Slope protection anchor rod with good protection performance for bridge and tunnel engineering

Abstract

The utility model discloses a slope protection anchor rod with good protection performance for bridge and tunnel engineering, which belongs to the technical field of slope protection anchor rods, and is characterized by comprising an anchor rod body, a conical sleeve, a fixing plate, a fixing nut and a grouting hole, the bottom of the anchor rod body is fixedly connected with a limiting block, and a locking mechanism is arranged on the surface of the limiting block. The problems that after most of existing slope protection anchor rods are placed in a pre-drilled hole, a grouting hole makes contact with the deepest position of the hole, soil in the hole blocks a grouting opening, cement paste is not conveniently and rapidly injected into the hole through the grouting hole, and the grouting hole is blocked are solved. And after the slope protection anchor rod is inserted into the hole, the anchor rod needs to be rotated, so that an expansion structure at the bottom of the slope protection anchor rod expands to be in contact with the inner wall of the hole to limit the slope protection anchor rod, the step of constructing the slope protection anchor rod is increased by rotating the slope protection anchor rod, the construction efficiency of the slope protection anchor rod is influenced, and the use effect is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of slope protection anchor rods, and particularly relates to a slope protection anchor rod for bridge and tunnel projects with good protection performance. Background Technique

[0002] An anchor rod is the most basic component of roadway support in contemporary coal mines. It reinforces the surrounding rock of the roadway together, enabling the surrounding rock to support itself. Anchor rods are not only used in mines but also in engineering technologies to reinforce the main bodies of slopes, tunnels, and dams.

[0003] Currently, a Chinese patent with the publication number CN218624282U discloses a slope protection anchor rod for bridge and tunnel projects with good protection performance, including an outer rod. An inner groove is provided on the inner wall of the outer rod, and a threaded wall is threadedly connected to the inner wall of the inner groove. An inner rod is fixedly connected to the inner wall of the threaded wall. A positioning cone is fixedly connected to the lower surface of the inner rod, and a first slurry outlet is penetrated through the outer wall of the positioning cone. In this utility model, first, the device is inserted into the mountain body. At this time, the inner rod is fixed in the mountain body by rotating the inner rod. The slurry inlet pipe is inserted into the slurry inlet. At this time, the slurry flows out through the first slurry outlet and the second slurry outlet. Through this design, the effect of facilitating the outflow of the slurry is achieved. When the positioning screw is installed into the screw hole on the protection plate by rotating the positioning screw, the device is fixed on the mountain body. Through this design, the effect of facilitating the fixation of the device is achieved, and at the same time, the risk of the device falling off is prevented, enhancing the protection performance of the device.

[0004] After most of the existing slope protection anchor rods are placed in the pre-drilled holes, the grouting holes will contact the deepest part of the holes, resulting in the soil inside the holes blocking the grouting ports, thus making it inconvenient for the cement slurry to quickly pass through the grouting holes and be injected into the holes. And after the slope protection anchor rod is inserted into the hole, the anchor rod needs to be rotated to make the expansion structure at the bottom of the slope protection anchor rod expand and contact the inner wall of the hole to limit the slope protection anchor rod. Rotating the slope protection anchor rod increases the construction steps of the slope protection anchor rod, affecting the construction efficiency of the slope protection anchor rod and thus affecting the use effect. Content of the Utility Model

[0005] The utility model provides a slope protection anchor rod for bridge and tunnel projects with good protection performance, aiming to solve the problem that after most of the existing slope protection anchor rods are placed in the pre-drilled holes, the grouting holes will contact the deepest part of the holes, resulting in the soil inside the holes blocking the grouting ports, thus making it inconvenient for the cement slurry to quickly pass through the grouting holes and be injected into the holes. And after the slope protection anchor rod is inserted into the hole, the anchor rod needs to be rotated to make the expansion structure at the bottom of the slope protection anchor rod expand and contact the inner wall of the hole to limit the slope protection anchor rod. Rotating the slope protection anchor rod increases the construction steps of the slope protection anchor rod, affecting the construction efficiency of the slope protection anchor rod and thus affecting the use effect.

