Protective structure for tunnel construction

Abstract

The utility model discloses a protective structure for tunnel construction, which relates to the technical field of tunnel construction and comprises two bridge bodies, a center joint is arranged between the two bridge bodies, a plurality of anti-skidding steel plates are uniformly arranged at the upper end of the center joint, and first welding plates are symmetrically fixed on one side of the upper end of each anti-skidding steel plate. A connecting steel bar is fixed to the side, away from the anti-skid steel plate, of each first welding plate, positioning nuts are movably connected to the outer sides of the two ends of each connecting steel bar, and a second welding plate is fixed to the other side of the upper end of each anti-skid steel plate. According to the protection structure for tunnel construction, through the overall structural matching design, the center joint can be covered and protected, it is guaranteed that personnel can stably walk at the upper end of the center joint and are not prone to sliding, the lifting lugs are grabbed, the corresponding anti-skid steel plates can be turned over to be opened with the connecting steel bars as the axes, and concrete pouring operation is conducted; therefore, covering protection of personnel is facilitated, and construction operation is also facilitated.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a protective structure for tunnel construction. Background Technology

[0002] Currently, traditional invert arch trestle bridges are set up at tunnel construction sites to ensure uninterrupted transportation and access to the tunnel face and lower guide tunnels during invert arch excavation and lining operations. The application of invert arch trestle bridges ensures the smooth progress of tunnel construction, but they also become a major traffic artery in the middle of the tunnel, with vehicles and personnel passing over them. The safety protection of the trestle bridge is of paramount importance. Currently, the main protective measures for the joints of invert arch trestle bridges include portal-type movable steel mesh protection and horizontal safety net protection.

[0003] The portal-type movable steel mesh is folded down and horizontally, and then tied to the upper edge of the trestle bridge with chains. Although the strength can meet the weight requirements of personnel, there is a 40cm height difference between the protective surface and the bridge surface. When people walk on the trestle bridge, they may be injured due to instability. Moreover, due to the height difference, it is very inconvenient to set up the protection, and it is often damaged when the trestle bridge is moved. Horizontal safety nets are lightweight and convenient, but the hanging is still troublesome, and the hanging quality cannot be guaranteed consistently. Although they can be hung close to the upper edge of the trestle bridge, they are soft and lack rigidity, so people may still be injured due to instability when walking on the trestle bridge. All of the above-mentioned existing protective measures have different degrees of safety hazards. Therefore, this application proposes a protective structure for tunnel construction. Utility Model Content

[0004] Therefore, it is necessary to provide a protective structure for tunnel construction to address the aforementioned technical problems. Through the overall structural design, the central joint can be covered and protected, ensuring that personnel can walk stably on the upper part of the joint without slipping. At the same time, there is no height difference between the protective surface and the bridge body. Furthermore, when it is necessary to pour concrete into the inner side of the central joint, after determining the specific location, the workers can grab the lifting lug and flip and open the corresponding anti-slip steel plate with the connecting steel bar as the axis to carry out the concrete pouring operation. This achieves both convenient personnel coverage and protection and convenient construction operations.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A protective structure for tunnel construction, applied to an arch trestle bridge at a tunnel construction site; comprising two bridge bodies with a central joint between them; multiple anti-slip steel plates evenly arranged at the upper end of the central joint; the anti-slip steel plates are located at the upper end of the bridge body, with each pair of anti-slip steel plates fitting together; a first welding plate is symmetrically fixed to one side of the upper end of each anti-slip steel plate; a connecting reinforcing bar is fixed to the side of each first welding plate away from the anti-slip steel plate; positioning nuts are movably connected to the outer sides of both ends of the connecting reinforcing bars; the positioning nuts are welded and fixed to the bridge body; a second welding plate is fixed to the other side of the upper end of each anti-slip steel plate; and a lifting lug is fixed to the upper end of the second welding plate.

