Tunnel secondary lining stress main reinforcement supporting device

Abstract

The utility model relates to a tunnel secondary lining stress main rib supporting device, which belongs to the field of tunnel supporting and comprises a supporting structure arranged along the longitudinal direction of a tunnel, two ends of the supporting structure are connected with framework structures through screws, and the framework structures are fixed on the inner wall of the tunnel. A plurality of supporting sets are sequentially arranged on the side, facing the inner wall of the tunnel, of the supporting structure in the longitudinal direction of the tunnel. The framework structure is connected with the inner wall of the tunnel, and the supporting structure is in lap joint with the stress main reinforcements of the secondary lining, so that the pressure of the stress main reinforcements is shared, the deformation hidden danger of the stress main reinforcements and even the whole secondary lining reinforcements is reduced, and the safety performance is improved; the levelness of the supporting structure can be adjusted through screws, and the supporting structure is suitable for tunnel inner walls at different positions and with different levelness.

Description

Technical Field

[0001] The utility model relates to the field of tunnel support, in particular to a tunnel secondary lining stress-bearing main reinforcement support device. Background Art

[0002] For large-span tunnels, the weight of the secondary lining steel bars is tens of tons, and the total volume of the lining steel bars is large, which poses a safety and quality risk that the overall steel bar skeleton is easily deformed or collapsed. The current method often adopts the form of strengthening the main load-bearing bars to reduce skeleton deformation, but for super-large-span tunnels, the number of secondary lining steel bars is huge, and there is still a large risk of steel bar dislocation and deformation if it only relies on the support of the main load-bearing bars. Utility Model Content

[0003] The utility model aims to provide a tunnel secondary lining force main reinforcement supporting device, and its purpose is to solve the problem of easy dislocation and deformation of the secondary lining steel bars in the prior art.

[0004] The purpose of the utility model is achieved through such a technical solution, including a support structure arranged along the longitudinal direction of the tunnel, wherein both ends of the support structure are connected to a framework structure by screws, and the framework structure is fixed to the inner wall of the tunnel;

[0005] A plurality of support groups are sequentially arranged on one side of the support structure facing the inner wall of the tunnel along the longitudinal direction of the tunnel.

[0006] Preferably, each of the support groups is composed of two support screws, and the two support screws are threadedly connected to a side wall of the support structure facing the inner wall of the tunnel, and are arranged along the transverse direction of the tunnel.

[0007] Preferably, a level is provided on the supporting structure.

[0008] Preferably, a laser transmitter for positioning is provided on a side of the support structure away from the inner wall of the tunnel.

[0009] Preferably, the cross section of the support structure is an I-shape, and the two support screws are respectively installed on two side wings of the support structure on a side facing the inner wall of the tunnel.

[0010] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0011] 1. The utility model has a framework structure connected to the inner wall of the tunnel, and the supporting structure is overlapped with the main force-bearing reinforcement of the secondary lining, which shares the pressure of the main force-bearing reinforcement, reduces the deformation risk of the main force-bearing reinforcement and even the entire secondary lining reinforcement, and improves the safety performance; and the horizontality of the supporting structure can be adjusted by screws, which is suitable for tunnel inner walls at different positions and different levels.

[0012] 2. The support screw of the present utility model can adjust the height protruding from the screw hole. After the stressed main reinforcement is lapped on the support screw, adjusting the support screw can achieve the purpose of changing the height of the stressed main reinforcement itself.

[0013] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the examination and research of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The brief description of the drawings of the present utility model is as follows.

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is an installation schematic diagram of the present utility model.

[0017] Figure 3 It is a connection schematic diagram between the present utility model and the secondary lining steel bars.

[0018] In the figure: 1, framework structure; 2, support structure; 3, support screw; 4, level; 5, laser emitter; 6, screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] Embodiment 1

[0021] As Figures 1 to 3 shown, a support device for the stressed main reinforcement of the tunnel secondary lining includes a support structure 2 arranged along the longitudinal direction of the tunnel. Both ends of the support structure 2 are connected to a framework structure 1 through screws 6, and the framework structure 1 is fixed on the inner wall of the tunnel;

[0022] A number of support groups are sequentially arranged on one side of the support structure 2 facing the inner wall of the tunnel along the longitudinal direction of the tunnel.

