A type of slope protection anchor

Abstract

This utility model relates to the field of anchor bolt technology, and in particular to a slope protection anchor bolt, comprising an anchor bolt body and a drill bit. One end of the anchor bolt body is threadedly connected to the drill bit, and the other end of the anchor bolt body is fixedly connected to a first cylinder. The other end of the first cylinder is coaxially fixedly connected to a second cylinder. A first sleeve and a second sleeve are threadedly connected to the outer sides of the first cylinder and the second cylinder, respectively. An annular groove is provided on the outer side of the second sleeve, and multiple sliders are slidably connected in the annular groove. Multiple fixing blocks are fixedly arranged circumferentially at equal intervals on the outer wall of the first cylinder. Multiple arc-shaped support plates are provided on the outer sides of the first cylinder and the second cylinder. A first connecting plate is provided between the arc-shaped support plates and the sliders, and a second connecting plate is provided between the arc-shaped support plates. This utility model ensures the integrity of the anchor hole, provides stable support for the anchor bolt before grouting, and improves the overall stability of the anchoring system.

Description

Technical Field

[0001] This utility model relates to the field of anchor technology, and more specifically to a slope protection anchor. Background Technology

[0002] In slope protection engineering, anchor bolts are core components that restrain soil deformation and improve slope stability; their anchoring performance directly determines the protection effect. Existing patents often optimize the bolt structure to enhance mechanical interlocking and strengthen the bond between the anchor bolt and the soil before grouting.

[0003] For example, Chinese utility model patent CN221193316U discloses a slope protection anchor bolt, which includes a stabilizing spike; Chinese utility model patent CN221421927U discloses a slope protection anchor bolt for cohesive soil, which includes a wedge-shaped block; Chinese utility model patent CN222183324U discloses a highly stable anchor bolt for slope protection, which includes a stabilizing nail; and Chinese utility model patent CN221193315U discloses an environmentally friendly anchor bolt for slope protection, which includes a stabilizing block.

[0004] The aforementioned patents all design stable structures inserted into the soil layer of the anchor hole to improve the stability of the anchor rod in the anchor hole before grouting. However, such structures have significant drawbacks in practical applications: after these inserted components are inserted into the soil layer, they are prone to causing disturbance of the hole wall or even hole collapse. Hole collapse not only damages the integrity of the hole wall, making it difficult for the grout to fully fill the cavity, forming local voids or loose areas, and significantly reducing the bond strength between the anchor rod and the grout, and between the grout and the stratum, directly weakening the anchoring force; it may also create stress concentration zones due to the collapse of the hole wall soil, exacerbating the risk of local slope instability. If the collapse spreads, it may even trigger a chain of landslides, threatening the safety of the project. In addition, secondary cleaning and grouting repair processes are required after hole collapse, which not only prolongs the construction period but also increases construction costs and reduces the economic efficiency of the project. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this utility model is to provide a slope protection anchor rod that ensures the integrity of the anchor hole and improves the overall stability of the anchoring system.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A slope protection anchor bolt includes an anchor bolt body and a drill bit. One end of the anchor bolt body is threadedly connected to the drill bit, and the other end of the anchor bolt body is fixedly connected to a first cylinder. The other end of the first cylinder, away from the anchor bolt body, is coaxially fixedly connected to a second cylinder. The outer sides of the first and second cylinders are respectively provided with a first threaded section and a second threaded section. The first and second threaded sections are respectively threadedly connected to a first sleeve and a second sleeve. An annular groove is formed on the outer side of the second sleeve, and multiple sliders are slidably connected in the annular groove. Multiple fixing blocks are fixedly arranged circumferentially at equal intervals on the outer wall of the first cylinder. Multiple arc-shaped support plates are provided on the outer sides of the first and second cylinders. The arc-shaped support plates correspond one-to-one with the sliders and fixing blocks. A first connecting plate is provided between the arc-shaped support plates and the sliders. The two ends of the first connecting plate are respectively hinged to the arc-shaped support plates and the sliders. A second connecting plate is provided between the arc-shaped support plates and the arc-shaped support plates. The two ends of the second connecting plate are respectively hinged to the arc-shaped support plates and the fixing blocks.

