A reinforcing device for inhibiting deformation of roadway surrounding rock

Abstract

The utility model provides a kind of reinforcing device for inhibiting roadway surrounding rock deformation, including outer tube, anchor rod and sealing sleeve, anchor rod is stretched to the bottom of anchor hole after passing through outer tube, anchor rod is connected with corresponding anchor mechanism after being stretched out of outer tube;Sealing sleeve is spherical body that is sleeved in the outside of anchor rod, and sealing sleeve is in contact with the end portion of outer tube after entering center hole by tightening nut, and is extruded the inner wall of center hole by deformation;The part of tray corresponding to the inside of sealing cover is provided with grout passing hole, and grout outlet corresponding to grout passing hole is arranged in the middle of sealing cover.The present application is suitable for surrounding rock stability control in underground engineering such as mine roadway, tunnel, realizes surrounding rock deformation inhibition and structure reinforcement by mechanical anchoring and grouting reinforcement synergistic effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of roadway surrounding rock support, specifically relating to a reinforcement device for suppressing deformation of roadway surrounding rock. Background Technology

[0002] During tunnel excavation, the surrounding rock is prone to deformation, cracking, or even collapse due to stress release and geological disturbance. To prevent the surrounding rock from deforming and becoming unstable, thus endangering production safety, it is necessary to reinforce the surrounding rock. Among these measures, rock bolt support is a major form of support. Its core function is to provide stability and support through the interaction between the bolt and the rock and soil. It uses the tension of the rock bolt to overcome the low tensile strength of the rock and soil, restricts the rock and soil from detaching from the original body, increases its cohesion, and thus improves the bearing capacity of the surrounding rock. Existing rock bolts mainly rely on the friction between the bolt and the rock mass to provide tension, and are prone to failure in fractured surrounding rock due to the detachment of the anchoring agent.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a reinforcement device for suppressing deformation of the surrounding rock in roadways.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A reinforcement device for suppressing deformation of surrounding rock in roadways includes an outer tube, an anchor bolt, and a sealing sleeve. The anchor bolt is sleeved inside the outer tube. A tray is provided at one end of the outer tube corresponding to the anchor hole opening. A sealing cover is provided on the side of the tray near the opening. A central hole corresponding to the anchor bolt is provided in the center of the sealing cover.

[0007] The anchor rod passes through the outer tube and extends to the bottom of the anchor hole. An anchoring mechanism is connected to the anchor rod after it extends out of the outer tube.

[0008] The sealing sleeve is a spherical body that fits over the outside of the anchor rod. The end of the anchor rod that is placed outside the anchor hole is provided with a nut. Tightening the nut causes the sealing sleeve to enter the central hole and abut against the end of the outer tube, and squeezes the inner wall of the central hole through deformation.

[0009] The anchor rod is a hollow structure so that grouting can be performed on the anchor hole after connecting to the grouting pump;

[0010] The tray has a slurry passage hole corresponding to the inner side of the sealing cover, and a slurry outlet corresponding to the slurry passage hole is provided in the middle of the sealing cover.

[0011] Preferably, both the outer tube and the anchor rod have threaded protrusions on their outer walls.

[0012] Preferably, the outer tube comprises multiple segments, and a connecting pipe is provided between adjacent ends of the outer tube, with multiple limiting posts evenly distributed on the connecting pipe.

[0013] Preferably, the limiting post extends radially toward the anchor rod along the connecting pipe.

[0014] Preferably, the anchoring mechanism includes:

[0015] A kit, which is fitted onto the anchor rod to stop at the end of the outer tube;

[0016] Locking flaps, a plurality of the locking flaps are correspondingly connected to the kit, and protrusions are provided on the outer wall of the locking flaps;

[0017] An extrusion member, which is a conical body fixed to the end of the anchor rod, with the smaller end of the conical body pointing towards the locking flap, so as to drive the locking flap to deform outward and adhere to the inner wall of the anchor hole when it is inserted into the locking flap.

[0018] Preferably, the kit and the locking flap are made of polyethylene or metal and are integrally molded.

[0019] Preferably, the outer wall of the anchor bolt is provided with grouting holes.

