High-strength expansion anchor rod supporting device for soft rock deformation tunnel

Abstract

The utility model relates to the technical field of tunnel supporting, in particular to a high-strength expansion anchor rod supporting device for a soft rock deformation tunnel. Comprising an outer cylinder and an inner cylinder, the inner cylinder is sleeved with the outer cylinder, an outer grouting hole is formed in the surface of the outer cylinder, a pushing block is arranged at one end of the outer cylinder, a main fixing thorn block is arranged on the surface of the outer cylinder, and the end, close to the pushing block, of the main fixing thorn block is hinged to the outer cylinder through a first hinge shaft; an extrusion block is arranged at the position, corresponding to the main fixing thorn block, of the inner cylinder, a top cone is arranged at the end, away from the pushing block, of the outer cylinder, and a bottom grouting hole is formed in the top cone. Friction force and anchoring force between the anchor rod and surrounding rock are increased, the overall anchoring effect is improved, and the supporting capacity of a tunnel is enhanced. The utility model is mainly applied to the high-strength expansion anchor rod support of the soft rock deformation tunnel.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support, and more specifically to a high-strength expansion anchor support device for soft rock deformation tunnels. Background Art

[0002] Soft rock deformation tunnels are tunnel projects that pass through soft rock formations prone to deformation. Soft rock formations are characterized by low rock strength, susceptibility to water, and prone to deformation. Therefore, soft rock formations often present significant engineering difficulties and safety risks in tunnel construction. Therefore, effective support measures are required to ensure safe tunnel construction. High-strength expansion anchor support devices for soft rock deformation tunnels are a technical device used to support tunnel projects in soft rock formations.

[0003] At present, the existing high-strength expansion anchor support device for soft rock deformation tunnels is prone to breakage and deformation during use due to the low strength of the soft rock. Since the high-strength expansion anchor support device is generally fixed by expansion and extrusion, the soft rock is subject to external influences such as water erosion and dissolution and geological tectonic activities during the use of the high-strength expansion anchor support device, which can easily lead to damage to the soft rock and cause the fixed position of the high-strength expansion anchor support device to shift or even detach and fall. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the present invention provides a high-strength expansion anchor support device for soft rock deformation tunnels. This device improves the overall anchoring effect, enhances the tunnel's support capacity, increases the contact area between the device and the surrounding soft rock, expands the support range, and improves the overall stability of the tunnel.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A high-strength expansion anchor support device for a soft rock deformation tunnel comprises an outer tube and an inner tube, the outer tube being sleeved on the outside of the inner tube, the outer tube surface being provided with an external grouting hole, a pushing block being provided at one end of the outer tube, a main fixed thorn block being provided on the outer tube surface, an end of the main fixed thorn block close to the pushing block being hinged to the outer tube via a first hinge shaft, an internal grouting hole being provided on the inner tube surface, an extrusion block being provided on the inner tube at a position corresponding to the main fixed thorn block, a top cone being provided at the end of the outer tube away from the pushing block, and a bottom grouting hole being provided on the top cone.

[0007] Two groups of main fixing spike blocks are provided on the outer cylinder.

[0008] The inner cylinder is provided with a secondary fixed thorn block, and one end of the secondary fixed thorn block away from the pushing block is hinged to the inner cylinder through a second hinge shaft. The outer cylinder is provided with a limiting groove matched with the position of the secondary fixed thorn block, and the limiting groove is located between the two main fixed thorn blocks.

[0009] An extrusion chute is provided on one side of the limiting groove close to the pushing block, and a side of the auxiliary fixed thorn block close to the pushing block is sloped, and the sloped structure on one side of the auxiliary fixed thorn block is matched with the extrusion chute.

[0010] The extrusion block is in a slope shape, and one end of the main fixing thorn block away from the first hinge axis is matched with the slope of the extrusion block.

[0011] A connecting groove is provided at one end of the outer cylinder away from the pushing block, the connecting groove is connected to a first support rod, the first support rod is connected to a second support rod, the first support rod and the second support rod are both equidistantly distributed in a circular array, the second support rod is connected to a control frame, and the top cone is connected to the control frame.

[0012] A second connecting rod is provided on the side of the first support rod close to the connecting groove, and the first support rod is connected to the connecting groove through the second connecting rod; a first connecting rod is provided on the side of the control frame close to the second connecting rod, and the second support rod is connected to the control frame through the first connecting rod.

[0013] The inner side surface of the control frame is fixedly connected to the inner cylinder.

