Basalt fiber reinforced composite rib anchor cable

Abstract

The utility model provides a basalt fiber reinforced composite rib anchor cable, which belongs to the technical field of foundation pit engineering, and comprises a grouting pipe, a steel strand, an anchorage device for applying prestress, a basalt fiber reinforced composite rib material, a PVC (polyvinyl chloride) pipe and a connector which is combined with the anchorage device and is used for connecting the basalt fiber reinforced composite rib material and the steel strand, the connector comprises a grouting pipe hole formed in the axis of the connector, and a centering support arranged along the axis of the connector and used for centering distribution of the grouting pipe and the basalt fiber reinforced composite rib materials. An on-site bonding mode can also be adopted, and the construction mode is flexible; meanwhile, the basalt fiber reinforced composite rib material is connected through the steel strand, the steel strand can be conveniently fixed to a traditional mechanical clamping piece anchorage device, prestress can be conveniently applied, and therefore the advantage that the basalt fiber reinforced composite rib material is low in shear strength is utilized, and the limitation of a building red line is broken through.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit engineering, in particular to a basalt fiber reinforced composite tendon anchor cable. Background Art

[0002] Basalt fiber reinforced composite bar is a new type of non-metallic composite material, which is made of basalt fiber as reinforcing material, synthetic resin as matrix material, and an appropriate amount of auxiliary agent, through pultrusion process and special surface treatment method. Basalt fiber reinforced composite bar has excellent physical and chemical properties such as high strength, light weight, alkali resistance and resistance to natural element corrosion, and its shear strength is about one-third to one-half of that of metal bars. At present, basalt fiber composite bars are mainly used in structural reinforcement projects and concrete pavement projects, and have achieved good application results. If basalt fiber composite bars are used as anchoring materials, it can well solve the corrosion problem of metal bars in geotechnical engineering and provide better protection for the safety and durability of the structure.

[0003] Basalt fiber composite reinforcement is a linear elastic brittle material with high tensile strength and low elastic modulus. Due to the low shear strength of basalt fiber composite reinforcement, it cannot be effectively connected with traditional mechanical clip anchors. The special anchors are generally expensive at present. At the same time, the matrix materials of basalt fiber composite reinforcements from various manufacturers, such as epoxy resin materials, are different, resulting in unsatisfactory application of mechanical anchors. Utility Model Content

[0004] The utility model provides an anchor cable which can utilize the low shear strength of basalt fiber reinforced composite reinforcement materials and can be combined with existing mechanical anchors to break through the restrictions of building red lines.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A basalt fiber reinforced composite bar anchor cable comprises a grouting pipe, a steel strand and an anchor for applying prestress, and also comprises a basalt fiber reinforced composite bar material, a PVC pipe and a connector combined with the anchor to connect the basalt fiber reinforced composite bar material and the steel strand, wherein the connector comprises a grouting pipe hole arranged at its axis, a centering bracket arranged along its axis for centering the grouting pipe and the basalt fiber reinforced composite bar material, a plurality of sleeve assemblies symmetrically arranged along its axis for fixing the basalt fiber reinforced composite bar material and an anchor cup hole for fixing the steel strand.

[0007] Preferably, the connector is an integrally formed disc-shaped structure.

[0008] Preferably, the connector is a disc-shaped structure assembled by a plurality of fan-shaped blocks.

[0009] Preferably, the centering bracket includes a front frame body that cooperates with the grouting pipe hole for fixing the grouting pipe and a rear frame body that is spaced apart from the connector and is used to fix the basalt fiber reinforced composite reinforcement.

[0010] Preferably, the front frame includes a supporting portion that fits against the inner wall of the grouting pipe hole and a fixing portion that is arranged on the inner side of the supporting portion and is used to limit the grouting pipe.

[0011] Preferably, the rear frame includes a frame body, a plurality of extensions extending outward from the center of the frame body, and a center hole arranged at the center of the frame body for the grouting pipe to pass through, and a fitting groove concave toward the center of the frame body is provided at the connection between the extension and the frame body.

