A positioning device for the second lining of an angle steel tunnel

Abstract

The utility model relates to a tunnel construction technical field especially relates to a kind of angle steel tunnel secondary lining positioning device.The angle steel tunnel secondary lining positioning device includes angle steel, and the side plate face of angle steel is equipped with reinforcing bar slot, and limit component is installed on the bottom plate of angle steel.The angle steel tunnel secondary lining positioning device provided by the utility model is holed according to the design interval of secondary lining main reinforcement on angle steel, to ensure the matching degree with secondary lining main reinforcement, to realize accurate positioning;Secondary lining main reinforcement is fixed by being passed through reinforcing bar slot by limit component, and this fixed mode is simple and efficient, can ensure the accuracy of main reinforcement position, also effectively avoid the displacement of main reinforcement in construction process, ensure that secondary lining reinforcing bar protective layer thickness is uniform, to ensure that secondary lining structure stress is uniform, reduce later disease risk.In addition, the device can be reused, can be used in multiple tunnel projects, reduce the processing loss of temporary component, reduce construction material cost and equipment investment cost.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a positioning device for the secondary lining of an angle steel tunnel. Background Technology

[0002] During tunnel construction, the secondary lining, as an important load-bearing and protective component of the tunnel structure, directly determines the overall stability, durability, and operational safety of the tunnel. Among these factors, the precise positioning of the secondary lining reinforcement is one of the core aspects of secondary lining construction quality control. If the positioning deviation of the reinforcement is too large, it will not only lead to uneven stress on the secondary lining structure, making it prone to cracks, leaks, and other defects, but may also affect the tunnel clearance dimensions, posing safety hazards to subsequent tunnel operation.

[0003] Currently, the positioning of secondary lining reinforcement in tunnels mostly adopts traditional scaffolding or manual binding methods. Traditional scaffolding requires the on-site fabrication of a large number of temporary support components, which have poor component versatility. For secondary lining construction with different tunnel cross-sections and different reinforcement spacings, scaffolding needs to be redesigned and fabricated, resulting in serious material waste and increased construction costs. Moreover, the scaffolding installation and adjustment process is cumbersome and it is difficult to ensure the positioning accuracy of the reinforcement. Manual binding relies on the experience of construction personnel, resulting in low construction efficiency. In areas with dense reinforcement, problems such as uneven reinforcement spacing and insufficient protective layer thickness are prone to occur. Especially in the construction of curved tunnels or large-section tunnels, it is difficult to accurately control the spatial position of the reinforcement manually, further exacerbating the risk of positioning deviation. In addition, in traditional positioning methods, it is difficult to adjust the reinforcement after it is fixed. If a positioning deviation is found, the scaffolding needs to be dismantled and re-bound or adjusted, which not only delays the construction period but may also damage the already bound reinforcement, affecting the overall integrity of the secondary lining structure.

[0004] Therefore, it is necessary to provide a new positioning device for the secondary lining of angle steel tunnels to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a positioning device for the secondary lining of an angle steel tunnel.

[0006] The angle steel tunnel secondary lining positioning device provided by this utility model includes an angle steel, and the side plate of the angle steel is provided with a plurality of steel bar slots that are equally spaced vertically, and the bottom plate of the angle steel is provided with a plurality of limiting components that are equally spaced vertically, and the limiting components correspond one-to-one with the steel bar slots. The limiting component includes a sleeve, which is fixedly welded to the base plate of the angle steel, and a U-shaped hook with elastic connection is installed on the sleeve, through which the main reinforcing bar passing through the reinforcing bar slot is hooked.

[0007] Preferably, the sleeve is provided with an elastically connected insertion rod, and one end of the insertion rod extends out of the sleeve and is fixedly connected to the connecting end of the U-shaped hook.

[0008] Preferably, a tension spring is installed inside the sleeve, one end of which is fixedly connected to the inner bottom wall of the sleeve, and the other end of which is fixedly connected to the insertion end of the insertion rod.