[0007] As a preferred embodiment of the protective structure for tunnel construction provided by this utility model, multiple bottom beams are fixed at the bottom ends of both bridge bodies, and a bearing frame is slidably connected between every two bottom beams. The bearing frame is located on the outside of the bridge body, and a limit component is provided at the upper end of the bearing frame.

[0008] As a preferred embodiment of the protective structure for tunnel construction provided by this utility model, each of the supporting base frames is fixed with a positioning column on the side away from the bridge body and at the four corners of the supporting base frame. An X-shaped prefabricated frame is provided between every two supporting base frames. The X-shaped prefabricated frame is slidably connected to the positioning column. A second fastening nut is provided at the four corners of the outer side of each X-shaped prefabricated frame. The second fastening nut is fitted with the X-shaped prefabricated frame and threadedly connected to the positioning column.

[0009] As a preferred embodiment of the protective structure for tunnel construction provided by this utility model, the limiting component includes limiting longitudinal rods, and the upper end of each of the bearing base frames is symmetrically fixed with limiting longitudinal rods, and multiple diagonal bracing shafts are uniformly fixed between two of the limiting longitudinal rods.

[0010] As a preferred embodiment of the protective structure for tunnel construction provided by this utility model, each of the inclined support shafts is rotatably connected to a plastic sleeve on its outer side, and a soft rubber pad is fixed to the outer side of the plastic sleeve.

[0011] As a preferred embodiment of the protective structure for tunnel construction provided by this utility model, each of the bottom beam cross columns is threaded with a first fastening nut on its outer side, and the first fastening nut is in contact with the supporting base frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The protective structure for tunnel construction provided by this utility model, through its overall structural design, can cover and protect the central joint, ensuring that personnel can walk stably on the upper part of the joint without slipping. At the same time, there is no height difference between the protective surface and the bridge body. When it is necessary to pour concrete into the inner side of the central joint, after the workers determine the specific location, they can grab the lifting lug and flip and open the corresponding anti-slip steel plate with the connecting steel bar as the axis to carry out the concrete pouring operation. Thus, it is convenient for both personnel to be covered and protected, and for construction operations to be convenient.

[0014] Furthermore, another advantage of the equipment in this case is that the protective structure is constructed using a modular assembly method, allowing for rapid setup in key vehicle and pedestrian areas, and is reinforced with X-shaped prefabricated frames. Additionally, the protective structure can be disassembled and reused in modules after application, significantly improving the reusability of components. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the overall structure of the protective structure for tunnel construction provided by this utility model;

[0017] Figure 2 A schematic diagram of the upper end of the central joint of the protective structure for tunnel construction provided by this utility model;

[0018] Figure 3 A schematic diagram of the outer side of the protective structure bearing base for tunnel construction provided by this utility model;

[0019] Figure 4 This is a schematic diagram of the outer side of the inclined support shaft of the protective structure for tunnel construction provided by this utility model.

[0020] The markings in the diagram are explained as follows:

[0021] 1. Bridge body; 2. Central joint; 3. Anti-slip steel plate; 4. First welding plate; 5. Connecting steel bar; 6. Positioning nut; 7. Second welding plate; 8. Lifting lug; 9. Bottom beam cross column; 10. Bearing base frame; 11. First fastening nut; 12. Positioning column; 13. X-shaped prefabricated frame; 14. Second fastening nut; 15. Limiting longitudinal bar; 16. Diagonal brace support shaft; 17. Plastic sleeve; 18. Soft rubber pad. Detailed Implementation

[0022] As described in the background section, the current protective measures for the central joint of the arch bridge mainly include portal-type movable steel mesh protection and horizontal safety net protection. All of the above-mentioned existing protective measures have varying degrees of safety hazards.

[0023] To solve this technical problem, this utility model provides a protective structure for tunnel construction, which is applied to the inverted arch trestle bridge at the tunnel construction site.