[0020] Beneficial effects: This application is applicable to the stability control of surrounding rock in underground engineering such as mine roadways and tunnels. Through the synergistic effect of mechanical anchoring and grouting reinforcement, it can suppress the deformation of surrounding rock and strengthen the structure. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0022] Figure 1 This is a simplified structural diagram of the reinforcement device in a specific embodiment of the present invention;

[0023] Figure 2 This is a simplified cross-sectional view of the reinforcement device in the assembled state in a specific embodiment of the present invention;

[0024] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0025] In the diagram: 1. Outer pipe; 2. Tray; 3. Anchor bolt; 4. Locking flap; 5. Conical body; 6. Connecting pipe; 7. Limiting post; 8. Sealing sleeve; 9. Grout outlet; 10. Sealing cover; 11. Nut; 12. Grouting hole; 13. Grout passage hole; 14. Sealing gasket; 15. Kit. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0027] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0029] like Figure 1-3 As shown, A reinforcement device for suppressing deformation of surrounding rock in roadways includes an outer pipe 1, an anchor rod 3, and a sealing sleeve 8. The anchor rod 3 is sleeved inside the outer pipe 1, and there is a certain gap between the anchor rod 3 and the outer pipe 1, so that there is space for grout pouring between them, thereby ensuring that they have sufficient mutual restraint after grout pouring. A tray 2 is provided at one end of the outer pipe 1 corresponding to the opening of the anchor hole. The tray 2 is a metal disc. Multiple grout passage holes 13 are provided on the outside of the outer pipe 1 corresponding to the tray 2. A sealing cover 10 is provided on the side of the tray 2 near the opening. The sealing cover 10 can be a hemispherical or frustum-shaped groove. The sealing cover 10 is fixed to the tray 2 by welding. The center of the sealing cover 10 is provided with a central hole corresponding to the anchor rod 3, so that the anchor rod 3 can pass through. After passing through the outer pipe 1, the anchor rod 3 extends to the bottom of the anchor hole. After the anchor rod 3 extends out of the outer pipe 1, it is connected to an anchoring mechanism. The anchoring mechanism can mechanically anchor the anchor hole, thereby using the synergistic effect of mechanical anchoring and grouting reinforcement to suppress deformation of the surrounding rock in the roadway and strengthen the structure.

[0030] The sealing sleeve 8 is a spherical body that fits over the outside of the anchor rod 3. It has a through hole in the center corresponding to the anchor rod 3. The sealing sleeve 8 is made of rubber. A nut 11 is provided at the end of the anchor rod 3 that is outside the anchor hole. The nut 11 is threaded onto the anchor hole. By tightening the nut 11, the anchoring mechanism stops at the end of the outer tube 1 and unfolds to form an anchor. Then, as it continues to rotate, the sealing sleeve 8 enters the central hole and abuts against the end of the outer tube 1. Through deformation, it squeezes the inner wall of the central hole, thereby sealing the gap between the outer tube 1 and the anchor rod 3. The grout is first filled into the outer pipe 1 and the anchor rod 3, and then filled from the front end of the outer pipe 1 to the orifice to ensure the compactness of the grout filling. The anchor rod 3 is a hollow structure with a grouting hole 12 on the side to connect to the grouting pump and then grout the anchor hole through the anchor rod 3. The outer walls of the outer pipe 1 and the anchor rod 3 are provided with threaded protrusions to improve the gripping ability with the concrete after pouring. The part of the tray 2 corresponding to the inner side of the sealing cover 10 is provided with a grout passage hole 13, and the middle of the sealing cover 10 is provided with a grout outlet 9 corresponding to the grout passage hole 13. After being filled between the outer wall of the outer pipe 1 and the anchor hole, the grout flows out from the grout passage hole 13 and the grout outlet 9, so that the grout filling condition can be judged.

[0031] In an optional embodiment, the outer tube 1 includes multiple segments, and a connecting pipe 6 is provided between adjacent ends of the outer tube 1. The segments can be spliced ​​according to the actual anchoring depth required. Multiple limiting posts 7 are evenly distributed on the connecting pipe 6, thereby forming an interlock through the limiting posts 7 to improve the anchoring stability. Furthermore, the limiting posts 7 extend radially towards the anchor rod 3 along the connecting pipe 6, and the limiting posts 7 provide an interlock with the concrete on both sides of the outer tube 1, thereby improving the anchoring stability.