[0014] The first support rod and the second support rod are connected via a third hinge axis.

[0015] The end of the inner cylinder close to the pushing block is provided with a connecting thread.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By providing a first support rod and a secondary fixed spike block, the entire device is fixed by piercing the soft rock through the protrusion, especially for this type of easily broken soft rock, which is beneficial to increase the friction and anchoring force between the anchor rod and the surrounding rock, improve the overall anchoring effect, enhance the support capacity of the tunnel, increase the contact area between the entire device and the surrounding soft rock, expand the support range, and improve the overall stability of the tunnel. By providing a first support rod and an internal grouting hole, this simple and convenient operation method is adopted, which is beneficial to reduce the difficulty of operation during construction, reduce the possibility of error, and improve work efficiency. The combination of the internal grouting hole and the external grouting hole can be aligned with the external grouting hole after the outer cylinder is pushed, and grouting can be conveniently performed, further fixed, and the stability of the equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a schematic diagram of the outer cylinder in the utility model;

[0020] Figure 3 This is a schematic diagram of the inner cylinder in the utility model;

[0021] Figure 4 This is a schematic diagram of the main fixed thorn block in the utility model;

[0022] Figure 5 This is a schematic diagram of the auxiliary fixed thorn block in the utility model;

[0023] Figure 6 Schematic diagram of the first support block and the second support block;

[0024] In the figure: 1 is the outer cylinder, 2 is the pushing block, 3 is the outer grouting hole, 4 is the main fixed thorn block, 5 is the auxiliary fixed thorn block, 6 is the first support rod, 7 is the second support rod, 8 is the control frame, 9 is the top cone, 10 is the bottom grouting hole, 11 is the inner cylinder, 12 is the connecting thread, 13 is the inner grouting hole, 14 is the extrusion block, 15 is the extrusion inclined groove, 16 is the limiting groove, 17 is the connecting groove, 18 is the first hinge axis, 19 is the second hinge axis, 20 is the first connecting rod, 21 is the second connecting rod, and 22 is the third hinge axis. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] like Figures 1 to 6As shown, a high-strength expansion anchor support device for a soft rock deformation tunnel comprises an outer tube 1 and an inner tube 11. The outer tube 1 is sleeved on the outside of the inner tube 11. An outer grouting hole 3 is provided on the surface of the outer tube 1. A pushing block 2 is provided at one end of the outer tube 1. Main fixed thorn blocks 4 are provided on the surface of the outer tube 1. The main fixed thorn blocks 4 are evenly distributed in a circular array on the outer tube 1. The end of the main fixed thorn block 4 close to the pushing block 2 is hinged to the outer tube 1 through a first hinge shaft 18. An inner grouting hole 13 is provided on the surface of the inner tube 11. An extrusion block 14 is provided on the inner tube 11 at a position corresponding to the main fixed thorn block 4. A top cone 9 is provided on the end of the outer tube 1 away from the pushing block 2. A bottom grouting hole 10 is provided on the top cone 9.

[0028] Preferably, two groups of main fixing spike blocks 4 are provided on the outer cylinder 1 .

[0029] Preferably, the inner cylinder 11 is provided with a secondary fixed thorn block 5, which is evenly distributed in a circular array on the inner cylinder 11. The end of the secondary fixed thorn block 5 away from the pushing block 2 is hinged to the inner cylinder 11 through a second hinge shaft 19, and the outer cylinder 1 is provided with a limiting groove 16 that matches the position of the secondary fixed thorn block 5, and the limiting groove 16 is located between the two main fixed thorn blocks 4.

[0030] Preferably, an extrusion chute 15 is provided on the side of the limiting groove 16 close to the pushing block 2, and the side of the auxiliary fixed thorn block 5 close to the pushing block 2 is sloped, and the sloped structure on one side of the auxiliary fixed thorn block 5 is matched with the extrusion chute 15.

[0031] Preferably, the extrusion block 14 is in a slope shape, and the end of the main fixing thorn block 4 away from the first hinge axis 18 is arranged to match the slope of the extrusion block 14.

[0032] Preferably, a connecting groove 17 is provided at one end of the outer cylinder 1 away from the pushing block 2, the connecting groove 17 is connected to the first support rod 6, the first support rod 6 is connected to the second support rod 7, the first support rod 6 and the second support rod 7 are both equidistantly distributed in a circular array, the second support rod 7 is connected to the control frame 8, and the top cone 9 is connected to the control frame 8.

