation is to leave space for the structural adhesive to ensure that the structural adhesive can enter between the cable and the perforation for bonding and fixing. And it can also reduce friction and wear, improve the flexibility of the cable, reduce stress concentration and meet different deformation requirements. Because stress concentration usually occurs at the mutation points or joints in the structure. If the cable fits completely with the inner wall of the perforation, stress concentration may occur at these positions. By maintaining a certain gap, the stress can be dispersed over a larger area, thus reducing the risk of damage.

[0097] Furthermore, it should be noted that when several fiber cloth strips pass through the composite floor slab for perforation, the fiber cloth can be screwed into the hole through the following steps: cut the fiber cloth into strips suitable for the hole diameter, and reserve an appropriate margin for the length according to the thickness of the composite floor slab; then twist the cut carbon fiber cloth strips into a rope shape to enhance the rigidity for easy penetration into the hole, while ensuring uniformity and tightness. Finally, use a lead wire or a guide rod to pass the twisted carbon fiber cloth through the hole, making both ends expose outside the hole. Those skilled in the art can also choose other perforation methods, and this embodiment does not make specific limitations on this.

[0098] Further preferably, in step S3: when pulling both ends of the stay cables on both sides of the composite floor slab, corresponding ends of each fiber cloth strip at each end of the stay cable are applied with a tensile force, and the direction of the tensile force is consistent with the length direction of the stay cable and faces away from the composite floor slab. And while applying the tensile force to the stay cable, a torsional force around the length direction is also applied to at least one end of the stay cable.

[0099] Specifically, in step S3, corresponding ends of each fiber cloth strip at each end of the stay cable are applied with a tensile force, and the tensile forces at each end can be the same or different. For example, the tensile force at one end of each fiber cloth strip is set to 15 N. The tensile force applied to the end of the fiber cloth strip is transmitted to the internal stay cable, which can improve the overall strength of the stay cable. The tensile force of the stay cable can be dispersed to each fiber cloth strip, thereby avoiding structural damage caused by stress concentration and optimizing the stress state. Further, when applying a torsional force to the fiber cloth strip while applying the tensile force, the tensile forces applied to the fiber cloth strips on both sides of the composite floor slab act in opposite directions. For example, when applying a clockwise torsional force to the fiber cloth strip on one side of the composite floor slab, a counterclockwise torsional force is applied to the fiber cloth strip on the other side of the composite floor slab.

[0100] Further preferably, in step S4: when pouring structural adhesive into the perforations, the structural adhesive is poured into the perforations from both sides of the composite floor slab simultaneously or at time intervals. The structural adhesive fills the gap between the outer peripheral surface of the inner part of the stay cable in the perforation and the inner wall of the perforation and bonds the stay cable and the inner wall together. The structural adhesive is one of epoxy adhesive, polyurethane adhesive, and acrylate adhesive.

[0101] For example, the structural adhesive can be poured into the perforations from both sides of the composite floor slab simultaneously, or at time intervals. When pouring the structural adhesive, a glue gun can be used for injection to ensure that the structural adhesive is evenly poured into the perforations and completely wraps the fiber cloth strips. For example, when pouring the structural adhesive into the perforations from both sides of the composite floor slab, the injection interval of the structural adhesive on the same side can be 1 minute, 2 minutes, 3 minutes, etc. Those skilled in the art can design and adjust according to actual needs, and this embodiment does not make specific limitations. And, taking the pouring of epoxy resin glue as an example, the initial solidification and hardening time of the epoxy resin glue is 2 - 6 hours. During this period, the glue has started to cure and the surface has hardened, but the inside has not been completely cured. It usually takes 24 - 48 hours to be completely cured. By increasing the ambient temperature (such as using a hot air blower or an oven), the complete curing time can be shortened to 2 - 6 hours (at 60 - 80 °C). Those skilled in the art can adjust according to actual needs, and this embodiment does not make specific settings. However, during the construction process, it should be noted to avoid disturbing the fiber cloth strips during the curing of the structural adhesive, and wait until the structural adhesive is completely hardened and bonded before further processing.

[0102] Further preferably, in step S5: Each fiber cloth strip at each end of the cable is laid flat on the floor surface on the corresponding side of the composite floor slab in a manner of being evenly spaced around the perforation, and is fixedly connected to the floor surface by bonding. With this design method, the fiber cloth strips are specially treated and have a very high tensile strength. When they are laid flat on the floor surface at even intervals and fixed by bonding, they can effectively form an integral body with the floor slab to jointly bear the load, thereby improving the load-bearing capacity of the floor slab. When subjected to external forces, the floor slab can better resist deformation and damage, maintain the integrity and stability of the structure, and contribute to optimizing the stress distribution inside the floor slab.

