A multi-layer FRP plate composite anchor and its preparation method

Abstract

This application discloses a multi-layer FRP board composite anchor and its preparation method. An outer sleeve has an injection hole on its side wall, located near a first insertion groove. An inner sleeve is slidably connected to the inner wall of the outer sleeve, and a second insertion groove corresponding to the first insertion groove is located at one end of the inner sleeve near the top of the outer sleeve. A positioning block is fixedly installed inside the inner sleeve, located on the side of the inner sleeve away from the concrete beam, and has multiple positioning grooves spaced along its height. The positioning grooves correspond to and communicate with the second insertion grooves. The height of the positioning grooves near the second insertion groove is the same as the thickness of the FRP board, and the height of the side away from the second insertion groove gradually increases along the projection of the vertical plane. Multiple push bolts are located circumferentially on the side of the gap away from the concrete beam. This application spreads out the ends of the multi-layer FRP board, increasing the bonding area of ​​the FRP board, and combines adhesive anchors and clamping anchors to perform three-stage anchoring of the FRP board, resulting in better anchoring effect.

Description

Technical Field

[0001] This application relates to the field of anchor technology, and in particular to a multi-layer FRP plate composite anchor and its preparation method. Background Technology

[0002] Carbon fiber sheets are a high-performance composite material, primarily composed of carbon fibers. These fibers are formed by stacking organic fibers, such as sheet-like graphite microcrystals, along the fiber axis. Through a special processing technique, carbon fibers are combined with resin to create sheets. Carbon fiber sheets achieve high load-bearing capacity and large spans, enabling them to reach greater ultimate load-bearing capacity under the same cross-sectional conditions.

[0003] Currently, existing carbon fiber plate anchors exhibit high efficiency when anchoring thin, single-layer carbon fiber plates. However, when using thicker carbon fiber plates or multiple parallel single-layer carbon fiber plates, the anchoring efficiency decreases significantly.

[0004] Most existing anchors used for FRP (fiberglass reinforced plastic) plates are clamping anchors. Clamping anchors rely on the conical clamping plates to generate circumferential pressure on the FRP plate, thus clamping and anchoring the prestressed plate. However, when clamping anchors are under prolonged operation with high fatigue stress amplitude, they are prone to shearing effects, leading to shear failure of the FRP plate. Furthermore, although efficient anchoring can be achieved through the friction between the clamping groove and the carbon fiber plate, and the lateral preload, the lateral preload may decrease or even disappear with long-term use or when the anchor is subjected to sudden stress changes causing material fatigue damage. The friction will also decrease, causing slippage between the carbon fiber plate and the clamping groove, significantly reducing the anchoring effect or even leading to complete loss of anchoring effectiveness. Summary of the Invention

[0005] This application provides a multi-layer FRP plate composite anchor and its manufacturing method. It solves the technical problem in the prior art where slippage easily occurs between the carbon fiber plate and the clamping groove when anchoring multi-layer FRP plates, reducing the anchoring effect.

[0006] In a first aspect, embodiments of this application provide a multi-layer FRP plate composite anchor, including an outer sleeve, an inner sleeve, a positioning block, multiple clamping components, and multiple pushing bolts; the bottom of the outer sleeve abuts against a concrete beam, forming a gap with the concrete beam; multiple first insertion slots are provided on the side of the gap away from the concrete beam, and the multiple first insertion slots are spaced apart along their height direction; the top of the outer sleeve is an open structure, and the side wall of the outer sleeve is provided with an injection hole, the injection hole being close to the first insertion slot; the inner sleeve is slidably connected to the inner wall of the outer sleeve, its length being less than the length of the outer sleeve, and the end of the inner sleeve near the top of the outer sleeve is provided with a second insertion slot corresponding to the first insertion slot; the first... The height of the first insertion slot is equal to the thickness of the FRP board, and the height of the second insertion slot is greater than the thickness of the FRP board; the positioning block is fixedly disposed inside the inner sleeve and located on the side of the inner sleeve away from the concrete beam, and is provided with multiple positioning slots at intervals along its height; the positioning slots correspond to and communicate with the second insertion slots, the height of the positioning slots on the side closer to the second insertion slot is the same as the thickness of the FRP board, and the height on the side away from the second insertion slot gradually increases along the projection of the vertical plane; multiple clamping members are configured to be inserted into the multiple positioning slots and are located on both sides of the FRP board to clamp the FRP board; multiple jacking bolts are disposed circumferentially on the side of the gap away from the concrete beam and are configured to push the inner sleeve to move.

