Negative Poisson's ratio anchor rod rock-soil supporting device

Abstract

The utility model discloses a negative Poisson's ratio anchor rod rock-soil supporting device, and relates to the technical field of rock-soil supporting. The anchor rod comprises a first anchor rod body, a second anchor rod body is installed on the outer side of the first anchor rod body, round plugs are fixedly arranged at the ends of the first anchor rod body and the second anchor rod body, an anchor head is installed at the end, away from the second anchor rod body, of the first anchor rod body, and the two ends of the first anchor rod body and the two ends of the second anchor rod body are provided with round plugs and round inserting openings respectively. The round plug of the second anchor rod is inserted into the round socket of the first anchor rod; positioning holes which are symmetrically distributed are formed in the outer side of one end, close to the first anchor rod, of the second anchor rod; the first anchor rod, the second anchor rod, the circular insertion opening, the circular insertion head and other structures are arranged to be used in cooperation, the length of the anchor rod can be increased according to the requirement, the trouble caused by cutting the anchor rod according to the requirement is avoided, and the problem that waste is caused by the short anchor rod after cutting is avoided; therefore, the purpose of conveniently adjusting the length of the anchor rod for use is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical support, in particular to a geotechnical support device for a negative Poisson's ratio anchor rod. Background Technique

[0002] An anchor rod is a device used for supporting and fixing structures, and is widely used in civil engineering and underground engineering. It is usually made of high-strength materials and buried in soil or rock. It provides additional support through anchoring force and friction to prevent the collapse and deformation of tunnels, slopes or foundations, and enhances the stability and safety of structures; the negative Poisson's ratio refers to the characteristic that when a material is stressed, the longitudinal deformation and the transverse deformation are in opposite directions, that is, when the material is stretched, it not only extends along the direction of the applied force, but also expands transversely, resulting in a Poisson's ratio less than zero. This characteristic enables the negative Poisson's ratio material to absorb and disperse energy more effectively, and improves the toughness and stability of the structure.

[0003] However, the lengths of existing anchor rods are fixed. Usually, longer anchor rods are cut into shorter ones according to requirements for actual use. Such operation is rather cumbersome and prone to waste of the shorter anchor rods after cutting, thus increasing the use cost. In view of the above problems, the inventor proposes a geotechnical support device for a negative Poisson's ratio anchor rod to solve the above problems. Content of the Utility Model

[0004] In order to solve the problem of easy waste of shorter anchor rods after cutting and increase of use cost; the purpose of the utility model is to provide a geotechnical support device for a negative Poisson's ratio anchor rod.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a geotechnical support device for a negative Poisson's ratio anchor rod, including a first anchor rod, a second anchor rod is installed outside the first anchor rod, circular plugs are fixedly arranged at the ends of the first anchor rod and the second anchor rod, an anchor head is installed at one end of the first anchor rod away from the second anchor rod, circular plugs and circular sockets are respectively arranged at both ends of the first anchor rod and the second anchor rod, and the circular plug of the second anchor rod is inserted into the circular socket of the first anchor rod; symmetrically distributed positioning holes are formed in the outer side of the second anchor rod near the first anchor rod, bolts are threadedly inserted into the positioning holes, and the bolts are threadedly inserted through the first anchor rod and the circular plug, thread rings are arranged on the outer sides of the first anchor rod and the second anchor rod, and a sealing gasket is installed in the positioning holes.

[0006] Preferably, the anchor head is installed outside the circular plug of the first anchor rod, connecting plates are fixedly arranged on the outer sides of the first anchor rod and the second anchor rod, mounting holes are formed in the connecting plates in an annular array distribution, and symmetrically distributed supporting blocks are installed outside the anchor head.

[0007] Preferably, a backing plate is movably sleeved outside the second anchor rod, a grout stopper is installed outside the backing plate, and the grout stopper is movably sleeved outside the second anchor rod; a nut is threadedly sleeved outside the second anchor rod; a protective pad is fixedly provided on one side of the backing plate away from the grout stopper, and the protective pad is located between the nut and the backing plate.