[0033] Preferably, a second connecting rod 21 is provided on the side of the first support rod 6 close to the connecting groove 17, and the first support rod 6 is connected to the connecting groove 17 through the second connecting rod 21; a first connecting rod 20 is provided on the side of the control frame 8 close to the second connecting rod 21, and the second support rod 7 is connected to the control frame 8 through the first connecting rod 20.

[0034] Preferably, the inner side surface of the control frame 8 is fixedly connected to the inner cylinder 11 .

[0035] Preferably, the first support rod 6 and the second support rod 7 are connected via a third hinge axis 22 .

[0036] Preferably, a connecting thread 12 is provided at the end of the inner cylinder 11 close to the pushing block 2 .

[0037] When external force is applied to the push block 2, the main and secondary fixed spike blocks 4 and 5 extend outwards under the action of the extrusion block 14 and the extrusion chute 15. The first and second support rods 6 and 7 are squeezed and then spread apart, increasing the friction and anchoring force between the anchor rods and the surrounding rock, improving the overall anchoring effect and enhancing the tunnel's support capacity, while not affecting the grouting effect of the outer and inner grouting holes 3 and 13. This increases the contact area between the entire equipment and the surrounding soft rock, improving the overall stability of the tunnel.

[0038] The above only describes in detail the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention, and various changes should be included in the scope of protection of the present invention.

Claims

1. A high-strength expansion anchor support device for soft rock deformation tunnels, characterized by: The utility model comprises an outer tube (1) and an inner tube (11), wherein the outer tube (1) is sleeved on the outside of the inner tube (11), an outer grouting hole (3) is provided on the surface of the outer tube (1), a pushing block (2) is provided at one end of the outer tube (1), a main fixed thorn block (4) is provided on the surface of the outer tube (1), an end of the main fixed thorn block (4) close to the pushing block (2) is hinged to the outer tube (1) through a first hinge shaft (18), an inner grouting hole (13) is provided on the surface of the inner tube (11), an extrusion block (14) is provided on the position of the inner tube (11) corresponding to the main fixed thorn block (4), a top cone (9) is provided on the end of the outer tube (1) away from the pushing block (2), and a bottom grouting hole (10) is provided on the top cone (9).

2. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 1, characterized in that: Two groups of main fixed spike blocks (4) are provided on the outer cylinder (1).

3. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 2, characterized in that: The inner cylinder (11) is provided with a secondary fixed thorn block (5), and one end of the secondary fixed thorn block (5) away from the pushing block (2) is hinged to the inner cylinder (11) through a second hinge shaft (19). The outer cylinder (1) is provided with a limiting groove (16) arranged to match the position of the secondary fixed thorn block (5), and the limiting groove (16) is located between the two main fixed thorn blocks (4).

4. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 3, characterized in that: An extrusion chute (15) is provided on a side of the limiting groove (16) close to the pushing block (2), and a side of the auxiliary fixed thorn block (5) close to the pushing block (2) is in a slope shape, and the slope-shaped structure on one side of the auxiliary fixed thorn block (5) is matched with the extrusion chute (15).

5. The high-strength expansion anchor support device for soft rock deformation tunnel according to claim 1, characterized in that: The extrusion block (14) is in a slope shape, and one end of the main fixed thorn block (4) away from the first hinge axis (18) is arranged to match the slope of the extrusion block (14).

6. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 1, characterized in that: A connecting groove (17) is provided at one end of the outer cylinder (1) away from the pushing block (2), the connecting groove (17) is connected to a first support rod (6), the first support rod (6) is connected to a second support rod (7), the first support rod (6) and the second support rod (7) are both equidistantly distributed in a circular array, the second support rod (7) is connected to a control frame (8), and the top cone (9) is connected to the control frame (8).

7. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 6, characterized in that: A second connecting rod (21) is provided on a side of the first support rod (6) close to the connecting groove (17), and the first support rod (6) is connected to the connecting groove (17) via the second connecting rod (21); a first connecting rod (20) is provided on a side of the control frame (8) close to the second connecting rod (21), and the second support rod (7) is connected to the control frame (8) via the first connecting rod (20).

8. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 7, characterized in that: The inner side surface of the control frame (8) is fixedly connected to the inner cylinder (11).

9. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 6, characterized in that: The first support rod (6) and the second support rod (7) are connected via a third hinge axis (22).

10. The high-strength expansion anchor support device for soft rock deformation tunnels according to claim 1, characterized in that: The end of the inner cylinder (11) close to the push block (2) is provided with a connecting thread (12).

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