[0007] In conjunction with the first aspect, in one possible implementation, the inner sleeve includes a first sleeve and a second sleeve; the first sleeve and the second sleeve are mated together, and both the first sleeve and the second sleeve are slidably connected to the inner wall of the outer sleeve; a second insertion groove is provided at the end of the first sleeve that is close to the first insertion groove and away from the second sleeve; the positioning block is fixedly disposed inside the second sleeve.

[0008] In conjunction with the first aspect, in one possible implementation, the multi-layer FRP plate composite anchor further includes multiple support platforms; the multiple support platforms are fixedly disposed inside the first sleeve and spaced apart along the height direction of the first sleeve, the gaps formed between the support platforms and the inner wall of the inner sleeve, and between the support platforms, are connected to the second insertion groove, and the height of the gaps is greater than the thickness of the FRP plate, and the support platforms are configured to support the FRP plate.

[0009] In conjunction with the first aspect, in one possible implementation, a plurality of the aforementioned supports are symmetrically arranged on both sides of the first sleeve.

[0010] In conjunction with the first aspect, in one possible implementation, the multi-layer FRP composite anchor further includes a limiting device; the limiting device is disposed between the inner sleeve and the outer sleeve and is configured to prevent the inner sleeve from rotating when it moves.

[0011] In conjunction with the first aspect, in one possible implementation, the inner sleeve has a limiting boss on its side wall; the outer sleeve has a limiting groove on its side wall corresponding to the limiting boss.

[0012] In conjunction with the first aspect, in one possible implementation, the multi-layer FRP composite anchorage further includes a cover plate; the cover plate is disposed at the end of the outer sleeve away from the concrete beam.

[0013] In conjunction with the first aspect, in one possible implementation, the bottom of the outer sleeve includes a base plate and two parallel connecting plates perpendicularly connected to the base plate; one end of the connecting plate away from the base plate abuts against a concrete beam; the side of the base plate facing the concrete beam is provided with a plurality of second insertion slots and a plurality of jacking bolts.

[0014] Secondly, embodiments of this application provide a method for manufacturing a multi-layer FRP plate composite anchor, which, based on the above-mentioned multi-layer FRP plate composite anchor, includes:

[0015] Create a 3D solid model of the outer sleeve, inner sleeve, and clamping parts, and then 3D print the 3D solid model to obtain the outer sleeve, inner sleeve, and clamping parts;

[0016] Multiple jacking bolts are evenly installed on the circumference of the side of the gap away from the concrete beam.

[0017] The multilayer FRP board is passed through the first insertion slot, the second insertion slot, and the positioning slot respectively;

[0018] After applying a preload to the expected preload on the FRP sheet, the clamps are installed on both sides of each FRP sheet to achieve the first anchoring.

[0019] One end of the inner sleeve near the top of the outer sleeve abuts against the push bolt. Rotating the push bolt causes the inner sleeve to move away from the first insertion groove, thereby increasing the clamping force between the clamping member and the FRP plate and achieving a second anchoring.

[0020] After the inner sleeve moves, the injection hole is positioned between the first insertion groove and the second insertion groove. Adhesive is injected through the injection hole and enters the inner sleeve through the second insertion groove. After the adhesive cures, the third anchoring is achieved, and a multi-layer FRP composite anchor is obtained.

[0021] In conjunction with the second aspect, in one possible implementation, 3D printing includes the following steps:

[0022] Use modeling software to create a model of the part to be printed, and then export the model as an STL file.

[0023] Import the STL format file into 3D printing slicing software for slicing to obtain slice data; then print the slice data using a 3D printer.

