A device for supporting a tunnel portal

Abstract

This invention provides a slanted portal support device, comprising a support device body, which includes a main beam assembly, a connecting assembly, an auxiliary beam, and an anchoring mechanism. The main beam assembly has an overall arc-shaped structure, and each main beam assembly is installed on the inner side of the tunnel body. A tunnel portal is provided at the front end of the tunnel body, and the front end of the tunnel portal has a slanted surface. The sides of the main beam assembly are connected and fixed by the connecting assembly. An auxiliary beam is built at the front end of the connecting assembly. This slanted portal support device avoids damage to the inner wall of the tunnel by setting the anchoring mechanism at the bottom end of each main beam assembly and embedding it into the bottom of the base. Subsequent support removal does not require repair of the inner wall, simplifying the construction process. The auxiliary beam structure at the end provides independent support for the protruding slanted portal, reducing material usage and lowering construction costs.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a slanted portal support device. Background Technology

[0002] The slanted portal, resembling an outward-curving brim of a hat, boasts a naturally curved edge, resulting in an aesthetically pleasing appearance. It also offers excellent aerodynamics and effective protection against falling rocks. Construction of slanted portals requires the pre-installation of support structures at the portal and its inner extension. These supports enhance the overall strength of the portal and prevent material from falling from the top. This process typically involves constructing supports and setting anchor points. Current technology often involves multiple anchor points on the inner wall of the portal during support construction. Therefore, subsequent dismantling of the support requires repairing these anchor points, increasing the workload. Furthermore, existing support structures require additional anchor points when extending to specific areas, resulting in limited flexibility, particularly unsuitable for protruding slanted portals. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a slanted tunnel portal support device to solve the problems mentioned in the background technology. This invention does not require anchoring points on the inner wall of the tunnel, is simple and efficient to build, has strong stability, and has a wide range of applications.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a slanted tunnel portal support device, comprising a support device body, the support device body including a main beam assembly, a connecting assembly, an auxiliary beam, and an anchoring mechanism. The main beam assembly has an overall arc-shaped structure, and each main beam assembly is installed on the inner side of the tunnel body. A tunnel portal is provided at the front end of the tunnel body, and the front end of the tunnel portal has a slanted surface. The sides of the main beam assembly are connected and fixed by the connecting assembly. An auxiliary beam is erected at the front end of the connecting assembly and is installed at the top position inside the tunnel portal. A base is provided at the bottom end of the tunnel body. An anchoring mechanism is installed at the bottom end of each main beam assembly, and an anchor rod is provided at the bottom end of the anchoring mechanism, with each anchor rod embedded inside the base.

[0005] Furthermore, the main beam assembly includes an outer steel frame and an inner steel frame. The surface of the outer steel frame is under pressure with the inner wall of the tunnel body. The inner steel frame is welded to the middle position of the outer steel frame. The surface of the inner steel frame is provided with a plug-in hole, and the main beam assembly is connected to the connecting assembly through the plug-in hole.

[0006] Furthermore, the outer steel frame is connected to a metal mesh on its sides, the metal mesh is laid between each main beam assembly, and the outer side of the metal mesh is in contact with and adheres to the inner wall of the tunnel body.

[0007] Furthermore, the outer and inner steel frames have a "T" shaped cross-section, and multiple main beam assemblies are provided, with the same spacing between each main beam assembly.

[0008] Furthermore, the connecting assembly includes a connecting rod and an auxiliary beam. The connecting rod passes through the interior of the insertion hole, and a first threaded hole is formed on the surface of the connecting rod. A second threaded hole is formed on the surface of the auxiliary beam.

[0009] Furthermore, the auxiliary beam is fixed to the connecting rod as a whole by using bolts to pass through the first threaded hole and the second threaded hole in sequence, and the outer side of the auxiliary beam is in contact with the inner side of the tunnel portal.

[0010] Furthermore, the anchoring mechanism includes a first anchoring plate and a second anchoring plate. The bottom of the first anchoring plate is provided with a thickened layer, and the top of the thickened layer is provided with a mating top plate. The bottom side of the mating top plate is provided with a notch, and the surface of the mating top plate is provided with a top through hole.

[0011] Furthermore, a positioning plug-in plate is provided at the middle position of the bottom end of both the first anchor plate and the second anchor plate, and each anchoring mechanism is embedded in the surface of the base through the positioning plug-in plate, with the side of the anchoring mechanism in contact with the side wall of the tunnel body.

[0012] Furthermore, the surface of the second anchor plate is provided with a bottom plate, and the surface of the bottom plate is provided with a bottom through hole.

