A highway tunnel portal rockfall buffering protection structure

Abstract

The utility model discloses a highway tunnel portal anti-rockfall buffer protection structure, including ground stake, the top fixedly connected with support plate of ground stake, the top fixedly connected with arch wall of support plate, the top of arch wall is provided with buffer device, and buffer device includes protection board, riser, connecting plate, buffer board and L type board, the outer wall top of protection board is attached to arch wall, and the bottom of the side of protection board outer wall is attached to the L type board away from arch wall. The utility model relates to the technical field of highway tunnel portal anti-rockfall, and this highway tunnel portal anti-rockfall buffer protection structure realizes the effect that buffer board plays the damping effect when buffer protection structure is impacted by rockfall through the cooperation between protection board, riser, buffer board and L type board, solves the problem that the buffer protection structure of current buffer protection structure is limited when suffering greater impact force, and the buffer and shock attenuation capacity are limited, and the buffer protection structure is relatively complex, and the construction cost is higher.

Description

Technical Field

[0001] This utility model relates to the field of rockfall prevention technology for highway tunnel entrances, specifically a rockfall prevention buffer protection structure for highway tunnel entrances. Background Technology

[0002] Open-cut tunnels serve as a primary means of buffering and protecting highway tunnel entrances from falling rocks, and are sometimes also an effective method for addressing road cut defects such as rockfalls and landslides. Many railways in China, especially those in mountainous areas, have constructed numerous open-cut tunnels of various types, which have proven effective in mitigating road cut defects and ensuring operational safety.

[0003] Existing rockfall prevention and buffer protection structures at highway tunnel entrances generally use their own robust reinforced concrete structures to intercept, buffer, and block falling rocks.

[0004] However, existing rockfall protection structures at highway tunnel entrances have limited buffering and shock absorption capabilities when subjected to large impacts, which may cause significant damage or even destruction to the structures. Furthermore, these structures are complex, requiring large amounts of building materials and advanced construction techniques, resulting in high construction costs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a rockfall prevention buffer protection structure for highway tunnel entrances. This solves the problems that existing rockfall prevention buffer protection structures for highway tunnel entrances have limited buffering and shock absorption capabilities when subjected to large impact forces, which may lead to significant damage or even destruction of the structure. Furthermore, these structures are relatively complex, requiring a large amount of building materials and advanced construction techniques, resulting in high construction costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rockfall prevention and buffer protection structure for highway tunnel entrances, comprising an arch wall, a support plate fixedly connected to the bottom of the arch wall, a buffer device provided above the support plate, the buffer device comprising a protective plate, a vertical plate, a connecting plate, a buffer plate, and an L-shaped plate, the protective plate being disposed on the top of the outer wall of the arch wall, the bottom of the outer wall of the protective plate being fitted with an L-shaped plate, the L-shaped plate being fixedly connected to the bottom of the outer wall of the arch wall, the bottom of the protective plate being fixedly connected to a vertical plate, the bottom of the outer wall of the vertical plate being sleeved with a connecting plate, the connecting plate being fixedly connected between the arch wall and the L-shaped plate, and a buffer plate being fixedly connected between the bottom of the protective plate and the top of the connecting plate.

[0007] Preferably, a splicing device is provided above the ground pile. The splicing device includes a first horizontal plate, a first bolt, a splicing plate, and a second bolt. The first horizontal plate is fixedly connected to the back of the support plate. A first bolt is provided on one side of the first horizontal plate. The first bolt passes through the support plate and is threaded to the inner wall of the support plate. A splicing plate is provided above the first bolt. The splicing plate is attached to the outer wall of the L-shaped plate. A second bolt is threaded to the inner wall of the L-shaped plate. The second bolt passes through the splicing plate and the L-shaped plate in sequence.

[0008] Preferably, a top plate is fixedly connected to the top of the protective plate, and the top of the top plate has an inclined surface.

[0009] Preferably, a second horizontal plate is fixedly connected to the back of the top plate, and a third bolt is provided on one side of the second horizontal plate. The third bolt passes through the top plate and is threaded to the inner wall of the top plate.

[0010] Preferably, a ground pile is fixedly connected to the bottom of the support plate, and a pile tip is fixedly connected to the bottom of the ground pile.

