Multi-arch tunnel portal blasting flying stone prevention protection device

Abstract

The utility model provides a multi-arch tunnel portal blasting anti-flying-stone protection device which comprises a fixing plate and a rectangular main frame, a plurality of installation frames are formed in the main frame in a separated mode through cross beams and vertical beams which are arranged in a staggered mode, baffles are arranged in the installation frames, buffer layers are arranged on the front sides of the baffles, and a protection bent frame is arranged above the main frame. The protective bent frame comprises a rectangular plate and a buffer layer arranged on the front side of the rectangular plate, a top baffle horizontally arranged in the longitudinal direction is arranged above the rectangular plate, and the front end of the top baffle is connected with a cover arch; by arranging the main frame and the protective bent frame, flying rocks generated by blasting can be effectively intercepted, and the impact of the flying rocks on the surrounding environment is greatly reduced; and the buffer layer is arranged in front of the main frame and the protective bent frame, so that part of shock wave energy can be buffered, the impact force of flying stones on the steel plate frame is reduced, the service life of the protective device is prolonged, the risk of accidents such as hole collapse caused by blasting is reduced, and reliable safety guarantee is provided for tunnel hole blasting construction.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel construction, and in particular to a protective device against flying rocks during blasting at the entrance of a continuous arch tunnel. Background Technology

[0002] The newly constructed arch tunnel is located between existing tunnels. The terrain at the tunnel entrance and in the surrounding area is quite complex, with residential buildings, existing highways, maintenance stations, and other structures. If an accidental flying rock or shock wave occurs during blasting operations, it could easily cause serious damage to the surrounding area and endanger the lives and property of people.

[0003] Traditional blasting methods are difficult to effectively control the blasting hazard range at the tunnel entrance. Flying rocks travel long distances and are difficult to predict in direction. Existing blasting protection equipment for tunnel entrances has a complex structure and is not easy to disassemble and assemble, resulting in low utilization rate and less than ideal performance in terms of protection. Utility Model Content

[0004] This utility model aims to provide a protective device for preventing flying rocks during blasting at the entrance of a continuous arch tunnel. It can intercept flying rocks generated by blasting, buffer some of the shock wave energy, reduce the impact of flying rocks on the surrounding environment, reduce the impact on the stability of the surrounding rock at the tunnel entrance, and prevent the tunnel entrance from collapsing due to blasting.

[0005] Therefore, the technical solution adopted by this utility model is as follows: a protective device for preventing flying rocks during blasting at the entrance of a continuous arch tunnel, comprising a fixed plate arranged parallel to the horizontal plane and a rectangular main frame arranged horizontally and vertically above the fixed plate in the middle. Multiple installation frames are formed within the main frame by staggered horizontal and vertical beams. A baffle is provided within each installation frame, and a buffer layer is provided in front of the baffle. A protective frame is provided above the main frame, and the protective frame includes a rectangular plate and a buffer layer provided in front of the rectangular plate. A top baffle is provided between the rectangular plate and the tunnel arch, and the top baffle is combined with the main frame and the protective frame to seal the tunnel entrance.

[0006] As a preferred embodiment of the above solution, the buffer layer includes a bamboo plywood and a rubber pad, wherein the rubber pad is fixed to the bamboo plywood with steel nails, and the bamboo plywood is fixed to the baffle with bolts.

[0007] A further preferred embodiment is that the main frame is provided with lifting rings on the left and right sides of the top.

[0008] More preferably, the main frame is connected to the protective frame, the protective frame is connected to the top baffle, and the top baffle is connected to the arch via a pin structure.

[0009] A further preferred embodiment is that a traveling wheel is provided below the fixed plate, and the traveling wheel is equipped with a locking block to prevent the traveling wheel from slipping.

[0010] A further preferred embodiment is that the rear side of the main frame is provided with a diagonal brace that is connected to the fixing plate.

[0011] More preferably, the baffle is made of a 2cm thick steel plate.

[0012] The beneficial effects of this utility model are as follows: by setting up a main frame and a protective frame, the flying rocks generated by blasting can be effectively intercepted, greatly reducing the impact of flying rocks on the surrounding environment; and a buffer layer is set in front of the main frame and the protective frame, which can buffer part of the shock wave energy, reduce the impact force of flying rocks on the steel plate frame, extend the service life of the protective device, reduce the risk of accidents such as tunnel entrance collapse caused by blasting, and provide reliable safety guarantee for tunnel entrance blasting construction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation structure of this utility model. Figure 1 .

[0014] Figure 2 This is a schematic diagram of the installation structure of this utility model. Figure 2 .

[0015] Figure 3 This is a schematic diagram of the structure of the rubber pad in this utility model.

[0016] Figure 4 This is a schematic diagram of the main frame structure in this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-4 As shown, a protective device for preventing flying rocks during blasting at the entrance of a multi-arch tunnel includes a fixed plate 1 parallel to the horizontal plane and a rectangular main frame 2 horizontally and vertically positioned above the fixed plate 1 in the middle. The fixed plate 1 and the main frame 2 are welded together to form an integral frame. A traveling wheel 9 is provided below the fixed plate 1, and the traveling wheel 9 is equipped with a locking block 10 to prevent slippage. The position of the fixed plate 1 is adjusted using the traveling wheel 9, and after adjustment, the fixed plate 1 is fixed by the locking block 10. The front side of the main frame 2 (i.e., the side with the buffer layer 4) faces the tunnel entrance. Lifting rings 8 are provided on the left and right sides of the top of the main frame 2 for hoisting. The lifting rings 8 are connected to hoisting equipment to facilitate the movement and installation of the main frame 2.