[0006] The present utility model is realized as follows. A slope protection anchor rod for bridge and tunnel engineering with good protection performance includes an anchor rod body, a conical sleeve, a fixing plate, a fixing nut and a grouting hole. A limiting block is fixedly connected to the bottom of the anchor rod body, and a locking mechanism is arranged on the surface of the limiting block, and the number of the locking mechanisms is four;

[0007] The locking mechanism includes a spring, three conical blocks and a rotating plate. One side of the spring close to the limiting block is fixedly connected to the limiting block, one side of the spring close to the rotating plate is fixedly connected to the rotating plate, and one side of the conical block close to the rotating plate is fixedly connected to the rotating plate.

[0008] In order to achieve the effect of facilitating the rotation of the rotating plate, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, rotating blocks are fixedly connected to the surface of the rotating plate, and the number of the rotating blocks is two. One side of the rotating block close to the limiting block is fixedly connected to the limiting block.

[0009] In order to achieve the effect of facilitating the injection of cement into the pre-drilled hole, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, a through hole is opened in the limiting block, and the grouting hole is communicated with the through hole.

[0010] In order to achieve the effect of preventing the grouting hole from contacting the deepest part of the pre-drilled hole, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, support columns are fixedly connected to the bottom of the limiting block, and the number of the support columns is four.

[0011] In order to achieve the effect of facilitating the sealing of the grouting hole, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, a sealing cover is arranged at the top of the anchor rod body, a sealing plug is fixedly connected to the bottom of the sealing cover, and the surface of the sealing plug is in close contact with the inner wall of the grouting hole.

[0012] In order to achieve the effect of prolonging the service life of the sealing plug and facilitating the pulling of the sealing cover and the sealing plug, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, the material of the sealing plug is EPDM rubber, and a pull ring is fixedly connected to the top of the sealing cover.

[0013] In order to achieve the effect of making the limiting of the fixing plate more stable, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, limiting cones are fixedly connected to the bottom of the fixing plate, and the number of the limiting cones is several.

[0014] In order to achieve the effect of facilitating the holding of the fixing plate, as an optimization of the slope protection anchor rod for bridge and tunnel engineering with good protection performance of the present utility model, fixing blocks are fixedly connected to both sides of the top of the fixing plate, and anti-slip strips are fixedly connected to the surface of the fixing blocks, and the number of the anti-slip strips is several.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] For the slope protection bolt for bridge and tunnel engineering with good protection performance, by inserting the bolt rod body and the limiting block into the pre-drilled hole, and inserting the bolt rod body to the deepest part of the hole. At this time, the bottom of the support column contacts the deepest part of the hole, which can avoid the through hole contacting the deepest part of the hole, prevent the through hole and the grouting hole from being blocked, and avoid the problem that most of the existing slope protection bolts will cause the grouting hole to contact the deepest part of the hole after being placed in the pre-drilled hole, resulting in the soil inside the hole blocking the grouting port. After the limiting block is inserted in place, the spring rebounds and pushes the rotating plate. At this time, the conical block contacts the inner wall of the hole and inserts into the soil on the inner wall of the hole. At this time, the bolt rod body will be limited and cannot be pulled out of the hole, avoiding the problem that after the slope protection bolt is inserted into the hole, it is necessary to rotate the bolt, so that the expansion structure at the bottom of the slope protection bolt expands and contacts the inner wall of the hole to limit the slope protection bolt. Rotating the slope protection bolt increases the construction steps of the slope protection bolt and affects the construction efficiency of the slope protection bolt. Description of the Drawings

[0017] Figure 1 It is the overall structure diagram of the slope protection bolt for bridge and tunnel engineering with good protection performance of the present utility model;

[0018] Figure 2 It is the three-dimensional connection schematic diagram of the locking mechanism in the present utility model;

[0019] Figure 3 It is the three-dimensional exploded schematic diagram of the fixing plate and the bolt rod body in the present utility model;

[0020] Figure 4 It is the three-dimensional structure schematic diagram of the bottom of the fixing plate in the present utility model;

[0021] Figure 5 It is the three-dimensional connection schematic diagram of the fixing block and the anti-slip strip in the present utility model.

