Reinforced fiber composite material connecting structure and method for improving structural strength of old building

Abstract

The invention discloses a reinforced fiber composite material connecting structure and method for improving the structural strength of an old building, and the connecting structure comprises a reinforced fiber composite plate and metal connecting assemblies fixedly connected with the two ends of the reinforced fiber composite plate. The reinforced fiber composite board comprises an inorganic fiber reinforced structural layer and an organic fiber reinforced binding, wrapping and stretching layer, the structural layer is wrapped in the binding, wrapping and stretching layer, the structural layer is formed by alternately arranging multiple layers of carbon fiber fabrics and multiple layers of glass fiber fabrics in parallel, and all the layers are compounded into a whole through a resin matrix. The tensile strength of the formed reinforced fiber composite board reaches up to 2400 MPa, and all physical and mechanical properties are high; according to the reinforced fiber composite material connecting structure and method, the structural rigidity and strength of old roads, bridges and culverts are greatly improved, under the condition that the construction amount is reduced, it is ensured that old building structures can be normally used, and the effect of prolonging the service life is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of reinforcing and extending the life of old building structures, and in particular to a reinforced fiber composite material connection structure and a connection method for improving the strength of old building structures. Background Art

[0002] In modern transportation infrastructure, roads, bridges, and culverts play a vital role. From the perspective of transportation network operation and maintenance, the insufficient structural strength of roads, bridges, culverts, and other old buildings not only limits the road's traffic capacity, but frequent repairs and partial closures also cause traffic congestion, increase logistics costs, and increase residents' travel time. Moreover, large-scale reconstruction of roads, bridges, and culverts faces high project costs, long construction periods, and great interference with surrounding traffic during construction. Therefore, the research and development of reinforcement structures and connection methods specifically for road, bridge, and culvert buildings is of great significance for ensuring the stable operation of transportation infrastructure and promoting the sustainable development of the transportation industry. Summary of the invention

[0003] The present invention aims to solve the key problems of reduced structural strength and reduced safety factor of old roads, bridges, culverts and building structures. In order to ensure that old roads, bridges, culverts and building structures can be used normally and reduce the amount of construction, the present invention provides a reinforced fiber composite material connection structure and connection method for improving the strength of old building structures, which greatly improves the structural rigidity of old roads, bridges, culverts and building structures and has the effect of enhancing and extending their service life.

[0004] The technical solutions adopted are as follows:

[0005] On the one hand, the present invention provides a reinforced fiber composite material connection structure for improving the structural strength of old buildings, the connection structure comprising a reinforced fiber composite plate and a metal connection component fixedly connected to both ends of the reinforced fiber composite plate, the reinforced fiber composite plate comprising an inorganic fiber reinforced structural layer and an organic fiber reinforced binding wrap stretch layer, the structural layer is wrapped inside the binding wrap stretch layer, which is composed of multiple layers of carbon fiber fabrics and multiple layers of glass fiber fabrics arranged alternately in parallel, and each layer is composited into one through its own resin matrix.

[0006] Preferably, the restraining, wrapping and stretching layer is wavy, the structural layer is an alternating layer of carbon fiber fabric and glass fiber fabric, and the structural layer and the restraining, wrapping and stretching layer form the same wavy shape.

[0007] Preferably, the restraining wrapping stretch layer uses aramid fiber, PBO fiber or a mixed fiber of the two as a reinforcing material, and uses elastic polyurethane resin as a resin matrix, and forms a closed peripheral wrapping structure by online weaving; the resin matrix between the structural layers is one of epoxy resin or vinyl resin.

[0008] Further preferably, the metal connecting assembly includes a metal plate, a first rotating shaft and a second rotating shaft, both side edges of the metal plate are bent toward the same side to form a right-angled edge, and the first rotating shaft and the second rotating shaft are spaced apart on the two right-angled edges to fix the reinforced fiber composite plate on the metal plate.

[0009] Furthermore, a toothed clamping plate fixed on the first rotating shaft is provided near one end of the metal plate, and the toothed clamping plate is provided with a plurality of sharp teeth perpendicular to the bottom surface of the metal plate. The toothed clamping plate adopts a spring structure to provide a clamping force, and the first rotating shaft provides a rotating axis for the toothed clamping plate.