[0024] The bridge consists of two bridge bodies 1, with a central seam 2 between them. Multiple anti-slip steel plates 3 are evenly distributed at the upper end of the central seam 2. The anti-slip steel plates 3 are located on the upper end of the bridge body 1, and each pair of anti-slip steel plates 3 are fitted together. A first welding plate 4 is symmetrically fixed to one side of the upper end of each anti-slip steel plate 3. A connecting steel bar 5 is fixed to the side of each first welding plate 4 away from the anti-slip steel plate 3. Positioning nuts 6 are movably connected to the outer sides of both ends of the connecting steel bar 5. The positioning nuts 6 are welded and fixed to the bridge body 1. A second welding plate 7 is fixed to the other side of the upper end of each anti-slip steel plate 3. A lifting lug 8 is fixed to the upper end of the second welding plate 7.

[0025] The protective structure for tunnel construction provided by this utility model, through the overall structural design, can cover and protect the central joint 2, ensuring that personnel can walk stably on the upper part of the central joint 2 without slipping. At the same time, there is no height difference between the protective surface and the bridge body 1. When it is necessary to pour concrete into the inner side of the central joint 2, after the workers determine the specific location, they can grab the lifting lug 8 and flip it open with the connecting steel bar 5 as the axis to pour the concrete. Thus, it is convenient for both personnel to be covered and protected, and for construction operations to be convenient.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] Example 1:

[0029] Please refer to Figure 1-4 A protective structure for tunnel construction includes two bridge bodies 1, with a central joint 2 between the two bridge bodies 1. In order to cover and protect the central joint 2, multiple anti-slip steel plates 3 are evenly arranged at the upper end of the central joint 2. The anti-slip steel plates 3 are located at the upper end of the bridge body 1, and every two anti-slip steel plates 3 are attached to each other.

[0030] In order to limit the position of each anti-slip steel plate 3, a first welding plate 4 is symmetrically fixed on one side of the upper end of each anti-slip steel plate 3, and a connecting steel bar 5 is fixed on the side of each first welding plate 4 away from the anti-slip steel plate 3. A positioning nut 6 is movably connected to the outer side of both ends of the connecting steel bar 5. The positioning nut 6 is welded and fixed to the bridge body 1, and it is convenient to flip and open the anti-slip steel plate 3 with the connecting steel bar 5 as the axis, thereby facilitating construction operations.

[0031] When the anti-slip steel plate 3 is closed, in order to facilitate the gripping of the anti-slip steel plate 3, a second welding plate 7 is fixed on the other side of the upper end of each anti-slip steel plate 3. The upper end of the second welding plate 7 is fixed with a lifting lug 8. At the same time, the lifting lug 8 facilitates the handling of the anti-slip steel plate 3. The thickness of the anti-slip steel plate 3 is 5mm, which is convenient for handling.

[0032] Specifically, when installing multiple anti-slip steel plates 3, the multiple anti-slip steel plates 3 are first laid on the upper end of the middle seam 2 in sequence, and the multiple anti-slip steel plates 3 are tightly attached to each other to avoid gaps. After the laying is completed, multiple positioning nuts 6 are slid into the outer side of both ends of multiple connecting steel bars 5, and the positioning nuts 6 are welded and fixed to the bridge body 1, so as to limit the position of the anti-slip steel plates 3, and facilitate the flipping and opening of the anti-slip steel plates 3 with the connecting steel bars 5 as the axis to facilitate construction operations.

[0033] Example 2:

[0034] The protective structure for tunnel construction provided in Example 1 is further optimized, specifically, as follows: Figure 3-4 As shown, in order to protect the outer sides of the two bridge bodies 1, multiple bottom beams 9 are fixed at the bottom of each of the two bridge bodies 1. A bearing base 10 is slidably connected between every two bottom beams 9. The bearing base 10 is located on the outer side of the bridge body 1. A first fastening nut 11 is threaded to the outer side of each bottom beam 9. The first fastening nut 11 fits against the bearing base 10 to fix the bearing base 10. A limit component is provided at the upper end of the bearing base 10. The limit component provides personnel protection and provides basic support strength for the limit component.

