Rotary jet grouting anchor cable

Abstract

The utility model provides a jet grouting anchor cable, which belongs to the technical field of support engineering, and comprises an anchor head plate, a steel strand and a hoop ring, the anchor head plate is provided with a drill bit hole and a wire inlet hole, and the periphery of the wire inlet hole is uniformly provided with a plurality of wire return holes; one end of the steel strand penetrates through the wire inlet hole, and the part, penetrating through the wire inlet hole, of the steel wire penetrates back into the wire return hole; and the steel wire penetrating through the wire return hole is hooped on the steel strand by the hoop ring. According to the utility model, the connection firmness of the steel strand and the anchor head plate is improved, and the possibility of loosening and falling of the steel strand is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of support engineering, and more specifically relates to a rotary grouting anchor cable. Background Art

[0002] High-pressure rotary jet anchor is a type of prestressed anchor developed for foundation pit support in soft soil strata. During construction, hole drilling, grouting, mixing and reinforcement insertion are completed at one time. It has the advantages of large anchor body diameter, high pull-out resistance provided by a single anchor cable and fast construction speed.

[0003] The jet-sprayed anchor cable is usually composed of an anchor plate mounted on a drill pipe and a steel strand connected to the anchor plate. Currently, the steel strand is usually inserted into a preset hole on the anchor plate and fixed by bolts or welding. However, these connection methods are not reliable and may cause the steel strand to fall off the anchor plate during drilling. Since the anchor plate and the steel strand are subject to large traction and vibration during the construction of the jet-sprayed anchor cable, bolt connection is prone to loosening. When welding is used, the steel strand is difficult to weld and the welding quality is difficult to control, which can easily lead to unreliable welding. In addition, the strength of the steel strand will decrease after being heated. Utility Model Content

[0004] The utility model aims to provide a rotary jet anchor cable to solve the technical problem in the prior art that the steel strands and the anchor head plate in the rotary jet anchor cable are connected and fixed by bolting or welding, resulting in an unreliable connection, which may cause the steel strands to fall off the anchor head plate during drilling.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a rotary spray anchor cable, including an anchor head plate, a steel strand and a hoop, the anchor head plate is provided with a drill hole and a wire entry hole, and the outer periphery of the wire entry hole is provided with a plurality of return holes; one end of the steel strand passes through the wire entry hole, and the part of the steel wire passing through the wire entry hole is returned to the return hole; the hoop clamps the steel wire passing through the return hole on the steel strand.

[0006] In combination with the above technical solution, in a possible implementation, a plurality of wire entry holes are provided on the anchor head plate, and there are a plurality of steel strands and hoops, which are arranged in one-to-one correspondence with the wire entry holes.

[0007] In combination with the above technical solution, in a possible implementation manner, the drill hole is arranged in the middle of the anchor head plate, and a plurality of wire entry holes are distributed around the drill hole.

[0008] In combination with the above technical solution, in a possible implementation method, 2-6 wire entry holes are provided on the anchor head plate, and the wire entry holes are evenly distributed around the drill hole; 5-9 wire return holes are provided on the periphery of each wire entry hole, and the wire return holes are evenly distributed around the wire entry hole.

[0009] In combination with the above technical solution, in a possible implementation manner, the hoop is a tubular structure with a C-shaped cross-section.

[0010] In combination with the above technical solution, in a possible implementation, the opening of the hoop is a bevel opening.

[0011] In combination with the above technical solution, in a possible implementation manner, both the inlet hole and the return hole are tapered holes, and the hole openings on the entry side are larger than the hole openings on the exit side.

[0012] In combination with the above technical solution, in a possible implementation, a rotating ring is provided on the anchor head plate, and the rotating ring is rotatably arranged in the drill hole.

[0013] In combination with the above technical solution, in a possible implementation, the cross section of the rotating ring is a concave-shaped structure.

[0014] In combination with the above technical solution, in a possible implementation manner, a receiving groove is provided on the inner side of the rotating ring.