[0103] Further preferably, in step S1: A plurality of perforations are spacedly formed in the composite floor slab, and a cable is filled in each perforation. For example, its structure can be referred to Figure 1 and Figure 2 , a plurality of perforations 110 are spacedly formed in the composite floor slab 100, the apertures of the plurality of perforations 110 are the same, and the aperture of each perforation 110 is in the range of 10 - 80 mm. For example, the apertures of each perforation 110 can be set to be the same, or can be set differently. For example, the aperture of each perforation 110 can be 10 mm, 30 mm, 50 mm, 80 mm, etc.

[0104] The thickness of each fiber cloth strip is in the range of 0.1 mm - 0.2 mm, and the cable is formed by stacking and twisting a plurality of fiber cloth strips. For example, the thickness of each fiber cloth strip is 0.1 mm, 0.15 mm, 0.2 mm, etc., and this embodiment does not make specific limitations on this. The aperture of each perforation is greater than the total thickness dimension of all the fiber cloth strips of the cable filled therein, and the dimension difference between the two is in the range of 3 - 5 mm.

[0105] Further, in the method for strengthening the composite floor slab disclosed by the present invention, in step S3:

[0106] One end of the cable is fixed to the floor surface on one side of the composite floor slab by using a fiber cloth fixing device, and the other end of the cable is pulled by using a prestressed tensioning device to apply a tensile force to the cable along the length direction of the cable. Among them:

[0107] One end of the fiber cloth fixing device is fixed to the floor surface on one side of the composite floor slab, and the ends of each fiber cloth strip at the corresponding end of the cable are joined and fixed to the other end of the fiber cloth fixing device away from the composite floor slab. And one end of the prestressed tensioning device is fixed to the floor surface on the other side of the composite floor slab, and the other end of the cable is connected to the other end of the prestressed tensioning device and can move along with the other end of the prestressed tensioning device.

[0108] Further preferably, in step S4, after the structural adhesive has solidified, the prestressed tensioning device is removed. And in step S5, the other end of the cable is fixedly attached to the floor surface on the other side of the composite floor slab in such a way that the ends of the fiber cloth strips are dispersed from each other, and the ends of the fiber cloth strips at one end of the cable are fixedly attached to the floor surface on one side of the composite floor slab in such a way that they are dispersed from each other.

[0109] Specifically, when using the fiber cloth fixing device to fix one end of the cable to the floor surface on one side of the composite floor slab, the fiber cloth fixing device fixes one end of the cable. For example, it can be fixedly connected by various methods such as surrounding, winding, gluing, binding, etc. And the fixing of the fiber cloth strip to the corresponding end of the fiber cloth fixing device should also extend out of the fiber cloth fixing device. And in one preferred implementation of this method, the fiber cloth fixing device is fixed on the floor surface and partially fixed in the perforation.

[0110] Furthermore, it should be noted that because in one implementation disclosed in this embodiment, one end of the fiber cloth fixing device is fixed on the floor surface on one side of the composite floor slab, and the end of the fiber cloth strip is fixed on the fiber cloth fixing device, it is possible to fix one end of the cable to the floor surface on one side of the composite floor slab by using the fiber cloth fixing device.

[0111] More specifically, the structure of the fiber cloth fixing device disclosed in this embodiment is as Figure 9 shown. The fiber cloth fixing device 300 includes an integrally formed connection end 310 and a fixing disk 320. The connection end 310 is arranged in a cylindrical shape. The outer diameter of the connection end 310 is adapted to the inner diameter of the perforation 110. And a through hole 311 extending parallel to the perforation 110 is opened inside the connection end 310. The fiber cloth strip 210 of the cable 200 can pass through the through hole 311 of the connection end 310 and then be fixed on the fixing disk 320. The outer diameter of the fixing disk 320 is larger than the outer diameter of the connection end 310. When fixing the fiber cloth fixing device 300, the connection end 310 is inserted into the perforation 110. Because the outer diameter of the fixing disk 320 is larger than the outer diameter of the connection end 310, and the end of the fiber cloth strip 210 is fixed on the fixing disk 320. Therefore, when the other end of the fiber cloth strip 210 is pulled by the prestressed tensioning device 400 to apply prestress, the fixing disk 320 abuts against the corresponding side part of the composite floor slab 100 and provides a reaction force opposite to the pulling force provided by the prestressed tensioning device 400 to the cable 200, so that the cable 200 located in the perforation 110 is tightened.

