A tunnel support structure

Abstract

This utility model discloses a tunnel support structure, belonging to the field of tunnel support technology. It includes a support frame, with a concrete layer filling the space between the support frame and the tunnel wall. The support frame comprises multiple arc-shaped top plates connected by bolts, with L-shaped support plates bolted to both ends of each arc-shaped top plate. Multiple anchor bolts fixed to the tunnel are installed on the support plates, and a bottom plate is bolted between two support plates. This utility model, through the support frame and concrete layer, ensures sufficient support strength by using a precast support frame made of steel reinforcement and concrete. The concrete layer fills the gap between the support frame and the tunnel wall, preventing collapse. The support frame is assembled from multiple arc-shaped top plates, support plates, and a bottom plate, facilitating transportation and installation. All arc-shaped top plates, support plates, and bottom plates are precast, ensuring uniform quality and stable structural strength. The anchor bolts further enhance the stability of the support frame.

Description

Technical Field

[0001] This utility model relates to a tunnel support structure and belongs to the field of tunnel support technology. Background Technology

[0002] When deep-buried or open-pit mines are mined to a certain depth, underground mining methods are used. At this time, various passages need to be drilled between the surface and the ore body for ore transportation, ventilation, drainage, pedestrian access, and other necessary preparatory works for metallurgical equipment to extract ore. These passages are collectively called mine roadways. During the excavation of mine roadways, it is necessary to support and protect the roadways to prevent the roof of the roadways from collapsing and causing mining accidents.

[0003] Most existing roadway support structures use steel mesh sprayed concrete structures, which need to be constructed underground, resulting in unstable structural strength and safety risks.

[0004] Therefore, this utility model proposes a new solution. Utility Model Content

[0005] The main purpose of this utility model is to provide a tunnel support structure to overcome the shortcomings of the existing technology.

[0006] The objective of this utility model can be achieved by adopting the following technical solution:

[0007] A roadway support structure includes a support frame, with a concrete layer filling the space between the support frame and the inner wall of the roadway. The support frame includes multiple arc-shaped top plates connected by bolts. Both ends of the multiple arc-shaped top plates are connected by bolts to L-shaped support plates. Multiple anchor rods fixedly connected to the roadway are installed on the support plates. A bottom plate is connected between two support plates by bolts.

[0008] Preferably, grouting grooves are provided on the outer side walls of both the arc-shaped top plate and the support plate, and grouting holes communicating with the grouting grooves are provided on the inner side walls of both the arc-shaped top plate and the support plate.

[0009] Preferably, the grouting hole is an internally threaded hole, a plug is installed on the inner side of the grouting hole, the outer wall of the plug is provided with external threads, and one end of the plug is connected to a hexagonal screw block.

[0010] Preferably, the support plate has anchor holes on its side wall, and a sealing sleeve fitted onto the outer wall of the anchor rod is installed inside the anchor holes.

[0011] Preferably, the arc-shaped top plate has two first mounting holes at both its upper and lower ends, and a first mounting groove communicating with the first mounting holes is provided on the inner sidewall of the arc-shaped top plate. The arc-shaped top plate has two second mounting holes at both its front and rear ends, and a second mounting groove communicating with the second mounting holes is provided on the inner sidewall of the arc-shaped top plate.

[0012] Preferably, the support plate includes a vertical plate and a horizontal plate fixedly connected to the bottom of the vertical plate.

[0013] Preferably, the top of the vertical plate has two third mounting holes, the inner sidewall of the vertical plate has a third mounting groove communicating with the third mounting holes, and both the front and rear ends of the vertical plate have two fourth mounting holes, the inner sidewall of the vertical plate has a fourth mounting groove communicating with the fourth mounting holes.

[0014] Preferably, the side wall of the horizontal plate has two fifth mounting holes, the top of the horizontal plate has a fifth mounting groove communicating with the fifth mounting holes, the two ends of the bottom plate have sixth mounting holes, and the top of the bottom plate has a sixth mounting groove communicating with the sixth mounting holes.

[0015] Preferably, the bottom of the base plate is connected to a plurality of vertically arranged fixing rods.

[0016] Preferably, both the arc-shaped top plate and the supporting plate are concrete slabs, and their inner sides are reinforced with steel bars.

[0017] The beneficial technical effects of this utility model are as follows: According to the tunnel support structure of this utility model:

[0018] 1. By setting up a support frame and a concrete layer, the support frame is made of steel bars and precast concrete, which can ensure sufficient support strength. The concrete layer can fill the gap between the support frame and the inner wall of the roadway, thereby preventing collapse.

[0019] 2. The support frame is spliced ​​together from multiple arc-shaped top plates, support plates and bottom plates, which facilitates transportation and installation. The arc-shaped top plates, support plates and bottom plates are all prefabricated, with uniform quality and stable structural strength.