[0015] The beneficial effect of the rotary grouting anchor cable provided by the utility model is that, compared with the prior art, the utility model provides a return line hole on the anchor head plate, disassembles the steel strand passing through the wire entry hole into steel wires and then passes them back into the return line hole, and then uses a hoop to clamp the steel wire around the steel strand, so that a relatively firm connection is formed between the anchor head plate and the steel strand; because the steel wire itself that makes the steel strand has elasticity, after the steel wire is passed back into the return line hole, the steel strand and the steel wire will be stuck in the wire entry hole and the return line hole under the action of the elasticity of the steel wire, It is difficult to retreat, and then the steel strand and the steel wire are tightened by a hoop, which can prevent the steel wire from retreating, thereby firmly connecting the steel strand and the anchor head plate to avoid loosening; and because this connection form forms a movable connection between the steel strand and the anchor head plate, the connection will not loosen or break due to vibration, and the steel strand will not be heated during the connection process, which will not cause the strength of the steel strand to change; ultimately, it is beneficial to improve the connection firmness between the steel strand and the anchor head plate, and reduce the possibility of the steel strand loosening and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the main structure of a rotary grouting anchor cable provided in one embodiment of the utility model;

[0018] Figure 2A schematic diagram of the main structure of an anchor head plate of a rotary grouting anchor cable provided in another embodiment of the utility model;

[0019] Figure 3 for Figure 2 A schematic cross-sectional view of the jet-sprayed anchor cable at position AA provided in the embodiment;

[0020] Figure 4 A schematic diagram of the lateral structure of a hoop of a rotary grouting anchor provided in another embodiment of the utility model;

[0021] Figure 5 for Figure 2 A schematic diagram of the cross-sectional structure of the jet-jet anchor cable at position BB provided in the embodiment.

[0022] Among them, the reference numerals in the figures are as follows:

[0023] 10. Anchor plate; 11. Drill hole; 12. Wire inlet hole; 13. Wire return hole;

[0024] 20. Steel strand; 21. Steel wire;

[0025] 30. Hoop; 31. Bevel opening;

[0026] 40. Rotating ring; 41. Accommodating groove. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, not all of the embodiments, and the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0029] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In the description of the present utility model, "plurality" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0030] The rotary grouting anchor cable provided by the utility model is now described.

[0031] like Figures 1 to 3 As shown, the first embodiment of the utility model provides a rotary jet anchor cable, including an anchor head plate 10, a steel strand 20 and a hoop 30, the anchor head plate 10 is provided with a drill hole 11 and a wire entry hole 12, and the outer periphery of the wire entry hole 12 is provided with a plurality of return holes 13; one end of the steel strand 20 passes through the wire entry hole 12, and the portion of the steel wire 21 passing through the wire entry hole 12 is returned to the return hole 13; the hoop 30 hoop the steel wire 21 passing through the return hole 13 onto the steel strand 20.

[0032] During installation, first pass one end of the steel strand 20 through the wire entry hole 12, and after disassembling the part passing through the wire entry hole 12, spread out the steel wire 21 therein, bend it back and pass it through the return hole 13, and then gather or weave the part that has passed through the steel strand 20 that has not passed through the wire entry hole 12, and then fix it on the steel strand 20 through the hoop 30.

[0033] Compared with the prior art, the rotary grouting anchor provided in the present embodiment has a return hole 13 provided on the anchor head plate 10, and the steel strand 20 passing through the wire entry hole 12 is disassembled into steel wires 21 and then passed back into the return hole 13, and then the steel wires 21 are clamped around the steel strand 20 by the hoop 30, so that a relatively firm connection is formed between the anchor head plate 10 and the steel strand 20; since the steel wire 21 made of the steel strand itself has elasticity, after the steel wire 21 is passed back into the return hole 13, under the action of the elasticity of the steel wire 21, the steel strand 20 and the steel wire 21 will be stuck in the wire entry hole 12 and the return hole 13, It is difficult to retreat, and then the steel strand 20 and the steel wire 21 are tightened by the hoop 30, which can prevent the steel wire 21 from retreating, thereby firmly connecting the steel strand 20 and the anchor head plate 10 to avoid loosening; and because of this connection form, the steel strand 20 and the anchor head plate 10 form a movable connection, the connection will not loosen or break due to vibration, and the steel strand 20 will not be heated during the connection process, which will not cause the strength of the steel strand 20 to change; ultimately, it is beneficial to improve the connection firmness between the steel strand 20 and the anchor head plate 10, and reduce the possibility of the steel strand 20 loosening and falling off.

[0034] like Figures 2 to 5As shown, the utility model provides a specific implementation method based on the first implementation method as follows:

[0035] In some embodiments, the anchor plate 10 is provided with a plurality of wire entry holes 12, and the steel strands 20 and the hoop 30 are both multiple and arranged one-to-one corresponding to the wire entry holes 12. The drill hole 11 is arranged in the middle of the anchor plate 10, and the plurality of wire entry holes 12 are distributed around the drill hole 11, so that the anchor plate 10 is subjected to balanced force during drilling, thereby reducing the possibility of the anchor plate 10 falling off the drill rod.