[0022] In the figure, 1. Bolt rod body; 2. Conical sleeve; 3. Sealing cover; 4. Fixing block; 5. Fixing plate; 6. Fixing nut; 7. Limiting block; 8. Support column; 9. Locking mechanism; 901. Spring; 902. Conical block; 903. Rotating plate; 10. Through hole; 11. Rotating block; 12. Sealing plug; 13. Pulling ring; 14. Limiting cone; 15. Anti-slip strip; 16. Grouting hole. Detailed Embodiments

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, in the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0025] Please refer to Figures 1-5 , the present utility model provides a technical solution: a slope protection anchor rod for bridge and tunnel engineering with good protection performance, including an anchor rod body 1, a tapered sleeve 2, a fixing plate 5, a fixing nut 6 and a grouting hole 16. A limiting block 7 is fixedly connected to the bottom of the anchor rod body 1, and a locking mechanism 9 is arranged on the surface of the limiting block 7, and the number of the locking mechanisms 9 is four;

[0026] The locking mechanism 9 includes a spring 901, three tapered blocks 902 and a rotating plate 903. One side of the spring 901 close to the limiting block 7 is fixedly connected to the limiting block 7, one side of the spring 901 close to the rotating plate 903 is fixedly connected to the rotating plate 903, and one side of the tapered block 902 close to the rotating plate 903 is fixedly connected to the rotating plate 903.

[0027] In this embodiment: By inserting the anchor rod body 1 and the limiting block 7 into a pre-drilled hole, and inserting the anchor rod body 1 to the deepest part of the hole. At this time, the bottom of the support column 8 contacts the deepest part of the hole, so that the through hole 10 can be prevented from contacting the deepest part of the hole, avoiding blocking the through hole 10 and the grouting hole 16. It can avoid the problem that after most of the existing slope protection anchor rods are placed in the pre-drilled holes, the grouting hole 16 will contact the deepest part of the hole, resulting in the soil inside the hole blocking the grouting port. After the limiting block 7 is inserted in place, the spring 901 rebounds and pushes the rotating plate 903. At this time, the tapered block 902 contacts the inner wall of the hole and inserts into the soil on the inner wall of the hole. At this time, the anchor rod body 1 will be limited and cannot be pulled out of the hole, avoiding the problem that after the slope protection anchor rod is inserted into the hole, it is necessary to rotate the anchor rod so that the expansion structure at the bottom of the slope protection anchor rod expands and contacts the inner wall of the hole to limit the slope protection anchor rod. Rotating the slope protection anchor rod increases the construction steps of the slope protection anchor rod and affects the construction efficiency of the slope protection anchor rod.

[0028] As a technical optimization solution of the utility model, two rotating blocks 11 are fixedly connected to the surface of the rotating plate 903, and one side of the rotating block 11 close to the limiting block 7 is fixedly connected to the limiting block 7.

[0029] In this embodiment: The rotating plate 903 is rotatably connected to the rotating block 11, and the rotating block 11 is fixedly connected to the limiting block 7, so that the rotating plate 903 can rotate, achieving the effect of facilitating the rotation of the rotating plate 903.

[0030] As a technical optimization solution of the utility model, a through hole 10 is opened inside the limiting block 7, and the grouting hole 16 is communicated with the through hole 10.

[0031] In this embodiment: By communicating the through hole 10 inside the limiting block 7 with the grouting hole 16, it is convenient to inject the cement slurry into the pre-drilled hole through the grouting hole 16 and the through hole 10, achieving the effect of facilitating the injection of cement into the interior of the pre-drilled hole.

[0032] As a technical optimization solution of the utility model, four support columns 8 are fixedly connected to the bottom of the limiting block 7.