[0024] One or more technical solutions provided in the embodiments of this application have at least the following technical effects:

[0025] The multi-layer FRP board composite anchor provided in this application includes an outer sleeve, an inner sleeve, a positioning block, multiple clamping components, and multiple push bolts. In actual operation, the inner sleeve is fitted inside the outer sleeve. The multi-layer FRP boards are inserted into multiple first insertion slots of the outer sleeve and pass through the second insertion slot and positioning slot of the inner sleeve. After applying a preload to the expected preload to the FRP boards, the clamping components are installed in the gaps on both sides of each layer of FRP board, thus achieving the first anchoring. The end of the inner sleeve near the top of the outer sleeve abuts against the push bolt. Rotating the push bolt causes the inner sleeve to move away from the first insertion slot, increasing the compressive force between the clamping components and the FRP board, thus achieving the second anchoring. After the inner sleeve moves, the glue injection hole is located between the first and second insertion slots. Adhesive is injected through the glue injection hole, and the adhesive enters the inner sleeve through the second insertion slot. After the adhesive cures, the third anchoring is achieved. In this embodiment, the inner sleeve is shorter than the outer sleeve. The jacking bolt moves the inner sleeve away from the first insertion groove. The FRP sheet is subjected to both a lateral tightening prestress and a force opposite to the tightening prestress. This increases the pressure between the clamping member and the FRP sheet as the inner sleeve moves, achieving a second anchoring. In this embodiment, the height of the second insertion groove is greater than the thickness of the FRP sheet, allowing the adhesive to enter the inner sleeve through the second insertion groove. Therefore, the multi-layer FRP sheet composite anchor of this embodiment spreads out the ends of the multi-layer FRP sheet, increasing the bonding area of ​​the FRP sheet. By combining adhesive anchors and clamping anchors, the FRP sheet is anchored three times, improving the anchoring effect. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1This is a structural schematic diagram of a multi-layer FRP plate composite anchor provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the outer sleeve provided in an embodiment of this application;

[0029] Figure 3 A right view of the outer sleeve provided in an embodiment of this application;

[0030] Figure 4 Schematic diagram of the structure of the first sleeve provided in the embodiments of this application Figure 1 ;

[0031] Figure 5 Schematic diagram of the structure of the first sleeve provided in the embodiments of this application Figure 2 ;

[0032] Figure 6 This is a schematic diagram of the structure of the second sleeve provided in an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the structure of the clamping member provided in the embodiment of this application.

[0034] Reference numerals: 1-Outer sleeve; 11-First insertion groove; 12-Injection hole; 13-Base plate; 14-Connecting plate; 2-Inner sleeve; 21-First sleeve; 22-Second sleeve; 23-Second insertion groove; 3-Positioning block; 31-Positioning groove; 4-Clamping component; 5-Push bolt; 6-Limiting device; 61-Limiting boss; 611-First boss; 612-Second boss; 62-Limiting groove; 7-Support platform; 8-FRP plate; 9-Gap; 10-Cover plate. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0037] This application provides a multi-layer FRP plate composite anchor, such as... Figures 1 to 7 As shown. This multi-layer FRP board composite anchor includes an outer sleeve 1, an inner sleeve 2, a positioning block 3, multiple clamping parts 4, and multiple pushing bolts 5. The bottom of the outer sleeve 1 abuts against the concrete beam, forming a gap 9 with the concrete beam. Multiple first insertion slots 11 are provided on the side of the gap 9 away from the concrete beam, and the multiple first insertion slots 11 are spaced apart along their height direction. The top of the outer sleeve 1 is an open structure, and the side wall of the outer sleeve 1 is provided with an injection hole 12, which is close to the first insertion slot 11. In this embodiment, the injection hole 12 is close to the first insertion slot 11, and the inner sleeve 2 moves toward the side away from the concrete beam, so that the injection hole 12 is located between the first insertion slot 11 and the second insertion slot 23, which facilitates the injection of adhesive. During injection, the height of the first insertion slot 11 is the same as the thickness of the FRP board 8, so that the adhesive flows into the inner sleeve 2 along the gap between the FRP board 8 and the second insertion slot 23.

[0038] The inner sleeve 2 is slidably connected to the inner wall of the outer sleeve 1, and its length is less than that of the outer sleeve 1. A second insertion groove 23 corresponding to the first insertion groove 11 is provided at one end of the inner sleeve 2 near the top of the outer sleeve 1. The height of the first insertion groove 11 is equal to the thickness of the FRP plate 8, and the height of the second insertion groove 23 is greater than the thickness of the FRP plate 8. A positioning block 3 is fixedly disposed inside the inner sleeve 2, located on the side of the inner sleeve 2 away from the concrete beam, and has multiple positioning grooves 31 spaced along its height. The positioning grooves 31 correspond to and communicate with the second insertion grooves 23. The height of the positioning groove 31 on the side near the second insertion groove 23 is the same as the thickness of the FRP plate 8, and the height on the side away from the second insertion groove 23 gradually increases along the projection of the vertical plane. Multiple clamping members 4 are configured to insert into the multiple positioning grooves 31 and are located on both sides of the FRP plate 8 to clamp the FRP plate 8. In this embodiment, one end of the clamping member 4 is thinner, and the other end is thicker; the thicker side is installed on the end of the positioning block 3 away from the concrete beam. The thinner side is installed at the end of the positioning block 3 near the concrete beam.

