Fiber-reinforced anchor rod

Abstract

The utility model discloses a kind of fiber reinforced type anchor rods, including basalt fiber rod body, anchor head, axial enhancement unit, annular restraint component and end connecting mechanism, and the outer wall of basalt fiber rod body has reinforcing rib. Anchor head is located at the front end of basalt fiber rod body. Axial enhancement unit is located inside basalt fiber rod body, including central carbon fiber rod and multiple basalt fiber bundles, and central carbon fiber rod is coaxially arranged with basalt fiber rod body. Multiple basalt fiber bundles are evenly arranged in the outside of central carbon fiber rod in parallel. Annular restraint component includes elastic filler and multiple radial constraint rings, and all radial constraint rings are sleeved on the outside of central carbon fiber rod and all basalt fiber bundles, and elastic filler is filled in the inside of basalt fiber rod body. End connecting mechanism is located at the rear end of basalt fiber rod body. The utility model's basalt fiber rod body is greatly improved, material and manufacturing cost are low, construction is simple, service life is long, and reliable.

Description

Technical Field

[0001] This utility model relates to the field of mine roadway support technology, specifically to a fiber-reinforced anchor bolt. Background Technology

[0002] Anchor bolts are a crucial component of geotechnical engineering support technology, and their performance directly impacts the durability and safety of engineering structures. Currently, metal anchor bolts are the most widely used in my country, but traditional metal anchor bolts suffer from several problems: susceptibility to corrosion, heavy weight, complex construction, and difficulty in cutting. In corrosive environments such as high humidity and high salinity, the service life of traditional metal anchor bolts is shortened, and maintenance costs increase. Basalt fiber materials, with their lightweight, high strength, corrosion resistance, and good heat resistance, are gradually replacing metal materials in anchor bolt manufacturing. Currently, most basalt fiber anchor bolts in my country are solid structures. While this reduces corrosion, it introduces new problems: higher material consumption and cost. Some technical solutions use hollow designs, but while this reduces weight, the lack of internal reinforcement leads to insufficient overall shear and bending resistance. Existing reinforcement methods for hollow basalt fiber anchor bolts also have significant shortcomings. The first method relies on external grouting. Grouting increases anchoring force, but it easily creates voids and uneven material distribution, and also increases construction steps. The second method involves filling the interior with a single material, such as fiber bundles or foam. This method struggles to simultaneously improve multiple mechanical properties, and the outer surface of the anchor bolt is prone to slippage and failure under shear and tensile forces, reducing the anchoring effectiveness.

[0003] Chinese Patent CN1962731A discloses a fiber-reinforced resin anchor bolt. The reinforcing body of this anchor bolt is composed of a mixture of basalt fiber and carbon fiber, with carbon fiber accounting for 10%–50% of the total mass of the reinforcing body. This fully utilizes the advantages of high tensile strength of carbon fiber and high elongation at break of basalt fiber, improving the elongation at break and tensile strength of the anchor bolt. However, the anchor bolt uses a solid structure, resulting in high material costs. Chinese Patent CN202559348U discloses a fully threaded fiber-reinforced hollow plastic anchor bolt, including an anchor bolt body with regular threads throughout. The anchor bolt body is cylindrical and hollow, reducing costs. However, its mechanical performance improvement is limited; it cannot absorb impact energy and has poor resistance to bending deformation. Therefore, the existing technology urgently needs further improvement. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a fiber-reinforced anchor rod, which solves the problems of high material cost, relatively low tensile and bending mechanical properties, inability to absorb impact energy, poor resistance to bending deformation, and relatively complex manufacturing and construction of existing basalt fiber resin anchor rods.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A fiber-reinforced anchor bolt includes a basalt fiber rod body, an anchor head, an axial reinforcement unit, a circumferential restraint assembly, and an end connection mechanism. The basalt fiber rod body is a hollow straight rod body with open ends, and its outer circumferential wall has spirally distributed reinforcing ridges.

[0007] The anchor head is located at the front end of the basalt fiber rod and closes the front end of the basalt fiber rod.

[0008] The axial reinforcement unit is set inside the basalt fiber rod body, which includes a central carbon fiber rod and multiple basalt fiber bundles. The central carbon fiber rod is arranged coaxially with the basalt fiber rod body.

