Tunnel shotcreting anti-springback device
By designing a rebound prevention device for shotcrete in tunnels, the rebound problem in shotcrete in tunnels was solved, achieving effective adhesion of concrete and safe construction.
Patent Information
- Application Number
- CN202520128326.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-20
AI Technical Summary
During the shotcrete process in tunnels, some concrete fails to adhere effectively to the sprayed surface and falls off, resulting in material waste and excessive dust at the construction site, threatening the health of construction workers.
A tunnel shotcrete anti-rebound device was designed, including a front plate, a catch plate, and a spraying device. Through a sliding device and a positioning device, the concrete first adheres to the adjacent wall and then to the catch plate and catch plate, and finally to the equipment. The concrete is connected to the spraying pipe through a concrete pipe, thus achieving effective adhesion of the concrete and remediation of rebound.
It effectively reduces concrete rebound, lowers construction costs and dust pollution, and improves construction safety.
Smart Images
Figure CN223661846U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel concrete spraying technology, specifically a tunnel concrete spraying anti-rebound device. Background Technology
[0002] Concrete is a composite material made by mixing cementitious materials, aggregates, and water in appropriate proportions and then hardening it over a certain period of time. This material is widely used in civil engineering and is favored for its unique performance and economic benefits. Its basic components include cementitious materials, aggregates, water, and admixtures. It is used in the construction of large structures such as bridges, tunnels, and dams; in the construction of buildings such as buildings and factories; in the construction of infrastructure such as highways, railways, and airport runways; and in the construction of water conservancy facilities such as dams, canals, and reservoirs.
[0003] In the prior art, the rebound of shotcrete in tunnels refers to the phenomenon that some concrete fails to adhere effectively to the sprayed surface and falls off during the shotcrete process due to various reasons. This phenomenon not only wastes raw materials and increases construction costs, but also leads to excessive dust content in the air at the construction site, threatening the health and safety of construction workers. Therefore, we propose a shotcrete anti-rebound device for tunnels. Utility Model Content
[0004] The purpose of this utility model is to provide a tunnel shotcrete anti-rebound device to solve the problems existing in the prior art as described in the background.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A tunnel shotcrete anti-rebound device includes a front plate, a shotcrete device is installed through the side wall of the front plate, a pocket plate is installed at the bottom of the front plate and the pocket plate is connected to the front plate by a sliding device, two threaded grooves are installed through the upper end of the front plate and positioning devices are threaded through the two threaded grooves, a connecting frame is installed at the rear side of the front plate, the front plate and the side wall of the connecting frame are connected by two fixing frames, and two connecting bolts are installed through the side wall of the connecting frame.
[0007] Preferably, the spraying device includes multiple through slots disposed through the side wall of the front plate, each of the multiple through slots being provided with a spraying pipe, and a concrete pipe disposed at the rear side of the front plate, the concrete pipe being connected to the multiple spraying pipes.
[0008] Preferably, the sliding device includes a tail plate fixedly connected to the back side of the front plate, a plurality of sliding columns fixedly connected to the side wall of the tail plate, and a plurality of sliding grooves through the side wall of the pocket plate at the corresponding position, wherein the plurality of sliding columns are slidably connected in the sliding grooves at the corresponding positions.
[0009] Preferably, the positioning device includes a fixing screw that is threaded through and connected in a threaded groove, the tail end of which passes through the lower end of the front plate and abuts against the side wall of the pocket plate.
[0010] Preferably, the width of the flap is equal to that of the front panel.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] In this invention, by setting up a spraying device, a positioning device, and a sliding device to cooperate with each other, a front plate and a catch plate are designed at the spraying pipe. The sprayed concrete slurry first adheres to the tunnel rock wall, and the concrete slurry that slides down is caught by the catch plate. The catch plate can be lifted by existing mechanical means to achieve secondary adhesion and continuous contact adhesion. This can remedy rebounding concrete and prevent it from falling directly to the bottom. The length of the catch plate at the bottom can be adjusted to accommodate different spraying distances. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a tunnel shotcrete anti-rebound device proposed in this utility model;
[0014] Figure 2 This is a schematic diagram of the bottom structure of the sump plate of the anti-rebound device for shotcrete in tunnels proposed in this utility model.