[0112] Further reference can be made to Figure 3 and Figure 4, when the fiber cloth fixing device 300 needs to be installed in the through hole 110, each fiber cloth strip 210 can first pass through the through hole 311 of the connection end 310, and then the end of the fiber cloth strip 210 is fixed on the fixing plate 320, for example, by means of upward flipping, winding, tying, clamping, etc. to fix it at the end of the fixing plate 320. See Figure 7 , a plurality of fixing holes 321 are provided on the fixing plate 320 of the fiber cloth fixing device 300 disclosed in one implementation manner of this embodiment. When fixing the cable 200, each fiber cloth strip 210 first passes through the through hole 110 of the composite floor slab 100, then passes through the through hole 311 of the connection end 310, and then turns up and passes through one of the fixing holes 321 of the fixing plate 320 for fixing. After the fiber cloth fixing device 300 and the fiber cloth strip 210 are fixed, pull the fiber cloth strip 210 from the other end so that the connection end 310 is inserted into the through hole 110. The process of inserting the connection end 310 into the through hole 110 is as Figure 3 shown. To improve the connection strength, after the fiber cloth strip 210 passes through the fixing hole 321, it can be wound several times, or tied to the fixing hole 321 during winding, and the end should also extend out of the fixing hole 321 to prepare for subsequent fixing on the floor surface.

[0113] It should be noted that when using the fiber cloth fixing device 300 to fix the cable 200 in the implementation manner disclosed in this embodiment, only the tension and torsional force need to be applied at the other end through the prestressing device 400.

[0114] Further see Figure 3 , Figure 4 , Figure 7 Taking the cable 200 including 4 fiber cloth strips and 4 fixing holes 321 provided on the fixing plate 320 as an example for illustration: Each fiber cloth strip 210 first passes through the through hole 110 of the composite floor slab 100, then passes through the through hole 311 of the connection end 310, turns up and then passes through one of the fixing holes 321 of the fixing plate 320 and is clamped and fixed or wound around the end of the fixing hole 321, and the fiber cloth strip 210 also extends outside the fixing hole 321. Then align the connection end 310 with the through hole 110 of the composite floor slab 100, insert the connection end 310 into the through hole 110, and the fixing plate 320 abuts and contacts the surface of the composite floor slab 100 around the through hole 110. It should be noted that those skilled in the art can adjust and design the fixing methods and means for fixing the end of the fiber cloth strip 210 on the fixing plate 320 after passing through the through hole 110 according to actual needs, and this embodiment does not make a unique limitation on this.

[0115] In this embodiment, the fiber cloth fixing device 300 is installed in the through hole 110 and fixed at one end of the composite floor slab 100. When there are voids or bulges in the middle of the composite floor slab 100, by pulling the other end of the cable 200 upward, the fiber cloth fixing device 300 and the corresponding side of the composite floor slab 100 are subjected to a force towards the other side, and the composite floor slab 100 is made to fit together.

[0116] Moreover, it should be noted that please refer to Figure 4 , because a part of the cable 200 near one end of the fiber cloth fixing device 300 is located in the through hole 311 of the connecting end 310. Therefore, the cable 200 located in the through hole 311 does not directly contact the inner wall surface of the through hole 110 on the composite floor slab 100. The cable 200 located in the through hole 311 is adhered to the inner wall part of the through hole 311, and the outer wall part of the connecting end 310 of the fiber cloth fixing device 300 can be adhered to the inner wall surface of the through hole 110 through an adhesive, or the outer wall part of the connecting end 310 can be provided with an external thread and the inner wall part of the through hole 110 can be provided with an internal thread for threaded connection. Those skilled in the art can set it according to actual needs, and this embodiment does not make specific limitations in this regard.

[0117] The prestressing tensioning device 400 can be common mechanical tensioning equipment, hydraulic tensioning equipment, electrothermal tensioning equipment, etc. For example, a drum type tensioner can be used for tensioning. Those skilled in the art can select it according to actual needs, and this embodiment does not make specific limitations in this regard.

[0118] When one end of the fiber cloth strip 210 is fixed to the floor surface on one side of the composite floor slab 100 through the fiber cloth fixing device 300, the other end is subjected to a pulling force through the prestressing tensioning device 400. For example, a rotational force can also be applied while applying the pulling force, which can improve the overall strength of the cable 200. The pulling force of the cable 200 can be dispersed to each fiber cloth strip 210, thereby avoiding structural damage caused by stress concentration and optimizing the stress state of the internal cable. It should be noted that when one end of the cable 200 is fixed through the fiber cloth fixing device 300, when the prestressing tensioning device 400 applies a pulling force at the other end, a reaction force is applied at one end of the fiber cloth fixing device 300, so that the internal cable 200 remains in a tensioned state. Through prestressing, the fiber cloth strip 210 and the cable 200 can jointly bear the structural load, thereby improving the stability and safety of the overall structure, and can effectively resist external loads, reduce the deformation and damage of the structure.