[0009] Multiple basalt fiber bundles are evenly arranged on the outside of the central carbon fiber rod. The front end of each basalt fiber bundle is connected to the anchor head, and the rear end is connected to the basalt fiber rod body through the anchoring component.

[0010] The circumferential constraint assembly includes an elastic filler and multiple radial constraint rings. All radial constraint rings are sleeved on the outside of the central carbon fiber rod and all basalt fiber bundles and are arranged at intervals along the axial direction of the central carbon fiber rod. The elastic filler is filled between the inner wall of the central carbon fiber rod and the basalt fiber rod.

[0011] The end connection mechanism is located at the rear end of the basalt fiber rod and is detachably and fixedly connected to it.

[0012] Furthermore, the basalt fiber rod, reinforcing ridge, and anchor head are made of continuous basalt fiber and epoxy resin through a casting molding process, and the cross-section of the reinforcing ridge is an isosceles trapezoid.

[0013] The anchor head is a cone shape and is coaxially arranged with the basalt fiber rod. The bottom diameter of the anchor head is larger than the outer diameter of the basalt fiber rod.

[0014] The large-diameter end of the anchor head is fixedly connected to the front end of the basalt fiber rod, and the anchor head, reinforcing ridge and basalt fiber rod are integrally formed.

[0015] Furthermore, the central carbon fiber rod is a cylinder with a uniform cross-section, and its outer circumference has receiving grooves that are equal in number and correspond one-to-one in position to the basalt fiber bundles. All receiving grooves are evenly distributed on the circumference with the axis of the central carbon fiber rod as the center.

[0016] Each of the basalt fiber bundles is embedded in its corresponding receiving groove and arranged in parallel.

[0017] Furthermore, the central carbon fiber rod has radial perforations at both ends, and each radial perforation is provided with a fixing pin. The two ends of the fixing pin are inserted into the interior of the basalt fiber rod and are fixedly connected to the basalt fiber rod.

[0018] Furthermore, multiple sets of guide grooves of different lengths are formed on the inner circumference of the basalt fiber rod. Each set of guide grooves includes two guide grooves symmetrically arranged about the axis of the basalt fiber rod. The guide grooves are evenly distributed at equal intervals along the circumference of the basalt fiber rod.

[0019] Furthermore, the cross-section of the guide groove is square, and the number of guide groove sets is equal to the number of radial constraint rings and they correspond one-to-one.

[0020] The radial constraint ring is disc-shaped, with two guide sliders symmetrically arranged on its outer edge. The two guide sliders are located in two opposite guide grooves. Each radial constraint ring is positioned on the inner side of the basalt fiber rod by the two guide sliders on its side.

[0021] Furthermore, the radial constraint ring has a central circular hole on its inner side that matches the central carbon fiber rod. The inner edge of the radial constraint ring adjacent to the central circular hole has a semi-circular arc groove that is equal in number to the number of receiving grooves and whose positions correspond one-to-one. The semi-circular arc grooves on the inner side of each radial constraint ring constrain the basalt fiber bundles into the corresponding receiving grooves of the central carbon fiber rod.

[0022] Furthermore, the anchoring assembly includes an anchor plate and multiple pairs of clips, with the anchor plate located behind the central carbon fiber rod and engaged at the shoulder of a hole inside the basalt fiber rod.

[0023] The number of the clamps is equal to the number of basalt fiber bundles and their positions correspond one-to-one. The rear end of each basalt fiber bundle is fixedly connected to the anchor plate through a corresponding pair of clamps.

[0024] Furthermore, the end connection mechanism includes a connecting sleeve, a thrust washer, and a nut. The thrust washer has a circular hole in its center, and the connecting sleeve is movably inserted into the circular hole. The front end of the connecting sleeve is fitted onto the rear end of the basalt fiber rod and is threaded into it.

[0025] The nut is located on the rear side of the thrust washer and is threaded into the outer circumferential wall of the connecting sleeve.