[0039] Multiple push bolts 5 are located circumferentially on the side of the gap 9 away from the concrete beam and are configured to push the inner sleeve 2 to move.

[0040] The adhesive in this embodiment can be high-performance epoxy resin, and the outer sleeve 1, inner sleeve 2, and clamping member 4 can be made of carbon fiber reinforced composite material. The push bolt 5 can be made of corrosion-resistant aluminum alloy.

[0041] Specifically, in this embodiment of the application, there are five first insertion slots 11, five corresponding second insertion slots 23, and ten clamping members 4, which are located on both sides of the FRP plate 8.

[0042] This application utilizes 3D printing technology to fabricate multi-layer FRP plate composite anchors, enabling integrated molding of complex structures and improving the precision of these anchors. The 3D-printed multi-layer FRP plate composite anchors use carbon fiber composite materials instead of steel, offering advantages such as light weight, high strength, corrosion resistance, and aging resistance. Furthermore, the carbon fiber composite material exhibits excellent stiffness matching with FRP, superior resistance to thermal shock and friction, and superior anchoring performance.

[0043] It should be noted that in actual operation, the inner sleeve 2 is fitted inside the outer sleeve 1. The multi-layer FRP sheets 8 are inserted into the multiple first insertion slots 11 of the outer sleeve 1, and then through the corresponding second insertion slot 23 and positioning slot 31 of the inner sleeve 2. After applying a pre-tightening force to the expected pre-tightening force to the FRP sheets 8, the clamping member 4 is installed in the gaps on both sides of each layer of FRP sheets 8. At this time, the first anchoring is achieved. The end of the inner sleeve 2 near the top of the outer sleeve 1 abuts against the push bolt 5. Rotating the push bolt 5 causes the inner sleeve 2 to move away from the first insertion slot 11, thereby increasing the squeezing force between the clamping member 4 and the FRP sheet 8. At this time, the second anchoring is achieved. After the inner sleeve 2 moves, the glue injection hole 12 is located between the first insertion slot 11 and the second insertion slot 23. Adhesive is injected through the glue injection hole 12, and the adhesive enters the inner sleeve 2 through the second insertion slot 23. After the adhesive cures, the third anchoring is achieved. In this embodiment, the length of the inner sleeve 2 is less than the length of the outer sleeve 1. The push bolt 5 drives the inner sleeve 2 to move away from the first insertion groove 11. The FRP plate 8 is subjected to both a lateral tightening prestress and a force opposite to the tightening prestress, which increases the compressive force between the clamping member 4 and the FRP plate 8 when the inner sleeve 2 moves, thereby achieving a second anchoring. In this embodiment, the height of the second insertion groove 23 is greater than the thickness of the FRP plate 8, allowing the adhesive to enter the inner sleeve 2 through the second insertion groove 23.

[0044] The main component of existing bonded anchors is a metal sleeve. The FRP plate 8 and the metal sleeve are bonded together using resin or other adhesive materials. After the adhesive reaches its design strength, prestress is applied to the FRP plate 8 by tensioning the metal sleeve with a jack. Bonded anchors have a large anchorage length, long adhesive curing time, and poor creep resistance, making them unsuitable for locations requiring rapid anchoring or in confined spaces. Existing clamping anchors mainly rely on the conical clamping plates to generate circumferential pressure on the FRP plate 8, thus creating a clamping effect and anchoring the prestressed plate. However, when clamping anchors are under prolonged operation with large fatigue stress amplitudes, they are prone to shearing effects, leading to shear failure of the FRP plate 8. Meanwhile, although efficient anchoring can be achieved through the friction between the clamping groove and the carbon fiber plate and the lateral preload, the lateral preload may decrease or even disappear when the anchor is subjected to sudden stress changes leading to material fatigue damage. The friction will also decrease, causing slippage between the carbon fiber plate and the clamping groove, thus significantly reducing the anchoring effect or even causing complete loss of anchoring effectiveness. The multi-layer FRP plate composite anchor of this application spreads out the ends of the multi-layer FRP plate 8, increasing the bonding area of ​​the FRP plate 8, and combines adhesive and clamping anchors to perform three-stage anchoring of the FRP plate 8, thereby improving the anchoring effect.