[0020] 3. The stability of the support frame can be improved by setting anchor bolts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure according to a preferred embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of a support frame structure according to a preferred embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of an arc-shaped top structure according to a preferred embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of an arc-shaped top structure according to a preferred embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a support plate structure according to a preferred embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a support plate structure according to a preferred embodiment of the present invention.

[0027] In the diagram: 1. Support frame; 2. Concrete layer; 3. Arched top plate; 4. Support plate; 5. Anchor bolt; 6. Base plate; 7. Grouting groove; 8. Grouting hole; 9. Plug; 10. Hexagonal screw block; 11. Anchor hole; 12. Sealing sleeve; 301. First mounting hole; 302. First mounting groove; 303. Second mounting hole; 304. Second mounting groove; 401. Vertical plate; 402. Horizontal plate; 403. Third mounting hole; 404. Third mounting groove; 405. Fourth mounting hole; 406. Fourth mounting groove; 407. Fifth mounting hole; 408. Fifth mounting groove; 601. Sixth mounting hole; 602. Sixth mounting groove; 603. Fixing rod. Detailed Implementation

[0028] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0029] like Figures 1-6 As shown, the roadway support structure provided in this embodiment includes a support frame 1, with a concrete layer 2 filling the space between the support frame 1 and the roadway inner wall. The support frame 1 includes multiple arc-shaped top plates 3 connected by bolts. Each end of the multiple arc-shaped top plates 3 is connected by bolts to an L-shaped support plate 4. Multiple anchor bolts 5, fixedly connected to the roadway, are installed on the support plates 4. A bottom plate 6 is bolted between two support plates 4. Through the setup of the support frame 1 and the concrete layer 2, the support frame 1, prefabricated from steel bars and concrete, ensures sufficient support strength. The concrete layer 2 fills the gap between the support frame 1 and the roadway inner wall, thus preventing collapse. The support frame 1 is assembled from multiple arc-shaped top plates 3, support plates 4, and bottom plates 6, facilitating transportation and installation. The arc-shaped top plates 3, support plates 4, and bottom plates 6 are all prefabricated, ensuring uniform quality and stable structural strength. The anchor bolts 5 enhance the stability of the support frame 1.

[0030] In this embodiment, as Figure 2 , Figure 4and Figure 6 As shown, grouting grooves 7 are provided on the outer walls of both the arc-shaped top plate 3 and the support plate 4, and grouting holes 8 communicating with the grouting grooves 7 are provided on the inner walls of both the arc-shaped top plate 3 and the support plate 4. The grouting holes 8 are internally threaded holes, and plugs 9 are installed on the inner side of the grouting holes 8. The outer wall of the plugs 9 is provided with external threads, and one end of the plugs 9 is connected to a hexagonal screw block 10. The grouting grooves 7 serve a storage function, reducing grout flow and improving uniformity. The grouting holes 8 facilitate grouting using a grouting machine. After grouting is completed, the plugs 9 are used to seal the holes and prevent leakage.

[0031] In this embodiment, as Figure 1 , Figure 2 and Figure 5 As shown, anchor holes 11 are provided on the side wall of the support plate 4, and a sealing sleeve 12 is installed inside the anchor hole 11 and fitted onto the outer wall of the anchor rod 5. The sealing sleeve 12 is provided to prevent grout from flowing out from the gap between the anchor hole 11 and the anchor rod 5 during grouting.

[0032] In this embodiment, as Figure 1 , Figure 3 and Figure 5 As shown, the arc-shaped top plate 3 has two first mounting holes 301 at both its upper and lower ends. The inner sidewall of the arc-shaped top plate 3 has a first mounting groove 302 communicating with the first mounting holes 301. The arc-shaped top plate 3 has two second mounting holes 303 at both its front and rear ends. The inner sidewall of the arc-shaped top plate 3 has a second mounting groove 304 communicating with the second mounting holes 303. The support plate 4 includes a vertical plate 401 and a horizontal plate 402 fixedly connected to the bottom of the vertical plate 401. The top of the vertical plate 401 has two third mounting holes 403. The inner sidewall of the vertical plate 401 has a third mounting groove 404 communicating with the third mounting holes 403. The front and rear ends of the vertical plate 401 have two fourth mounting holes 405. The inner sidewall of the vertical plate 401 has a fourth mounting groove 406 communicating with the fourth mounting holes 405. The first mounting slot 302, the second mounting slot 304, the third mounting slot 404, the fourth mounting slot 406, the fifth mounting slot 408 and the sixth mounting slot 602 are designed to facilitate the installation of bolts for connection and fixation.