[0119] Then, the structural adhesive is poured into the perforation 110. When the structural adhesive, the cable 200, and the inner wall of the perforation 110 are completely hardened and solidified, the prestressed tensioning device 400 is removed. The prestressed tensioning device 400 can be removed by pulling it out. The fiber cloth fixing device 300 is fixed on the composite floor 100 and partially located in the perforation 110. Then, each fiber cloth strip 210 of the cable 200 is turned over and attached to the surface of the composite floor 100. Specifically, the fiber cloth strip 210 located on the upper surface of the composite floor 100 is turned down and laid flat and separated. The fiber cloth strips 210 on the lower surface of the composite floor 100 are loosely bonded to the upper surface of the composite floor 100, and the fiber cloth strips 210 on the lower surface of the composite floor 100 are turned upward and laid flat, and loosely bonded to the lower surface of the composite floor 100. Both ends of the cable 200 are attached to the floor surface on one side of the composite floor 100 in a dispersed manner. The dispersed arrangement of the cables 200 makes the composite floor 100 more evenly stressed, effectively preventing damage caused by local stress concentration, and forming a prestressed field inside the cables 200 and the perforations 110 to improve the bearing capacity of the composite floor 100. The composite floor 100 can better transmit and disperse stress when subjected to stress, thereby improving the overall stress performance of the composite floor 100.

[0120] It should be noted that, in addition to the implementation methods of the present invention described in the above-mentioned specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention is introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation method. On the contrary, the purpose of introducing the invention in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the above description contains many specific details, and the present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0121] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0122] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0123] The terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0124] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0125] Although the present invention has been illustrated and described by referring to some preferred embodiments thereof, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and detail, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A reinforcement structure for a composite floor, characterized in that: The composite floor comprises at least two overlapping floor slabs, and further comprises: at least one through hole penetrating the composite floor slab in a thickness direction of the composite floor slab; At least one cable, each of which is disposed through a corresponding one of the through holes, with both ends extending out of the two side ends of the through hole; Each of the cables is formed by stacking a number of fiber cloth strips and then twisting them together, each of the cables is bonded to the inner wall of the corresponding perforation by means of structural adhesive, and the fiber cloth strips in the portion of each cable located in the perforation are also bonded together by means of the structural adhesive; and both ends of each of the cables are respectively attached and fixed to the floor surface on the corresponding side in a manner that the ends of the fiber cloth strips are dispersed from each other; and A fiber cloth fixing device is provided at one end of the perforation, and the fiber cloth fixing device includes an integrally formed connecting end and a fixing plate; wherein The connecting end is cylindrical, the outer diameter of which matches the inner diameter of the through hole, and a through hole extending parallel to the through hole is provided inside; The fixing plate is disposed around the end of the connection end away from the composite floor slab, and includes a joint portion and a fixing portion arranged in sequence along the radial direction, and the fixing portion is disposed around the joint portion and includes a plurality of fixing holes arranged along the circumferential direction; and The connecting end extends into one end of the through-hole, the outer wall is fitted with the inner wall of the through-hole, and the fixing portion is in contact with the floor surface on the side around the through-hole. The corresponding end of the cable extends out of the one end of the through-hole through the through-hole, and the end of each fiber cloth strip bypasses the joint and passes through the corresponding fixing hole, and is flatly fixed on the floor surface on the corresponding side of the composite floor in a dispersed manner.

2. The reinforcement structure of the composite floor slab according to claim 1, characterized in that: in The plurality of fixing holes are arranged on the fixing portion in a manner of being evenly distributed along the circumferential direction; and The ends of the fiber cloth strips at both ends of the cable are dispersedly attached to and fixed on the floor surface of the corresponding side in a manner of being evenly spaced around the through hole.

3. The reinforcement structure of the composite floor slab according to claim 1, characterized in that: A plurality of through holes are provided at intervals on the composite floor slab, and each of the through holes is filled with the cable; wherein The apertures of the plurality of perforations are the same, and the aperture of each perforation is in the range of 10 to 80 mm; The thickness of each of the fiber cloth strips is in the range of 0.1 mm to 0.2 mm, and the cable is formed by stacking and twisting a plurality of the fiber cloth strips; and The diameter of each of the perforations is larger than the total thickness of all the fiber cloth strips of the cable filled therein, and the size difference between the two is within the range of 3-5 mm.

