Tunnel safety supporting device

Abstract

The utility model discloses a tunnel safety supporting device which comprises a steel bar net face arranged on the inner wall of a tunnel, a plurality of first anchor rods supporting the steel bar net face, arch frames, second anchor rods forming hoops for the arch frames and clamping plates fixing the adjacent arch frames. The end, used for splicing, of the steel frame is provided with an installation face used for fixed connection, the second anchor rods are installed on the two sides of the steel frame in pairs and anchored on the inner wall of the tunnel in an inclined mode, the second anchor rods are provided with bent parts, and the bent parts are welded to the steel frame. According to the technical scheme, the inclined anchor rods are arranged at multiple positions of the lagging jack to lift and fix the whole, and the clamping plates between the lagging jacks can further improve the rigidity and stability of the lagging jack in the longitudinal direction of the tunnel.

Description

Technical Field

[0001] The utility model relates to a tunnel safety supporting device. Background Art

[0002] During road construction, especially in mountainous areas, construction units often need to open tunnels in the mountains to connect the roads. During the tunnel excavation process, it is necessary to promptly provide initial support to the inner wall of the tunnel to prevent the disturbed rock layers on the inner wall from falling off, providing a safer construction environment for the tunnel lining construction, thereby improving the safety factor of construction. The existing support structure usually arranges a steel mesh on the arched surface of the tunnel, and sets an arched steel frame on the outside of the steel mesh for support. The connection between the steel mesh and the steel frame is fixed by welding. In order to further improve the safety of tunnel construction, the stability of the steel frame needs to be further improved. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a tunnel safety support device to improve the stability of the support and enhance the safety of tunnel construction operations.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tunnel safety support device, comprising a steel mesh arranged on the inner wall of the tunnel, a plurality of first anchor rods supporting the steel mesh, an arch frame, a second anchor rod forming a clamp for the arch frame, and a splint for fixing adjacent arch frames. The arch frame is formed by splicing a plurality of steel frames, and one end of the steel frame used for splicing is provided with a mounting surface for fixed connection. The second anchor rods are installed in pairs on both sides of the steel frame and are anchored obliquely on the inner wall of the tunnel. The second anchor rods are provided with a bending portion, and the bending portion is welded to the steel frame.

[0005] As a further improvement of the present invention, the ends of the clamping plates facing the mounting surface are respectively provided with bayonets, which abut against the mounting surface and are fixedly connected by a locking member.

[0006] As a further improvement of the present invention, third anchor rods are respectively installed on both sides of the splint to abut against it, and the third anchor rods are arranged at intervals along the length of the splint.

[0007] As a further improvement of the present invention, the ends of the steel frame in contact with the tunnel ground are provided with locking feet, which are installed in pairs on both sides of the steel frame and fixedly connected to the steel frame, and the locking feet are respectively provided with fourth anchor rods obliquely anchored to the ground.

[0008] As a further improvement of the present invention, the second anchor rods are arranged in a plurality of groups along the length of the steel frame and are staggered relative to the bent portions on the second anchor rods.

[0009] The beneficial effects of the present invention are as follows: by arranging inclined anchor rods at multiple locations of the arch frame to enhance the fixation of the whole, the splints between the arch frames can further improve the rigidity and stability of the arch frame along the longitudinal direction of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0011] Figure 2 This is a schematic diagram of the arch frame fixing embodiment of the utility model.

[0012] Figure numbers: 1. Steel mesh surface; 2. Arch frame; 3. Second anchor rod; 4. Clamp; 5. Steel frame; 6. Mounting surface; 7. Bending part; 8. Bayonet; 9. Third anchor rod; 10. Locking foot; 11. Fourth anchor rod. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0014] Reference Figure 1-2 As shown, a tunnel safety support device includes a steel mesh 1 arranged on the inner wall of the tunnel, a plurality of first anchor rods for supporting the steel mesh 1, an arch frame 2, a second anchor rod 3 forming a clamp for the arch frame 2, and a splint 4 for fixing the adjacent arch frame 2. The arch frame 2 is spliced ​​by a plurality of steel frames 5, and one end of the steel frame 5 used for splicing is provided with a mounting surface 6 for fixed connection, and the mounting surface 6 is used to abut against each other to transfer load. The second anchor rods 3 are installed in pairs on both sides of the steel frame 5 and are anchored obliquely on the inner wall of the tunnel. The second anchor rods 3 are provided with a bending portion 7, and the bending portion 7 is welded to the steel frame 5. The obliquely arranged second anchor rods 3 are not easy to fall out when subjected to force, and can reliably limit the steel frame 5. In this embodiment, the second anchor rods 3 arranged in pairs are arranged in two groups along the length of the steel frame 5, and the bending portions 7 of the relative second anchor rods 3 are staggered so that the bending portion 7 can increase the welding surface with the steel frame 5.

[0015] The ends of the splints 4 facing the mounting surface 6 are respectively provided with bayonet holes 8, and the bayonet holes 8 abut against the mounting surface 6 and are fixedly connected by locking members. Usually, multiple arch frames 2 are arranged on the inner wall of the tunnel, and the splints 4 are arranged between adjacent arch frames 2 to support and abut the arch frames 2 on both sides thereof to improve the rigidity and stability of the arch frames 2 along the longitudinal direction of the tunnel. The locking members are usually matched with steel bolts and steel nuts. The steel bolts extend out of the splints 4 and the mounting surface 6 and are locked by steel nuts. In this embodiment, third anchor rods 9 are respectively installed on both sides of the splint 4 to abut against it. The third anchor rods 9 are mainly used to support the splint 4 and improve the anti-deformation strength of the splint 4 so that it can reliably support the arch frames 2 on both sides.

[0016] The ends of the steel frame 5 that contact the tunnel ground are provided with locking feet 10. The locking feet 10 are installed in pairs on both sides of the steel frame 5 and are fixedly connected to the steel frame 5. The locking feet 10 are respectively provided with fourth anchor rods 11 that are obliquely anchored to the ground. The locking feet 10 can also be fixed by welding, or by combining bolts and welding. The provision of the locking feet 10 further improves the stability of the arch frame 2.

[0017] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A tunnel safety support device, comprising a steel mesh arranged on the inner wall of the tunnel and a plurality of first anchor rods supporting the steel mesh, characterized in that: It also includes an arch frame, a second anchor rod forming a hoop for the arch frame, and a splint for fixing adjacent arch frames. The arch frame is formed by splicing several steel frames. One end of the steel frame used for splicing is provided with a mounting surface for fixed connection. The second anchor rod is installed in pairs on both sides of the steel frame and is anchored obliquely to the inner wall of the tunnel. The second anchor rod is provided with a bending portion, which is welded to the steel frame.

2. The tunnel safety support device according to claim 1, characterized in that: The ends of the clamping plates facing the mounting surface are respectively provided with bayonets, which abut against the mounting surface and are fixedly connected via locking pieces.

3. The tunnel safety support device according to claim 2, characterized in that: Third anchor rods are respectively installed on both sides of the splint to abut against it, and the third anchor rods are arranged at intervals along the length of the splint.

4. The tunnel safety support device according to claim 1, characterized in that: The ends of the steel frame in contact with the tunnel ground are provided with locking feet, which are installed in pairs on both sides of the steel frame and fixedly connected to the steel frame. The locking feet are respectively provided with fourth anchor rods obliquely anchored to the ground.

5. The tunnel safety support device according to claim 1, characterized in that: The second anchor rods are arranged in a plurality of groups along the length of the steel frame and are staggered relative to the bent portions on the second anchor rods.

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