[0010] Furthermore, the inner side surface of each right-angle fold includes an inverted cone clamping structure having a plurality of inverted cone-shaped clamping teeth, and after the inverted cone-shaped clamping teeth are clamped with both ends of the second rotating shaft, the reinforced fiber composite plate is squeezed onto the metal plate and fixed.

[0011] Furthermore, the inverted cone clamping structure includes a rotating shaft clamping plate fixed on the inner side surface of each right-angle folded edge, and a plurality of inverted cone-shaped clamping teeth are formed along the length direction of the rotating shaft clamping plate and are arranged at an angle. The two ends of the second rotating shaft can be rotatably and stretchably clamped in suitable inverted cone-shaped clamping teeth.

[0012] Furthermore, an anti-loosening plate is provided along the length direction of the second rotating shaft and is relatively rotatable with respect to the second rotating shaft. After the second rotating shaft is installed, the anti-loosening plate is inclined and stuck at the junction of the restraining wrapping stretching layer and the structural layer at the end, and is against the appropriate position of the metal plate.

[0013] On the other hand, the present invention also provides a method for connecting reinforced fiber composite materials to improve the strength of old building structures. The connection method is specifically:

[0014] Step 1: Grind the reinforced surface of the old building structure and clean the reinforced surface;

[0015] Step 2, spray the cleaned reinforcement surface with a silane coupling agent alcohol solution and dry the solvent;

[0016] Step 3, grinding and roughening the bonding surface of the manufactured reinforced fiber composite panel and cleaning the bonding surface;

[0017] Step 4, spraying the cleaned bonding surface with a silane coupling agent alcohol solution and drying the solvent;

[0018] Step 5, fixing the two ends of the reinforced fiber composite plate to the corresponding metal connection components respectively, and applying structural adhesive on the bonding surface;

[0019] Step 6, fixing the metal connection assembly to the reinforcement surface of the old building structure by expansion bolts;

[0020] Step 7: tighten and fix the reinforced fiber composite board so that the reinforcement surface is in close contact with the bonding surface until the structural adhesive is completely cured.

[0021] Preferably, the structural layer wrapped at both ends of the reinforced fiber composite plate is cut so that the bound wrapped stretching layer at both ends of the reinforced fiber composite plate extends out of the end surface of the structural layer by 100 mm to 200 mm, and the extended bound wrapped stretching layer is wound on the second rotating shaft;

[0022] The structural adhesive is applied in sections on the bonding surface of the reinforced fiber composite board, and the troughs of the reinforced structural layer are filled with the structural adhesive within a width range of 100mm-200mm at a spacing of 1m, so that the structural adhesive at the crest is at least 0.5mm higher.

[0023] In step 7, the specific method of tightening and fixing the reinforced fiber composite plate is:

[0024] Apply quick-drying glue to the end of the binding wrapping stretching layer and glue it to the second rotating shaft;

[0025] The second rotating shaft is rotated to roll the restraining wrapping stretching layer onto the second rotating shaft, thereby firmly fixing the reinforced fiber composite plate;

[0026] Pull the second rotating shaft into a suitable inverted cone clamping structure until the reinforced fiber composite plate is tightened;

[0027] The anti-loosening plate on the second rotating shaft is pressed against the position where the structural layer and the restraining wrapping stretching layer meet to prevent the second rotating shaft from loosening;

[0028] The first rotating shaft is rotated to fix the toothed clamping plate containing the spring structure at an appropriate position of the structural layer part of the fiber reinforced composite plate, so that the sharp teeth on the toothed clamping plate pierce the reinforced fiber composite plate and form abutment with the metal plate.

[0029] The technical solution of the present invention has the following advantages:

[0030] A. The reinforced fiber composite material connection structure provided by the present invention has high physical and mechanical properties. It adopts multiple layers of carbon fiber fabrics and multiple layers of glass fiber fabrics to be arranged alternately in parallel, and the layers are compounded together by a resin matrix. After testing, the tensile strength of the formed reinforced fiber composite board is as high as 2400MPa, and various physical and mechanical properties are relatively high. The preferred structural layer and the restraining wrapped tensile layer adopt a wavy shape design, which greatly improves the stiffness of the reinforced fiber composite board and has an excellent reinforcement effect. When used on old roads, bridges, culverts and building structures, its bearing capacity and structural stiffness are greatly improved, and its service life can be effectively extended.

