Fabricated vault structure applied to large-span tunnel

Abstract

The utility model relates to the technical field of vault structures, and discloses an assembly type vault structure applied to a large-span tunnel, which comprises a supporting arc plate, symmetrically arranged supporting legs are arranged below the supporting arc plate, and a plurality of supporting assemblies are arranged between the supporting legs on the two sides. The supporting assemblies are mutually spliced to form an arc-shaped structure matched with the supporting arc plate so as to support the supporting arc plate. The supporting assembly comprises symmetrically-arranged I-shaped steel, first connecting plates are arranged at the ends, close to each other, of the I-shaped steel on the two sides, second connecting plates are arranged at the ends, away from each other, of the I-shaped steel on the two sides, and the I-shaped steel on the two sides is connected together through mutual connection of the first connecting plates. The adjacent supporting assemblies are connected together through mutual connection between the adjacent second connecting plates. According to the tunnel supporting device, the multiple supporting assemblies are arranged, the arc-shaped structure is formed by the multiple supporting assemblies, the top of a tunnel can be supported, multiple supporting points can be provided, and the tunnel supporting device has the advantages of being good in supporting effect and good in applicability.

Description

Technical Field

[0001] The utility model relates to an assembled vault structure applied to a large-span tunnel, belonging to the technical field of vault structures. Background Art

[0002] Prefabricated vault structures for long-span tunnels are an effective engineering solution that enables fast and efficient tunnel construction. This structure is usually composed of prefabricated components that can be manufactured and preassembled in the factory and then quickly installed on site. This not only reduces construction time on the construction site, but also improves construction quality and safety. In addition, prefabricated vault structures can also reduce the impact of construction on traffic because less time and space are required during construction.

[0003] In the prior art, a Chinese patent with a Chinese patent authorization announcement number of CN208024361U discloses a tunnel vault support structure, including an arc-shaped support arc plate, a cylindrical longitudinal support cylinder is vertically arranged at the center of the top of the inner wall of the support arc plate, a cylindrical longitudinal support rod is inserted in the longitudinal support cylinder, a concave thread is arranged inside the longitudinal support cylinder, a convex thread is arranged outside the longitudinal support rod, the longitudinal support cylinder and the longitudinal support rod are threadedly matched with each other, a transverse support cylinder and a transverse support rod are arranged at the bottom of the inner wall of the support arc plate, a concave thread is arranged inside the transverse support cylinder, a convex thread is arranged outside the transverse support rod, the transverse support cylinder and the transverse support rod are threadedly matched with each other, a disc-shaped pad is vertically arranged at the outer end of the transverse support cylinder and the transverse support rod, and a straight rod-shaped handle is vertically arranged on the side of the transverse support cylinder. When using it, the inner wall of the tunnel is built with cement concrete, and then the convex surface of the support arc plate is tightly attached to the inner wall of the tunnel, and the longitudinal support rod is rotated in the longitudinal support cylinder, and the longitudinal support rod is pressed against the ground to support the support arc plate longitudinally. Then rotate the transverse support rod in the transverse support cylinder, use two pads to tightly press against the two inner walls of the supporting arc plate, and support the supporting arc plate laterally. After the cement concrete solidifies, the tunnel arch support structure can be removed. It has the advantages of simple design, firmness and reliability, and is very convenient to install, which can effectively improve the construction efficiency of tunnel inner wall paving.

[0004] Although the above technical solution can achieve tunnel support, the support points acting on the supporting arc plate are too single, and it only relies on the structure formed by the longitudinal support tube, longitudinal support rod, transverse support tube and transverse support rod for adaptive support. There is a problem of insufficient support effect. If used in a tunnel with a larger span, it may not be able to provide the required supporting force. There is a problem of poor applicability, which can be improved. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides an assembled vault structure applied to a large-span tunnel.

[0006] The technical solution of the utility model is as follows:

[0007] A prefabricated vault structure applied to a large-span tunnel comprises a supporting arc plate for supporting the top of the tunnel, wherein symmetrically arranged legs are arranged below the supporting arc plate, and a plurality of supporting assemblies are arranged between the legs on both sides, and the supporting assemblies are spliced ​​with each other to form an arc structure adapted to the supporting arc plate so as to support the supporting arc plate; the supporting assemblies comprise symmetrically arranged I-beams, and first connecting plates are arranged on the ends of the I-beams on both sides close to each other, and second connecting plates are arranged on the ends of the I-beams on both sides away from each other, and the I-beams on both sides are connected together by mutual connection of the first connecting plates, and adjacent supporting assemblies are connected together by mutual connection between adjacent second connecting plates.