[0026] By adopting the above technical solution, the beneficial technical effects of this utility model are as follows: The internal axial reinforcement unit of the basalt fiber rod of this utility model can improve the overall tensile mechanical properties of the anchor rod. The central carbon fiber rod provides the main tensile strength, the basalt fiber bundles assist in enhancing the axial bearing capacity, and the multiple metal constraint rings of the circumferential constraint assembly act as a skeleton to support the hollow basalt fiber rod, thereby improving the deformation resistance of the basalt fiber rod and the overall shear resistance of the anchor rod. The elastic filling layer deforms under stress, absorbs impact energy, and improves the resistance to bending deformation. The circumferential constraint assembly and axial reinforcement unit significantly improve the comprehensive mechanical properties of the basalt fiber rod, with low material and manufacturing costs, suitable for mass production, simple construction, long service life, and high reliability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first implementation of a fiber-reinforced anchor bolt according to this utility model.

[0028] Figure 2 This is an exploded view of the first implementation of a fiber-reinforced anchor bolt according to this utility model.

[0029] Figure 3 yes Figure 2 A cross-sectional view of the present invention from the AA direction.

[0030] Figure 4 yes Figure 2 A cross-sectional view of the present invention from the BB direction.

[0031] Figure 5 This is a cross-sectional view of the central carbon fiber rod of this utility model.

[0032] Figure 6 This is a schematic diagram of the radial constraint ring of this utility model.

[0033] Figure 7 This is an exploded view of a second implementation of a fiber-reinforced anchor bolt according to this utility model.

[0034] Figure 8 yes Figure 7 A cross-sectional view of the present invention from the CC direction. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings:

[0036] Example 1, combined with Figures 1 to 6A fiber-reinforced anchor bolt includes a basalt fiber rod body 1, an anchor head 2, an axial reinforcement unit, a circumferential restraint assembly, and an end connection mechanism 3. The basalt fiber rod body 1 is a hollow straight rod with open ends, an outer diameter of 20-50 mm, and a wall thickness of 3-8 mm. The outer circumference of the basalt fiber rod body 1 has spirally distributed reinforcing ridges 11 with a pitch of 15-30 mm. The anchor head 2 is located at the front end of the basalt fiber rod body 1 and closes the front end. The rear end of the basalt fiber rod body 1 has external threads on its outer circumference, which connect to the end connection mechanism 3.

[0037] Specifically, the basalt fiber rod 1, the reinforcing ridge 11, and the anchor head 2 are all made of continuous basalt fiber and epoxy resin through a casting molding process. The cross-section of the reinforcing ridge 11 is an isosceles trapezoid, and the height of the reinforcing ridge 11 relative to the outer surface of the basalt fiber rod 1 is 2-5mm.

[0038] Anchor head 2 is a cone, and the bottom diameter of anchor head 2 is larger than the outer diameter of the basalt fiber rod 1. Anchor head 2 is coaxially arranged with basalt fiber rod 1, and its pointed end is away from the front end of basalt fiber rod 1. The large diameter end of anchor head 2 is fixedly connected to the front end of basalt fiber rod 1. Anchor head 2, reinforcing rib 11 and basalt fiber rod 1 are integrally formed.

[0039] The axial reinforcement unit is disposed inside the basalt fiber rod 1, which includes a central carbon fiber rod 41 and six basalt fiber bundles 42. The central carbon fiber rod 41 is a cylinder with a uniform cross section and a diameter of 5-10 mm. The central carbon fiber rod 41 is coaxially arranged with the basalt fiber rod 1, and its front and rear ends are fixedly connected to the basalt fiber rod 1.

[0040] Specifically, the central carbon fiber rod 41 has a radial through hole 412 at both its front and rear ends. The radial through hole 412 intersects the axis of the central carbon fiber rod 41 perpendicularly. Each radial through hole 412 has a fixing pin 43 inside it. The fixing pin 43 is made of alloy material, and the distance between each fixing pin 43 and the adjacent end of the central carbon fiber rod 41 is 90mm. The two ends of the fixing pin 43 are inserted into the interior of the basalt fiber rod 1 and are fixedly connected to the basalt fiber rod 1. The basalt fiber rod 1 will not move or rotate relative to it along its axial direction.

[0041] In this embodiment, there are six basalt fiber bundles 42, each composed of 100-200 continuous basalt fiber filaments. The outer circumference of the central carbon fiber rod 41 has six receiving grooves 411, the same number and corresponding in position as the basalt fiber bundles 42. All receiving grooves 411 are evenly distributed on a circumference centered on the axis of the central carbon fiber rod 41. The cross-section of each receiving groove 411 is semi-circular, extending to both ends of the central carbon fiber rod 41.