[0011] Beneficial effects

[0012] This utility model provides a rockfall prevention and buffer protection structure for highway tunnel entrances. It has the following beneficial effects: Through the cooperation of protective plates, vertical plates, connecting plates, buffer plates, and L-shaped plates, this structure achieves a damping effect when the tunnel entrance is impacted by falling rocks. The protective plates drive the vertical plates to move, and the buffer plates undergo elastic deformation under compression. This solves the problem that existing rockfall prevention and buffer protection structures have limited buffering and shock absorption capabilities when subjected to large impacts, potentially leading to significant damage or even destruction. Furthermore, these structures are often complex, requiring large amounts of building materials and advanced construction techniques, resulting in high construction costs.

[0013] By coordinating the first horizontal plate, the first bolt, the splicing plate, and the second bolt, the construction workers can calculate the required length of the rockfall prevention buffer protection structure at the entrance of the highway tunnel based on the actual situation. The support plate is spliced ​​using the first horizontal plate and the first bolt, and the L-shaped plate is spliced ​​using the splicing plate and the second bolt. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 An exterior schematic diagram;

[0016] Figure 3 for Figure 2 A diagram illustrating the assembly process;

[0017] Figure 4 for Figure 3 A sectional view;

[0018] Figure 5 for Figure 1 A schematic diagram of the structure of the second bolt, the L-shaped plate, and the second support plate.

[0019] In the diagram: 1. Ground pile; 2. Support plate; 3. Arch wall; 4. Protective plate; 5. Vertical plate; 6. Connecting plate; 7. Buffer plate; 8. Pile tip; 9. L-shaped plate; 10. First horizontal plate; 11. First bolt; 12. Splicing plate; 13. Second bolt; 14. Top plate; 15. Second horizontal plate; 16. Third bolt; 17. Sloping surface. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Existing rockfall protection structures at highway tunnel entrances have limited buffering and shock absorption capabilities when subjected to significant impacts, which may cause substantial damage or even destruction to these structures. Furthermore, these structures are complex, requiring large quantities of building materials and advanced construction techniques, resulting in high construction costs.

[0022] In view of this, the present invention provides a rockfall prevention and buffer protection structure for highway tunnel entrances. This structure, through the cooperation of a protective plate, a vertical plate, a connecting plate, a buffer plate, and an L-shaped plate, achieves a damping effect when the structure is impacted by falling rocks. The protective plate moves the vertical plate, and the buffer plate undergoes elastic deformation under compression. This solves the problem that existing rockfall prevention and buffer protection structures for highway tunnel entrances have limited buffering and shock absorption capabilities when subjected to large impacts, potentially leading to significant damage or even destruction. Furthermore, these structures are complex, requiring large amounts of building materials and advanced construction techniques, resulting in high construction costs.

[0023] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly introduced below.

[0024] Example 1, by Figure 1-5 It is understood that the rockfall prevention buffer structure at the entrance of a highway tunnel in this case includes an arch wall 3. A support plate 2 is fixedly connected to the bottom of the arch wall 3. The arch wall 3 is made of steel frame reinforced concrete, ensuring the overall stability and robustness of the arch wall 3, and guaranteeing its overall support capacity and strength. During the casting process of the arch wall 3, a portion of the L-shaped plate 9 is inserted into the interior of the arch wall 3. After the arch wall 3 cools, the L-shaped plate 9 is fixedly connected to the surface of the arch wall 3. A buffer device is installed above the support plate 2. The buffer device includes a protective plate 4, a vertical plate 5, a connecting plate 6, a buffer plate 7, and the L-shaped plate 9. The protective plate 4 is located on the top of the outer wall of the arch wall 3. The entire material is made of glass fiber reinforced concrete to ensure the overall hardness and impact resistance of the protective plate 4. An L-shaped plate 9 is attached to the bottom of the outer wall of the protective plate 4 away from the arch wall 3. The L-shaped plate 9 is fixedly connected to the bottom of the outer wall of the arch wall 3. A vertical plate 5 is fixedly connected to the bottom of the protective plate 4. A connecting plate 6 is sleeved on the bottom of the outer wall of the vertical plate 5. The connecting plate 6 is fixedly connected between the arch wall 3 and the L-shaped plate 9. During the casting process of the arch wall 3, part of the connecting plate 6 is first inserted into the cement of the arch wall 3. After the arch wall 3 cools, the connecting plate 6 is fixedly connected to the outer wall of the arch wall 3 by cement. A buffer plate 7 is fixedly connected between the bottom of the protective plate 4 and the top of the connecting plate 6.

