Tunnel entrance protection structure

Abstract

The utility model discloses a tunnel entrance protection structure, which relates to the technical field of tunnel construction. It comprises a tunnel body, a protection mechanism is fixed at the bottom of the tunnel body, a drainage mechanism is fixed on one side of the protection mechanism, the protection mechanism comprises an arch frame, a guardrail is fixed on the top of the arch frame, an arc groove is provided on one side of the guardrail, an inclined surface is provided on one side of the arch frame, a plurality of springs are fixed on the inclined surface of the arch frame, a rubber pad is fixed on one end of the plurality of springs, and the bottom two sides of the rubber pad are fixed to the inclined surface of the arch frame. The utility model increases the guardrail and the arc groove inside through the setting of the protection mechanism, when stones roll down at the tunnel entrance, the guardrail can block it, and under the action of the arc groove, the impact direction of the stones or landslide can be changed, the impact force on the guardrail can be weakened, the safety hazard of vehicles entering the tunnel is reduced, and the service life of the device is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel opening protection structure. Background Art

[0002] During the tunnel construction process, it is necessary to build a protective structure for the tunnel entrance, so a tunnel entrance protection structure is needed.

[0003] For example, the tunnel entrance protection structure with patent publication number CN220226883U drains surface water on a large scale through intercepting ditches and drains deep water through drainage holes on the upper ditch wall, forming a multiple drainage structure and quickly draining the water into the collection channel through the drainage ditches.

[0004] However, in the actual use of the above-mentioned tunnel entrance protection structure, in some areas, the rainfall is too heavy, and the soil on the top of the tunnel entrance can easily become loose under the erosion of rainwater, causing the stones in the soil to slide. The device cannot block the stones well, which increases the safety hazard of vehicles entering the tunnel. For this reason, the applicant proposed a tunnel entrance protection structure. Utility Model Content

[0005] The purpose of the utility model is to provide a tunnel entrance protection structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tunnel entrance protection structure, including a tunnel body, a protection mechanism is fixed to the bottom of the tunnel body, a drainage mechanism is fixed to one side of the protection mechanism, the protection mechanism includes an arch frame, a guardrail is fixed to the top of the arch frame, an arc groove is provided on one side of the guardrail, an inclined surface is provided on one side of the arch frame, a plurality of springs are fixed to the inclined surface of the arch frame, a rubber pad is fixed to one end of the plurality of springs, and the two sides of the bottom of the rubber pad are fixed to the two sides of the inclined surface of the arch frame.

[0007] Preferably, a plurality of telescopic rods are fixed to the inclined surface of the arch frame, and the plurality of telescopic rods are respectively located inside a plurality of springs.

[0008] Preferably, a connecting frame is fixed on one side of the arch frame, a supporting frame is fixed on one side of the connecting frame, the top of the supporting frame is fixed to the bottom of the tunnel body, and a plurality of fixing rods are fixed on one side of the arch frame, and the tops of the plurality of fixing rods are fixed together to the connecting frame and the bottom of the supporting frame.

[0009] Preferably, support blocks are fixed to one side of the two brackets of the arch frame and the two brackets of the guardrail respectively.

[0010] Preferably, the length of the rubber pad is greater than the circumference of the arc surface of the arch frame, and the length of the fixing rod is equal to the sum of the widths of the connecting frame and the supporting frame.

[0011] Preferably, the drainage mechanism comprises a rainproof frame, a plurality of drainage grooves are provided on the top of the rainproof frame, absorbent cotton is fixed on both sides of the inner walls of the plurality of drainage grooves, and the top of the absorbent cotton is configured to be corrugated.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The tunnel entrance protection structure has added guardrails and arc grooves through the setting of protection mechanisms. When stones roll down at the tunnel entrance, the guardrails can block them, and under the action of the arc grooves, the impact direction of the stones or landslides can be changed, reducing the impact force on the guardrails, reducing the safety hazards of vehicles entering the tunnel, and increasing the service life of the device.

[0014] At the same time, springs and rubber pads are installed in the protective mechanism. When stones roll down at the tunnel entrance, the interaction between the springs and the rubber pads can offset the impact force of the stones or landslides. Under the action of the spring rebound, the surface of the rubber pads can shake, allowing the stones to slide along the curved surface of the device, further reducing the safety hazards of vehicles entering the tunnel and improving the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the top structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the protection mechanism structure of the utility model;

[0018] Figure 4 for Figure 3 A partial enlarged view of part A;

[0019] Figure 5 It is a schematic diagram of the drainage mechanism structure of the utility model.

[0020] In the figure: 1. Tunnel body; 2. Protection mechanism; 201. Arch frame; 202. Guardrail; 203. Arc groove; 204. Spring; 205. Rubber pad; 206. Telescopic rod; 207. Connecting frame; 208. Support frame; 209. Fixed rod; 210. Support block; 3. Drainage mechanism; 301. Rainproof frame; 302. Drainage trough; 303. Water-absorbent cotton. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] As an important passage in and out of the tunnel, effective protection measures need to be taken during the construction process to ensure the safe entry and exit of vehicles and the safety and stability of the tunnel. Therefore, a tunnel entrance protection structure is needed. In actual use, most traditional tunnel entrance protection structures will lay cement on the slope of the entrance to prevent stones from falling or landslides. However, cement laying has certain limitations. For some areas not covered by cement, under the erosion of rainwater, it may fall along the cement slope to the entrance, increasing the safety hazard of vehicles. For this reason, the applicant proposed a tunnel entrance protection structure.

