Tunnel concrete side wall anchor rod

Abstract

The utility model discloses a tunnel concrete side wall anchor rod which is characterized in that slurry discharge holes are formed in the surface of the middle of an anchor head at equal intervals in the circumferential direction, a connecting rod is fixedly installed on the top of the interior of the anchor head, a guide column is fixedly installed in the middle of the bottom end of the connecting rod, and a fixed cylinder is fixedly connected to the bottom end of the guide column. The piston plate and the supporting inclined rod are supported, the positions of the piston plate and the supporting inclined rod are kept unchanged, then when the anchor head is inserted into a wall for tunnel construction, the supporting inclined rod cannot be clamped, meanwhile, the guide column plays a role in guiding the piston plate, and the piston plate slides along the guide column when being impacted by injected concrete grout, so that the anchor head is prevented from falling off. The deformable metal strip can be bent and deformed under stress, then the supporting inclined rod can slide, the end of the supporting inclined rod is inserted into a wall, the stability of the anchor head is improved, the anchor rod is not prone to falling off during installation, and the situation that the anchor rod shakes and is unstable due to impact when grout is injected is prevented.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a tunnel concrete sidewall anchor. Background Technology

[0002] Tunnels are engineering structures buried underground, representing a form of human utilization of underground space. Tunnel anchors are a type of reinforced concrete support material. In tunnel construction in soft soil, the surrounding rock is often reinforced for safety. A common reinforcement method is anchor grouting. Anchor grouting first requires drilling holes in the surrounding rock according to design calculations. Then, grout is injected into the anchors, causing the surrounding rock to bind together as a whole, thus supporting the excavated tunnel and ensuring construction safety. The use of tunnel anchors can greatly improve the stability and safety of tunnels and reduce the occurrence of tunnel accidents.

[0003] However, currently, anchor bolts cannot be fixed when inserted into the predetermined installation hole, causing the anchor bolts to shake continuously due to the impact force generated during grout injection. This results in unstable anchor bolt installation and reduces the grouting solidification effect. Therefore, this utility model provides a tunnel concrete sidewall anchor bolt to meet people's needs. Utility Model Content

[0004] This utility model provides a tunnel concrete sidewall anchor rod, which can effectively solve the problem mentioned in the background art that the anchor rod cannot be fixed in the predetermined installation hole, causing the anchor rod to shake continuously due to the impact force generated during grout injection, resulting in unstable anchor rod installation and reduced grouting solidification effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tunnel concrete sidewall anchor bolt, comprising a rod body, a grouting through hole in the middle of the rod body, an anchor head fixedly connected to the bottom end of the rod body, a pad sleeved on the surface of the rod body, a locking nut installed on the top of the pad, grout discharge holes equidistantly opened on the surface of the middle part of the anchor head along the circumferential direction, a connecting rod fixedly installed at the top inside the anchor head, a guide column fixedly installed at the middle of the bottom end of the connecting rod, a fixed cylinder fixedly connected to the bottom end of the guide column, deformable metal strips fixedly fixedly connected at equidistantly along the circumferential direction on the surface of the fixed cylinder, a piston plate movably embedded in the middle of the inside of the anchor head, and a supporting inclined rod fixedly connected at equidistantly along the circumferential direction at the bottom of the piston plate;

[0006] A sealing plug is installed at the top of the rod, and an operating bar is fixedly connected to the top of the sealing plug. A sealing sleeve is installed on the surface of the top of the rod.

[0007] Preferably, the horizontal plane of the piston plate is higher than the horizontal plane of the slurry discharge hole, the guide column moves through the middle of the piston plate, and the edge of the piston plate is tightly fitted with the inner wall of the anchor head.

[0008] Preferably, the deformable metal strips and the supporting diagonal rods are of the same number and are in one-to-one correspondence. The ends of the deformable metal strips are connected to the supporting diagonal rods, and the bottom edge of the supporting diagonal rods is flush with the surface of the anchor head.

[0009] Preferably, the bottom of the sealing plug is embedded inside the grouting through hole, the sealing sleeve and the rod body are connected by threads, and the sealing sleeve is tightly attached to the top of the operating bar.

[0010] Preferably, a movable sleeve is fixedly connected to the bottom end of the pad, and positioning strips are fixedly connected at equal intervals along the circumferential direction on the surface of the movable sleeve.

[0011] Preferably, the movable sleeve is movably fitted onto the outside of the rod body, and the positioning strip is made of corrosion-resistant rubber with a rounded surface.

[0012] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is scientific and reasonable, and it is safe and convenient to use.

[0013] 1. The system is equipped with a connecting rod, guide column, fixed cylinder, deformable metal strip, piston plate, and supporting diagonal rod. The deformable metal strip supports the piston plate and supporting diagonal rod, keeping their positions stable. This prevents the supporting diagonal rod from getting stuck when the anchor head is inserted into the tunnel wall. Simultaneously, the guide column guides the piston plate, allowing it to slide along the guide column when impacted by injected concrete grout. The deformable metal strip bends under pressure, allowing the supporting diagonal rod to slide and insert its end into the wall. This improves the stability of the anchor head, preventing it from easily falling off during installation and avoiding instability caused by grout injection impact.