[0031] B. The reinforced fiber composite material connection structure provided by the present invention is weather-resistant and uses polyurethane structural adhesive as the interface bonding material of the fiber-reinforced composite material structure. It has high strength and good flexibility. It can effectively compensate for the interface separation phenomenon caused by different linear expansion coefficients during alternating hot and cold weather conditions through elastic deformation and has good durability.

[0032] C. The reinforced fiber composite material connection structure provided by the present invention has good chemical corrosion resistance, and the reinforced fiber composite board has a very strong resistance to chemical substances such as acids, alkalis, and salts, which greatly improves the service life of old roads, bridges, culverts and building structures, thereby effectively reducing the full life cycle use cost.

[0033] D. The use of the reinforced fiber composite material connection structure and connection method provided by the present invention can greatly improve the strength of old building structures, greatly improve the safety factor and service life of the building while increasing very little cost; the present invention adopts a multi-tooth fixing structure to make the reinforced structure highly adjustable, greatly reduce the construction difficulty, and make the reinforcement construction of old buildings possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a flow chart of the method for connecting reinforced fiber composite materials provided by the present invention;

[0036] Figure 2 It is a schematic plan view of the reinforced fiber composite board provided by the present invention;

[0037] Figure 3 yes Figure 2 A schematic cross-sectional view of the structure shown;

[0038] Figure 4 It is a schematic diagram of the structure of the metal connection assembly provided by the present invention;

[0039] Figure 5 yes Figure 4 A schematic diagram of the connection between the first rotating shaft and the toothed clamping plate;

[0040] Figure 6 It is a schematic diagram of the connection and fixing structure of the reinforced fiber composite plate provided by the present invention with the first rotating shaft and the second rotating shaft;

[0041] Figure 7It is a schematic diagram of the connection between the reinforced fiber composite plate and the metal connection assembly provided by the present invention;

[0042] Figure 8 It is a schematic diagram of bonding an old building structure and a reinforced fiber composite board provided by the present invention;

[0043] Fig. 9 It is a schematic diagram of the installation structure between the old building structure and the reinforced fiber composite board and the metal connection assembly provided by the present invention.

[0044] The markings in the figure are as follows:

[0045] 1-Reinforced fiber composite board

[0046] 11-Structural layer

[0047] 111-carbon fiber fabric, 112-glass fiber fabric, 113-resin matrix

[0048] 12-Bound Wrap Stretch Layer

[0049] 2-Metal connection components

[0050] 21-Metal plate, 211-Right angle fold, 212-Fixing hole

[0051] 22-First rotating shaft

[0052] 23- Second axis

[0053] 24-tooth clamping plate

[0054] 25-Inverted cone clamping structure

[0055] 251-inverted cone-shaped teeth, 252-rotating shaft clamping plate

[0056] 26- anti-loosening plate; 27- spring structure

[0057] 3-Structural adhesive; 4-Old building structure; 5-Expansion bolts. DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] like Figure 2 , Figure 3 and Figure 7As shown, the present invention provides a reinforced fiber composite material connection structure for improving the structural strength of old buildings, including a reinforced fiber composite board 1 and a metal connection component 2 fixedly connected to both ends of the reinforced fiber composite board 1. The reinforced fiber composite board 1 includes an inorganic fiber reinforced structural layer 11 and an organic fiber reinforced binding wrapping stretching layer 12. The structural layer 11 is wrapped inside the binding wrapping stretching layer 12, which is composed of multiple layers of carbon fiber fabric 111 and multiple layers of glass fiber fabric 112 arranged alternately and in parallel, and each layer is composited into a whole through a resin matrix 113. Of course, basalt fiber reinforced thermosetting epoxy resin, vinyl finger resin and other resin-based composite materials can also be used. The binding wrapping stretching layer 12 uses aramid fiber, PBO fiber or a mixed fiber of the two as a reinforcing material, and uses an elastic polyurethane resin as a resin matrix. A closed peripheral wrapping structure is formed by online weaving; it is prepared by co-injection of multiple resins, one or more layers of weaving and pultrusion processes. Preferably, the binding wrapping tensile layer 12 located on the periphery of the reinforced fiber composite panel 1 is wavy, and a closed peripheral wrapping structure is formed by online weaving; and the carbon fiber fabric 111 and the glass fiber fabric 112 respectively form the same wavy shape as the binding wrapping tensile layer 12. The reinforced fiber composite panel 1 in the present invention is fixed to the bottom and support column of, for example, a road bridge and a culvert by bonding and end clamping, which greatly improves the structural rigidity of old road bridges, culverts and building structures, and has the effect of enhancing and extending life.