[0023] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: a tunnel entrance protection structure, including a tunnel body 1, a protection mechanism 2 is fixed at the bottom of the tunnel body 1, a drainage mechanism 3 is fixed on one side of the protection mechanism 2, the protection mechanism 2 includes an arch frame 201, a guardrail 202 is fixed on the top of the arch frame 201, a curved groove 203 is provided on one side of the guardrail 202, an inclined surface is provided on one side of the arch frame 201, a plurality of springs 204 are fixed on the inclined surface of the arch frame 201, a rubber pad 205 is fixed on one end of the plurality of springs 204, the two sides of the bottom of the rubber pad 205 are fixed to the two sides of the inclined surface of the arch frame 201, a plurality of telescopic rods 206 are fixed on the inclined surface of the arch frame 201, and a plurality of telescopic rods 206 are fixed on the inclined surface of the arch frame 201. The retractable rods 206 are respectively located inside the plurality of springs 204, a connecting frame 207 is fixed on one side of the arch frame 201, a supporting frame 208 is fixed on one side of the connecting frame 207, the top of the supporting frame 208 is fixed to the bottom of the tunnel body 1, a plurality of fixing rods 209 are fixed on one side of the arch frame 201, the tops of the plurality of fixing rods 209 are fixed together with the connecting frame 207 and the bottom of the supporting frame 208, support blocks 210 are respectively fixed on one side of the two brackets of the arch frame 201 and the two brackets of the guardrail 202, the length of the rubber pad 205 is greater than the circumference of the arc surface of the arch frame 201, and the length of the fixing rod 209 is equal to the sum of the widths of the connecting frame 207 and the supporting frame 208.

[0024] It should be noted that: during the use of the device, when stones roll down at the tunnel entrance, the rubber pad 205 will first contact the stones, and under the action of the spring 204, a part of the impact force of the stones will be offset. Subsequently, the guardrail 202 will also block the stones, and under the action of the arc groove 203, the rolling trajectory of the stones will change, reducing the impact force of the stones directly on the guardrail 202. Then, during the rebound of the spring 204, the surface of the rubber pad 205 will shake, causing the stones to slide along the arc surface of the device. During this process, the support frame 208 can support the tunnel body 1, and under the action of several fixing rods 209, the stability of the support frame 208 is ensured. At the same time, the arch frame 201 bears the pressure applied by several fixing rods 209 and the guardrail 202. At this time, the arch frame 201 will transfer the pressure to the support block 210, and the support block 210 will transfer the pressure to the ground, so that the arch frame 201 can be more stable.

[0025] like Figure 5 As shown, the utility model provides a technical solution: a tunnel entrance protection structure, including a drainage mechanism 3, the drainage mechanism 3 includes a rainproof frame 301, a plurality of drainage grooves 302 are opened on the top of the rainproof frame 301, absorbent cotton 303 is fixed on both sides of the inner wall of the plurality of drainage grooves 302, and the top of the absorbent cotton 303 is set to be corrugated.

[0026] It should be noted that: when the device is in use and encounters rainy weather, rainwater that penetrates into the surface will be absorbed by the absorbent cotton 303. Since the top of the absorbent cotton 303 is configured to be corrugated, the water absorption area of ​​the absorbent cotton 303 can be increased. When the saturation of the absorbent cotton 303 reaches full, the water in the absorbent cotton 303 will drip into the drainage trough 302 under the action of gravity, which can prevent the drainage trough 302 from reducing the water flow rate due to mud and sand, and the water in the drainage trough 302 can be discharged under the curvature of the rainproof frame 301.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A tunnel portal protection structure, comprising a tunnel body (1), characterized in that: A protection mechanism (2) is fixed at the bottom of the tunnel body (1), a drainage mechanism (3) is fixed on one side of the protection mechanism (2), the protection mechanism (2) comprises an arch frame (201), a guardrail (202) is fixed on the top of the arch frame (201), a curved groove (203) is provided on one side of the guardrail (202), an inclined surface is provided on one side of the arch frame (201), a plurality of springs (204) are fixed on the inclined surface of the arch frame (201), a rubber pad (205) is fixed at one end of the plurality of springs (204), and two sides of the bottom of the rubber pad (205) are fixed to two sides of the inclined surface of the arch frame (201).

2. The tunnel entrance protection structure according to claim 1, characterized in that: A plurality of telescopic rods (206) are fixed to the inclined surface of the arch frame (201), and the plurality of telescopic rods (206) are respectively located inside the plurality of springs (204).

3. The tunnel entrance protection structure according to claim 1, characterized in that: A connecting frame (207) is fixed on one side of the arch frame (201), a supporting frame (208) is fixed on one side of the connecting frame (207), the top of the supporting frame (208) and the bottom of the tunnel body (1) are fixed to each other, and a plurality of fixing rods (209) are fixed on one side of the arch frame (201), the tops of the plurality of fixing rods (209) are fixed to the connecting frame (207) and the bottom of the supporting frame (208).

4. The tunnel entrance protection structure according to claim 1, characterized in that: Support blocks (210) are respectively fixed on one side of the two brackets of the arch frame (201) and the two brackets of the guardrail (202).

5. The tunnel entrance protection structure according to claim 3 is characterized in that: The length of the rubber pad (205) is greater than the circumference of the arc surface of the arch frame (201), and the length of the fixing rod (209) is equal to the sum of the widths of the connecting frame (207) and the supporting frame (208).

6. The tunnel entrance protection structure according to claim 1, characterized in that: The drainage mechanism (3) comprises a rainproof frame (301), a plurality of drainage grooves (302) are provided on the top of the rainproof frame (301), absorbent cotton (303) is fixed on both sides of the inner walls of the plurality of drainage grooves (302), and the top of the absorbent cotton (303) is arranged in a corrugated shape.

Images