[0008] Among them, a plug-in column is arranged on the first connecting plate on one side of the support assembly, and a plug-in hole adapted to the plug-in column is opened on the first connecting plate on the other side. The first connecting plates on both sides are connected to each other by being plugged into the plug-in hole through the plug-in column.

[0009] Among them, the first connecting plate on one side of the support assembly is provided with a first connecting hole that is symmetrically arranged, and the first connecting plate on the other side is provided with a second connecting hole that is adapted to the first connecting hole, and a connecting installation groove is provided on one side of the I-beam, and a fixing plate is provided in the connecting installation groove, and symmetrically arranged threaded connecting columns are provided on the fixing plate, and the threaded connecting columns on both sides pass through the first connecting hole and the second connecting hole on the corresponding side in turn, and the ends of the threaded connecting columns on both sides away from the fixing plate side are both passed outward from the second connecting holes on the corresponding side, and locking nuts are locked on the passing ends of the threaded connecting columns on both sides.

[0010] Wherein, first assembly holes are provided on the second connecting plates on both sides of the support assembly, and the adjacent second connecting plates in adjacent support assemblies are connected to each other by inserting first assembly bolts into the first assembly holes.

[0011] Among them, a third connecting plate is arranged on the top of the supporting legs on both sides, and a second assembly hole adapted to the first assembly hole is opened on the third connecting plate. The second connecting plates on both sides located closest to the supporting legs on both sides are connected to the third connecting plates on both sides by inserting second assembly bolts into the first assembly holes and the second assembly holes.

[0012] Wherein, a traction ear is arranged on the plate wall of the fixing plate away from the threaded connection column side, and a traction hole is arranged on the I-beam above the connecting installation groove.

[0013] Among them, an arc-shaped support block is arranged between each supporting component and the supporting arc plate. The side wall of the arc-shaped support block close to the supporting arc plate is arranged closely with the supporting arc plate. The side wall of the arc-shaped support block close to the supporting component side is provided with an assembly groove to match the I-beam at the corresponding position.

[0014] Wherein, support connecting ears are arranged on both side walls of the arc-shaped support block.

[0015] The utility model has the following beneficial effects:

[0016] The utility model arranges a plurality of support components between the support legs on both sides. The plurality of support components can form an arc structure by connecting the first connecting plate and the second connecting plate. The formed arc structure can support the supporting arc plate, thereby supporting the tunnel top and providing a plurality of support points. At the same time, when it is suitable for tunnels of different sizes, the arch structure can be adapted to support the tunnel tops of different sizes by increasing or decreasing the corresponding number of support components. Compared with the prior art, the split structure can provide a plurality of support points and can flexibly change the size according to actual needs, and has the advantages of good support effect and good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is an exploded schematic diagram of the first connecting plate in the utility model when being connected;

[0019] Figure 3 is a schematic structural diagram of a second connecting plate;

[0020] Figure 4 is a schematic structural diagram of a third connecting plate;

[0021] Figure 5 This is an enlarged view of point A.

[0022] The reference numerals in the figure are as follows:

[0023] 1. Support arc plate; 2. Support leg; 3. I-beam; 4. First connecting plate; 5. Second connecting plate; 6. Plug-in column; 7. Plug-in hole; 8. First connecting hole; 9. Second connecting hole; 10. Connecting installation groove; 11. Fixing plate; 12. Threaded connecting column; 13. Locking nut; 14. First assembly hole; 15. First assembly bolt; 16. Third connecting plate; 17. Second assembly hole; 18. Second assembly bolt; 19. Pulling ear; 20. Pulling hole; 21. Arc-shaped support block; 22. Assembly groove; 23. Support connecting ear. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example: Please refer to Figures 1 to 5 The present embodiment provides an assembled vault structure for a large-span tunnel, including a supporting arc plate 1 for supporting the top of the tunnel, which is not fully shown in the figure. Support legs 2 are symmetrically arranged below the supporting arc plate 1, and a plurality of supporting components are arranged between the supporting legs 2 on both sides. The supporting components are spliced ​​with each other to form an arc structure adapted to the supporting arc plate 1 to support the supporting arc plate 1. The specific number of supporting components can be determined according to the size of the tunnel that actually needs to be supported.

[0026] In this embodiment, the support assembly includes symmetrically arranged I-beams 3, and first connecting plates 4 are provided on the ends of the I-beams 3 on both sides that are close to each other, and second connecting plates 5 are provided on the ends of the I-beams 3 on both sides that are far away from each other. The I-beams 3 on both sides are connected together by the mutual connection of the first connecting plates 4, and adjacent support assemblies are connected together by the mutual connection between adjacent second connecting plates 5.