[0008] Preferably, the materials of the first anchor rod and the second anchor rod are both negative Poisson's ratio; a material conveying groove is formed in both the first anchor rod and the second anchor rod; a discharge port is formed in the anchor head, and the discharge port is connected to the material conveying groove.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] 1. In the present utility model, by setting structures such as the first anchor rod, the second anchor rod, the circular socket and the circular plug to cooperate with each other, the length of the anchor rod can be increased according to requirements, avoiding the trouble of cutting the anchor rod according to requirements, and avoiding the problem of waste caused by the shorter anchor rod after cutting, so as to achieve the purpose of conveniently adjusting the length of the anchor rod for use;

[0011] 2. In the present utility model, by setting structures such as the anchor head, the connecting plate and the mounting hole to cooperate with each other, the anchor head can be conveniently installed and disassembled, so that different specifications of anchor heads can be replaced according to requirements for actual use, and thus the purpose of conveniently adjusting and replacing is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 It is a schematic side view of the overall structure of the present utility model;

[0015] Figure 3 It is a schematic sectional view of the first anchor rod and its connection structure of the present utility model;

[0016] Figure 4 For the present utility model Figure 3 The enlarged structure schematic diagram at A in.

[0017] In the figure: 1. First anchor bolt; 11. Second anchor bolt; 12. Thread ring; 13. Base plate; 14. Grout plug; 15. Nut; 16. Protection pad; 17. Feeding trough; 2. Round plug; 21. Round socket; 22. Positioning hole; 23. Bolt; 24. Sealing gasket; 3. Anchor head; 31. Connecting plate; 32. Mounting hole; 33. Support block; 34. Discharge port. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment: As Figures 1-4 shown, the present invention provides a geotechnical support device for a negative Poisson's ratio anchor bolt, including a first anchor bolt 1. A second anchor bolt 11 is installed outside the first anchor bolt 1. Round plugs 2 are fixedly provided at the ends of both the first anchor bolt 1 and the second anchor bolt 11. An anchor head 3 is installed at one end of the first anchor bolt 1 away from the second anchor bolt 11. Round plugs 2 and round sockets 21 are respectively provided at both ends of the first anchor bolt 1 and the second anchor bolt 11. The round plug 2 of the second anchor bolt 11 is inserted into the round socket 21 of the first anchor bolt 1; Symmetrically distributed positioning holes 22 are opened on the outer side of the second anchor bolt 11 near the first anchor bolt 1, which can increase the length of the anchor bolt according to requirements, avoid the trouble caused by cutting the anchor bolt according to requirements, and avoid the problem of waste caused by the shorter anchor bolt after cutting, so as to achieve the purpose of conveniently adjusting the length of the anchor bolt for use; A bolt 23 is threadedly inserted into the positioning hole 22, and the bolt 23 is threadedly inserted through the first anchor bolt 1 and the round plug 2. Thread rings 12 are provided on the outer sides of both the first anchor bolt 1 and the second anchor bolt 11, which is convenient for the nut 15 to install the whole device, and at the same time can increase the adhesion of the slurry and increase the stability. A sealing gasket 24 is installed in the positioning hole 22 to protect the positioning hole 22.

[0020] The anchor head 3 is installed outside the round plug 2 of the first anchor bolt 1. Connecting plates 31 are fixedly provided on the outer sides of both the first anchor bolt 1 and the second anchor bolt 11. Mounting holes 32 distributed in an annular array are opened in the connecting plates 31. Support blocks 33 distributed symmetrically are installed on the outer side of the anchor head 3. The anchor head 3 is installed on the outer side of the connecting plate 31 by screws. In addition to installing the anchor head 3, the connecting plate 31 can also position the whole anchor bolt, so that it contacts the inner wall of the hole, which can prevent the anchor bolt from tilting, etc., and is used to assist the positioning of the anchor bolt.

[0021] By adopting the above technical solution, the anchor heads 3 of different specifications can be replaced according to requirements for actual use, thereby achieving the purpose of convenient adjustment and replacement.

[0022] A backing plate 13 is movably sleeved outside the second anchor bolt 11, and a grout stopper 14 is installed outside the backing plate 13. The grout stopper 14 is movably sleeved outside the second anchor bolt 11.

[0023] By adopting the above technical solution, the backing plate 13 covers the hole, and the grout stopper 14 is used to block the hole to prevent the slurry from leaking out.

[0024] A nut 15 is threadedly sleeved outside the second anchor bolt 11.

[0025] By adopting the above technical solution, the nut 15 can squeeze the backing plate 13, thereby covering the hole.

[0026] A protective pad 16 is fixedly provided on the side of the backing plate 13 away from the grout stopper 14. The protective pad 16 is located between the nut 15 and the backing plate 13.

[0027] By adopting the above technical solution, the protective pad 16 serves the purpose of buffering to prevent the backing plate 13 from cracking due to excessive force.

[0028] The materials of the first anchor bolt 1 and the second anchor bolt 11 are both negative Poisson's ratio.

[0029] By adopting the above technical solution, a material with a negative Poisson's ratio will expand laterally when stretched, that is, its Poisson's ratio is less than zero.