[0045] In this embodiment, the inner sleeve 2 includes a first sleeve 21 and a second sleeve 22. The first sleeve 21 and the second sleeve 22 are mated together, and both the first sleeve 21 and the second sleeve 22 are slidably connected to the inner wall of the outer sleeve 1. A second insertion groove 23 is provided at the end of the first sleeve 21 that is close to the first insertion groove 11 and away from the second sleeve 22. The positioning block 3 is fixedly disposed inside the second sleeve 22. In this embodiment, the first sleeve 21 is an adhesive anchor and the second sleeve 22 is an anchor-type anchor. This application combines adhesive anchors and clamping anchors, performing three anchoring operations on the FRP plate 8, thereby improving the anchoring effect of the anchors. In this application, the first sleeve 21 and the second sleeve 22 are manufactured separately for ease of processing.

[0046] In this embodiment, the height of the positioning groove 31, facing away from the second insertion groove 23, gradually increases along the projection of the vertical plane. When the FRP plate 8 is inserted into the positioning groove 31, the distance between the top surface of the FRP plate 8 and the top wall of the positioning groove 31, and the distance between the bottom surface of the FRP plate 8 and the bottom wall of the positioning groove 31, both gradually increase along the projection of the vertical plane towards the side away from the second insertion groove 23. At this time, the thinner end of the clamping member 4 is inserted from the end of the second sleeve 22 away from the first sleeve 21, so that the thicker end of the clamping member 4 is located at the end of the second sleeve 22 away from the first sleeve 21. Therefore, the FRP plate 8, the clamping member 4, and the positioning groove 31 fit perfectly without gaps, thereby achieving the first anchoring.

[0047] In this embodiment, the multi-layer FRP plate composite anchor also includes multiple support platforms 7. The multiple support platforms 7 are fixedly disposed within the first sleeve 21 and spaced apart along the height direction of the first sleeve 21. The gaps formed between the support platforms 7 and the inner wall of the inner sleeve 2, and between the support platforms 7 themselves, are connected to the second insertion groove 23, and the height of the gaps is greater than the thickness of the FRP plate 8. The support platforms 7 are configured to support the FRP plate 8. In this embodiment, the support platforms 7 serve a limiting function.

[0048] In this embodiment, multiple bearing platforms 7 are symmetrically arranged on both sides of the first sleeve 21. In this embodiment, there can be eight bearing platforms 7, four on each side of the first sleeve 21. This serves both to limit the position of the FRP plate 8 and to save materials, facilitating the injection of adhesive, resulting in better adhesion between the FRP plate 8 and the adhesive, and improving the anchoring effect.

[0049] Of course, the embodiments of this application are not limited to the above structure. The two ends of the support 7 in the embodiments of this application can also be connected to the two side walls of the first sleeve 21.

[0050] In this embodiment, the multi-layer FRP composite anchor also includes a limiting device 6. The limiting device 6 is disposed between the inner sleeve 2 and the outer sleeve 1 and is configured to prevent the inner sleeve 2 from rotating when it moves.

[0051] In this embodiment, the inner sleeve 2 has a limiting boss 61 on its side wall. The outer sleeve 1 has a limiting groove 62 corresponding to the limiting boss 61 on its side wall. In this embodiment, the inner sleeve 2 has two limiting bosses 61 on its side wall, and the outer sleeve 1 has two limiting grooves 62 corresponding to the two limiting bosses 61 on its side wall, making the overall structure more stable.

[0052] Specifically, the limiting boss 61 includes a first boss 611 and a second boss 612. The first boss 611 is provided on the side wall of the first sleeve 21, and the second boss 612 is provided on the side wall of the second sleeve 22. The first boss 611 and the second boss 612 correspond to each other and are slidably connected in the limiting groove 62 of the outer sleeve 1. When the first sleeve 21 moves and drives the second sleeve 22 to move, the cooperation of the limiting groove 62, the first boss 611 and the second boss 612 can prevent the first sleeve 21 and the second sleeve 22 from rotating.

