Spherical waveform friction increasing type tension direction variable multi-layer carbon fiber plate prestress reinforcing system

Abstract

A spherical wave-shaped friction increasing type tension direction variable multi-layer carbon fiber plate prestress reinforcing system comprises a left base, a right base, a plurality of layers of carbon fiber plates, a left anchor head, a right anchor head and a fixing plate, the upper portion and the lower portion of the front end of each base are each provided with a hinge wheel, and each anchor head is formed by connecting an upper anchor seat and a lower anchor seat through bolts. The anchor seat is connected with the corresponding hinge wheel of the base through a rotating hole in the end portion, a fastening groove is formed in the anchor seat and comprises a wedge-shaped groove in the front portion and a spherical wave-shaped groove in the rear portion, and the two ends of the carbon fiber plate extend into the fastening groove between the left anchor head and the right anchor head respectively. The base and the anchor head of the system achieve automatic straightening of the carbon plate through the hinge wheel, installation deviation of the tensioning base can be made up, meanwhile, the anchor head is of a gradually-increasing friction type fastening structure formed by combining a wedge-shaped groove with a spherical wave-shaped groove, damage to the tensioning strength of the carbon plate is avoided while the connection firmness of the carbon plate is guaranteed, and the service life of the carbon plate is prolonged. And in addition, one-way tensioning can be achieved at any end according to the actual installation environment, and the applicability of the reinforcing system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete structure reinforcement, in particular to a spherical waveform friction resistance increasing type variable tensioning direction multilayer carbon fiber plate prestressed reinforcement system. Background Art

[0002] With the aging of building structures, more and more work is being done to reinforce and repair them. Carbon fiber panels are one of the best corrosion (weather) resistant materials in current building materials. Existing research results show that environmental effects such as weak acid, weak alkali, freeze-thaw cycles, and long-term sunshine have little effect on the mechanical properties and aging resistance of carbon fiber. The technology of using prestressed carbon fiber panels for reinforcement is also becoming more and more widely used. After the carbon fiber panels are tensioned and anchored to the surface of the reinforced body, the bending strength and crack resistance of the reinforced body can be improved. It can also improve the use efficiency of composite fiber materials and reduce reinforcement costs. There are still some problems with the prestressed carbon fiber panel reinforcement devices on the current market.

[0003] The carbon fiber board is the core component of the prestressed carbon fiber board reinforcement device. Whether the carbon fiber board is firmly connected and whether it can maintain a straight state during the installation process is the key factor in whether the tensile strength of the carbon fiber board can be maximized. The carbon fiber board is fastened and installed in the anchor. In order to improve the connection firmness of the carbon fiber board, the anchors of the common prestressed carbon fiber board reinforcement devices on the market mostly use S-shaped fastening grooves. The carbon fiber board is prone to distortion in the S-shaped fastening groove, which can easily cause brittle failure of the carbon fiber board. The strength that the carbon fiber board can exert is also low, and the carbon fiber board is prone to tilt during the actual installation process. Once the existing prestressed carbon fiber board reinforcement device is installed, if the carbon fiber board is tilted, it cannot be automatically straightened, which will also seriously affect the tensile strength of the carbon fiber board. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a spherical waveform friction resistance increasing type variable tensioning direction multi-layer carbon fiber plate prestressed reinforcement system.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A spherical waveform friction increasing type variable tensioning direction multi-layer carbon fiber plate prestressed reinforcement system comprises two left and right bases, several layers of carbon fiber plates, two left and right anchor heads and a fixing plate, several bolt holes are respectively arranged on the left and right sides of the base, a hinge wheel is respectively arranged on the upper and lower front ends of each base, each anchor head comprises two upper and lower anchor seats connected by bolts, the anchor seats are connected to the corresponding hinge wheels of the base through the rotating holes at the ends, a fastening groove is arranged inside the anchor seat, the fastening groove comprises a wedge-shaped groove at the front and a spherical waveform groove at the rear, two ends of the carbon fiber plate are respectively extended into the fastening groove between the left and right anchor heads, two tensioning screws respectively pass through the bolt holes on the left and right sides of the base, and the ends of the two tensioning screws are respectively connected to the fixing plate.

[0007] A plurality of resistance stripes are arranged on the surface of the fastening groove of the anchor seat.

[0008] Several reinforced bases can be set at the rear of the above-mentioned base according to the actual installation tension strength requirements. Several bolt holes are set on the left and right sides of the reinforced base respectively. The tensioning screw passes through the bolt holes on the left and right sides of the reinforced base so that the base is connected to the reinforced base.