[0033] In this embodiment, as Figure 1 , Figure 2 and Figure 5As shown, two fifth mounting holes 407 are provided on the side wall of the horizontal plate 402, and a fifth mounting groove 408 communicating with the fifth mounting holes 407 is provided on the top of the horizontal plate 402. Sixth mounting holes 601 are provided at both ends of the base plate 6, and a sixth mounting groove 602 communicating with the sixth mounting holes 601 is provided on the top of the base plate 6. Multiple vertically arranged fixing rods 603 are connected to the bottom of the base plate 6. By connecting multiple vertically arranged fixing rods 603 to the bottom of the base plate 6, the gripping ability can be improved.

[0034] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, both the arc-shaped top plate 3 and the support plate 4 are concrete slabs, and their inner sides are reinforced with steel bars.

[0035] In this embodiment, as Figures 1-6 As shown in the figure, the working process of the tunnel support structure provided in this embodiment is as follows:

[0036] During installation, the support plates 4 on both sides are fixed with anchor bolts 5, the arc-shaped top plate 3 is bolted to the top of the support plate 4, and then the bottom plate 6 is bolted on. Through the setting of the support frame 1 and the concrete layer 2, the support frame 1 is made of steel bars and precast concrete, which can ensure sufficient support strength. The concrete layer 2 can fill the gap between the support frame 1 and the inner wall of the roadway, thereby preventing collapse. The support frame 1 is spliced ​​from multiple arc-shaped top plates 3, support plates 4 and bottom plates 6, which is convenient for transportation and installation. The arc-shaped top plates 3, support plates 4 and bottom plates 6 are all precast plates with uniform quality and stable structural strength. The setting of anchor bolts 5 can improve the stability of the support frame 1.

[0037] The above are merely further embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed by this utility model, based on the technical solution and concept of this utility model, shall fall within the protection scope of this utility model.

Claims

1. A tunnel support structure, characterized in that, The system includes a support frame (1), and a concrete layer (2) is filled between the support frame (1) and the inner wall of the roadway. The support frame (1) includes multiple arc-shaped top plates (3) connected by bolts. Both ends of the multiple arc-shaped top plates (3) are connected by bolts to L-shaped support plates (4). Multiple anchor bolts (5) fixedly connected to the roadway are installed on the support plates (4). A bottom plate (6) is connected between two support plates (4) by bolts.

2. The tunnel support structure according to claim 1, characterized in that, Grouting grooves (7) are provided on the outer side walls of the arc-shaped top plate (3) and the support plate (4), and grouting holes (8) communicating with the grouting grooves (7) are provided on the inner side walls of the arc-shaped top plate (3) and the support plate (4).

3. The tunnel support structure according to claim 2, characterized in that, The grouting hole (8) is an internally threaded hole. A plug (9) is installed on the inner side of the grouting hole (8). The outer wall of the plug (9) is provided with external threads. One end of the plug (9) is connected to a hexagonal screw block (10).

4. The tunnel support structure according to claim 2, characterized in that, An anchor hole (11) is provided on the side wall of the support plate (4), and a sealing sleeve (12) is installed on the inner side of the anchor hole (11) and sleeved on the outer wall of the anchor rod (5).

5. The tunnel support structure according to claim 1, characterized in that, The arc-shaped top plate (3) has two first mounting holes (301) at both the top and bottom ends. The inner sidewall of the arc-shaped top plate (3) has a first mounting groove (302) that communicates with the first mounting holes (301). The arc-shaped top plate (3) has two second mounting holes (303) at both the front and rear ends. The inner sidewall of the arc-shaped top plate (3) has a second mounting groove (304) that communicates with the second mounting holes (303).

6. The tunnel support structure according to claim 1, characterized in that, The support plate (4) includes a vertical plate (401) and a horizontal plate (402) fixedly connected to the bottom of the vertical plate (401).

7. A tunnel support structure according to claim 6, characterized in that, The top of the vertical plate (401) has two third mounting holes (403), and the inner sidewall of the vertical plate (401) has a third mounting groove (404) communicating with the third mounting holes (403). The front and rear ends of the vertical plate (401) each have two fourth mounting holes (405), and the inner sidewall of the vertical plate (401) has a fourth mounting groove (406) communicating with the fourth mounting holes (405).

8. A tunnel support structure according to claim 6, characterized in that, The horizontal plate (402) has two fifth mounting holes (407) on its side wall. The top of the horizontal plate (402) has a fifth mounting groove (408) that communicates with the fifth mounting holes (407). The bottom plate (6) has a sixth mounting hole (601) at both ends. The top of the bottom plate (6) has a sixth mounting groove (602) that communicates with the sixth mounting hole (601).

9. A tunnel support structure according to claim 1, characterized in that, The bottom of the base plate (6) is connected to a plurality of vertically arranged fixing rods (603).

10. A tunnel support structure according to claim 1, characterized in that, Both the arc-shaped top plate (3) and the support plate (4) are concrete slabs, and their inner sides are reinforced with steel bars.

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