[0013] Furthermore, the bottom plate is embedded inside the notch, and the top plate and the bottom plate are fixed together by interlocking anchor rods. The bottom end of the anchor rod is provided with an anchor head, and the top end of the anchor rod is provided with a pad. The anchor rod passes through the top through hole and the bottom through hole in sequence, and the pad is pressed against the surface of the top plate.

[0014] The beneficial effects of the present invention: The present invention provides a sloping tunnel portal support device, comprising a support device body, the support device body comprising a tunnel body, a tunnel portal, a sloping surface, a main beam assembly, a connecting assembly, an anchoring mechanism, a base, an outer steel frame, an inner steel frame, a plug-in hole, a metal mesh, a connecting rod, a first threaded hole, an auxiliary beam, a second threaded hole, a first anchoring plate, a second anchoring plate, a connecting top plate, a thickened layer, a positioning plug-in plate, a top through hole, a connecting bottom plate, a bottom through hole, an anchor rod, an anchor head, a notch, and a pad.

[0015] 1. This inclined portal support device avoids damage to the tunnel wall by setting the anchoring mechanism at the bottom of each main beam assembly and embedding it into the bottom of the foundation. The internal wall does not need to be repaired when the support is removed, which simplifies the construction process.

[0016] 2. This oblique-cut portal support device uses an arc-shaped main beam assembly and connects it with multiple connecting components. The bottom anchoring mechanism is also fixed by inserting two different anchor plates, thereby connecting and fixing the main beam assembly from multiple positions, which improves the overall integrity.

[0017] 3. The oblique-cut portal support device uses multiple connecting rods at the top and an auxiliary beam structure at the end to independently support the forward-protruding oblique-cut portal. This part of the support structure is supported by the main beam assembly at the rear end, thus reducing material usage and lowering construction costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the oblique-cut tunnel portal support device of the present invention at the tunnel portal.

[0019] Figure 2 This is a side sectional view of the tunnel portal of a beveled tunnel portal support device according to the present invention;

[0020] Figure 3 This is a front view of a beveled portal support device according to the present invention;

[0021] Figure 4 This is a structural schematic diagram of the main beam assembly of a slanted tunnel portal support device according to the present invention;

[0022] Figure 5 This is a schematic diagram of the anchoring mechanism of a slanted tunnel portal support device according to the present invention;

[0023] In the diagram: 1. Tunnel main body; 2. Tunnel portal; 3. Inclined section; 4. Main beam assembly; 5. Connecting assembly; 6. Anchoring mechanism; 7. Base; 8. Outer steel frame; 9. Inner steel frame; 10. Insertion hole; 11. Metal mesh; 12. Connecting rod; 13. First threaded hole; 14. Auxiliary beam; 15. Second threaded hole; 16. First anchor plate; 17. Second anchor plate; 18. Top plate; 19. Thickened layer; 20. Positioning insertion plate; 21. Top through hole; 22. Bottom plate; 23. Bottom through hole; 24. Anchor rod; 25. Anchor head; 26. Notch; 27. Pad plate. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] Please see Figures 1 to 5 This invention provides a technical solution: a slanted tunnel portal support device, comprising a support device body, the support device body including a main beam assembly 4, a connecting assembly 5, an auxiliary beam 14, and an anchoring mechanism 6. The main beam assembly 4 has an overall arc-shaped structure, and each main beam assembly 4 is installed on the inner side of the tunnel body 1. A tunnel portal 2 is provided at the front end of the tunnel body 1, and the front end of the tunnel portal 2 is provided with a slanted surface 3. The sides of the main beam assembly 4 are connected and fixed by the connecting assembly 5. An auxiliary beam 14 is erected at the front end of the connecting assembly 5, and the auxiliary beam 14 is installed at the top position inside the tunnel portal 2. The bottom of the tunnel body 1 is provided with a base 7. The bottom of each main beam assembly 4 is equipped with an anchoring mechanism 6. The bottom of the anchoring mechanism 6 is provided with an anchor rod 24, and each anchor rod 24 is embedded in the interior of the base 7. This oblique-cut portal support device mainly uses the inner main beam assembly 4 as the main support mechanism. Each main beam assembly 4 is fixed to the base 7 at the bottom of the tunnel body 1 by the anchoring mechanisms 6 on both sides of the bottom. Then, a connecting assembly 5 is built on the main beam assembly 4, and an auxiliary beam 14 is set at the front end along the connecting assembly 5. The top of the tunnel portal 2 is supported by the auxiliary beam 14, thereby completing the comprehensive support construction process.