[0009] Installation and use process of this utility model:

[0010] 1. According to the design requirements, determine the length of the carbon fiber plate, extend the two ends of the multi-layer carbon fiber plate into the fastening groove between the left and right anchor heads in the factory, pre-install the carbon fiber plate and the anchor, and then transport it to the installation site. The wedge-shaped groove in the front of the anchor head fastening groove can increase the front pressure of the carbon fiber plate and improve the connection firmness of the carbon plate. The spherical corrugated groove in the rear of the fastening groove can increase the horizontal cross-sectional area of ​​the carbon plate, enhance friction resistance, and prevent the shear strength damage between the carbon plate layers to the greatest extent, ensuring the tensile strength of the carbon plate.

[0011] 2. During on-site installation, determine the center line, drill holes and plant reinforcement (the drilling depth is 8-10 times the diameter of the reinforcement; inject reinforcement glue into the hole, and implant 8.8-grade high-strength trapezoidal bolts or 8.8-grade high-strength chemical anchors).

[0012] 3. The utility model can realize unidirectional tensioning at any one end. According to the actual installation situation, the base of one end is determined as the tensioning end, and the base of the other end is the fixed end. Then, according to the strength requirements, the corresponding reinforced base is set at the rear of the base, and the tensioning end and the fixed end base and the reinforced base are installed. The fixed plate is installed at the end of the tensioning end, and the carbon plate and the anchor head are hung.

[0013] 4. Glue coating on carbon plate.

[0014] 5. Install the tensioning tool (jack) at the tensioning end. The bottom of the tensioning cylinder is against the fixed plate. The piston rod of the cylinder pushes the base at the tensioning end to move, and the carbon plate is tensioned in stages. During the tensioning process, the hinge connection between the base and the anchor head is automatically adjusted to compensate for the installation deviation of the tensioning base, keep the carbon plate straight, and ensure that the tensioning strength of the carbon plate is maximized.

[0015] 6. Utilize concrete structure deformation monitoring to achieve both reinforcement and monitoring.

[0016] 7. After tensioning is completed, dismantle the tensioning system, remove the jacks, screws, nuts and fixing plates, and use pressure plates to fix them on the concrete surface to ensure that the surface of the concrete structure is smooth and clean.

[0017] 8. After the beam body is painted, the bases on both sides are sealed separately.

[0018] The base and anchor head of the utility model system realize automatic straightening of the carbon plate through the hinge wheel, which can compensate for the installation deviation of the tensioning base and keep the carbon plate straight. At the same time, the anchor head adopts a gradually increasing friction fastening structure formed by a wedge groove and a spherical corrugated groove, which ensures the firmness of the carbon plate connection while avoiding damage to the tensioning strength of the carbon plate. In addition, one-way tensioning can be realized at any end according to the actual installation environment, which improves the applicability of the reinforcement system and has the advantages of reasonable design, convenient installation, and stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the connection structure of the utility model;

[0021] Figure 2 It is a side view schematic diagram of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the anchor head of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the anchor seat of the utility model.

[0024] In the figure, 1 is a base, 2 is a carbon fiber plate, 3 is an anchor head, 4 is a tensioning screw, 5 is a fixing plate, 6 is a fastening bolt, 7 is a reinforcing base, 8 is a bolt, 11 is a hinge wheel, 12 is a bolt hole, 31 is an anchor seat, 32 is a rotating hole, 33 is a fastening groove, 34 is a wedge-shaped groove, 35 is a spherical corrugated groove, 36 is a bolt hole, and 37 is a resistance stripe. DETAILED DESCRIPTION

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a spherical wave friction resistance increasing type variable tension direction multi-layer carbon fiber plate prestressed reinforcement system includes two left and right bases 1, several layers of carbon fiber plates 2, two left and right anchor heads 3 and a fixing plate 5. Several bolt holes 12 are respectively arranged on the left and right sides of the base 1. A hinge wheel 11 is respectively arranged on the upper and lower front ends of each base 1. Each anchor head 3 has two upper and lower anchor seats 31 connected by bolts 8 passing through the corresponding bolt holes 36 of the anchor seats. The anchor seats 31 are connected to the corresponding hinge wheels 11 of the base through the rotating holes 32 at the ends. A fastening groove 33 is arranged inside the anchor seat 31. The fastening groove 33 includes a wedge-shaped groove 34 at the front and a spherical wave groove 35 at the rear. The two ends of the carbon fiber plate 2 extend into the fastening groove 33 in the middle of the left and right anchor heads respectively. Two tensioning screws 4 pass through the bolt holes on the left and right sides of the base 1 respectively, and the ends of the two tensioning screws 4 are respectively connected to the fixing plate 5. A plurality of resistance stripes 37 are arranged on the surface of the fastening groove 33 of the anchor seat. Several reinforced bases 7 can be set at the rear of the base according to the actual installation tension strength requirements. Several bolt holes are set on the left and right sides of the reinforced base 7 respectively. The tensioning screw 4 passes through the bolt holes on the left and right sides of the reinforced base so that the base 1 is connected to the reinforced base 7.