[0035] Specifically, the limiting component includes limiting longitudinal rods 15. Each supporting base frame 10 has a limiting longitudinal rod 15 symmetrically fixed at its upper end. Multiple diagonal bracing shafts 16 are evenly fixed between two limiting longitudinal rods 15. When a person collides with a diagonal bracing shaft 16, in order to buffer and weaken the impact force, a plastic sleeve 17 is rotatably connected to the outside of each diagonal bracing shaft 16. A soft rubber pad 18 is fixed to the outside of the plastic sleeve 17.

[0036] To further enhance the connection strength between multiple supporting base frames 10, each supporting base frame 10 is fixed with a positioning post 12 at one of its four corners away from the bridge body 1. An X-shaped prefabricated frame 13 is provided between every two supporting base frames 10. The X-shaped prefabricated frame 13 is slidably connected to the positioning post 12. A second fastening nut 14 is provided at one of the four corners on the outer side of each X-shaped prefabricated frame 13. The second fastening nut 14 fits against the X-shaped prefabricated frame 13 and is threadedly connected to the positioning post 12 to fix the X-shaped prefabricated frame 13.

Claims

1. A protective structure for tunnel construction, comprising two bridge bodies (1), wherein a central joint (2) is provided between the two bridge bodies (1), characterized in that, Multiple anti-slip steel plates (3) are evenly arranged at the upper end of the middle seam (2). The anti-slip steel plates (3) are located at the upper end of the bridge body (1). Each pair of anti-slip steel plates (3) are attached to each other. A first welding plate (4) is symmetrically fixed on one side of the upper end of each anti-slip steel plate (3). A connecting steel bar (5) is fixed on the side of each first welding plate (4) away from the anti-slip steel plate (3). A positioning nut (6) is movably connected to the outer side of both ends of the connecting steel bar (5). The positioning nut (6) is welded and fixed to the bridge body (1). A second welding plate (7) is fixed on the other side of the upper end of each anti-slip steel plate (3). A lifting lug (8) is fixed at the upper end of the second welding plate (7).

2. The protective structure for tunnel construction according to claim 1, characterized in that, Multiple bottom beams (9) are fixed at the bottom ends of both bridge bodies (1), and a bearing base frame (10) is slidably connected between each pair of bottom beams (9). The bearing base frame (10) is located outside the bridge body (1), and a limit component is provided at the upper end of the bearing base frame (10).

3. The protective structure for tunnel construction according to claim 2, characterized in that, Each of the supporting base frames (10) is fixed with a positioning post (12) at one of the four corners of the supporting base frame (10) away from the bridge body (1). An X-shaped prefabricated frame (13) is provided between every two supporting base frames (10). The X-shaped prefabricated frame (13) is slidably connected to the positioning post (12). A second fastening nut (14) is provided at one of the four corners of the outer side of each X-shaped prefabricated frame (13). The second fastening nut (14) fits into the X-shaped prefabricated frame (13). The second fastening nut (14) is threadedly connected to the positioning post (12).

4. The protective structure for tunnel construction according to claim 2, characterized in that, The limiting component includes a limiting longitudinal bar (15), and the upper end of each of the bearing base frames (10) is symmetrically fixed with a limiting longitudinal bar (15), and multiple diagonal bracing shafts (16) are evenly fixed between two of the limiting longitudinal bars (15).

5. The protective structure for tunnel construction according to claim 4, characterized in that, Each of the inclined support shafts (16) is rotatably connected to a plastic sleeve (17), and a soft rubber pad (18) is fixed to the outside of the plastic sleeve (17).

6. The protective structure for tunnel construction according to claim 2, characterized in that, Each of the bottom beam cross columns (9) is threaded with a first fastening nut (11) on its outer side, and the first fastening nut (11) fits against the bearing base frame (10).

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