[0032] The anchoring mechanism includes a kit 15 and a locking flap 4. The kit 15 is fitted onto the anchor rod 3 to stop at the end of the outer tube 1. Multiple locking flaps 4 are connected to the kit 15, and protrusions are provided on the outer wall of the locking flaps 4. The pressing element is a cone 5 fixed to the end of the anchor rod 3. The smaller end of the cone 5 points towards the locking flap 4 so that when it is inserted into the locking flap 4, it drives the locking flap 4 to deform outward and stick to the inner wall of the anchor hole.

[0033] In this embodiment, the grouting hole 12 on the anchor rod 3 is only provided at the corresponding joint. A sealing plug is slidably fitted in the inner cavity of the front end of the anchor rod 3. The outer tube 1 is provided with a sliding hole for the sliding assembly of the limiting post 7. The pressure required to drive the sealing plug is greater than the pressure required to drive the limiting post 7 to slide. A sealing gasket 14 is provided between the kit 15 and the outer tube 1. The inner hole of the sealing gasket 14 is interference-fitted with the anchor rod 3, so as to form a sealed cavity inside the outer tube 1. First, the grout enters the outer tube 1 from the grouting hole 12. Then, the grout pressure gradually increases to drive the limiting post 7 to slide outward, thereby abutting against the inner wall of the anchor hole. As the pressure further increases, it pushes the sealing plug to fall off. Grout is injected from the bottom of the hollow structure of the anchor rod 3. Then, the grout fills the anchor hole from the outer tube 1.

[0034] In an alternative embodiment, the kit 15 and the locking flap 4 are made of polyethylene or metal and are integrally molded.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A reinforcement device for inhibiting deformation of a surrounding rock of a roadway, characterized in that, The device includes an outer tube, an anchor bolt, and a sealing sleeve. The anchor bolt is fitted inside the outer tube. A tray is provided at one end of the outer tube corresponding to the anchor hole opening. A sealing cover is provided on the side of the tray near the opening. The sealing cover has a central hole corresponding to the anchor bolt in its center. The anchor rod passes through the outer tube and extends to the bottom of the anchor hole. An anchoring mechanism is connected to the anchor rod after it extends out of the outer tube. The sealing sleeve is a spherical body that fits over the outside of the anchor rod. The end of the anchor rod that is placed outside the anchor hole is provided with a nut. Tightening the nut causes the sealing sleeve to enter the central hole and abut against the end of the outer tube, and squeezes the inner wall of the central hole through deformation. The anchor rod is a hollow structure so that grouting can be performed on the anchor hole after connecting to the grouting pump; The tray has a slurry passage hole corresponding to the inner side of the sealing cover, and a slurry outlet corresponding to the slurry passage hole is provided in the middle of the sealing cover.

2. The reinforcement device for inhibiting deformation of a roadway surrounding rock according to claim 1, characterized in that, Both the outer tube and the anchor rod have threaded protrusions on their outer walls.

3. The reinforcement device for suppressing deformation of surrounding rock in roadways according to claim 1, characterized in that, The outer tube comprises multiple sections, and a connecting pipe is provided between adjacent ends of the outer tube. Multiple limiting posts are evenly distributed on the connecting pipe.

4. The reinforcement device for suppressing deformation of surrounding rock in roadways according to claim 3, characterized in that, The limiting post extends radially toward the anchor rod along the connecting pipe.

5. The reinforcement device for suppressing deformation of surrounding rock in roadways according to claim 1, characterized in that, The anchoring mechanism includes: A kit, which is fitted onto the anchor rod to stop at the end of the outer tube; Locking flaps, a plurality of the locking flaps are correspondingly connected to the kit, and protrusions are provided on the outer wall of the locking flaps; An extrusion member, which is a conical body fixed to the end of the anchor rod, with the smaller end of the conical body pointing towards the locking flap, so as to drive the locking flap to deform outward and adhere to the inner wall of the anchor hole when it is inserted into the locking flap.

6. The reinforcement device for suppressing deformation of surrounding rock in roadways according to claim 5, characterized in that, The kit and the locking flap are made of polyethylene or metal and are integrally molded.

7. The reinforcement device for suppressing deformation of surrounding rock in roadways according to claim 1, characterized in that, The outer wall of the anchor bolt is provided with grouting holes.

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