[0012] Preferably, the sleeve assembly includes a first sleeve threadedly connected to the connector and a second sleeve arranged at an end of the first sleeve away from the connector, the outer wall of one end of the first sleeve is provided with an external thread, the inner wall of the other end is provided with an internal thread, and the inner side of the first sleeve is provided with a connecting thread for connecting to basalt fiber reinforced composite reinforcement; the outer wall of one end of the second sleeve is provided with an external thread matching the internal thread of the first sleeve, and the inner side of the other end is provided with a tapered portion gradually shrinking toward the axis of the second sleeve.

[0013] Preferably, the connecting thread of the first sleeve and the tapered portion of the second sleeve are provided with circumferentially distributed positioning bolts.

[0014] Preferably, the anchor comprises a steel backing plate and a positioning hole provided on the steel backing plate for the steel strand to pass through, and the positioning hole and the anchor cup hole are both provided with an anchor cup for fixing the steel strand.

[0015] Preferably, a clip for fixing the steel strand is provided on the inner side of the anchor cup, and the clip comprises a plurality of pieces that can be enclosed to form a cylindrical structure and a rubber ring arranged on the periphery of the plurality of pieces.

[0016] It can be seen from the above technical solutions that the utility model has the following beneficial effects:

[0017] 1. In the utility model, the basalt fiber reinforced composite reinforcement is fixedly connected to the connector through a sleeve assembly, and the end of the basalt fiber reinforced composite reinforcement away from the connection is placed on the centering bracket, the grouting pipe passes through the centering bracket and the connector and extends into the PVC pipe, one end of the steel strand passes through the anchor cup hole on the connector, and the other end passes through the PVC pipe and the concrete waist beam, and is fixed to the concrete waist beam through an anchor. The utility model utilizes a sleeve assembly in combination with a bonding medium to connect the basalt fiber reinforced composite reinforcement, which can be prefabricated in the factory or bonded on site, and the construction method is flexible; at the same time, the basalt fiber reinforced composite reinforcement is transferred by the steel strand, which can be conveniently fixed with a traditional mechanical clip anchor to apply prestress, thereby utilizing the low shear strength of the basalt fiber reinforced composite reinforcement and breaking through the limitation of the building red line.

[0018] 2. In the utility model, the grouting pipe is connected to the connector through a centering bracket, and the centering distribution with the basalt fiber reinforced composite reinforcement is realized through the centering bracket. At the same time, the distribution range of the two ends of the grouting pipe is arranged within the full length of the anchor cable, which can effectively play the role of the grouting pipe in the anchoring project and improve the use effect of the anchor cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the anchor cable provided by the utility model;

[0020] Figure 2 for Figure 1 Exploded view of the concrete waist beam removed;

[0021] Figure 3 A schematic diagram of the structure of the integrated connector provided by the utility model;

[0022] Figure 4 It is a structural schematic diagram of the steel pad;

[0023] Figure 5 is a structural schematic diagram of the first casing;

[0024] Figure 6 is a schematic diagram of the structure of the second casing;

[0025] Figure 7 It is a structural schematic diagram of the front frame;

[0026] Figure 8 It is a structural schematic diagram of the rear frame;

[0027] Fig. 9 This is a structural schematic diagram of the separable connector provided by the utility model.