[0042] Six basalt fiber bundles 42 are arranged in parallel and evenly on the outside of the central carbon fiber rod 41. Each basalt fiber bundle 42 is embedded in the corresponding receiving groove 411. The front end of the basalt fiber bundle 42 is inserted into the mounting hole of the anchor head 2. The front end of the basalt fiber bundle 42 is fixed in the anchor head 2 by injecting glue to obtain the connection strength with the anchor head 2. The rear end of the basalt fiber bundle 42 is fixedly connected to the basalt fiber rod 1 through the anchoring component. The basalt fiber bundle 42 can be prestressed by tensioning.

[0043] The circumferential constraint assembly includes an elastic filler 53 and a plurality of radial constraint rings 51. All radial constraint rings 51 are sleeved on the outside of the central carbon fiber rod 41 and all basalt fiber bundles 42 and are arranged at intervals along the axial direction of the central carbon fiber rod 41. The elastic filler 53 fills the space between the central carbon fiber rod 41 and the inner wall of the basalt fiber rod 1.

[0044] Specifically, the basalt fiber rod 1 has multiple sets of guide grooves 12 of different lengths on its inner circumference. Each set of guide grooves 12 includes two guide grooves 12 arranged symmetrically about the axis of the basalt fiber rod 1. The guide grooves 12 are evenly distributed at equal intervals along the circumference of the basalt fiber rod 1.

[0045] The guide groove 12 has a square cross-section, and the number of guide grooves is equal to the number of radial constraint rings 51, with each corresponding to the other. All radial constraint rings 51 are located inside the basalt fiber rod 1 and are spaced apart along the axial direction of the basalt fiber rod 1. The distance between any two adjacent radial constraint rings 51 is 200-300 mm. Guide grooves 12 of different lengths correspond to radial constraint rings 51 at different positions. Specifically, the radial constraint ring 51 is disc-shaped, with two guide sliders 52 symmetrically arranged on its outer edge. The guide sliders 52 match the cross-sectional shape of the guide groove 12, and the two guide sliders 52 are located in two opposite guide grooves 12. Each radial constraint ring 51 is positioned inside the basalt fiber rod 1 by the two guide sliders 52 on its side. During assembly, each radial constraint ring 51 can be sequentially sent to the interior of the basalt fiber rod 1 from the rear end of the basalt fiber rod 1. The two guide blocks 52 on the outer side of each radial constraint ring 51 slide to the predetermined position in the corresponding guide groove 12. The radial constraint ring 51 will not rotate relative to the basalt fiber rod 1.

[0046] The radial constraint ring 51 has a central circular hole 511 on its inner side that matches the central carbon fiber rod 41. The diameter of the central circular hole 511 is equal to the diameter of the central carbon fiber rod 41. The inner edge of the radial constraint ring 51 adjacent to the central circular hole 511 has a semi-circular arc groove 512 that is equal in number and corresponding in position to the receiving groove 411. The semi-circular arc groove 512 on the inner side of each radial constraint ring 51 constrains the basalt fiber bundle 42 within the corresponding receiving groove 411 of the central carbon fiber rod 41.

[0047] The anchoring assembly includes an anchor plate 61 and six pairs of clamps 62. The anchor plate 61 is located behind the central carbon fiber rod 41 and is engaged in the shoulder of the hole inside the basalt fiber rod 1. The number of pairs of clamps 62 is equal to the number of basalt fiber bundles 42 and their positions correspond one-to-one. The rear end of each basalt fiber bundle 42 is fixedly connected to the anchor plate 61 through a corresponding pair of clamps 62. During installation, after applying a certain tension to the rear end of each basalt fiber bundle 42, each pair of clamps 62 fixes the rear end of the corresponding basalt fiber bundle 42 to the anchor plate 61, thus fixing the rear ends of all basalt fiber bundles 42 to the basalt fiber rod 1.

[0048] In addition, the anchor plate 61 has injection holes. After the axial reinforcement unit and the circumferential restraint assembly are installed inside the basalt fiber rod 1, liquid polyurethane material is injected into the interior of the basalt fiber rod 1 through the injection holes, filling the internal space of the basalt fiber rod 1. After a certain period of reaction and curing, the liquid polyurethane material forms an elastic filler 53. The Shore hardness of the elastic filler 53 is between 60 and 80A. It is densely filled in the gap between the metal restraint ring and the inner wall of the basalt fiber rod 1 through injection molding, and the elastic filler 53 completely encapsulates the axial reinforcement unit.