[0008] Furthermore, a rubber pad is provided on the outer wall of the arc-shaped support plate.

[0009] Furthermore, both the annular groove and the slider have T-shaped cross-sections.

[0010] Furthermore, anti-slip textures are provided on the outer walls of the first and second sleeves.

[0011] Furthermore, the inner diameters of the anchor rod body, the first cylinder body, and the second cylinder body are the same, the outer diameter of the first cylinder body is smaller than the outer diameter of the anchor rod body, and the outer diameter of the second cylinder body is smaller than the outer diameter of the first cylinder body.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This application achieves controllable expansion and contraction of the arc-shaped support plate through the threaded transmission of the first and second sleeves and the linkage of the connecting plate. This avoids the direct piercing of the hole wall by traditional insert-type components, fundamentally eliminating the risk of hole wall disturbance and hole collapse caused by the insertion action, and ensuring the integrity of the anchor hole. The arc-shaped support plate has surface contact with the hole wall, with a large contact area and uniform force distribution. It can provide stable support for the anchor rod before grouting, ensuring that the anchor rod is centered in the anchor hole and improving the overall stability of the anchoring system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention;

[0016] Figure 3This is a partial sectional view of the present invention.

[0017] 1. Anchor rod body; 2. Drill bit; 3. First cylinder body; 4. Second cylinder body; 5. First sleeve; 6. Second sleeve; 601. Annular groove; 7. Sliding block; 8. Fixing block; 9. Arc-shaped support plate; 10. First connecting plate; 11. Second connecting plate. Detailed Implementation

[0018] like Figures 1 to 3 As shown, a slope protection anchor bolt includes an anchor bolt body 1 and a drill bit 2. One end of the anchor bolt body 1 is threadedly connected to the drill bit 2, and the other end of the anchor bolt body 1 is fixedly connected to a first cylinder 3. The other end of the first cylinder 3, away from the anchor bolt body 1, is coaxially fixedly connected to a second cylinder 4. The outer sides of the first cylinder 3 and the second cylinder 4 are respectively provided with a first threaded section and a second threaded section. The first threaded section and the second threaded section are respectively threadedly connected to a first sleeve 5 and a second sleeve 6. An annular groove 601 is opened on the outer side of the second sleeve 6, and a sliding connection is made within the annular groove 601. Multiple sliders 7 are connected. Multiple fixing blocks 8 are fixedly arranged circumferentially at equal intervals on the outer wall of the first cylinder 3. Multiple arc-shaped support plates 9 are provided on the outer side of the first cylinder 3 and the second cylinder 4. The arc-shaped support plates 9 correspond one-to-one with the sliders 7 and the fixing blocks 8. A first connecting plate 10 is provided between the arc-shaped support plate 9 and the slider 7. The two ends of the first connecting plate 10 are respectively hinged to the arc-shaped support plate 9 and the slider 7. A second connecting plate 11 is provided between the arc-shaped support plates 9 and the slider 7. The two ends of the second connecting plate 11 are respectively hinged to the arc-shaped support plate 9 and the fixing blocks 8.

[0019] A rubber pad is provided on the outer wall of the arc-shaped support plate 9. The rubber pad can increase the friction with the hole wall, prevent the arc-shaped support plate 9 from slipping, and improve the support stability. At the same time, the elastic deformation of the rubber can buffer the support force, avoid the disturbance of the hole wall by rigid contact, further reduce the risk of hole collapse, and adapt to the slight unevenness of the hole wall.

[0020] Both the annular groove 601 and the slider 7 have T-shaped cross-sections.

[0021] The outer walls of the first sleeve 5 and the second sleeve 6 are provided with anti-slip texture.

[0022] The inner diameters of the anchor rod body 1, the first cylinder body 3, and the second cylinder body 4 are the same. The outer diameter of the first cylinder body 3 is smaller than the outer diameter of the anchor rod body 1, and the outer diameter of the second cylinder body 4 is smaller than the outer diameter of the first cylinder body 3.