[0026] In this embodiment, the main beam assembly 4 includes an outer steel frame 8 and an inner steel frame 9. The surface of the outer steel frame 8 is pressurized against the inner wall of the tunnel body 1. The inner steel frame 9 is welded to the middle of the outer steel frame 8. An insertion hole 10 is provided on the surface of the inner steel frame 9, through which the main beam assembly 4 connects to the connecting assembly 5. A metal mesh 11 is connected to the side of the outer steel frame 8. The metal mesh 11 is laid between each main beam assembly 4, and its outer side is in contact with and adheres to the inner wall of the tunnel body 1. The cross-sections of the outer steel frame 8 and the inner steel frame 9 are T-shaped. Multiple main beam components 4 are provided, and the spacing between each main beam component 4 is the same. The main beam components 4 are arc-shaped and connected by multiple connecting components 5. The bottom anchoring mechanism 6 is also fixed by inserting two different anchoring plates, thereby connecting and fixing the main beam components 4 from multiple positions, which improves the overall integrity. During installation, the main beam components 4 need to be manufactured according to the specific scale of the tunnel body 1. The outer steel frame 8 and the inner steel frame 9 are both integrated structures. During installation, the support is transported laterally to the inside of the tunnel body 1 and the subsequent assembly process is carried out. Finally, the outer steel frame 8 can provide support to the inner wall of the tunnel body 1.

[0027] In this embodiment, the connecting assembly 5 includes a connecting rod 12 and an auxiliary beam 14. The connecting rod 12 passes through the inside of the insertion hole 10, and a first threaded hole 13 is formed on the surface of the connecting rod 12. A second threaded hole 15 is formed on the surface of the auxiliary beam 14. The auxiliary beam 14 is partially fixed to the connecting rod 12 as a whole by using bolts that pass through the first threaded hole 13 and the second threaded hole 15 in sequence. The outer side of the auxiliary beam 14 is close to the inner side of the tunnel portal 2. With the help of multiple connecting rods 12 at the top and the auxiliary beam 14 at the end, the front-protruding oblique-cut portal is independently supported. The support structure of this part is supported by the main beam assembly 4 at the rear end, thus reducing material usage and lowering the construction cost. After the main beam assembly 4 is installed, it is used... Multiple connecting rods 12 are laid along the arc top of the tunnel body 1 by passing through the insertion holes 10 on each inner steel frame 9. The inner wall of the tunnel body 1 is covered by a metal mesh 11 on the side of the outer steel frame 8. The metal mesh 11 reinforces the building materials at the top, and the multiple connecting rods 12 also provide some support for the metal mesh 11. When large building materials at the top detach, the connecting rods 12 can also provide additional support and protection. After the connecting rods 12 are installed, the auxiliary beams 14 at the ends can be installed on the connecting rods 12. The length of the connecting rods 12 is set according to the specific shape of the inclined plane so that the ends of the connecting rods 12 do not protrude from the tunnel portal 2.

[0028] In this embodiment, the anchoring mechanism 6 includes a first anchoring plate 16 and a second anchoring plate 17. The bottom of the first anchoring plate 16 is provided with a thickened layer 19, and the top of the thickened layer 19 is provided with a mating top plate 18. The bottom side of the mating top plate 18 is provided with a notch 26, and the surface of the mating top plate 18 is provided with a top through hole 21. The bottom middle position of the first anchoring plate 16 and the second anchoring plate 17 is provided with a positioning plug plate 20, and each anchoring mechanism 6 is embedded in the surface of the base 7 through the positioning plug plate 20. The side of the anchoring mechanism 6 is in contact with the side wall of the tunnel body 1. Specifically, during installation, a corresponding groove structure is first opened on the base 7, and the positioning plug plate 20 at the bottom of the first anchoring plate 16 is inserted into the inside of the groove. Then, the mating bottom plate 22 of the second anchoring plate 17 is embedded into the notch 26. After the top through hole 21 is aligned with the bottom through hole 23, the subsequent anchor rod 24 installation process can be carried out.

