A detachable anchor bolt support structure for tunneling.

Abstract

This utility model provides a detachable anchor bolt support structure for tunneling, belonging to the field of anchor bolt support technology. It includes an anchor bolt body with a locking nut threaded onto it, a washer plate positioned below the locking nut, and a hollow interior. An anchor head is threaded to the bottom of the anchor bolt body, and a casting pipe is placed inside the anchor bolt body at the top of the anchor head. A sleeve is slidably inserted through the casting pipe into the inner wall of the anchor bolt body, and a locking nut is threaded to the end of the casting pipe at the top of the sleeve. This utility model allows the sleeve to be removed from the anchor bolt body by forcefully pulling outwards by gripping the handle. Then, by using a wrench or pliers to clamp the casting pipe and repeatedly twist it left and right, the anchor head can be loosened, causing the threaded sleeve to disengage from the threads at the top of the anchor head. The dislodged anchor head is then removed from the anchor bolt body through the threaded sleeve for recycling and reuse of the sleeve, anchor head, and casting pipe. This effectively reduces usage costs and significantly improves performance.

Description

Technical Field

[0001] This utility model provides a detachable anchor bolt support structure for tunneling, belonging to the field of anchor bolt support technology. Background Technology

[0002] Anchor bolt support is a reinforcement and support method used in surface engineering projects such as slopes and deep foundation pits, as well as in underground chamber construction such as tunnels and mining areas. Anchor bolts, made of metal, wood, polymer, or other materials, are driven into pre-drilled holes in the surface rock or the surrounding rock mass. Utilizing the special structure of the head and body of the bolt, and the tail support plate (which may be omitted), or relying on bonding, the bolts combine the surrounding rock with the stable rock mass to create a suspension effect, a composite beam effect, or a reinforcement effect, thus achieving the purpose of support. It has advantages such as low cost, good support effect, simple operation, flexible use, and minimal occupation of construction clearance.

[0003] Existing anchor bolt support structures for tunneling can generally meet normal usage needs. They typically include a hollow metal anchor bolt body, an anchor head installed at one end of the anchor bolt body, a grout stopper fitted onto the anchor bolt body, a washer plate, and a locking nut threaded onto the anchor bolt body to lock the washer plate between the mining roadway wall and the locking nut. In use, the anchor bolt body is inserted into the borehole, and grout is injected through the hollow anchor bolt's interior and through the anchor head's grout hole into the gap between the anchor bolt body and the borehole wall. The grout stopper is installed at the end of the anchor bolt body to prevent grout backflow and ensure the grouting effect.

[0004] Based on the above research and existing technology, it has been found that because the anchor bolts and their ends are inserted into the borehole, and the anchor bolt body and anchor head are all cast into the borehole, they are often impossible to remove, resulting in relatively high usage costs. Therefore, this utility model provides a detachable anchor bolt support structure for tunneling. Utility Model Content

[0005] The technical problem solved by this utility model is that once the anchor bolt body and anchor head are cast into the borehole, they are often impossible to disassemble, resulting in relatively high usage costs.

[0006] To solve the technical problem, the technical solution provided by this utility model is as follows: a detachable tunnel anchor support structure, including an anchor body, a locking nut two threadedly connected to the anchor body, a pad placed below the locking nut two passing through the anchor body, the anchor body being hollow inside, an anchor head threadedly connected to the bottom of the anchor body, and a casting pipe placed inside the anchor body at the top of the anchor head;

[0007] The inner side wall of the anchor bolt body has a sleeve inserted through the casting pipe, and the end of the casting pipe is threadedly connected to a locking nut placed on the top of the sleeve.

[0008] Furthermore, the top of the sleeve is symmetrically provided with lifting handles placed on both sides of the locking nut.

[0009] Furthermore, the outer wall of the sleeve column is provided with several limiting rails around its circumference, and the inner wall of the anchor rod is provided with a limiting groove that matches the limiting rails.

[0010] Furthermore, the bottom of the anchor body is provided with a threaded sleeve, and the upper end of the anchor head is provided with a thread that matches the threaded sleeve.

[0011] Furthermore, the anchor head has an internal hollow structure and is connected to the casting pipe, and the side wall of the anchor head is provided with grout holes that are connected to the casting pipe.

[0012] Furthermore, the pad has a through hole at its center that passes through the anchor rod, and the sleeve has a through hole at its center that passes through the casting pipe.

[0013] The beneficial effects of this utility model are:

[0014] By unscrewing the locking nut from the casting pipe and pulling outwards with the lifting handle, the sleeve can be removed from the anchor body. Then, by using a wrench or pliers to clamp the casting pipe and repeatedly turn it left and right, the anchor head can be loosened, causing the threaded sleeve to disengage from the thread at the top of the anchor head. The dislodged anchor head can then be removed from the anchor body through the threaded sleeve for recycling and reuse of the sleeve, anchor head, and casting pipe. This effectively reduces usage costs and greatly improves performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0017] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0018] Figure 4 This is a partially enlarged view of the present invention.