[0028] In the figure: 10, grouting pipe; 20, steel strand; 30, anchor; 310, steel pad; 320, positioning hole; 40, basalt fiber reinforced composite reinforcement; 50, PVC pipe; 60, connector; 61, connecting piece; 62, connecting seat; 610, grouting pipe hole; 621, front frame; 6211, support part; 6212, fixing part; 622, rear frame; 6221, frame body; 6222, extension part; 6223, center hole; 6224, fitting groove; 631, first sleeve; 632, second sleeve; 633, connecting thread; 634, positioning bolt; 640, anchor cup hole; 70, anchor cup; 710, clip; 711, piece; 712, rubber ring; 80, concrete waist beam. DETAILED DESCRIPTION

[0029] A preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

[0030] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0031] Embodiment 1:

[0032] Reference Figure 1 , Figure 3A basalt fiber reinforced composite tendon anchor cable comprises a grouting pipe 10, a steel strand 20 and an anchor 30 for applying prestress. Further, the anchor cable also comprises a basalt fiber reinforced composite tendon 40, a PVC pipe 50 and a connector 60. The connector 60 is combined with the anchor when in use to connect the basalt fiber reinforced composite tendon and the steel strand together. Specifically, the connector comprises a grouting pipe hole 610, a centering bracket, a sleeve assembly and an anchor cup hole 640. The grouting pipe hole 610 is arranged at the axis of the connector and penetrates the connector. The centering bracket is distributed along the axis direction of the connector, and the centering bracket fixes the grouting pipe and the basalt fiber reinforced composite tendon and makes the grouting pipe and the basalt fiber reinforced composite tendon distributed in the center. The number of sleeve assemblies is multiple, and the multiple sleeve assemblies are symmetrically arranged along the axis of the connector. The sleeve assembly is used to fix the basalt fiber reinforced composite tendon. The number of anchor cup holes is also There are multiple anchor holes, and the multiple anchor holes are also symmetrically arranged along the axis of the connector. The anchor hole 640 is used to fix the steel strand. When in use, the basalt fiber reinforced composite reinforcement is fixedly connected to the connector through the sleeve assembly, and the end of the basalt fiber reinforced composite reinforcement away from the connection is placed on the centering bracket, the grouting pipe passes through the centering bracket and the connector and extends into the PVC pipe, one end of the steel strand passes through the anchor hole on the connector, and the other end passes through the PVC pipe and the concrete waist beam 80, and is fixed to the concrete waist beam through an anchor. The utility model utilizes a sleeve assembly in combination with a bonding medium to connect the basalt fiber reinforced composite reinforcement. The factory prefabrication connection can also be adopted by on-site bonding, and the construction method is flexible. At the same time, the basalt fiber reinforced composite reinforcement is transferred by the steel strand, which can be conveniently fixed with a traditional mechanical clip anchor to apply prestress, thereby achieving the low shear strength of the basalt fiber reinforced composite reinforcement and breaking through the limitation of the building red line.

[0033] As a preferred technical solution of this embodiment, the connector 60 is an integrally formed disc-shaped structure, that is, the connector in this embodiment is a whole, so that the connector can be used without assembly.

[0034] Reference Figure 2As a preferred technical solution of this embodiment, the centering bracket includes a front frame body 621 and a rear frame body 622. The front frame body 621 is used in conjunction with the grouting pipe hole 610, and the front frame body is used to fix the grouting pipe on the connector. The rear frame body 622 is spaced relative to the connector 60, and the rear frame body is used to fix the basalt fiber reinforced composite reinforcement. When in use, the front frame body and the rear frame body are distributed along the axial direction of the connector. The grouting pipe is fixed to the connector through the front frame body, and one end of the grouting pipe extends into the PVC pipe, and the other end passes through the rear frame body. The end of the basalt fiber reinforced composite reinforcement away from the sleeve assembly is placed on the rear frame body. In this way, the grouting pipe and the basalt fiber reinforced composite reinforcement can be connected into a whole by utilizing the cooperation of the front frame body and the rear frame body.

[0035] Reference Figure 7 Further, the front frame body 621 includes a support portion 6211 and a fixing portion 6212. The support portion 6211 is specifically elliptical and is arranged in close contact with the inner wall of the grouting pipe hole 610. The fixing portion 6212 is specifically circular and has a plurality of fixing portions, which are arranged on the inner side of the support portion to limit and fix the grouting pipe 10 on the connector. It should be noted that the number of fixing portions can be selected and set according to the number of grouting pipes, and no excessive restrictions are made here.