[0019] A diagonal brace 11, connected to the fixed plate 1, is installed on the rear side of the main frame 2. The diagonal brace 11 connects the main frame 2 and the fixed plate 1, ensuring the overall structural strength and improving the resistance to deformation. Multiple mounting frames are formed inside the main frame 2 by staggered horizontal and vertical beams. A baffle 3, made of 2cm thick steel plate, is installed inside the mounting frame. The horizontal and vertical beams welded to the main frame 2 enhance the overall structural strength, and the baffle 3, made of 2cm thick steel plate, is welded inside the mounting frame as rigid protection for the device. A buffer layer 4 is installed in front of the baffle 3. The buffer layer 4 includes bamboo plywood and rubber pads. The rubber pads are fixed to the bamboo plywood with steel nails, and the bamboo plywood is fixed to the baffle 3 with bolts. The rubber pads adopt a blast protection shell structure (this is existing technology and will not be described in detail here) as flexible protection for the device.

[0020] Using bamboo plywood and rubber pads as flexible protection, the rubber pads have a smooth surface, are not easily worn or damaged, and have good impact resistance and flexibility. The buffer layer 4 is cut according to the size of the tunnel. The cut rubber pads are interlocked according to the structure of the blast protection blasting ...

[0021] The rigid protection consists of baffle 3, crossbeams, vertical beams, and main frame 2, serving as the last line of defense against the impact of blasting. The main frame 2, as well as the crossbeams and vertical beams, are all made of I-beams. A 2cm thick steel plate is welded inside the frame to ensure the overall strength of the frame. Based on the cross-sectional dimensions of the tunnel entrance, the overall frame (main frame 2 and baffle 3) is welded using I-beams and steel plates. Then, hoisting equipment is used to lift the overall frame to the designated location and adjust its specific position.

[0022] The sides of the overall frame also feature multiple sets of pin structures (existing technology) for connecting two frames. If the tunnel opening is too large, multiple frames can be connected together to cover the opening. This includes two mating pin seats, installed on the left and right side walls of the frame. Each pin seat has a pin hole. Two adjacent frames are placed together, and the pin seats closest to each other are engaged before inserting the pins. This completes the installation of multiple sets of pin seats. After installation, a suitable amount of wood glue or metal glue can be applied to ensure connection stability. The frame can be connected via the pin structure, facilitating frame manufacturing. In use, multiple frames can be connected according to the tunnel opening size, resulting in better adaptability.

[0023] A protective frame 5 is installed above the main frame 2. The protective frame 5 includes a rectangular plate and a buffer layer 4 located in front of the rectangular plate. A top baffle 6 is installed between the rectangular plate and the tunnel arch 7. The top baffle 6 is combined with the main frame 2 and the protective frame 5 to seal the tunnel entrance. The main frame 2 and the protective frame 5, the protective frame 5 and the top baffle 6, and the top baffle 6 and the tunnel arch 7 are all connected by multiple sets of pin structures. The protective frame 5 and the top baffle 6 are installed above the main frame 2 to protect the upper gap between the tunnel arch 7 and the main frame 2.

[0024] By setting up the main frame 2 and the protective frame 5, the flying rocks generated by the blasting can be effectively intercepted, greatly reducing the impact of flying rocks on the surrounding environment; and a buffer layer 4 is set in front of the main frame 2 and the protective frame 5, which can buffer part of the shock wave energy, reduce the impact force of flying rocks on the steel plate frame, extend the service life of the protective device, reduce the risk of accidents such as tunnel entrance collapse caused by blasting, and provide reliable safety guarantee for tunnel entrance blasting construction.

[0025] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A protective device for preventing flying rocks during blasting at the entrance of a multi-arch tunnel, characterized in that: The utility model relates to a tunnel entrance sealing device, which comprises a fixed plate (1) arranged in parallel with the horizontal plane and a rectangular main frame (2) arranged vertically above the middle of the fixed plate (1), a plurality of mounting frames are formed in the main frame (2) by the staggered arrangement of cross beams and vertical beams, a baffle (3) is arranged in the mounting frame, a buffer layer (4) is arranged on the front side of the baffle (3), a protective row frame (5) is arranged above the main frame (2), the protective row frame (5) comprises a rectangular plate and a buffer layer (4) arranged on the front side of the rectangular plate, a top baffle (6) is arranged between the top of the rectangular plate and a tunnel sleeve arch (7), and the top baffle (6) is combined with the main frame (2) and the protective row frame (5) to seal the tunnel entrance.

2. The flying stone protection device for multi-arch tunnel portal blasting according to claim 1, characterized in that: The buffer layer (4) comprises a bamboo plywood and a rubber pad, the rubber pad is fixed on the bamboo plywood by steel nails, and the bamboo plywood is fixed on the baffle (3) by bolts.

3. The flying stone protection device for the portal blasting of the multi-arch tunnel according to claim 1, characterized in that: The main frame (2) is provided with lifting rings (8) on the left and right sides of the top for lifting.

4. The flying stone protection device for multi-arch tunnel portal blasting according to claim 1, characterized in that: The main frame (2) and the protective row frame (5), the protective row frame (5) and the top baffle (6), and the top baffle (6) and the sleeve arch (7) are connected by a bolt structure.

5. The flying stone protection device for multi-arch tunnel portal blasting according to claim 1, characterized in that: The fixed plate (1) is provided below with walking wheels (9) which are provided with locking blocks (10) for preventing the walking wheels (9) from sliding.

6. The flying stone protection device for multi-arch tunnel portal blasting according to claim 5, characterized in that: The main frame (2) is provided on the rear side with an inclined strut (11) connected with the fixed plate (1).

7. The flying stone protection device for multi-arch tunnel portal blasting according to claim 1, characterized in that: The baffle (3) is made of a 2cm-thick steel plate.

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