[0049] The end connection mechanism 3 is located at the rear end of the basalt fiber rod 1 and is detachably and fixedly connected to it. The end connection mechanism 3 includes a connecting sleeve 31, a thrust washer 32 and a nut 33. The thrust washer 32 is made of a square steel plate with a thickness of 8-15mm, and a circular hole adapted to the connecting sleeve 31 is opened at the center of the thrust washer 32.

[0050] The connecting sleeve 31 is movably inserted into the circular hole. The front end of the connecting sleeve 31 has an internal thread. The front end of the connecting sleeve 31 is sleeved onto the outer rear end of the basalt fiber rod 1 and is fixedly connected to the threaded rear end of the basalt fiber rod 1. In addition, the nut 33 is located on the rear side of the thrust washer 32 and engages with the threaded outer circumference of the connecting sleeve 31. After the basalt fiber rod 1 is fixed inside the drilled hole in the rock wall, the nut 33 is tightened onto the outside of the connecting sleeve 31, thereby fixing the thrust washer 32 to the rock wall.

[0051] The general construction process of a fiber-reinforced anchor bolt in this embodiment is as follows: Before installation, a hole is drilled in the sidewall of the tunnel or rock and soil using drilling equipment, and the inside of the hole is cleaned. Anchoring agent is first filled into the hole, and then the assembled basalt fiber rod 1 is inserted. The anchoring agent is evenly filled into the space inside the hole by rotating the basalt fiber rod 1. After the anchoring agent solidifies, the basalt fiber rod 1 is fixed inside the hole and bonded to the rock and soil. Then, the connecting sleeve 31 is tightened to the end of the basalt fiber rod 1 located outside the rock and soil. A thrust washer 32 is installed on the outside of the connecting sleeve 31. Then, a nut 33 is screwed onto the rear end of the connecting sleeve 31 and tightened, applying prestress to the basalt fiber rod 1. The thrust washer forms a tight contact interface with the surface of the rock and soil, generating a reverse restraint force that constrains the deformation of the rock and soil.

[0052] Example 2, combined with Figure 7 and Figure 8A fiber-reinforced anchor bolt includes a basalt fiber rod body 1, an anchor head 2, and an end connection mechanism 3. The basalt fiber rod body 1 is a hollow straight rod with open ends. The outer diameter of the basalt fiber rod body 1 is 40 mm, and its wall thickness is 10 mm. The inner wall of the basalt fiber rod body 1 does not have the guide groove 12 described in Example 1, and its outer wall does not have the reinforcing protrusion 11 described in Example 1. The interior of the basalt fiber rod body 1 has an elastic filler 53, which is formed by polyurethane injection molding.

[0053] Anchor head 2 is a cone shape, with its bottom diameter larger than the outer diameter of the basalt fiber rod 1. Anchor head 2 is coaxially arranged with the basalt fiber rod 1, with its pointed end away from the front end of the basalt fiber rod 1. The large-diameter end of anchor head 2 is fixedly connected to the front end of the basalt fiber rod 1. The basalt fiber rod 1 and anchor head 2 are an integral structure made of continuous basalt fiber and epoxy resin through a casting molding process.

[0054] The end connection mechanism 3 is located at the rear end of the basalt fiber rod 1 and is detachably and fixedly connected to it. The end connection mechanism 3 includes a connecting sleeve 31, a thrust washer 32, and a nut 33, which are the same as the end connection mechanism 3 described in Embodiment 1. The connection method between the connecting sleeve 31 and the basalt fiber rod 1 is also the same as in Embodiment 1.

[0055] The parts not mentioned in this utility model can be achieved by adopting or referencing existing technologies.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 utility model.