[0036] Reference Figure 8 Furthermore, the rear frame body 622 includes a frame body 6221, an extension part 6222 and a center hole 6223. There are multiple extension parts, and the multiple extension parts extend outward from the center of the frame body. The center hole 6223 is set at the center of the frame body to facilitate the passage of the grouting pipe. In order to facilitate the fixation of the end of the basalt fiber reinforced composite reinforcement away from the sleeve assembly, an engaging groove 6224 concave toward the center of the frame body is provided at the connection between the extension part and the frame body. When in use, the basalt fiber reinforced composite reinforcement is embedded in the aforementioned engaging groove for fixation.

[0037] Reference Figure 5 , Figure 6 As a preferred technical solution of this embodiment, the sleeve assembly includes a first sleeve 631 and a second sleeve 632. The first sleeve 631 is threadedly connected to the connector 60, and the second sleeve 632 is arranged at an end of the first sleeve away from the connector. Further, an outer wall of one end of the first sleeve is provided with an outer thread, and an inner wall of the other end is provided with an inner thread. At the same time, a connecting thread 633 for connecting the basalt fiber reinforced composite reinforcement 40 is provided on the inner side of the first sleeve;

[0038] Correspondingly, an external thread matching the internal thread of the first sleeve is provided on the outer wall of one end of the second sleeve, and a tapered portion gradually shrinking toward the axis of the second sleeve is provided on the inner side of the other end. When in use, an internal threaded hole matching the external thread on the first sleeve is opened on the connector, so that the first sleeve thread can be fixed on the connector, and the second sleeve is fixedly connected with the internal thread on the first sleeve through the external thread thereon, thereby realizing the connection and fixation of the connector, the first sleeve and the second sleeve. At the same time, the connecting thread on the inner side of the first sleeve and the tapered through hole formed by the tapered portion of the second sleeve can be combined with the bonding material to effectively connect the basalt fiber reinforced composite reinforcement and increase the connection safety factor.

[0039] Furthermore, the connecting thread of the first sleeve 631 and the tapered portion of the second sleeve 632 are provided with circumferentially distributed positioning bolts 634. In this embodiment, the number of the positioning bolts is four. Accordingly, in order to achieve effective connection of the positioning threads, threaded holes are opened at the connecting thread of the first sleeve, and threaded holes are opened at the tapered portion of the second sleeve. When in use, the positioning bolts are inserted until they come into contact with the basalt fiber reinforced composite reinforcement, thereby centering the basalt fiber reinforced composite reinforcement.

[0040] Reference Figure 4 As a preferred technical solution of this embodiment, the anchor 30 includes a steel pad 310 and a positioning hole 320 opened on the steel pad for the steel strand to pass through. The steel pad is fixed to the side wall of the concrete waist beam. At the same time, in order to effectively fix the steel strand, an anchor cup 70 for fixing the steel strand is provided on the inner side of the positioning hole 320 and the anchor cup hole 640. Furthermore, a clip 710 for fixing the steel strand is provided on the inner side of the anchor cup 70. Specifically, the clip includes a plurality of pieces 711 that can be surrounded to form a cylindrical structure and a rubber ring 712 arranged on the periphery of the plurality of pieces. When in use, the anchor cup is embedded in the aforementioned positioning hole and anchor cup hole, the steel strand passes through the anchor cup and is fixed to the anchor cup through the clip arranged on the periphery.

[0041] Embodiment 2:

[0042] Reference Fig. 9 , which is basically the same as the first embodiment, except that the connector 60 in this embodiment is not an integral structure, but a disc-shaped structure assembled by a plurality of fan-shaped blocks. In order to facilitate the assembly of the plurality of fan-shaped blocks, a connecting piece 61 for connection and a connecting seat 62 cooperating with the connecting piece are provided on the assembly side of the fan-shaped block. It should be noted that the two assembly sides of the same fan-shaped block are respectively provided with the aforementioned connecting piece and connecting seat, and the connecting piece of a certain fan-shaped block is connected with the connecting seat of the adjacent fan-shaped block to form an integral disc-shaped structure in sequence. In this way, the connector can be conveniently assembled and used.