[0015] Figure 3 This is a schematic diagram of the front plate structure of a tunnel shotcrete anti-rebound device proposed in this utility model.
[0016] In the diagram: 1. Cover plate, 2. Front plate, 3. Spray pipe, 4. Fixing screw, 5. Concrete pipe, 6. Connecting frame, 7. Connecting bolt, 8. Fixing frame, 9. Tail plate, 10. Sliding column. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0018] Reference Figure 1-3 A tunnel shotcrete anti-rebound device includes a front plate 2, a spraying device is provided through the side wall of the front plate 2, the spraying device includes multiple through slots provided through the side wall of the front plate 2, each of the multiple through slots is provided with a spraying pipe 3, and a concrete pipe 5 is provided at the rear side of the front plate 2, the concrete pipe 5 is connected to the multiple spraying pipes 3.
[0019] The front plate 2 has a pocket plate 1 at its lower part. The pocket plate 1 has the same width as the front plate 2. The pocket plate 1 is connected to the front plate 2 through a sliding device. The sliding device includes a tail plate 9 fixedly connected to the back side of the front plate 2. Multiple sliding pins 10 are fixedly connected to the side wall of the tail plate 9. Multiple sliding grooves are provided through the side wall of the pocket plate 1 at the corresponding position. The multiple sliding pins 10 are slidably connected in the sliding grooves at the corresponding positions.
[0020] Specifically, two threaded grooves are provided through the upper end of the front plate 2, and positioning devices are threadedly connected in both threaded grooves. The positioning devices include fixing screws 4 that are threadedly connected in the threaded grooves. The tail end of the fixing screws 4 passes through the lower end of the front plate 2 and abuts against the side wall of the pocket plate 1. A connecting frame 6 is provided on the rear side of the front plate 2. The front plate 2 and the side wall of the connecting frame 6 are connected by two fixing frames 8. Two connecting bolts 7 are provided through the side wall of the connecting frame 6.
[0021] In this invention, the operator connects the device to the existing related spraying machinery through the connecting bolts 7 and the connecting frame 6, and sprays concrete slurry onto the tunnel rock wall through the concrete pipe 5 and multiple spray pipes 3. The rebounding concrete is caught by the catch plate 1 and continues to adhere to the rock wall through the up and down displacement of the machinery, preventing it from falling to the bottom.
[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A tunnel shotcrete anti-rebound device, comprising a front plate (2), characterized in that, A spraying device is provided through the side wall of the front plate (2). A pocket plate (1) is provided at the bottom of the front plate (2). The pocket plate (1) is connected to the front plate (2) through a sliding device. Two threaded grooves are provided through the upper end of the front plate (2). A positioning device is threaded through each of the two threaded grooves. A connecting frame (6) is provided at the rear side of the front plate (2). The front plate (2) and the side wall of the connecting frame (6) are connected by two fixing frames (8). Two connecting bolts (7) are provided through the side wall of the connecting frame (6).
2. The anti-rebound device for shotcrete in tunnels according to claim 1, characterized in that, The spraying device includes multiple through slots that are disposed through the side wall of the front plate (2), and each of the multiple through slots is provided with a spraying pipe (3). A concrete pipe (5) is provided at the rear side of the front plate (2), and the concrete pipe (5) is connected to the multiple spraying pipes (3).
3. The anti-rebound device for shotcrete in tunnels according to claim 1, characterized in that, The sliding device includes a tail plate (9) fixedly connected to the back side of the front plate (2). Multiple sliding columns (10) are fixedly connected to the side wall of the tail plate (9). Multiple sliding grooves are provided through the side wall of the pocket plate (1) at the corresponding position. The multiple sliding columns (10) are slidably connected in the sliding grooves at the corresponding positions.
4. The anti-rebound device for shotcrete in tunnels according to claim 1, characterized in that, The positioning device includes a fixing screw (4) that is threaded through and connected in a threaded groove. The tail end of the fixing screw (4) passes through the lower end of the front plate (2) and abuts against the side wall of the pocket plate (1).
5. A tunnel shotcrete anti-rebound device according to claim 1, characterized in that, The width of the flap (1) is equal to that of the front plate (2).