[0023] In this embodiment, when tunnel secondary lining support is required, the framework structure 1 is fixedly installed on the top wall of the tunnel. A window is formed between the top wall of the tunnel, the framework structure 1, and the support structure 2. The stressed main reinforcement for support passes through the window and is placed on the support groups. The support groups and the support structure 2 share the pressure received by the stressed main reinforcement, reducing the potential for deformation of the stressed main reinforcement and even the entire secondary lining steel bars;

[0024] Specifically, the structural structures 1 at both ends are respectively provided with a plurality of screws 6, and the screws 6 are all threadedly connected to the supporting structure 2. When the horizontality of the supporting structure 2 needs to be adjusted, the screws 6 on any one end or the structural structures 1 at both ends are screwed to change the screwing length of the screws 6, so that the heights of the two ends of the supporting structure 2 are changed, thereby adjusting the horizontality of the supporting structure 2;

[0025] When the adjustment is completed, pour concrete to pour the main reinforcement, frame structure 1 and support structure 2 together to form a support;

[0026] The support group may be a support block or a support rod fixed on the support structure 2 .

[0027] Example 2

[0028] like Figure 1 As shown, on the basis of Example 1, each of the support groups is two support screws 3, and the two support screws 3 are threadedly connected to a side wall of the support structure 2 facing the inner wall of the tunnel, and are arranged along the transverse direction of the tunnel.

[0029] In this embodiment, the support screw 3 can be withdrawn from or screwed into the screw hole by twisting, thereby changing the horizontal height of one end of the support screw 3 extending out of the screw hole;

[0030] The main reinforcement is overlapped on the support screw 3, and the support screw 3 can share the pressure. At the same time, the height of the main reinforcement can be adjusted by adjusting the height of the support screw 3.

[0031] Example 3

[0032] like Figures 1 to 3 As shown, on the basis of Embodiment 1-2, a level 4 is provided on the support structure 2, and a laser transmitter 5 for positioning is provided on the side of the support structure 2 away from the inner wall of the tunnel.

[0033] In this embodiment, the level 4 is a bubble level, which is used to determine whether the support structure 2 is level when the levelness needs to be adjusted;

[0034] Specifically, Figure 3 As shown, a number of main force bars are arranged in sequence along the longitudinal direction in the tunnel, and the support structure 2 supports the main force bars. A number of positioning steel bars (not shown in the figure) are also arranged on the side walls in the tunnel. The angle of the laser emitter 5 is pre-adjusted so that the laser emitter 5 shines on the positioning steel bars to verify the installation position of the support structure 2.

[0035] Example 4

[0036] like Figure 1As shown, on the basis of Example 2, the cross section of the support structure 2 is an I-shape, and the two support screws 3 are respectively installed on the two side wings of the support structure 2 facing the inner wall of the tunnel.

[0037] In this embodiment, the I-shaped support structure 2 has better stress bearing performance.

[0038] Specifically, the cross section of the framework structure 1 is also I-shaped, and the length direction of the framework structure 1 is perpendicular to the length direction of the support structure 2 .

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A tunnel secondary lining force main reinforcement support device, characterized in that: It comprises a support structure (2) arranged along the longitudinal direction of the tunnel, wherein both ends of the support structure (2) are connected to a framework structure (1) via screws (6), and the framework structure (1) is fixed on the inner wall of the tunnel; A plurality of support groups are sequentially arranged along the longitudinal direction of the tunnel on one side of the support structure (2) facing the inner wall of the tunnel.

2. According to claim 1, a tunnel secondary lining force main reinforcement support device is characterized in that: Each of the support groups comprises two support screws (3), the two support screws (3) being threadedly connected to a side wall of the support structure (2) facing the inner wall of the tunnel, and being arranged along the transverse direction of the tunnel.

3. According to claim 1, a tunnel secondary lining force main reinforcement support device is characterized in that: A level (4) is provided on the support structure (2).

4. A tunnel secondary lining force main reinforcement support device according to claim 1, characterized in that: A laser transmitter (5) for positioning is provided on the side of the support structure (2) away from the inner wall of the tunnel.

5. According to claim 2, a tunnel secondary lining force main reinforcement support device is characterized in that: The cross section of the support structure (2) is an I-shape, and the two support screws (3) are respectively installed on two side wings of the support structure (2) on the side facing the inner wall of the tunnel.

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