[0053] Of course, this embodiment is not limited to the above structure. The side wall of the outer sleeve 1 is provided with a positioning boss. The side wall of the inner sleeve 2 is provided with a positioning groove corresponding to the positioning boss. The cooperation between the positioning boss and the positioning groove can prevent the inner sleeve 2 from rotating when moving, thereby making the anchoring effect better.

[0054] In this embodiment, the multi-layer FRP composite anchor also includes a cover plate 10. The cover plate 10 is disposed at the end of the outer sleeve 1 away from the concrete beam. The cover plate 10 in this embodiment can prevent dust from entering the multi-layer FRP composite anchor and also improves the aesthetics of the overall structure. In this embodiment, the cover plate 10 is hinged to the outer sleeve 1, and can be covered after anchoring is completed.

[0055] In this embodiment, the bottom of the outer sleeve 1 includes a base plate 13 and two parallel connecting plates 14 perpendicularly connected to the base plate 13. The end of the connecting plate 14 away from the base plate 13 abuts against a concrete beam. The side of the base plate 13 facing the concrete beam is provided with multiple second insertion slots 23 and multiple push bolts 5. In this embodiment, the bottom of the outer sleeve 1 has a U-shaped structure, and during installation, the two connecting plates 14 are parallel to the horizontal plane. An operator can reach into the U-shaped structure from the side to rotate the push bolts 5. In this embodiment, four push bolts 5 can be provided, distributed around the circumference of the base plate 13. The base plate 13 is provided with threads corresponding to the push bolts 5. Rotation of the push bolts 5 allows the inner sleeve 2 to move towards the end away from the concrete beam.

[0056] Of course, the two connecting plates 14 in this embodiment can also be perpendicular to the horizontal plane, and the operator can also turn the push bolt 5 from above or below.

[0057] In this embodiment of the application, a method for manufacturing a multilayer FRP plate composite anchor is provided. Based on the aforementioned multilayer FRP plate composite anchor, the method includes:

[0058] Create a three-dimensional solid model of the outer sleeve 1, inner sleeve 2, and clamping component 4, and then 3D print the three-dimensional solid model to obtain the outer sleeve 1, inner sleeve 2, and clamping component 4;

[0059] It should be noted that the positioning block 3 and the inner sleeve 2 are modeled together and formed as a single piece.

[0060] Multiple jacking bolts 5 are evenly installed in the circumference of the side of the gap 9 away from the concrete beam.

[0061] The multilayer FRP board 8 is passed through the first insertion slot 11, the second insertion slot 23 and the positioning slot 31 respectively;

[0062] After applying a preload to the expected preload to the FRP board 8, the clamping member 4 is installed on both sides of each layer of FRP board 8 to achieve the first anchoring.

[0063] The end of the inner sleeve 2 near the top of the outer sleeve 1 abuts against the push bolt 5. Rotating the push bolt 5 causes the inner sleeve 2 to move away from the first insertion groove 11, thereby increasing the clamping force between the clamping member 4 and the FRP plate 8 and achieving the second anchoring.

[0064] After the inner sleeve 2 moves, the glue injection hole 12 is located between the first insertion groove 11 and the second insertion groove 23. Adhesive is injected through the glue injection hole 12 and enters the inner sleeve 2 through the second insertion groove 23. After the adhesive cures, the third anchoring is achieved, and a multi-layer FRP composite anchor is obtained.

[0065] In this embodiment of the application, 3D printing includes the following steps:

[0066] Use modeling software to create a model of the part to be printed, and then export the model as an STL file.

[0067] Import the STL format file into 3D printing slicing software for slicing to obtain slice data; then print the slice data using a 3D printer.