[0026] Installation and use process of this utility model:

[0027] 1. According to the design requirements, determine the length of the carbon fiber plate, extend the two ends of the multi-layer carbon fiber plate into the fastening groove between the left and right anchor heads in the factory, pre-install the carbon fiber plate and the anchor, and then transport it to the installation site. The wedge-shaped groove in the front of the anchor head fastening groove can increase the front pressure of the carbon fiber plate and improve the connection firmness of the carbon plate. The spherical corrugated groove in the rear of the fastening groove can increase the horizontal cross-sectional area of ​​the carbon plate, enhance friction resistance, and prevent the shear strength damage between the carbon plate layers to the greatest extent, ensuring the tensile strength of the carbon plate.

[0028] 2. During on-site installation, determine the center line, drill holes and plant the rebar (the drilling depth is 8-10 times the diameter of the rebar; inject rebar planting glue into the hole and implant 8.8-grade strength fastening bolts 6).

[0029] 3. The utility model can realize unidirectional tensioning at any one end. According to the actual installation situation, the base of one end is determined as the tensioning end, and the base of the other end is the fixed end. Then, according to the strength requirements, the corresponding reinforced base is set at the rear of the base, and the tensioning end and the fixed end base and the reinforced base are installed. The fixed plate is installed at the end of the tensioning end, and the carbon plate and the anchor head are hung.

[0030] 4. Glue coating on carbon plate.

[0031] 5. Install the tensioning tool (jack) at the tensioning end. The bottom of the tensioning cylinder is against the fixed plate. The piston rod of the cylinder pushes the base at the tensioning end to move, and the carbon plate is tensioned in stages. During the tensioning process, the hinge connection between the base and the anchor head is automatically adjusted to compensate for the installation deviation of the tensioning base, keep the carbon plate straight, and ensure that the tensioning strength of the carbon plate is maximized.

[0032] 6. Utilize concrete structure deformation monitoring to achieve both reinforcement and monitoring.

[0033] 7. After tensioning is completed, dismantle the tensioning system, remove the jacks, screws, nuts and fixing plates, and use pressure plates to fix them on the concrete surface to ensure that the surface of the concrete structure is smooth and clean.

[0034] 8. After the beam body is painted, the bases on both sides are sealed separately.

Claims

1. A spherical wave friction resistance increasing type variable tension direction multi-layer carbon fiber plate prestressed reinforcement system, characterized by It includes two left and right bases, several layers of carbon fiber plates, two left and right anchor heads and a fixing plate. Several bolt holes are respectively arranged on the left and right sides of the base. A hinge wheel is respectively arranged on the upper and lower front ends of each base. Each anchor head has two upper and lower anchor seats connected by bolts. The anchor seat is connected to the corresponding hinge wheel of the base through the rotating hole at the end. A fastening groove is arranged inside the anchor seat. The fastening groove includes a wedge-shaped groove at the front and a spherical corrugated groove at the rear. Both ends of the carbon fiber plate extend into the fastening groove in the middle of the left and right anchor heads respectively. Two tensioning screws pass through the bolt holes on the left and right sides of the base respectively, and the ends of the two tensioning screws are respectively connected to the fixing plate.

2. The spherical waveform friction increasing variable tension direction multi-layer carbon fiber plate prestressed reinforcement system according to claim 1 is characterized by: A plurality of resistance stripes are arranged on the surface of the fastening groove of the anchor seat.

3. The spherical waveform friction increasing variable tension direction multi-layer carbon fiber plate prestressed reinforcement system according to claim 1 is characterized by: Several reinforced bases can be set at the rear of the base according to the actual installation tension strength requirements. Several bolt holes are set on the left and right sides of the reinforced base respectively. The tensioning screw passes through the bolt holes on the left and right sides of the reinforced base so that the base is connected to the reinforced base.

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