[0014] 2. It is equipped with a sealing plug, an operating strip, and a sealing sleeve. The sealing plug is used to easily block the grouting hole at the end of the anchor rod, preventing grout from flowing out during the cooling and solidification process. At the same time, the sealing sleeve can lock and fix the sealing plug, making the installation and embedding of the sealing plug simpler, improving the sealing performance, and preventing the sealing plug from easily falling off, making the operation more convenient.

[0015] 3. It is equipped with a movable sleeve and a positioning strip. The movable sleeve and the positioning strip work together to position the rod. The positioning strip fits against the inner wall of the hole where the anchor rod is installed, so that the rod does not come into contact with the inner wall of the hole. As a result, the rod is in the center of the hole, and the injected grout is more evenly distributed. This prevents the rod from tilting and causing one side to not adhere to the grout, which would result in the anchor rod not being firmly fixed. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the positioning strip of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the sealing plug of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the piston plate of this utility model;

[0022] Labels in the diagram: 1. Rod body; 2. Grouting through hole; 3. Anchor head; 4. Pad; 5. Locking nut; 6. Grout discharge hole; 7. Connecting rod; 8. Guide column; 9. Fixed cylinder; 10. Deformable metal strip; 11. Piston plate; 12. Supporting diagonal rod; 13. Sealing plug; 14. Operating bar; 15. Sealing sleeve; 16. Movable sleeve; 17. Positioning bar. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Example: Figure 1-4As shown, this utility model provides a technical solution: a tunnel concrete sidewall anchor bolt, including a rod body 1, a grouting through hole 2 in the middle of the rod body 1, an anchor head 3 fixedly connected to the bottom end of the rod body 1, a pad 4 sleeved on the surface of the rod body 1, a locking nut 5 installed on the top of the pad 4, grout discharge holes 6 equidistantly opened along the circumferential direction on the surface of the middle part of the anchor head 3, a connecting rod 7 fixedly installed at the top inside the anchor head 3, a guide column 8 fixedly installed at the middle of the bottom end of the connecting rod 7, a fixed cylinder 9 fixedly connected to the bottom end of the guide column 8, deformable metal strips 10 fixedly fixedly connected along the circumferential direction on the surface of the fixed cylinder 9, a piston plate 11 movably embedded in the middle of the inside of the anchor head 3, the horizontal plane height of the piston plate 11 being higher than the horizontal plane height of the grout discharge holes 6, the guide column 8 movably penetrating through the middle of the piston plate 11, the edge of the piston plate 11 tightly fitting the inner wall of the anchor head 3, and the bottom of the piston plate 11 fixedly fixed along the circumferential direction. The anchor head 3 is connected to a support diagonal rod 12. The number of deformable metal strips 10 and the support diagonal rods 12 are the same and their positions correspond one-to-one. The end of the deformable metal strip 10 is connected to the support diagonal rod 12. The bottom edge of the support diagonal rod 12 is flush with the surface of the anchor head 3. The use of the deformable metal strip 10 supports the piston plate 11 and the support diagonal rod 12, keeping their positions unchanged. Therefore, when the anchor head 3 is inserted into the wall of the tunnel construction, the support diagonal rod 12 will not get stuck. At the same time, the guide column 8 guides the piston plate 11. When the piston plate 11 is impacted by the injected concrete slurry, it slides along the guide column 8. The deformable metal strip 10 will bend and deform under force, allowing the support diagonal rod 12 to slide and insert its end into the wall. This improves the stability of the anchor head 3, preventing the anchor from easily falling off during installation and preventing the anchor from shaking and becoming unstable due to the impact of the injected slurry.

[0025] A sealing plug 13 is installed on the top of the rod body 1. An operating bar 14 is fixedly connected to the top of the sealing plug 13. A sealing sleeve 15 is installed on the surface of the top of the rod body 1. The bottom of the sealing plug 13 is embedded in the grouting through hole 2. The sealing sleeve 15 and the rod body 1 are connected by threads. The sealing sleeve 15 is tightly attached to the top of the operating bar 14. By using the sealing plug 13, it is convenient to block the grouting through hole 2 at the end of the anchor rod, preventing grout from flowing out during the cooling and solidification process. At the same time, the sealing sleeve 15 can be used to lock and fix the sealing plug 13, making the installation and embedding of the sealing plug 13 simpler, improving the sealing performance, and the sealing plug 13 will not easily fall off, making the operation more convenient.

[0026] A movable sleeve 16 is fixedly connected to the bottom end of the pad 4. Positioning strips 17 are fixedly connected at equal intervals along the circumferential direction on the surface of the movable sleeve 16. The movable sleeve 16 is movably sleeved on the outside of the rod body 1. The positioning strips 17 are made of corrosion-resistant rubber and have an arc-shaped surface. Through the cooperation of the movable sleeve 16 and the positioning strips 17, the rod body 1 is positioned. The positioning strips 17 fit against the inner wall of the hole where the anchor rod is installed, so that the rod body 1 does not contact the inner wall of the hole. As a result, the rod body 1 is located in the center of the hole, and the injected grout is more evenly distributed. This prevents the rod body 1 from tilting so that one side does not adhere to the grout, which would result in the anchor rod not being firmly fixed.