[0023] Working principle:

[0024] Before construction, the first sleeve 5 is close to the anchor rod body 1, and the second sleeve 6 is away from the anchor rod body 1. At this time, the first connecting plate 10 and the second connecting plate 11 are folded, and the arc-shaped support plate 9 is close to the first sleeve 5 and the second sleeve 6. The overall structure is compact and facilitates the insertion of the anchor rod into the anchor hole.

[0025] After the anchor bolt is inserted into the anchor hole, the second sleeve 6 is rotated to rotate along the threaded section towards the anchor bolt body 1. When the second sleeve 6 rotates, the first connecting plate 10 pushes the arc-shaped support plate 9 to unfold outward. At the same time, the fixing block 8 is fixed in position, and the second connecting plate 11 rotates synchronously with the unfolding support plate to form a stable support structure. The second sleeve 6 is stopped rotating when the arc-shaped support plate 9 contacts the inner wall of the anchor hole and reaches the preset support force, thus completing the support positioning.

[0026] After the arc-shaped support plate 9 is unfolded, the anchor rod body remains centered in the anchor hole. The anchor hole is grouted by the bottom-groove grouting method. The grout fills the anchor hole and the gaps between the components. After solidification, it forms an integral load-bearing structure with the arc-shaped support plate 9 and the anchor rod body 1, transferring the slope tension to the stable stratum.

[0027] This utility model replaces the traditional insert-type structure with an externally supported arc-shaped support plate. The support plate is in surface contact with the hole wall and the support force is controllable. There is no puncture action, which avoids hole wall disturbance from the design source and solves the hole collapse problem caused by insert-type components in existing patents. It ensures the integrity of the anchor hole and the stability of the slope. The support plate ensures that the anchor rod is centered and the grout can be evenly filled into the cavity, avoiding voids or weak layers.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A slope protection anchor rod, characterized by: The system includes an anchor rod body (1) and a drill bit (2). One end of the anchor rod body (1) is threadedly connected to the drill bit (2), and the other end of the anchor rod body (1) is fixedly connected to a first cylinder (3). The other end of the first cylinder (3) away from the anchor rod body (1) is coaxially fixedly connected to a second cylinder (4). The outer sides of the first cylinder (3) and the second cylinder (4) are respectively provided with a first threaded section and a second threaded section. The first threaded section and the second threaded section are respectively threadedly connected to a first sleeve (5) and a second sleeve (6). An annular groove (601) is opened on the outer side of the second sleeve (6), and multiple sliders (7) are slidably connected in the annular groove (601). Multiple fixing blocks (8) are fixedly arranged circumferentially at equal intervals on the outer wall of the first cylinder (3). Multiple arc-shaped support plates (9) are provided on the outer side of the first cylinder (3) and the second cylinder (4). The arc-shaped support plates (9), sliders (7), and fixing blocks (8) correspond one-to-one. A first connecting plate (10) is provided between the arc-shaped support plates (9) and the sliders (7). The two ends of the first connecting plate (10) are respectively hinged to the arc-shaped support plates (9) and the sliders (7). A second connecting plate (11) is provided between the arc-shaped support plates (9) and the arc-shaped support plates (9). The two ends of the second connecting plate (11) are respectively hinged to the arc-shaped support plates (9) and the fixing blocks (8).

2. The slope protection anchor of claim 1, wherein: A rubber pad is provided on the outer wall of the arc-shaped support plate (9).

3. The slope protection anchor of claim 1, wherein: The cross-sections of the annular groove (601) and the slider (7) are both T-shaped structures.

4. The slope protection anchor of claim 1, wherein: The outer walls of the first sleeve (5) and the second sleeve (6) are provided with anti-slip texture.

5. The slope protection anchor of claim 1, wherein: The inner diameters of the anchor rod (1), the first cylinder (3), and the second cylinder (4) are the same. The outer diameter of the first cylinder (3) is smaller than the outer diameter of the anchor rod (1), and the outer diameter of the second cylinder (4) is smaller than the outer diameter of the first cylinder (3).

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