[0009] Preferably, stirrup holes are provided on the angle steel side plates on both the upper and lower sides of the rebar slot.

[0010] Preferably, the rebar slot is a straight groove structure, and the end of the inner wall of the straight groove is a semi-circular structure, and the semi-circular structure of the straight groove is coaxially arranged with the U-shaped hook.

[0011] Preferably, the rebar slot is an L-shaped groove structure, and the bottom of the vertical section of the L-shaped groove is a semi-circular structure, with the semi-circular structure of the L-shaped groove being coaxially arranged with the U-shaped hook.

[0012] Compared with related technologies, the angle steel tunnel secondary lining positioning device provided by this utility model has the following beneficial effects: This invention utilizes the design spacing of the secondary lining main reinforcement bars to create holes (i.e., rebar slots) on angle steel, ensuring a high degree of matching with the main reinforcement bars and achieving precise positioning. After the holes are created, the secondary lining main reinforcement bars are passed through the rebar slots and fixed using limiting components. This invention is reusable and can be reused in multiple tunnel projects, reducing processing losses of temporary components and lowering construction material and equipment costs. The rebar slots offer two structural options: a straight slot and an L-shaped slot. The straight slot is easy to process and suitable for straight tunnels or construction scenarios with regular main reinforcement bar arrangements. The vertical section of the L-shaped slot can restrict the front and rear positions of the main reinforcement bars. Combined with the vertical fixing effect of the U-shaped hook, stable positioning of the main reinforcement bars can be achieved without secondary fixing with stirrups. This is suitable for curved tunnels or construction scenarios with dense reinforcement bars and limited space for stirrup installation, improving the adaptability of the device to different construction environments. Attached Figure Description

[0013] Figure 1 A schematic diagram of a preferred embodiment of the angle steel tunnel lining positioning device provided by this utility model; Figure 2 for Figure 1 A magnified structural diagram of point A is shown below; Figure 3 for Figure 2 A cross-sectional view of the limiting component shown. Figure 4 for Figure 1 The diagram shows a planar structure. Figure 5 This is a structural diagram of the present invention for positioning reinforcing bars; Figure 6 This is one of the enlarged structural schematic diagrams of the rebar slot in this utility model; Figure 7 This is the second enlarged structural schematic diagram of the rebar slot in this utility model.

[0014] The following are the labels in the diagram: 1. Angle steel; 1a. Rebar slot; 1a1. Straight groove; 1a2. L-shaped groove; 1b. Stirrup hole; 2. Limiting component; 21. Sleeve; 22. U-shaped hook; 23. Insertion rod; 24. Tension spring. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] Please see Figures 1 to 7 This utility model provides a positioning device for the secondary lining of an angle steel tunnel, which includes an angle steel 1 and a limiting component 2.

[0018] In the embodiments of this utility model, please refer to Figures 1 to 5 The side plate of the angle steel 1 has several steel bar slots 1a that are equidistantly distributed vertically, and the bottom plate of the angle steel 1 has several limiting components 2 that are equidistantly distributed vertically, with each limiting component 2 corresponding to a steel bar slot 1a.

[0019] The limiting component 2 includes a sleeve 21, which is fixedly welded to the base plate of the angle steel 1. A U-shaped hook 22 with elastic connection is installed on the sleeve 21. The main reinforcing bar passing through the rebar slot 1a is hooked by the U-shaped hook 22. Specifically, an elastic insertion rod 23 is inserted into the sleeve 21, and one end of the insertion rod 23 extends out of the sleeve 21 and is fixedly connected to the connection end of the U-shaped hook 22. A tension spring 24 is installed inside the sleeve 21. One end of the tension spring 24 is fixedly connected to the inner bottom wall of the sleeve 21, and the other end of the tension spring 24 is fixedly connected to the insertion end of the insertion rod 23. Stirrup holes 1b are opened on the side plates of the angle steel 1 on both the upper and lower sides of the rebar slot 1a.