[0025] In the specific implementation process, it is worth noting that through the cooperation between the protective plate 4, the upright plate 5, the connecting plate 6, and the buffer plate 7, when the rockfall protection structure at the entrance of the highway tunnel is impacted by falling rocks, the protective plate 4 drives the upright plate 5 to move downwards, the connecting plate 6 supports the buffer plate 7, and the buffer plate 7 buffers the impact force, thereby achieving the effect of shock absorption. The buffer plate 7 is made of rubber, ensuring that it can effectively absorb impact energy and play a buffering role. Under the action of the connecting plate 6, the buffer plate 7, and the L-shaped plate 9, the buffer plate 7 is compressed and rebounds, and the buffer plate 7 absorbs the impact force generated by the upright plate 5, playing a damping role, thereby improving the shock absorption capacity and stability of the rockfall protection structure at the entrance of the highway tunnel.

[0026] Furthermore, a splicing device is provided above the ground pile 1. The splicing device includes a first horizontal plate 10, a first bolt 11, a splicing plate 12, and a second bolt 13. The first horizontal plate 10 is fixedly connected to the back of the support plate 2. A first bolt 11 is provided on one side of the first horizontal plate 10. The first bolt 11 passes through the support plate 2 and is threaded to the inner wall of the support plate 2. A splicing plate 12 is provided above the first bolt 11. The splicing plate 12 is attached to the outer wall of the L-shaped plate 9. A second bolt 13 is threaded to the inner wall of the L-shaped plate 9. The second bolt 13 passes through the splicing plate 12 and the L-shaped plate 9 in sequence.

[0027] In the specific implementation process, it is worth noting that the inner wall of the support plate 2 has a groove, the size of which can completely fit the outer wall of the first horizontal plate 10. Through the cooperation between the first horizontal plate 10, the first bolt 11, the splicing plate 12, and the second bolt 13, the effect of longitudinal splicing of the rockfall prevention and buffer protection structure at the entrance of the highway tunnel is achieved when splicing is required. Under the action of the first bolt 11 and the first horizontal plate 10, the two support plates 2 are spliced ​​together, and a sealing gasket is fixedly connected between the two support plates 2 to ensure that small rocks and dust will not enter the support plates. Inside 2, the support plate 2 is damaged, which helps to extend the service life of the anti-falling rock buffer protection structure at the entrance of the highway tunnel. Under the action of the second bolt 13 and the splicing plate 12, the two L-shaped plates 9 are spliced. The surfaces of the L-shaped plate 9 and the splicing plate 12 are both provided with threaded holes. The L-shaped plate 9 and the splicing plate 12 are fixed by the second bolt 13. The first bolt 11 and the second bolt 13 are both made of stainless steel to ensure the corrosion resistance and oxidation resistance of the first bolt 11 and the second bolt 13. The splicing plate 12 is made of bearing steel to ensure that the splicing plate 12 will not be easily bent and deformed by external forces.

[0028] Furthermore, a top plate 14 is fixedly connected to the top of the protective plate 4. The top plate 14 is made of carbon steel to ensure that the top plate 14 will not be easily deformed or damaged due to external forces. A slope 17 is provided on the top of the top plate 14. A bearing steel is fixedly connected to the top of the slope 17 to ensure the hardness and impact resistance of the slope 17 and to guarantee the overall impact resistance of the slope 17.

[0029] In the specific implementation process, it is worth noting that, through the cooperation between the top plate 14 and the inclined surface 17, when a large rock falls on the top of the protective plate 4, the inclined surface 17 and the top plate 14 offset the impact force generated when the rock falls. Under the action of the top plate 14 and the inclined surface 17, combined with the hardness of the protective plate 4, it can better withstand the impact force from above, disperse the pressure, and reduce the risk of deformation of the protective plate 4 due to the impact of falling rocks.

[0030] Specifically, when it is necessary to extend the construction length of the anti-falling rock buffer protection structure at the entrance of a highway tunnel, the construction workers first insert the first horizontal plate 10 into the groove inside the support plate 2, and fix the first horizontal plate 10 and the support plate 2 with the first bolt 11. Then, the splicing plate 12 is suspended next to the L-shaped plate 9 by an external crane or other power device, and the L-shaped plate 9 and the splicing plate 12 are fixed with the second bolt 13. When the protective plate 4 is impacted by falling rocks, the protective plate 4 drives the vertical plate 5 to move downward, and the buffer plate 7 consumes the impact force generated when the falling rocks fall.