[0058] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A fiber-reinforced anchor bolt, characterized in that, It includes a basalt fiber rod, an anchor head, an axial reinforcement unit, a circumferential restraint assembly, and an end connection mechanism. The basalt fiber rod is a hollow straight rod with open ends and spirally distributed reinforcing ridges on its outer circumference. The anchor head is located at the front end of the basalt fiber rod and closes the front end of the basalt fiber rod. The axial reinforcement unit is set inside the basalt fiber rod body, which includes a central carbon fiber rod and multiple basalt fiber bundles. The central carbon fiber rod is arranged coaxially with the basalt fiber rod body. Multiple basalt fiber bundles are evenly arranged on the outside of the central carbon fiber rod. The front end of the basalt fiber bundle is connected to the anchor head, and the rear end is connected to the basalt fiber rod body through the anchoring component. The circumferential constraint assembly includes an elastic filler and multiple radial constraint rings. All radial constraint rings are sleeved on the outside of the central carbon fiber rod and all basalt fiber bundles and are arranged at intervals along the axial direction of the central carbon fiber rod. The elastic filler is filled between the inner wall of the central carbon fiber rod and the basalt fiber rod. The end connection mechanism is located at the rear end of the basalt fiber rod and is detachably and fixedly connected to it.

2. The fiber-reinforced anchor bolt according to claim 1, characterized in that, The basalt fiber rod, reinforcing ridge, and anchor head are made of continuous basalt fiber and epoxy resin through a casting molding process, and the cross-section of the reinforcing ridge is an isosceles trapezoid. The anchor head is a cone and is coaxially arranged with the basalt fiber rod. The bottom diameter of the anchor head is larger than the outer diameter of the basalt fiber rod. The large-diameter end of the anchor head is fixedly connected to the front end of the basalt fiber rod, and the anchor head, reinforcing ridge and basalt fiber rod are integrally formed.

3. The fiber-reinforced anchor bolt according to claim 1, characterized in that, The central carbon fiber rod is a cylinder with a uniform cross-section. Its outer circumference has receiving grooves that are equal in number and correspond one-to-one in position to the basalt fiber bundles. All receiving grooves are evenly distributed on the circumference with the axis of the central carbon fiber rod as the center. Each of the basalt fiber bundles is embedded in its corresponding receiving groove and arranged in parallel.

4. A fiber-reinforced anchor bolt according to claim 3, characterized in that, The central carbon fiber rod has radial perforations at both ends. Each radial perforation contains a fixing pin, and both ends of the fixing pin are inserted into the interior of the basalt fiber rod and fixedly connected to the basalt fiber rod.

5. A fiber-reinforced anchor bolt according to claim 1, characterized in that, The inner circumference of the basalt fiber rod is provided with multiple sets of guide grooves of different lengths. Each set of guide grooves includes two guide grooves symmetrically arranged about the axis of the basalt fiber rod. The guide grooves are evenly distributed at equal intervals along the circumference of the basalt fiber rod.

6. A fiber-reinforced anchor bolt according to claim 5, characterized in that, The cross-section of the guide groove is square, and the number of guide groove sets is equal to the number of radial constraint rings and they correspond one-to-one. The radial constraint ring is disc-shaped, with two guide sliders symmetrically arranged on its outer edge. The two guide sliders are located in two opposite guide grooves. Each radial constraint ring is positioned on the inner side of the basalt fiber rod by the two guide sliders on its side.

7. A fiber-reinforced anchor bolt according to claim 3, characterized in that, The radial constraint ring has a central circular hole on its inner side that matches the central carbon fiber rod. The inner edge of the radial constraint ring adjacent to the central circular hole has a semi-circular arc groove that is equal in number and corresponding in position to the receiving groove. The semi-circular arc groove on the inner side of each radial constraint ring constrains the basalt fiber bundle into the corresponding receiving groove of the central carbon fiber rod.

8. A fiber-reinforced anchor bolt according to claim 1, characterized in that, The anchoring assembly includes an anchor plate and multiple pairs of clips. The anchor plate is located behind the central carbon fiber rod and is engaged at the shoulder of a hole inside the basalt fiber rod. The number of clamps is equal to the number of basalt fiber bundles and their positions correspond one-to-one. The rear end of each basalt fiber bundle is fixedly connected to the anchor plate through a corresponding pair of clamps.

9. A fiber-reinforced anchor bolt according to claim 1, characterized in that, The end connection mechanism includes a connecting sleeve, a thrust washer, and a nut. The thrust washer has a circular hole in the center, and the connecting sleeve is movably inserted into the circular hole. The front end of the connecting sleeve is fitted onto the rear end of the basalt fiber rod and is threaded into it. The nut is located on the rear side of the thrust washer and is threaded into the outer circumferential wall of the connecting sleeve.

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