[0020] It should be noted that angle steel 1 needs to be installed between the secondary lining reinforcement and the primary support structure of the tunnel, arranged at intervals along the longitudinal direction of the tunnel. The specific location needs to be determined according to the design layout of the secondary lining reinforcement. For single-layer secondary lining reinforcement, angle steel 1 is installed on the outside of the reinforcement (closer to the primary support structure) to ensure that the reinforcement slot 1a corresponds to the position of the main reinforcement. For double-layer secondary lining reinforcement, angle steel 1 needs to be installed between the inner and outer layers of reinforcement and the primary support structure, and between the inner and outer layers of reinforcement. The inner angle steel 1 is used to fix the inner main reinforcement, and the outer angle steel 1 is used to fix the outer main reinforcement. The two layers of angle steel 1 need to be kept parallel to ensure that the spacing between the inner and outer reinforcement meets the design requirements. In addition, at different parts such as the tunnel arch, arch waist, and sidewalls, angle steel 1 needs to be installed along the curve of the tunnel cross section to ensure that it is parallel to the tunnel axis and that the secondary lining reinforcement as a whole conforms to the designed tunnel cross section shape. Bolt holes will be drilled on angle steel 1 and angle steel 1 will be fitted to the marked position of the initial support structure. The bolt holes on angle steel 1 will be aligned with the drilled holes of the initial support structure. Expansion bolts will be inserted and tightened to ensure that angle steel 1 is firmly fixed and without loosening. For curved tunnels or uneven parts of the initial support structure surface, wedge-shaped shims will be inserted between angle steel 1 and the initial support structure to adjust the verticality and angle of angle steel 1 so that the rebar slot 1a is at the designed height and position.

[0021] It should also be noted that: This application ensures precise positioning by drilling holes (i.e., rebar slots 1a) in the angle steel 1 according to the designed spacing of the secondary lining main reinforcement bars. After drilling, the secondary lining main reinforcement bars are passed through the rebar slots 1a and fixed by the limiting component 2. Specifically: Before inserting the secondary lining main reinforcement, the U-shaped hook 22 is deflected so that the hook head of the U-shaped hook 22 turns downward. Then, the secondary lining main reinforcement is inserted horizontally through the rebar slot 1a. After completion, the U-shaped hook 22 is pulled outward so that the insertion rod 23 slides outward along the sleeve 21 while stretching the tension spring 24. When the hook head of the U-shaped hook 22 exceeds the secondary lining main reinforcement, the U-shaped hook 22 is rotated so that the hook head turns upward. Then, the U-shaped hook 22 is released, and under the action of the elastic force of the tension spring 24, the U-shaped hook 22 can fix the secondary lining main reinforcement to the angle steel 1. This fixing method is simple and efficient, which can ensure the accuracy of the main reinforcement position, and can also effectively prevent the main reinforcement from shifting during construction, ensure the uniformity of the secondary lining reinforcement protective layer thickness, make the secondary lining steel structure uniformly stressed, and reduce the safety risks in the later stage.

[0022] It should be noted that, in order to improve the fixing effect of the secondary lining main reinforcement, stirrups can be used to pass through stirrup holes 1b and be fixed to the secondary lining main reinforcement at the corresponding positions.

[0023] It is worth noting that the structural design of angle steel 1 can be adapted to tunnels with different cross-sectional dimensions. For construction requirements with different main reinforcement spacing, only the opening spacing of the reinforcement slot 1a needs to be adjusted. Moreover, this application can be reused and used in multiple tunnel projects, reducing the processing loss of temporary components and lowering the cost of construction materials and equipment.

[0024] In the embodiments of this utility model, please refer to Figure 1 , Figure 3 , Figure 5 as well as Figure 6 The rebar slot 1a is a straight groove 1a1 structure, and the end of the inner wall of the straight groove 1a1 is a semi-circular structure. The semi-circular structure of the straight groove 1a1 is coaxially set with the U-shaped hook 22.