[0060] During construction, the two ends of the reinforced fiber composite board 1 are fixed to the metal connection components 2 respectively. The structural adhesive is applied in sections on the surface of the reinforced fiber composite board 1 at the contact surface with old building structures such as roads, bridges, and culverts. The entire surface with a width of 100mm to 200mm is applied at intervals of 1m until the trough is filled with adhesive and the adhesive at the peak is greater than 0.5mm. The metal connection components 2 at both ends are fixed at appropriate positions of roads, bridges, culverts, and old building structures, and pressure is applied to the adhesive-coated parts until the polyurethane adhesive is completely cured.

[0061] The connecting end portion of the reinforced fiber composite plate 1, the outer organic fiber reinforced binding wrapped stretch layer 12 is 10-20 cm longer than the middle inorganic fiber reinforced structural layer 11, and is used to cooperate with the end metal connecting component 2 for winding and connection, such as Figure 6 shown.

[0062] like Figure 4 As shown, the metal connection assembly 2 includes a metal plate 21, a first rotating shaft 22 and a second rotating shaft 23. The two sides of the metal plate 21 are bent toward the same side to form a right-angled edge 211. The first rotating shaft 22 and the second rotating shaft 23 are arranged at intervals on the two right-angled edges 211, which are used to fix the reinforced fiber composite plate 1 on the metal plate 21. Fixing holes 212 are provided at both ends of the metal plate 21, which are used to be fixedly connected to the road, bridge, culvert and old building structure 4 through expansion bolts 5.

[0063] As a further preferred embodiment of the present invention, Figure 4 and Figure 5 As shown, a toothed clamping plate 24 fixed on the first rotating shaft 22 is provided near one end of the metal plate 21, and a plurality of sharp teeth perpendicular to the bottom surface of the metal plate 21 are provided on the toothed clamping plate 24. The spring structure 27 is used to provide a clamping force for the toothed clamping plate 24, and the first rotating shaft 22 provides a rotation axis for the toothed clamping plate 24. When one end of the reinforced fiber composite plate 1 is attached to the toothed clamping plate 24, it is squeezed by a tool so that the sharp teeth on the toothed clamping plate 24 penetrate into the reinforced fiber composite plate 1, and the metal plate 21 and the reinforced fiber composite plate 1 are firmly combined together.

[0064] As a further preferred embodiment of the present invention, Figure 4 As shown, an inverted cone clamping structure 25 having a plurality of inverted cone-shaped teeth 251 is fixed on the inner side of each right-angle folded edge 211. After the inverted cone-shaped teeth 251 are clamped with the two ends of the second rotating shaft 23, the reinforced fiber composite plate 1 is pressed and fixed on the metal plate 21. The inverted cone clamping structure 25 here includes a rotating shaft clamping plate 252 fixed on the inner side of each right-angle folded edge 211. A plurality of inverted cone-shaped teeth 251 arranged at intervals are formed along the length direction of the rotating shaft clamping plate 252. The inverted cone-shaped teeth 251 are arranged obliquely. The two ends of the second rotating shaft 23 can be rotatably and stretchably clamped in suitable inverted cone-shaped teeth 251. When the metal plate 21 is connected to the reinforced fiber composite plate 1, the binding wrapped tensile layer 12 at the end of the reinforced fiber composite plate 1 is wound on the second rotating shaft 23. The second rotating shaft 23 can be pulled from the previous inverted cone-shaped teeth 251 to the next inverted cone-shaped teeth 251 by a tensile machine, which plays a role of fine-tuning and tightening.