[0029] In this embodiment, a bottom plate 22 is provided on the surface of the second anchoring plate 17. A bottom through hole 23 is formed on the surface of the bottom plate 22. The bottom plate 22 is embedded into the notch 26. The top plate 18 and the bottom plate 22 are fixed together by an anchor rod 24. An anchor head 25 is provided at the bottom end of the anchor rod 24, and a pad 27 is provided at the top end of the anchor rod 24. The anchor rod 24 passes through the top through hole 21 and the bottom through hole 23 in sequence, and the pad 27 is pressed against the surface of the top plate 18. This anchoring process... Mechanism 6 is located at the bottom of each main beam assembly 4 and embedded in the bottom of the base 7, thereby achieving the anchoring effect of the entire support device, providing an effective anchoring effect, and avoiding damage to the tunnel inner wall. When the support is removed later, there is no need to repair the inner wall, which simplifies the construction process. After the bottom anchor head 25 passes through the top through hole 21 and the bottom through hole 23, it is drilled into the bottom of the base 7. The pad plate 27 is pressed on the top of the joint, and the two anchoring mechanisms 6 are reinforced at the same time, thus completing the anchoring process of the main beam assembly 4.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for supporting a tunnel portal, the device comprising a device body, wherein: The supporting device body comprises a main beam assembly (4), a connecting assembly (5), an auxiliary beam (14) and an anchoring mechanism (6), the main beam assembly (4) is in an overall arc structure, each main beam assembly (4) is installed on the inner side of the tunnel body (1), the front end of the tunnel body (1) is provided with a tunnel portal (2), the front end of the tunnel portal (2) is provided with a bevel (3), the side edges of the main beam assembly (4) are butt-jointed and fixed through the connecting assembly (5), the front end of the connecting assembly (5) is provided with an auxiliary beam (14), the auxiliary beam (14) is installed at the top position of the inner side of the tunnel portal (2), the bottom end of the tunnel body (1) is provided with a base (7), the bottom end of the main beam assembly (4) is provided with an anchoring mechanism (6), the bottom end of the anchoring mechanism (6) is provided with an anchor rod (24), and each anchor rod (24) is embedded into the inside of the base (7); The connecting assembly (5) comprises a connecting rod (12) and an auxiliary beam (14), the connecting rod (12) passes through the inside of the plug-in hole (10), the surface of the connecting rod (12) is provided with a first threaded hole (13), and the surface of the auxiliary beam (14) is provided with a second threaded hole (15); The auxiliary beam (14) is fixed as a whole with the connecting rod (12) by sequentially passing through the first threaded hole (13) and the second threaded hole (15) through the use of bolts, and the outer side of the auxiliary beam (14) is attached to the inner side of the tunnel portal (2); The anchoring mechanism (6) comprises a first anchoring plate (16) and a second anchoring plate (17), the bottom of the first anchoring plate (16) is provided with a thickened layer (19), the top end of the thickened layer (19) is provided with a butt-joint top plate (18), the bottom side of the butt-joint top plate (18) is provided with a notch (26), and the surface of the butt-joint top plate (18) is provided with a top through hole (21); The bottom end of the first anchoring plate (16) and the second anchoring plate (17) is provided with a positioning plug-in plate (20) at the middle position, and each anchoring mechanism (6) is embedded on the surface of the base (7) through the positioning plug-in plate (20), and the side edge of the anchoring mechanism (6) is in contact with the side wall part inside the tunnel body (1); The surface of the second anchoring plate (17) is provided with a butt-joint bottom plate (22), and the surface of the butt-joint bottom plate (22) is provided with a bottom through hole (23); The butt-joint bottom plate (22) is embedded into the inside of the notch (26), the butt-joint top plate (18) and the butt-joint bottom plate (22) are fixed by penetrating through the use of the anchor rod (24), the bottom end of the anchor rod (24) is provided with an anchor head (25), the top end of the anchor rod (24) is provided with a pad (27), the anchor rod (24) sequentially passes through the top through hole (21) and the bottom through hole (23), and the pad (27) is pressed on the surface of the butt-joint top plate (18).

2. A device as claimed in claim 1, wherein: The main beam assembly (4) comprises an outer steel frame (8) and an inner steel frame (9), the surface of the outer steel frame (8) is pressed against the inner wall of the tunnel body (1), the inner steel frame (9) is welded at the middle position of the outer steel frame (8), the surface of the inner steel frame (9) is provided with a plug-in hole (10), and the main beam assembly (4) is connected with the connecting assembly (5) through the plug-in hole (10).

3. A device as claimed in claim 2, wherein: The side of the outer steel frame (8) is connected with a metal net (11), the metal net (11) is laid between each main beam assembly (4), and the outer side of the metal net (11) is in contact with the inner wall of the tunnel body (1).

4. A device as claimed in claim 3, wherein: The cross section of the outer steel frame (8) and the inner steel frame (9) is a "T" type structure, the main beam assembly (4) is provided with a plurality of main beam assemblies (4), and the interval between each main beam assembly (4) is the same.

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