[0036] In some specific embodiments, Figure 2 As shown, the anchor head plate 10 is provided with 2-6 wire inlet holes 12, and the wire inlet holes 12 are evenly distributed around the drill hole 11; the outer periphery of each wire inlet hole 12 is provided with 5-9 wire return holes 13, and the wire return holes 13 are evenly distributed around the wire inlet hole 12.

[0037] In some embodiments, the hoop 30 is a tubular structure with a C-shaped cross section, that is, a tubular structure with an opening, so that when installing, the hoop 30 is put on the steel wire 21 and the steel strand 20, and then the hoop 30 is pressed tightly with a hammer, pliers, or other tools. In order to further improve the degree of tightening and avoid opening, a limiting groove is provided on the outside of the hoop 30, and a wire can be wound into the limiting groove on the outside of the hoop 30, or the opening of the hoop 30 can be directly welded.

[0038] Preferably, if Figure 4 As shown, the opening of the hoop 30 is a bevel opening 31, so that when compressed, the steel wire 21 and the steel strand 20 can be clamped more tightly by the offset of the bevel opening.

[0039] Furthermore, to facilitate installation, both the inlet hole 12 and the return hole 13 are tapered holes, and the hole openings on the entry side are larger than the hole openings on the exit side, so as to facilitate the insertion of the steel strands 20 and the steel wires 21.

[0040] In some embodiments, Figure 2 and Figure 5 As shown, the anchor head plate 10 is provided with a rotating ring 40, which is rotatably arranged in the drill hole 11, so that the rotating ring 40 is sleeved on the drill rod to reduce the possibility of rotation of the anchor head plate 10. Specifically, the cross section of the rotating ring 40 is a concave structure, so as to be limited in the drill hole 11 to avoid falling off.

[0041] Furthermore, if Figure 5 As shown, a receiving groove 41 is provided inside the rotating ring 40 to accommodate grease and reduce friction between the rotating ring 40 and the anchor head plate 10 .

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary grouting anchor cable, characterized in that: include: The anchor head plate (10) is provided with a drill hole (11) and a wire entry hole (12), and the outer periphery of the wire entry hole (12) is provided with a plurality of return wire holes (13); One end of the steel strand (20) passes through the wire entry hole (12), and the portion of the steel wire (21) that passes through the wire entry hole (12) passes back into the wire return hole (13); The hoop (30) hoops the steel wire (21) passing through the loop hole (13) onto the steel strand (20).

2. The rotary grouting anchor cable according to claim 1, characterized in that: The anchor head plate (10) is provided with a plurality of wire entry holes (12), and the steel strands (20) and the hoop rings (30) are both in plurality and are arranged in one-to-one correspondence with the wire entry holes (12).

3. The rotary grouting anchor cable according to claim 2, characterized in that: The drill hole (11) is arranged in the middle of the anchor head plate (10), and a plurality of wire entry holes (12) are distributed around the drill hole (11).

4. The rotary grouting anchor cable according to claim 3, characterized in that: The anchor head plate (10) is provided with 2-6 wire inlet holes (12), and the wire inlet holes (12) are evenly distributed around the drill hole (11); the outer periphery of each wire inlet hole (12) is provided with 5-9 wire return holes (13), and the wire return holes (13) are evenly distributed around the wire inlet hole (12).

5. The rotary grouting anchor cable according to claim 1, characterized in that: The hoop (30) is a tubular structure with a C-shaped cross section.

6. The rotary grouting anchor cable according to claim 5, characterized in that: The opening of the hoop (30) is a sloped opening (31).

7. The rotary grouting anchor cable according to claim 1, characterized in that: The inlet hole (12) and the return hole (13) are both tapered holes, and the hole openings on the inlet side are larger than the hole openings on the outlet side.

8. The rotary grouting anchor cable according to claim 1, characterized in that: The anchor head plate (10) is provided with a rotating ring (40), and the rotating ring (40) is rotatably arranged in the drill hole (11).

9. The rotary grouting anchor cable according to claim 8, characterized in that: The cross section of the rotating ring (40) is a concave-shaped structure.

10. The rotary grouting anchor cable according to claim 9, characterized in that: The inner side of the rotating ring (40) is provided with a receiving groove (41).

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