4. The reinforcement structure of the composite floor slab according to claim 1, characterized in that: Each of the fiber cloth strips is formed by combining fiber material, matrix material, and reinforcing agent; in The fiber material includes any one of carbon fiber, glass fiber, polyimide fiber, silicon carbide fiber, ceramic fiber, and metal fiber; The matrix material is coated on the outer layer of the fiber material as a binder or a protective layer, and includes one of epoxy resin, acrylic resin, polyurethane, and phenolic resin; The reinforcing agent is coated on the periphery of the fiber cloth strip and includes at least one of an anti-ultraviolet agent and an antioxidant.

5. A method for reinforcing a composite floor, characterized in that: The reinforcement method is used to form a reinforcement structure of a composite floor slab as claimed in any one of claims 1 to 4, and the method comprises: S1. A through hole is formed on the composite floor slab, wherein the through hole penetrates the composite floor slab along the thickness direction of the composite floor slab; S2, stacking a plurality of fiber cloth strips together, and then twisting them together to form a cable, and passing the cable through the composite floor along the through hole, the plurality of fiber cloth strips of the cable located in the through hole are intertwined with each other, and both ends of the cable extend out of the two side ends of the through hole; wherein the length of the cable is greater than the thickness of the composite floor, and the radial cross-sectional area of ​​the cable is equal to or smaller than the cross-sectional area of ​​the through hole; S3, pulling the two ends of the cable on both sides of the composite floor slab and applying tension to the cable along the length direction of the cable; S4, pouring structural adhesive into the through-hole from at least one end of the through-hole so that the cable is bonded to the inner wall of the through-hole, and releasing the tension after the structural adhesive solidifies; S5, attaching and fixing the two ends of the cable to the floor surface of the corresponding side in a manner that the ends of the fiber cloth strips are dispersed from each other; S6. Inspect and accept the composite floor slab.

6. The reinforcement method of composite floor slab according to claim 5, characterized in that: in In the step S1, after the through hole is formed on the composite floor slab, a thread groove is further formed on the inner wall surface of the through hole or roughening is performed, and the inner wall surface is cleaned; and In the step S2, after the cable passes through the composite floor, at least part of the outer peripheral surface of the portion of the cable located in the hole is not in close contact with the inner wall surface of the hole.

7. The reinforcement method of composite floor slab according to claim 5, characterized in that: In step S3: When the two ends of the cable are pulled on both sides of the composite floor, a tension is applied to the corresponding ends of each fiber cloth strip at each end of the cable, and the direction of the tension is consistent with the length direction of the cable and is toward the side away from the composite floor; and While a tensile force is applied to the cable, a torsional force around the length direction is also applied to at least one end of the cable.

8. The reinforcement method of composite floor slab according to claim 5, characterized in that: In step S4: When pouring the structural adhesive into the perforation, the structural adhesive is poured into the perforation from both sides of the composite floor slab simultaneously or at intervals, so that the structural adhesive fills the gap between the outer peripheral surface of the hole portion of the cable and the inner wall of the perforation and bonds the cable and the inner wall together; The structural adhesive is one of epoxy resin adhesive, polyurethane adhesive and acrylic adhesive.

9. The reinforcement method of composite floor slab according to claim 5, characterized in that: In step S5: The fiber cloth strips at each end of the cable are spread uniformly around the perforations and laid on the floor surface of the corresponding side of the composite floor, and are fixedly connected to the floor surface by bonding.

10. The reinforcement method of composite floor slab according to claim 5, characterized in that: In step S3: One end of the cable is fixed to the floor surface of one side of the composite floor by using a fiber cloth fixing device, and the other end of the cable is pulled by using a prestressed tensioning device to apply tension to the cable along the length direction of the cable; One end of the fiber cloth fixing device is fixed to the floor surface on one side of the composite floor, and the end of each fiber cloth strip at the corresponding end of the cable is engaged and fixed to the other end of the fiber cloth fixing device away from the composite floor; and One end of the prestressed tensioning device is fixed on the floor surface on the other side of the composite floor, and the other end of the cable is connected to the other end of the prestressed tensioning device away from the composite floor and can move with the other end of the prestressed tensioning device.

11. The reinforcement method of composite floor slab according to claim 10, characterized in that: in In the step S4, after the structural adhesive solidifies, the prestressing tensioning device is removed; and In step S5, the other end of the cable is adhered and fixed to the floor surface on the other side of the composite floor in a manner that the ends of each fiber cloth strip are dispersed with each other, and the ends of each fiber cloth strip at one end of the cable are adhered and fixed to the floor surface on one side of the composite floor in a manner that the ends of each fiber cloth strip are dispersed with each other.

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