[0033] In this embodiment: By inserting the anchor rod body 1 into the deepest part of the hole, at this time, the support column 8 at the bottom of the limiting block 7 will contact the deepest part of the hole, thus avoiding the contact between the through hole 10 and the deepest part of the hole and preventing the blockage of the through hole 10 and the grouting hole 16, achieving the effect of avoiding the contact between the grouting hole 16 and the deepest part of the pre-drilled hole.

[0034] As a technical optimization solution of the utility model, a sealing cover 3 is arranged at the top of the anchor rod body 1, a sealing plug 12 is fixedly connected to the bottom of the sealing cover 3, and the surface of the sealing plug 12 is in close contact with the inner wall of the grouting hole 16.

[0035] In this embodiment: By making the sealing plug 12 in close contact with the inner wall of the grouting hole 16, at this time, the sealing plug 12 can seal the grouting hole 16, achieving the effect of facilitating the sealing of the grouting hole 16.

[0036] As a technical optimization solution of the utility model, the sealing plug 12 is made of EPDM rubber, and a pull ring 13 is fixedly connected to the top of the sealing cover 3.

[0037] In this embodiment: Since the sealing plug 12 is made of EPDM rubber and EPDM rubber has strong weather resistance, the service life of the sealing plug 12 can be extended, providing more reliable protection against water ingress for the slope protection anchor. By holding the pull ring 13 and pulling the pull ring 13, the sealing cover 3 and the sealing plug 12 can be pulled, achieving the effects of extending the service life of the sealing plug 12 and facilitating the pulling of the sealing cover 3 and the sealing plug 12.

[0038] As a technical optimization solution of the utility model, a limit cone 14 is fixedly connected to the bottom of the fixed plate 5, and the number of the limit cones 14 is several.

[0039] In this embodiment: By sleeving the conical sleeve 2 and the fixed plate 5 on the surface of the anchor rod body 1, and then threadedly connecting the fixing nut 6 to the anchor rod body 1, at this time, the limit cone 14 will be embedded into the soil inside the slope of the bridge tunnel, making the stability of the fixed block 4 higher, achieving the effect of making the limit of the fixed plate 5 more stable.

[0040] As a technical optimization solution of the utility model, fixed blocks 4 are fixedly connected to both sides of the top of the fixed plate 5, and anti-slip strips 15 are fixedly connected to the surfaces of the fixed blocks 4, and the number of the anti-slip strips 15 is several.

[0041] In this embodiment: By holding the fixed block 4 by hand, at this time, the surface of the anti-slip strip 15 contacts the hand, and then it is convenient to hold the fixed plate 5, achieving the effect of convenient holding of the fixed plate 5.