[0068] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0069] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A multi-layer FRP plate composite anchor, characterized in that, Includes outer sleeve (1), inner sleeve (2), positioning block (3), and multiple One clamping element (4) and multiple push bolts (5); The bottom of the outer sleeve (1) abuts against the concrete beam and forms a gap (9) with the concrete beam; The gap (9) is provided with a plurality of first insertion slots (11) on the side away from the concrete beam, and the plurality of first insertion slots (11) are spaced apart along its height direction. The top of the outer sleeve (1) is an open structure, and the side wall of the outer sleeve (1) is provided with an injection hole (12), which is close to the first insertion slot (11). The inner sleeve (2) is slidably connected to the inner wall of the outer sleeve (1), and its length is less than the length of the outer sleeve (1). The inner sleeve (2) is provided with a second insertion groove (23) corresponding to the first insertion groove (11) at one end near the top of the outer sleeve (1). The height of the first insertion slot (11) is equal to the thickness of the FRP board (8), and the height of the second insertion slot (23) is greater than the thickness of the FRP board (8). The positioning block (3) is fixedly installed inside the inner sleeve (2) and located on the side of the inner sleeve (2) away from the concrete beam, and is provided with multiple positioning grooves (31) at intervals along its height. The positioning groove (31) corresponds to and is connected to the second insertion groove (23). The height of the side of the positioning groove (31) close to the second insertion groove (23) is the same as the thickness of the FRP board (8), and the height of the side away from the second insertion groove (23) gradually increases along the projection of the vertical plane. Multiple clamping members (4) are configured to insert into multiple positioning slots (31) and are located on both sides of the FRP plate (8) to clamp the FRP plate (8); Multiple push bolts (5) are provided circumferentially on the side of the gap (9) away from the concrete beam and are configured to push the inner sleeve (2) to move; The inner sleeve (2) includes a first sleeve (21) and a second sleeve (22); The first sleeve (21) is connected to the second sleeve (22), and both the first sleeve (21) and the second sleeve (22) are slidably connected to the inner wall of the outer sleeve (1); The first sleeve (21) is close to the first insertion groove (11), and a second insertion groove (23) is provided at the end away from the second sleeve (22); The positioning block (3) is fixedly disposed inside the second sleeve (22); It also includes multiple foundations (7); Multiple support platforms (7) are fixedly disposed inside the first sleeve (21) and spaced apart along the height direction of the first sleeve (21). The gap formed between the support platform (7) and the inner wall of the inner sleeve (2), and between the support platform (7) and the support platform (7), is connected to the second insertion groove (23). The height of the gap is greater than the thickness of the FRP plate (8). The support platform (7) is configured to support the FRP plate (8). Multiple support platforms (7) are symmetrically arranged on both sides of the first sleeve (21); It also includes a limiting device (6); The limiting device (6) is disposed between the inner sleeve (2) and the outer sleeve (1) and is configured to prevent the inner sleeve (2) from rotating when it moves; The inner sleeve (2) is provided with a limiting boss (61) on its side wall; The side wall of the outer sleeve (1) is provided with a limiting groove (62) corresponding to the limiting boss (61); It also includes a cover plate (10); the cover plate (10) is disposed at the end of the outer sleeve (1) away from the concrete beam; The bottom of the outer sleeve (1) includes a base plate (13) and two parallel connecting plates (14) that are perpendicularly connected to the base plate (13); The end of the connecting plate (14) away from the bottom plate (13) abuts against the concrete beam; The base plate (13) is provided with multiple second insertion slots (23) and multiple push bolts (5) on the side facing the concrete beam.

2. A method for preparing a multi-layer FRP plate composite anchor, characterized in that, The multi-layer FRP plate composite anchorage according to claim 1 includes: Establish a three-dimensional solid model of the outer sleeve (1), inner sleeve (2), and clamping part (4), and then 3D print the three-dimensional solid model to obtain the outer sleeve (1), inner sleeve (2) and clamping part (4); Multiple jacking bolts (5) are evenly installed in the circumference of the gap (9) on the side away from the concrete beam; The multilayer FRP board (8) is passed through the first insertion slot (11), the second insertion slot (23), and the positioning slot (31) respectively; After applying a preload to the FRP board (8) to the expected preload, the clamp (4) is installed on both sides of each layer of FRP board (8) to achieve the first anchoring. One end of the inner sleeve (2) near the top of the outer sleeve (1) abuts against the push bolt (5). Rotating the push bolt (5) causes the inner sleeve (2) to move away from the first insertion groove (11) to increase the clamping force between the clamping member (4) and the FRP plate (8) and achieve the second anchoring. After the inner sleeve (2) moves, the glue injection hole (12) is located between the first insertion groove (11) and the second insertion groove (23). Adhesive is injected through the glue injection hole (12), and the adhesive enters the inner sleeve (2) through the second insertion groove (23). After the adhesive is cured, the third anchoring is achieved, and a multi-layer FRP board (8) composite anchor is obtained.

3. The method for preparing the multi-layer FRP plate composite anchor according to claim 2, characterized in that 3D printing... include: Use modeling software to create a model of the part to be printed, and then export the model as an STL file. Import the STL format file into 3D printing slicing software for slicing to obtain slice data; then print the slice data using a 3D printer.

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