[0025] It should be noted that the machining and opening of the straight groove 1a1 is simple and convenient.

[0026] In the embodiments of this utility model, please refer to Figure 1 , Figure 3 , Figure 5 as well as Figure 7 The rebar slot 1a is an L-shaped groove 1a2 structure, and the bottom of the vertical section of the L-shaped groove 1a2 is a semi-circular structure. The semi-circular structure of the L-shaped groove 1a2 is coaxially set with the U-shaped hook 22.

[0027] It should be noted that when using the L-shaped trough 1a2, the secondary lining main reinforcement is slid into the vertical section of the L-shaped trough 1a2, and then the secondary lining main reinforcement is fixed by the limiting component 2. Since the vertical section of the L-shaped trough 1a2 can restrict the front and rear position of the secondary lining main reinforcement, and the limiting component 2 can restrict the vertical position of the secondary lining main reinforcement, after the limiting component 2 restricts the secondary lining main reinforcement located in the L-shaped trough 1a2, there is no need for stirrups to fix the secondary lining main reinforcement a second time.

[0028] Among them, the rebar slot 1a offers two structural options: a straight slot 1a1 and an L-shaped slot 1a2. The straight slot 1a1 is easy to process and is suitable for construction scenarios with straight tunnels or regular main reinforcement arrangement. The vertical section of the L-shaped slot 1a2 can restrict the front and rear positions of the main reinforcement. With the upper and lower fixing function of the U-shaped hook 22, the main reinforcement can be stably positioned without the need for secondary fixing of stirrups. It is suitable for construction scenarios with curved tunnels or dense reinforcement and limited space for stirrup installation, thus improving the adaptability of the device to different construction environments.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning device for the secondary lining of an angle steel tunnel, characterized in that, The angle steel (1) is provided with a number of steel bar slots (1a) that are equidistantly distributed vertically on the side plate surface, and a number of limiting components (2) that are equidistantly distributed vertically are installed on the bottom plate of the angle steel (1), and the limiting components (2) correspond one-to-one with the steel bar slots (1a). The limiting component (2) includes a sleeve (21), which is fixedly welded to the base plate of the angle steel (1), and a U-shaped hook (22) with elastic connection is installed on the sleeve (21) to hook the main bar passing through the rebar slot (1a).

2. The angle steel tunnel secondary lining positioning device according to claim 1, characterized in that, The sleeve (21) is provided with an elastically connected insertion rod (23), and one end of the insertion rod (23) extends out of the sleeve (21) and is fixedly connected to the connecting end of the U-shaped hook (22).

3. The angle steel tunnel secondary lining positioning device according to claim 2, characterized in that, A tension spring (24) is installed inside the sleeve (21). One end of the tension spring (24) is fixedly connected to the inner bottom wall of the sleeve (21), and the other end of the tension spring (24) is fixedly connected to the insertion end of the insertion rod (23).

4. The angle steel tunnel secondary lining positioning device according to claim 1, 2, or 3, characterized in that, The angle steel (1) side plates on both the upper and lower sides of the rebar slot (1a) are provided with stirrup holes (1b).

5. The angle steel tunnel secondary lining positioning device according to claim 1, characterized in that, The rebar slot (1a) is a straight groove (1a1) structure, and the end of the inner wall of the straight groove (1a1) is a semi-circular structure. The semi-circular structure of the straight groove (1a1) is coaxially arranged with the U-shaped hook (22).

6. The angle steel tunnel secondary lining positioning device according to claim 1, characterized in that, The rebar slot (1a) is an L-shaped groove (1a2) structure, and the bottom of the vertical section of the L-shaped groove (1a2) is a semi-circular structure. The semi-circular structure of the L-shaped groove (1a2) is coaxially arranged with the U-shaped hook (22).

Images