[0031] Example 2, by Figure 1-5 It can be seen that a second horizontal plate 15 is fixedly connected to the back of the top plate 14, and a third bolt 16 is provided on one side of the second horizontal plate 15. The third bolt 16 passes through the top plate 14 and is threaded to the inner wall of the top plate 14.

[0032] In the specific implementation process, it is worth noting that the cooperation between the second horizontal plate 15 and the third bolt 16 achieves the effect of splicing the two top plates 14. This is beneficial to sealing the top of the rockfall prevention and buffer protection structure at the entrance of the highway tunnel, preventing gaps from forming at the top of the rockfall prevention and buffer protection structure at the entrance of the highway tunnel. A sealing gasket is fixedly connected between the two top plates 14, which is beneficial to sealing the two top plates 14 and preventing small stones and dust from entering the interior of the rockfall prevention and buffer protection structure at the entrance of the highway tunnel.

[0033] Furthermore, the bottom of the support plate 2 is fixedly connected to the ground pile 1. The ground pile 1 can be made of reinforced concrete to ensure the overall stability and support capacity of the ground pile 1. The ground pile 1 and the pile tip 8 are integrally formed. In the construction of the anti-falling rock buffer protection structure at the entrance of the highway tunnel, the ground pile 1 is first pre-buried in the ground, and the bottom of the ground pile 1 is fixedly connected to the pile tip 8.

[0034] In the specific implementation process, it is worth noting that the function of the pile tip 8 is to guide the pile body of the ground pile 1 smoothly into the soil layer during the pile driving process, reduce resistance, and enable the ground pile 1 to better penetrate the hard soil layer, while also helping to improve the bearing capacity of the ground pile 1.

[0035] Although 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 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 appended claims and their equivalents.

Claims

1. A rockfall prevention buffer protection structure for highway tunnel entrances, comprising an arch wall (3), characterized in that: The bottom of the arch wall (3) is fixedly connected to a support plate (2), the bottom of the support plate (2) is fixedly connected to a ground pile (1), the bottom of the ground pile (1) is fixedly connected to a pile tip (8), and a buffer device is provided above the support plate (2). The buffer device includes a protective plate (4), a vertical plate (5), a connecting plate (6), a buffer plate (7), and an L-shaped plate (9); The protective plate (4) is set on the top of the outer wall of the arch wall (3). An L-shaped plate (9) is attached to the bottom of the outer wall of the protective plate (4) away from the arch wall (3). The L-shaped plate (9) is fixedly connected to the bottom of the outer wall of the arch wall (3). A vertical plate (5) is fixedly connected to the bottom of the protective plate (4). A connecting plate (6) is sleeved on the bottom of the outer wall of the vertical plate (5). The connecting plate (6) is fixedly connected between the arch wall (3) and the L-shaped plate (9). A buffer plate (7) is fixedly connected between the bottom of the protective plate (4) and the top of the connecting plate (6).

2. The rockfall prevention buffer protection structure for highway tunnel entrances according to claim 1, characterized in that: A splicing device is provided above the ground pile (1); The splicing device includes a first horizontal plate (10), a first bolt (11), a splicing plate (12), and a second bolt (13); The first horizontal plate (10) is fixedly connected to the back of the support plate (2). A first bolt (11) is provided on one side of the first horizontal plate (10). The first bolt (11) passes through the support plate (2) and is threaded to the inner wall of the support plate (2). A splicing plate (12) is provided above the first bolt (11). The splicing plate (12) is attached to the outer wall of the L-shaped plate (9). A second bolt (13) is threaded to the inner wall of the L-shaped plate (9). The second bolt (13) passes through the splicing plate (12) and the L-shaped plate (9) in sequence.

3. The rockfall prevention buffer protection structure for highway tunnel entrances according to claim 1, characterized in that: The top of the protective plate (4) is fixedly connected to a top plate (14), and the top of the top plate (14) has an inclined surface (17).

4. The rockfall prevention buffer protection structure for highway tunnel entrances according to claim 3, characterized in that: A second horizontal plate (15) is fixedly connected to the back of the top plate (14). A third bolt (16) is provided on one side of the second horizontal plate (15). The third bolt (16) passes through the top plate (14) and is threaded to the inner wall of the top plate (14).

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