[0043] The above-described embodiments are merely descriptions of preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A basalt fiber reinforced composite tendon anchor cable, comprising a grouting pipe (10), a steel strand (20) and an anchor (30) for applying prestress, characterized in that: It also includes basalt fiber reinforced composite reinforcement (40), a PVC pipe (50), and a connector (60) combined with an anchor to connect the basalt fiber reinforced composite reinforcement and the steel strand, the connector including a grouting pipe hole (610) arranged at its axis, a centering bracket arranged along its axis for centering the grouting pipe and the basalt fiber reinforced composite reinforcement, a plurality of sleeve assemblies symmetrically arranged along its axis for fixing the basalt fiber reinforced composite reinforcement, and an anchor cup hole (640) for fixing the steel strand.

2. The basalt fiber reinforced composite anchor cable according to claim 1, characterized in that: The connector (60) is an integrally formed disc-shaped structure.

3. The basalt fiber reinforced composite anchor cable according to claim 1, characterized in that: The connector (60) is a disc-shaped structure assembled by a plurality of sector-shaped blocks.

4. The basalt fiber reinforced composite anchor cable according to claim 1, characterized in that: The centering bracket comprises a front frame body (621) matched with the grouting pipe hole (610) for fixing the grouting pipe, and a rear frame body (622) spaced apart from the connector (60) for fixing the basalt fiber reinforced composite reinforcement.

5. The basalt fiber reinforced composite anchor cable according to claim 4, characterized in that: The front frame (621) comprises a support portion (6211) that fits the inner wall of the grouting pipe hole (610) and a fixing portion (6212) that is arranged on the inner side of the support portion and is used to limit the position of the grouting pipe (10).

6. The basalt fiber reinforced composite anchor cable according to claim 4, characterized in that: The rear frame (622) includes a frame body (6221), a plurality of extensions (6222) extending outward from the center of the frame body, and a center hole (6223) arranged at the center of the frame body for the grouting pipe to pass through, and a fitting groove (6224) concave toward the center of the frame body is provided at the connection between the extension and the frame body.

7. The basalt fiber reinforced composite anchor cable according to claim 1, characterized in that: The sleeve assembly comprises a first sleeve (631) threadedly connected to the connector (60) and a second sleeve (632) arranged at an end of the first sleeve away from the connector, the outer wall of one end of the first sleeve is provided with an external thread, and the inner wall of the other end is provided with an internal thread, and the inner side of the first sleeve is provided with a connecting thread (633) for connecting to a basalt fiber reinforced composite reinforcement (40); the outer wall of one end of the second sleeve is provided with an external thread matching the internal thread of the first sleeve, and the inner side of the other end is provided with a tapered portion that gradually shrinks toward the axis of the second sleeve.

8. The basalt fiber reinforced composite anchor cable according to claim 7, characterized in that: The connecting thread of the first sleeve (631) and the conical portion of the second sleeve (632) are provided with circumferentially distributed positioning bolts (634).

9. The basalt fiber reinforced composite anchor cable according to claim 1, characterized in that: The anchor (30) comprises a steel backing plate (310) and a positioning hole (320) provided on the steel backing plate for the steel strand to pass through, and an anchor cup (70) for fixing the steel strand is provided in both the positioning hole (320) and the anchor cup hole (640).

10. The basalt fiber reinforced composite anchor cable according to claim 9, characterized in that: A clip (710) for fixing the steel strand is provided inside the anchor cup (70), and the clip comprises a plurality of pieces (711) that can be enclosed to form a cylindrical structure and a rubber ring (712) arranged outside the plurality of pieces.

Images