[0019] 1. Anchor bolt body; 2. Anchor head; 3. Casting pipe; 4. Sleeve; 5. Locking nut one; 6. Locking nut two; 7. Washer plate; 8. Lifting handle; 9. Limiting rail; 10. Limiting groove; 11. Threaded sleeve; 12. Thread; 13. Grouting hole; 14. Perforation. Detailed Implementation

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0021] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0022] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] According to the appendix Figure 1 , 2 As shown: This utility model provides a detachable anchor bolt support structure for tunneling roadways: it includes an anchor bolt body 1, a locking nut 6 threaded onto the anchor bolt body 1, a pad 7 placed below the locking nut 6 on the anchor bolt body 1, a through hole through the center of the pad 7 passing through the anchor bolt body 1 to avoid interference, and a grout stop plug passing through the anchor bolt body below the pad 7 (not shown in the figure). The grout stop plug adopts a known existing structure. Specifically, the anchor bolt body 1 is inserted into the borehole, and the grout stop plug is installed at the end of the anchor bolt body 1 to prevent grout backflow and ensure the grouting effect. By tightening the locking nut 6, the pad 7 is locked and positioned between the mining roadway wall and the locking nut 6.

[0024] As per the instruction manual Figure 1 , 2 As shown in Figure 3: The anchor body 1 is hollow inside. The bottom of the anchor body 1 is threadedly connected to the anchor head 2. The bottom of the anchor body 1 is provided with a threaded sleeve 11. The upper end of the anchor head 2 is provided with a thread 12 that matches the threaded sleeve 11, which is used to install the anchor head 2 at the bottom of the anchor body 1. The top of the anchor head 2 is provided with a pouring pipe 3 placed inside the anchor body 1. The anchor head 2 has a hollow internal structure and is connected to the pouring pipe 3. The side wall of the anchor head 2 is provided with a grout hole 13 that is connected to the pouring pipe 3. Specifically, grouting is performed through the pouring pipe 3 and the anchor head 2 to fill the gap between the anchor body 1 and the borehole wall through the grout hole 13, increasing the friction and adhesion, and significantly improving the anchoring strength.

[0025] As per the instruction manual Figure 1 , 3As shown in Figure 4: A sleeve 4, which passes through the casting pipe 3, is slidably inserted into the inner wall of the anchor body 1. A through hole 14, which passes through the casting pipe 3, is opened in the center of the sleeve 4 to avoid interference. A locking nut 5, which is placed on the top of the sleeve 4, is threaded to the end of the casting pipe 3 to lock the position of the sleeve 4. A lifting handle 8, which is placed on both sides of the locking nut 5, is symmetrically provided on the top of the sleeve 4. Several limiting rails 9 are provided on the circumference of the outer wall of the sleeve 4. A limiting groove 10, which matches the limiting rails 9, is provided on the inner wall of the anchor body 1 to limit the sleeve 4 inside the anchor body 1. Specifically, the locking nut 5 is used to lock the sleeve 4 inside the anchor body 1.

[0026] The principle of this utility model

[0027] During use, the anchor body 1 is inserted into the borehole. Grouting is performed through the pouring pipe 3 and the anchor head 2, filling the gap between the anchor body 1 and the borehole wall through the grout hole 13. A grout stop plug is installed at the end of the anchor body 1 to prevent grout backflow and ensure grouting effect. By tightening the locking nut 2 6, the pad 7 is locked and positioned between the mining roadway wall and the locking nut 2 6. The locking nut 1 5 is used to lock the sleeve 4 inside the anchor body 1. After use, the locking nut 1 5 is unscrewed from the pouring pipe 3, and the lifting handle 8 is held. By pulling outwards with force, the sleeve 4 can be removed from the anchor body 1. Then, by using a wrench or pliers to clamp the pouring pipe 3 and twisting it repeatedly left and right, the anchor head 2 can be loosened due to the limited contact area between the anchor head 2 and the grout filling the borehole. This allows the threaded sleeve 11 to disengage from the thread at the upper end of the anchor head 2. The dislodged anchor head 2 can then be removed from the anchor body 1 through the threaded sleeve 11 for recycling and reuse. The sleeve 4, anchor head 2, and pouring pipe 3 can effectively reduce usage costs and greatly improve performance.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A detachable anchor bolt support structure for tunneling, comprising an anchor bolt body (1), wherein a locking nut (6) is threaded onto the anchor bolt body (1), and a pad (7) is placed below the locking nut (6) on the anchor bolt body (1), characterized in that: The anchor body (1) is hollow inside, and the bottom of the anchor body (1) is threadedly connected to the anchor head (2). The top of the anchor head (2) is provided with a casting pipe (3) placed inside the anchor body (1). The inner wall of the anchor body (1) is slidably inserted with a sleeve (4) that passes through the casting pipe (3), and the end of the casting pipe (3) is threadedly connected with a locking nut (5) placed on the top of the sleeve (4).

2. A demountable heading roadway bolt support structure according to claim 1, characterised in that: The top of the sleeve (4) is symmetrically provided with lifting handles (8) placed on both sides of the locking nut (5).

3. A demountable heading roadway bolt support structure according to claim 1, characterised in that: The outer side wall of the sleeve column (4) is provided with several limiting rails (9), and the inner side wall of the anchor rod body (1) is provided with a limiting groove (10) that matches the limiting rails (9).

4. A demountable heading roadway bolt support structure according to claim 1, characterised in that: The bottom of the anchor body (1) is provided with a threaded sleeve (11), and the upper end of the anchor head (2) is provided with a thread (12) that matches the threaded sleeve (11).

5. A demountable heading roadway bolt support structure according to claim 1 wherein: The anchor head (2) has an internal hollow structure and is connected to the casting pipe (3). The side wall of the anchor head (2) is provided with a grout hole (13) that is connected to the casting pipe (3).

6. A demountable heading roadway bolt support structure according to claim 1 wherein: The pad (7) has a through hole in the center that passes through the anchor rod body (1), and the sleeve column (4) has a through hole (14) in the center that passes through the casting pipe (3).

Images