[0030] Feeding grooves 17 are formed in both the first anchor bolt 1 and the second anchor bolt 11.

[0031] By adopting the above technical solution, the feeding grooves 17 facilitate grouting into the holes.

[0032] A discharge port 34 is formed in the anchor head 3, and the discharge port 34 is connected to the feeding groove 17.

[0033] By adopting the above technical solution, the slurry enters the hole through the discharge port 34.

[0034] Working principle: During installation, first adjust the length of the anchor rod according to the requirements of the actual hole. First, insert the circular plug 2 of the second anchor rod 11 into the circular socket 21 of the first anchor rod 1, and then install the bolt 23 through the positioning hole 22 so that the bolt 23 is inserted into the first anchor rod 1 and the circular plug 2, thus completing the installation connection of the first anchor rod 1 and the second anchor rod 11. Then, continue to adjust the overall length of the anchor rod by the above method to avoid the problem of waste of shorter anchor rods caused by cutting to adjust the length, so as to facilitate the adjustment of the overall length of the anchor rod. Then, install the anchor head 3 on the outside of the connecting plate 31 by screws, so that different specifications of anchor heads 3 can be replaced according to needs for actual use, and thus the purpose of convenient adjustment and replacement is achieved. Subsequently, install the backing plate 13, the grout plug 14 and the nut 15 at the other end, and then the whole anchor rod can be inserted into the hole from the anchor head 3. After insertion is completed, the hole can be grouted through the material conveying groove 17 or by external equipment. Finally, the whole device is positioned and installed by the nut 15, the backing plate 13 and the grout plug 14.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications therein.

Claims

1. A negative Poisson's ratio anchor rock support device, comprising an anchor rod (1), characterized in that: A No. 2 anchor rod (11) is installed outside the No. 1 anchor rod (1), and circular plugs (2) are fixedly provided at the ends of the No. 1 anchor rod (1) and the No. 2 anchor rod (11), and an anchor head (3) is installed at one end of the No. 1 anchor rod (1) away from the No. 2 anchor rod (11), and circular plugs (2) and circular sockets (21) are provided at both ends of the No. 1 anchor rod (1) and the No. 2 anchor rod (11), respectively, and the circular plug (2) of the No. 2 anchor rod (11) is inserted into the circular socket (21) of the No. 1 anchor rod (1); The outer side of one end of the second anchor rod (11) close to the first anchor rod (1) is provided with symmetrically distributed positioning holes (22), the inner thread of the positioning hole (22) is provided with a bolt (23), the thread of the bolt (23) penetrates through the first anchor rod (1) and the circular plug (2), the outer sides of the first anchor rod (1) and the second anchor rod (11) are both provided with a threaded ring (12), and a sealing gasket (24) is installed in the positioning hole (22).

2. A negative Poisson's ratio anchor rock support device according to claim 1, characterized in that: The anchor head (3) is mounted on the outside of the circular plug (2) of the first anchor rod (1); the outsides of the first anchor rod (1) and the second anchor rod (11) are fixed with a connecting plate (31); the connecting plate (31) is provided with mounting holes (32) distributed in a circular array; the outside of the anchor head (3) is installed with symmetrically distributed support blocks (33); the anchor head (3) is mounted on the outside of the connecting plate (31) by means of screws.

3. A negative Poisson's ratio anchor rock support device according to claim 1, characterized in that: A backing plate (13) is movably sleeved outside the second anchor rod (11), a grout stopper (14) is installed outside the backing plate (13), and the grout stopper (14) is movably sleeved outside the second anchor rod (11).

4. A negative Poisson's ratio anchor rock support device as claimed in claim 3, characterized in that: The outer side of the second anchor rod (11) is threadedly sleeved with a nut (15).

5. A negative Poisson's ratio anchor rock support device as claimed in claim 4, characterized in that: A protection pad (16) is fixedly provided on a side of the backing plate (13) away from the slurry stopper (14), and the protection pad (16) is located between the nut (15) and the backing plate (13).

6. A negative Poisson's ratio anchor rock support device according to claim 1, characterized in that: The materials of the No. 1 anchor rod (1) and the No. 2 anchor rod (11) both have a negative Poisson's ratio.

7. A negative Poisson's ratio anchor rock support device according to claim 1, characterized in that: The first anchor rod (1) and the second anchor rod (11) are both provided with a material conveying trough (17).

8. A negative Poisson's ratio anchor rock support device as claimed in claim 7, characterized in that: A discharge port (34) is provided in the anchor head (3), and the discharge port (34) is connected to the feed trough (17).

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