[0065] As a further preferred embodiment of the present invention, Figure 7 As shown, a loose-proof plate 26 is provided along the length direction of the second rotating shaft 23, and the loose-proof plate 26 is mounted on both ends of the second rotating shaft 23, and the two form a relative rotation connection. After the second rotating shaft 23 is installed, the loose-proof plate 26 is inclined and clamped at the junction of the binding wrapped stretching layer 12 and the structural layer 11 of the end, and abuts against the metal plate 21 at an appropriate position, playing a long-term anti-slip effect.

[0066] like Figure 1 , Figure 8 and Fig. 9 As shown, for old road bridge culverts, the specific connection method and steps between the reinforced fiber composite plate, metal plate and road bridge culvert are as follows:

[0067]

S01

[0068] The concrete surface of the old road bridge culvert is polished with an angle grinder, and the loose soil on the surface is cleaned with compressed air.

[0069]

S02

[0070]

S03

[0071]

S04

[0072] [S05] Fix the two ends of the reinforced fiber composite plate to the corresponding metal connection components respectively, and apply structural adhesive on the bonding surface.

[0073] [S051] Cut the structural layer wrapped at both ends of the reinforced fiber composite plate so that the binding wrapped tensile layer at both ends of the reinforced fiber composite plate extends 100mm-200mm beyond the end surface of the structural layer;

[0074] [S052] Winding the extended restraining wrapping stretching layer onto the second rotating shaft;

[0075] [S053] Structural adhesive is applied in sections on the bonding surface of the reinforced fiber composite panel, and the troughs of the restrained wrapped tensile layer are filled with structural adhesive within a width range of 100mm-200mm at a spacing of 1m, so that the structural adhesive at the crest is at least 0.5mm higher.

[0076]

S06

[0077]

S07

[0078]

S071

[0079] [S072] Rotate the second rotating shaft to roll the restraining wrapped stretch layer onto the second rotating shaft to firmly fix the reinforced fiber composite plate;

[0080] [S073] Pull the second rotating shaft into a suitable inverted cone clamping structure until the reinforced fiber composite plate is tightened;

[0081] [S074] Push the anti-loosening plate on the second rotating shaft to the position where the structural layer and the restraining wrapping stretching layer meet to prevent the second rotating shaft from loosening;

[0082] [S075] Rotate the first rotating shaft to fix the toothed clamping plate containing the spring structure at an appropriate position of the structural layer of the fiber reinforced composite plate, so that the sharp teeth on the toothed clamping plate pierce the reinforced fiber composite plate and abut against the metal plate;

[0083]

S076

[0084]

S08

[0085] Anything not described in the present invention is applicable to the prior art.

[0086] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A reinforced fiber composite material connection structure for improving the strength of old building structures, characterized in that: The connection structure comprises a reinforced fiber composite plate (1) and a metal connection assembly (2) fixedly connected to both ends of the reinforced fiber composite plate (1); the reinforced fiber composite plate (1) comprises an inorganic fiber reinforced structural layer (11) and an organic fiber reinforced binding wrapped tensile layer (12); the structural layer (11) is wrapped inside the binding wrapped tensile layer (12); the structural layer (11) is composed of multiple layers of carbon fiber fabric (111) and multiple layers of glass fiber fabric (112) arranged alternately in parallel, and each layer is composited into one through its own resin matrix (113).

2. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to claim 1, characterized in that: The restraining, wrapping and stretching layer (12) is wavy, the structural layer (11) is an alternating layer of carbon fiber fabric (111) and glass fiber fabric (112), and the structural layer (11) and the restraining, wrapping and stretching layer (12) form the same wavy shape.

3. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to claim 2, characterized in that: The restraining wrapping stretching layer (12) uses aramid fiber, PBO fiber or a mixed fiber of the two as a reinforcing material and uses elastic polyurethane resin as a resin matrix to form a closed peripheral wrapping structure through online weaving; the resin matrix (113) between the structural layers (11) is one of epoxy resin and vinyl resin.

4. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to any one of claims 1 to 3, characterized in that: The metal connection assembly (2) comprises a metal plate (21), a first rotating shaft (22) and a second rotating shaft (23); two side edges of the metal plate (21) are bent toward the same side to form right-angled edges (211); the first rotating shaft (22) and the second rotating shaft (23) are arranged at intervals on the two right-angled edges (211) to fix the reinforced fiber composite plate (1) on the metal plate (21).

5. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to claim 4, characterized in that: A toothed clamping plate (24) fixed on the first rotating shaft (22) is also provided near one end of the metal plate (21); the toothed clamping plate (24) is provided with a plurality of sharp teeth perpendicular to the bottom surface of the metal plate (21); the toothed clamping plate (24) adopts a spring structure (27) to provide a clamping force; and the first rotating shaft (22) provides a rotating axis for the toothed clamping plate (24).

6. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to claim 5, characterized in that: The inner side surface of each right-angle folded edge (211) comprises an inverted cone clamping structure (25) having a plurality of inverted cone-shaped clamping teeth (251); after the inverted cone-shaped clamping teeth (251) are clamped with the two ends of the second rotating shaft (23), the reinforced fiber composite plate (1) is pressed onto the metal plate (21) and fixed.

7. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to claim 6, characterized in that: The inverted cone clamping structure (25) comprises a rotating shaft clamping plate (252) fixed on the inner side surface of each right-angle folded edge (211), and a plurality of inverted cone-shaped clamping teeth (251) arranged at intervals are formed along the length direction of the rotating shaft clamping plate (252). The inverted cone-shaped clamping teeth (251) are arranged obliquely, and the two ends of the second rotating shaft (23) can be rotatably and stretchably clamped in suitable inverted cone-shaped clamping teeth (251).

8. The reinforced fiber composite material connection structure for improving the structural strength of old buildings according to claim 4, characterized in that: An anti-loosening plate (26) is also provided along the length direction of the second rotating shaft (23) and is relatively rotatable with respect to the second rotating shaft. After the second rotating shaft (23) is installed, the anti-loosening plate (26) is obliquely clamped at the junction of the restraining, wrapping and stretching layer (12) at the end and the structural layer (11), and is abutted against an appropriate position of the metal plate (21).

9. A method for connecting reinforced fiber composite materials to improve the strength of old building structures, characterized in that: The connection method is specifically: Step 1: Grind the reinforced surface of the old building structure and clean the reinforced surface; Step 2, spray the cleaned reinforcement surface with a silane coupling agent alcohol solution and dry the solvent; Step 3, grinding and roughening the bonding surface of the manufactured reinforced fiber composite panel and cleaning the bonding surface; Step 4, spraying the cleaned bonding surface with a silane coupling agent alcohol solution and drying the solvent; Step 5, fixing the two ends of the reinforced fiber composite plate to the corresponding metal connection components respectively, and applying structural adhesive on the bonding surface; Step 6, fixing the metal connection assembly to the reinforcement surface of the old building structure by expansion bolts; Step 7: tighten and fix the reinforced fiber composite board so that the reinforcement surface is in close contact with the bonding surface until the structural adhesive is completely cured.

10. The method for connecting reinforced fiber composite materials according to claim 9, characterized in that: In the step 5, the structural layer wrapped at both ends of the reinforced fiber composite plate is cut so that the bound wrapped stretching layer at both ends of the reinforced fiber composite plate extends out of the end surface of the structural layer by 100 mm to 200 mm, and the extended bound wrapped stretching layer is wound on the second rotating shaft; The structural adhesive is applied in sections on the bonding surface of the reinforced fiber composite board, and the troughs of the reinforced structural layer are filled with the structural adhesive within a width range of 100mm-200mm at a spacing of 1m, so that the structural adhesive at the crest is at least 0.5mm higher.

11. The method for connecting reinforced fiber composite materials according to claim 9, characterized in that: In step 7, the specific method of tightening and fixing the reinforced fiber composite plate is: Apply quick-drying glue to the end of the binding wrapping stretching layer and glue it to the second rotating shaft; The second rotating shaft is rotated to roll the restraining wrapping stretching layer onto the second rotating shaft, thereby firmly fixing the reinforced fiber composite plate; Pull the second rotating shaft into a suitable inverted cone clamping structure until the reinforced fiber composite plate is tightened; The anti-loosening plate on the second rotating shaft is pressed against the position where the structural layer and the restraining wrapping stretching layer meet to prevent the second rotating shaft from loosening; The first rotating shaft is rotated to fix the toothed clamping plate containing the spring structure at an appropriate position of the structural layer part of the fiber reinforced composite plate, so that the sharp teeth on the toothed clamping plate pierce the reinforced fiber composite plate and form abutment with the metal plate.

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