[0042] Working principle: First, insert the bolt body 1 and the limit block 7 into the pre-drilled hole. Insert the bolt body 1 to the deepest part of the hole. At this time, the support column 8 at the bottom of the limit block 7 will contact the deepest part of the hole, which can prevent the through hole 10 from contacting the deepest part of the hole, avoid blocking the through hole 10 and the grouting hole 16, and avoid the problem that most of the existing slope protection bolts will cause the grouting hole 16 to contact the deepest part of the hole after being inserted into the pre-drilled hole, resulting in the soil inside the hole blocking the grouting port, thus making it inconvenient for the cement slurry to quickly pass through the grouting hole 16 and be injected into the hole. Since the rotating plate 903 is rotatably connected to the rotating block 11, during the process of inserting the limit block 7 into the hole, the spring 901 is compressed, and the rotating plate 903 rotates towards the side close to the limit block 7. At this time, the limit block 7 can be smoothly inserted into the hole. When the limit block 7 is inserted to the deepest part of the hole, the spring 901 rebounds and pushes the rotating plate 903. At this time, the conical block 902 contacts the inner wall of the hole and inserts into the soil of the inner wall of the hole. At this time, the bolt body 1 will be limited and cannot be pulled out of the hole. Then, inject the cement slurry into the hole through the grouting hole 16 and the through hole 10. Wait for the cement slurry to solidify to completely fix the bolt body 1, improving the convenience of slope protection bolt construction and avoiding the need to rotate the slope protection bolt after inserting it into the hole in the existing method, which makes the expansion structure at the bottom of the slope protection bolt expand and contact the inner wall of the hole to limit the slope protection bolt. Rotating the slope protection bolt increases the construction steps of the slope protection bolt and affects the construction efficiency of the slope protection bolt. Then, sleeved the conical sleeve 2 and the fixing plate 5 on the surface of the bolt body 1, and then threadedly connect the fixing nut 6 to the bolt body 1. At this time, the limit cone 14 will be embedded in the soil of the bridge tunnel slope, making the fixing block 4 more stable and improving the protection of the bolt body 1 for the bridge tunnel. Finally, make the sealing plug 12 be in close contact with the inner wall of the grouting hole 16. At this time, the sealing plug 12 can seal the grouting hole 16, avoid rainwater entering the grouting hole 16 and soaking the inside of the slope protection bolt for a long time, and shorten the service life of the slope protection bolt. Since the material of the sealing plug 12 is EPDM rubber, and EPDM rubber has strong weather resistance, the service life of the sealing plug 12 can be extended, providing more reliable anti-water ingress protection for the slope protection bolt.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slope protection anchor rod for bridge and tunnel engineering with good protection performance, comprising an anchor rod body (1), a conical sleeve (2), a fixing plate (5), a fixing nut (6) and a grouting hole (16), characterized in that: A limiting block (7) is fixedly connected to the bottom of the bolt rod body (1), and a locking mechanism (9) is arranged on the surface of the limiting block (7), and the number of the locking mechanisms (9) is four; The locking mechanism (9) includes a spring (901), three conical blocks (902) and a rotating plate (903). One side of the spring (901) close to the limiting block (7) is fixedly connected to the limiting block (7), one side of the spring (901) close to the rotating plate (903) is fixedly connected to the rotating plate (903), and one side of the conical block (902) close to the rotating plate (903) is fixedly connected to the rotating plate (903).

2. The slope protection bolt for bridge and tunnel engineering with good protection performance according to claim 1, characterized in that: A rotating block (11) is fixedly connected to the surface of the rotating plate (903), and the number of the rotating blocks (11) is two. One side of the rotating block (11) close to the limiting block (7) is fixedly connected to the limiting block (7).

3. The slope protection anchor rod for bridge and tunnel engineering with good protection performance according to claim 1, characterized in that: A through hole (10) is formed in the limiting block (7), and the grouting hole (16) is communicated with the through hole (10).

4. A slope protection anchor rod for bridge and tunnel engineering with good protection performance, characterized in that: A support column (8) is fixedly connected to the bottom of the limiting block (7), and the number of the support columns (8) is four.

5. The slope protection bolt for bridge and tunnel engineering with good protection performance according to claim 1, characterized in that: A sealing cover (3) is arranged at the top of the bolt rod body (1), a sealing plug (12) is fixedly connected to the bottom of the sealing cover (3), and the surface of the sealing plug (12) is in close contact with the inner wall of the grouting hole (16).

6. The slope protection anchor rod for bridge and tunnel engineering with good protection performance according to claim 5, characterized in that: The sealing plug (12) is made of EPDM rubber, and a pull ring (13) is fixedly connected to the top of the sealing cover (3).

7. A slope protection anchor rod for bridge and tunnel engineering with good protection performance, characterized in that: A limiting cone (14) is fixedly connected to the bottom of the fixing plate (5), and the number of the limiting cones (14) is several.

8. A slope protection anchor rod for bridge and tunnel engineering with good protection performance, characterized in that: Fixing blocks (4) are fixedly connected to both sides of the top of the fixing plate (5), and anti-slip strips (15) are fixedly connected to the surfaces of the fixing blocks (4), and the number of the anti-slip strips (15) is several.

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