[0027] The working principle and usage process of this utility model are as follows: First, the workers open anchor bolt installation holes at predetermined positions on the inner wall of the tunnel. Holding the rod body 1, they insert the anchor head 3 into the inside of the anchor bolt installation hole until the anchor head 3 reaches the innermost end of the installation hole. The supporting inclined rod 12 is in contact with the soil at the innermost end of the installation hole, and the pad 4 is in contact with the surface of the inner wall of the tunnel. At this time, the movable sleeve 16 and the positioning strip 17 enter the inside of the anchor bolt installation hole. The surface of the positioning strip 17 is arc-shaped and is in contact with the inner wall of the installation hole, so that the surface of the rod body 1 and the inner wall of the installation hole maintain a certain distance. The positioning strip 17 plays a certain supporting and positioning role for the rod body 1.

[0028] The worker takes the pipe connected to the grouting machine and aligns it with the grouting through hole 2. The grout flows outward along the grouting through hole 2 and directly impacts the piston plate 11, pushing it to slide inward along the guide column 8. The deformable metal strip 10 provides support for it. When placing the anchor rod, the positions of the piston plate 11 and the support rod 12 remain unchanged. Under this impact thrust, the deformable metal strip 10 will be pushed to deform and bend, allowing the piston plate 11 and the support rod 12 to slide smoothly. The support rod 12 will gradually insert into the soil inside the installation hole, providing a stabilizing effect for the entire anchor rod. As the piston plate 11 continues to slide, the grout discharge hole 6 will be exposed, and the grout will flow outward through the grout discharge hole 6, filling the gap between the anchor rod installation hole and the anchor rod.

[0029] Continue injecting grout until it seeps outward from the joint between the pad 4 and the tunnel wall, indicating that the grout is full. Stop injecting grout and tighten the locking nut 5 to make the pad 4 fit more tightly against the tunnel, preventing further grout leakage. Use the operating bar 14 to take the sealing plug 13 and insert one end into the grouting hole 2 to seal it. Then take the sealing sleeve 15 and rotate it to install it on the end of the rod 1, so that it wraps around the outside of the sealing plug 13. As the sealing sleeve 15 continues to rotate, it will press tightly against the top of the operating bar 14, pushing the sealing plug 13 inward to make the installation of the sealing plug 13 more stable.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tunnel concrete sidewall anchor bolt, comprising a bolt body (1), characterized in that: The rod (1) has a grouting through hole (2) in the middle. The bottom end of the rod (1) is fixedly connected to an anchor head (3). A pad (4) is sleeved on the surface of the rod (1). A locking nut (5) is installed on the top of the pad (4). A grout discharge hole (6) is equidistantly opened on the surface of the middle part of the anchor head (3) along the circumferential direction. A connecting rod (7) is fixedly installed on the top inside the anchor head (3). A guide column (8) is fixedly installed on the middle part of the bottom end of the connecting rod (7). A fixed cylinder (9) is fixedly connected to the bottom end of the guide column (8). Deformable metal strips (10) are fixedly connected on the surface of the fixed cylinder (9) along the circumferential direction. A piston plate (11) is movably embedded in the middle part of the inside of the anchor head (3). A support diagonal rod (12) is fixedly connected on the bottom of the piston plate (11) along the circumferential direction. A sealing plug (13) is installed on the top of the rod (1), and an operating bar (14) is fixedly connected to the top of the sealing plug (13). A sealing sleeve (15) is installed on the surface of the top of the rod (1).

2. The tunnel concrete sidewall anchor bolt according to claim 1, characterized in that, The horizontal plane of the piston plate (11) is higher than the horizontal plane of the slurry discharge hole (6). The guide column (8) moves through the middle of the piston plate (11). The edge of the piston plate (11) is tightly fitted to the inner wall of the anchor head (3).

3. The tunnel concrete sidewall anchor bolt according to claim 1, characterized in that, The deformable metal strips (10) and the supporting diagonal rods (12) are the same in number and their positions correspond one to one. The ends of the deformable metal strips (10) are connected to the supporting diagonal rods (12), and the bottom edge of the supporting diagonal rods (12) is flush with the surface of the anchor head (3).

4. A tunnel concrete sidewall anchor bolt according to claim 1, characterized in that, The bottom of the sealing plug (13) is embedded inside the grouting through hole (2), and the sealing sleeve (15) and the rod body (1) are connected by threads. The sealing sleeve (15) is tightly attached to the top of the operating bar (14).

5. A tunnel concrete sidewall anchor bolt according to claim 1, characterized in that, The bottom end of the pad (4) is fixedly connected to a movable sleeve (16), and the surface of the movable sleeve (16) is fixedly connected with positioning strips (17) at equal intervals along the circumferential direction.

6. A tunnel concrete sidewall anchor bolt according to claim 5, characterized in that, The movable sleeve (16) is movably sleeved on the outside of the rod (1), and the positioning strip (17) is made of corrosion-resistant rubber with an arc-shaped surface.

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