[0027] In this embodiment, a plug-in column 6 is provided on the first connecting plate 4 on one side of the support assembly, and a plug-in hole 7 adapted to the plug-in column 6 is provided on the first connecting plate 4 on the other side, and the first connecting plates 4 on both sides are connected to each other by inserting the plug-in column 6 into the plug-in hole 7. First assembly holes 14 are provided on the second connecting plates 5 on both sides of the support assembly, and the adjacent second connecting plates 5 in the adjacent support assemblies are connected to each other by inserting first assembly bolts 15 into the first assembly holes 14. Third connecting plates 16 are provided on the tops of the two side legs 2, and second assembly holes 17 adapted to the first assembly holes 14 are provided on the third connecting plates 16. The second connecting plates 5 on both sides located closest to the two side legs 2 are connected to the third connecting plates 16 on both sides by inserting second assembly bolts 18 into the first assembly holes 14 and the second assembly holes 17.

[0028] Through the above-mentioned setting, by setting the assembled arch structure in a split type, when installing, first cast a supporting arc plate 1 of appropriate size according to the tunnel size, and then fix the supporting arc plate 1 to the top of the tunnel. The supporting arc plate 1 can be fixed by common anchoring and other methods. After the supporting arc plate 1 is fixed, the two side legs 2 are fixedly installed at the corresponding positions of the tunnel, and then a suitable number of supporting components are selected, and the installation starts from the position of the two side legs 2. The third connecting plate 16 and the second connecting plate 5 cooperate with the second assembly bolt 18 to connect one side of the I-beam 3 in the supporting component with the leg 2, and then the connection of the other I-beam 3 is completed by the cooperation of the plug column 6 and the plug hole 7. Then, the second connecting plate 5 is connected with the second connecting plate 5 in the adjacent supporting component through the first assembly bolt 15, so as to gradually install the supporting component between the two side legs 2, so that the supporting component supports the plate wall of the supporting arc plate 1 close to the leg 2, thereby realizing the support of the top of the tunnel.

[0029] In order to improve the connection stability between the first connecting plates 4 on both sides of the support assembly, in the present embodiment, the first connecting plate 4 on one side of the support assembly is provided with a symmetrically arranged first connecting hole 8, and the first connecting plate 4 on the other side is provided with a second connecting hole 9 which is adapted to the first connecting hole 8, wherein a connecting mounting groove 10 is provided on one side of the I-beam 3, a fixing plate 11 is provided in the connecting mounting groove 10, and symmetrically arranged threaded connecting columns 12 are provided on the fixing plate 11, the threaded connecting columns 12 on both sides pass through the first connecting hole 8 and the second connecting hole 9 on the corresponding side in turn, and the ends of the threaded connecting columns 12 on both sides away from the fixing plate 11 side are both passed outward from the second connecting hole 9 on the corresponding side, and locking nuts 13 are locked in the passing ends of the threaded connecting columns 12 on both sides. Through the above-mentioned settings, when the first connecting plates 4 on both sides are connected to each other through the plug-in columns 6 and the plug-in holes 7, at this time, the first connecting holes 8 and the second connecting holes 9 can be set accordingly. Thereafter, by placing the fixing plate 11 into the connecting mounting groove 10, and allowing the threaded connecting columns 12 on both sides of the fixing plate 11 to pass through the first connecting holes 8 and the second connecting holes 9 on the corresponding sides in turn, locking nuts 13 are locked into the ends of the threaded connecting columns 12 on both sides, so that the first connecting plates 4 on both sides can be further fixed, thereby ensuring the connection stability between the first connecting plates 4.

[0030] In order to facilitate the subsequent extraction of the fixing plate 11, a traction ear 19 is provided on the plate wall of the connecting plate away from the threaded connecting column 12. The subsequent staff can use the traction ear 19 to pull out the fixing plate 11 for easy use. At the same time, a traction hole 20 is provided on the I-beam 3 above the connecting installation groove 10. If it is difficult to extract the fixing plate 11 later, the passing staff can pass a traction member such as a traction rope through the traction hole 20, and then connect the traction member to the traction ear 19, so as to use the fulcrum provided by the traction hole 20 to extract the fixing plate 11.

[0031] Since the main body of the support assembly is made of I-beam 3, there will inevitably be a gap between the arc structure formed by the support assembly and the support arc plate 1, and the arc structure formed by the support assembly will only have a few mutually connected turning points that can provide support for the support arc plate 1. Therefore, in order to further improve the support effect of the arc structure formed by the support assembly, an arc support block 21 (not all of which are shown in the figure) is provided in the gap between each support assembly and the support arc plate 1. The side wall of the arc support block 21 close to the support arc plate 1 is closely arranged with the support arc plate 1. The side wall of the arc support block 21 close to the support assembly side is provided with an assembly groove 22 to match the I-beam 3 at the corresponding position. At the same time, support connection ears 23 are provided on both side walls of the arc support block 21. By setting the arc support block 21, the arc support block 21 can cooperate with the supporting structure to further support the supporting arc plate 1. When the arc support block 21 is set between the supporting arc plate 1 and the I-beam 3, the supporting connecting ear 23 is connected to the supporting arc plate 1 by locking the self-tapping screw into the supporting connecting ear 23, which can also play a role in reinforcing the arc support block 21.

[0032] It should be noted that, in order to enable multiple support components to form a compatible arc structure, the angle between the first connecting plate 4 and the second connecting plate 5 and the corresponding I-beam 3 is not the conventional 90°, but should be other compatible angles. The angle range is not limited here, and it is only necessary to ensure that multiple support components can form a compatible arc structure. At the same time, the angle between the first connecting plate 4 and the second connecting plate 5 and the corresponding I-beam 3 can be adjusted and set by technicians in this field according to actual conditions. Therefore, the specific angle selection method is not repeated.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An assembled vault structure for use in a large-span tunnel, comprising a supporting arc plate (1) for supporting the top of the tunnel, characterized in that: The supporting arc plate (1) is provided with symmetrically arranged supporting legs (2) below, and a plurality of supporting assemblies are provided between the supporting legs (2) on both sides, and the supporting assemblies are spliced ​​to form an arc structure adapted to the supporting arc plate (1) so as to support the supporting arc plate (1); the supporting assemblies comprise symmetrically arranged I-beams (3), and first connecting plates (4) are provided on the ends of the I-beams (3) on both sides that are close to each other, and second connecting plates (5) are provided on the ends of the I-beams (3) on both sides that are far from each other, and the I-beams (3) on both sides are connected together by connecting the first connecting plates (4), and adjacent supporting assemblies are connected together by connecting adjacent second connecting plates (5).

2. The assembled vault structure for use in a large-span tunnel according to claim 1, characterized in that: A plug-in column (6) is provided on the first connecting plate (4) on one side of the support assembly, and a plug-in hole (7) adapted to the plug-in column (6) is provided on the first connecting plate (4) on the other side. The first connecting plates (4) on both sides are connected to each other by being plugged into the plug-in hole (7) via the plug-in column (6).

3. The assembled vault structure for use in a large-span tunnel according to claim 1, characterized in that: The first connecting plate (4) on one side of the support assembly is provided with a symmetrically arranged first connecting hole (8), and the first connecting plate (4) on the other side is provided with a second connecting hole (9) arranged in correspondence with the first connecting hole (8). A connecting installation groove (10) is provided on one side of the I-beam (3), and a fixing plate (11) is arranged in the connecting installation groove (10). The fixing plate (11) is provided with symmetrically arranged threaded connecting columns (12), and the threaded connecting columns (12) on both sides sequentially pass through the first connecting hole (8) and the second connecting hole (9) on the corresponding side, and the ends of the threaded connecting columns (12) on both sides away from the fixing plate (11) are both passed outward from the second connecting hole (9) on the corresponding side, and locking nuts (13) are locked into the passing ends of the threaded connecting columns (12) on both sides.

4. The assembled vault structure for use in a large-span tunnel according to claim 1, characterized in that: The second connecting plates (5) on both sides of the support assembly are provided with first assembly holes (14), and adjacent second connecting plates (5) in adjacent support assemblies are connected to each other by inserting first assembly bolts (15) into the first assembly holes (14).

5. The assembled vault structure for use in a large-span tunnel according to claim 1, characterized in that: A third connecting plate (16) is provided at the top of the supporting legs (2) on both sides, and a second assembly hole (17) adapted to the first assembly hole (14) is provided on the third connecting plate (16). The second connecting plates (5) on both sides located closest to the supporting legs (2) on both sides are connected to the third connecting plates (16) on both sides by inserting second assembly bolts (18) into the first assembly hole (14) and the second assembly hole (17).

6. The assembled vault structure for use in a large-span tunnel according to claim 3, characterized in that: A traction ear (19) is provided on the plate wall of the fixing plate (11) away from the threaded connection column (12), and a traction hole (20) is provided on the I-beam (3) above the connecting installation groove (10).

7. The assembled vault structure for use in a large-span tunnel according to claim 1, characterized in that: An arc-shaped support block (21) is arranged between each of the support components and the support arc plate (1); the arc-shaped support block (21) is arranged close to the side wall of the support arc plate (1) and is arranged close to the support arc plate (1); and the side wall of the arc-shaped support block (21) is provided with an assembly groove (22) on the side wall of the support component so as to match the I-beam (3) at the corresponding position.

8. The assembled vault structure for use in a large-span tunnel according to claim 7, characterized in that: Support connection ears (23) are provided on both side walls of the arc-shaped support block (21).

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