A tunnel portal safety rockfall protection system

Abstract

The application relates to the technical field of shed tunnels, and discloses a tunnel mouth safety anti-falling rock protection system, which comprises an inner protection structure and a base connected with both ends of the inner protection structure, the inner protection structure comprises corrugated plates and connecting flanges connected with the ends of the corrugated plates, the connecting flanges on two adjacent corrugated plates are attached and locked, the protection system further comprises an outer protection structure, the outer protection structure comprises a group of supports arranged along the longitudinal direction on the outer side of the corrugated plates and a protective net arranged between two adjacent supports, and the two ends of the support are connected with the bases at the corresponding ends. The problems that the steel protective net frame is mainly composed of support frames and protective nets in the related art, lacks blocking measures for small-size falling rocks, and influences driving safety are solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel technology, specifically to a safety rockfall prevention system for tunnel entrances. Background Technology

[0002] A tunnel is a type of shelter-like tunnel, typically built in road sections prone to rockfalls (or landslides) to protect the safety of vehicles or pedestrians. Tunnels usually have a steel protective net frame at the exit for protection. They are mainly composed of a support frame and a protective net, but lack measures to block small falling rocks, which affects driving safety. Summary of the Invention

[0003] This invention proposes a safety rockfall prevention system for tunnel entrances, which solves the problem in related technologies where steel protective netting mainly consists of support frames and protective netting, lacking measures to block small-sized falling rocks, thus affecting driving safety.

[0004] The technical solution of the present invention is as follows: a tunnel entrance safety rockfall prevention system, comprising an inner protective structure and a base connected to both ends of the inner protective structure, the key being: the inner protective structure includes a corrugated plate and a connecting flange connected to the end of the corrugated plate, the connecting flanges on two adjacent corrugated plates are fitted together and locked, the protection system also includes an outer protective structure, the outer protective structure includes a set of supports erected on the outside of the corrugated plate and arranged longitudinally, and a protective net erected between two adjacent supports, the two ends of the supports are respectively connected to the base at the corresponding ends.

[0005] The inner protective structure also includes an I-beam disposed inside the corrugated plate, the I-beam being located inside the crest of the corrugated plate and the crest being in contact with the outer end face of the I-beam.

[0006] The support includes an outer arc-shaped rod, an inner arc-shaped rod, and a support column connecting the outer arc-shaped rod and the inner arc-shaped rod. The inner arc-shaped rod is connected to the inner protective structure, the protective net is connected to the outer arc-shaped rod, and the ends of both the outer arc-shaped rod and the inner arc-shaped rod are connected to the buffer structure.

[0007] The number of inner arc-shaped rods is at least two, and all the inner arc-shaped rods are arranged longitudinally. Each inner arc-shaped rod is connected to an outer arc-shaped rod by a support column.

[0008] The outer protective structure also includes a bottom support frame set on both sides of the inner arc-shaped rod and connected to the corrugated plate, and a top cover plate that is detachably connected to the bottom support frame. The top cover plate has a placement groove on the side facing the inner arc-shaped rod, and the placement grooves of the two top cover plates are spliced ​​together to form the mounting groove of the inner arc-shaped rod.

[0009] The inner and outer arc-shaped rods have the same structure, both consisting of a set of rods. The same end of the inner and outer rods is connected to the same connecting plate. Adjacent connecting plates are attached together and connected by fasteners. The connecting plate at the end is connected to the buffer structure.

[0010] The protective system also includes a buffer structure connected between the support and the base. The buffer structure includes a positioning shell for connecting to the upper surface of the base and having an open top, a support top plate disposed inside the positioning shell and for connecting to the support, and displacement rods disposed below both ends of the support top plate and forming a sliding fit with the positioning shell. It also includes an arc-shaped elastic structure connected between the two displacement rods and having an upward protrusion in the middle. The axial direction of the arc-shaped elastic structure is the same as the axial direction of the displacement rods. The middle part of the arc-shaped elastic structure is connected to the support top plate. The two displacement rods have horizontal movement freedom that moves away from each other by means of the downward pressure of the support top plate.

[0011] The buffer structure also includes a tie rod disposed at the bottom of the supporting top plate, with an arc-shaped elastic structure inserted between the tie rod and the supporting top plate.

[0012] A long, narrow groove is provided on the positioning shell at a position corresponding to the displacement rod, extending through its thickness direction. The length direction of the groove is perpendicular to the length direction of the displacement rod. Both ends of the displacement rod are inserted into the groove at their respective ends and form a sliding fit. The buffer structure also includes a limiting plate disposed on the outside of the groove and detachably connected to the positioning shell. Both ends of the displacement rod are in contact with the limiting plate at their respective ends.

[0013] The buffer structure also includes a limiting frame disposed inside the positioning shell and located between the two ends of the displacement rod, wherein the displacement rod is inserted into the limiting frame and forms a sliding fit.

[0014] The working principle and beneficial effects of this invention are as follows: The inner protective structure includes a corrugated plate and connecting flanges connected to the ends of the corrugated plate. The connecting flanges on adjacent corrugated plates are fitted together and locked. The outer protective structure includes a set of supports arranged longitudinally on the outside of the corrugated plate and a protective net installed between adjacent supports. The two ends of the supports are connected to the bases at their corresponding ends. When impacted by large falling rocks, the protective net can effectively act as a buffer, effectively improving the protective effect. The inner corrugated plate can block small falling rocks, thereby ensuring the safety of vehicles traveling under the tunnel. Even if the protective net cannot withstand sufficient impact and is damaged, the inner corrugated plate can provide secondary buffering, thereby ensuring the safety of vehicle travel. The inner and outer protective structures work together to improve the rockfall prevention effect of the tunnel compared to existing protective net tunnel structures, effectively blocking falling rocks and improving vehicle travel safety. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention in one direction.

[0017] Figure 2 for Figure 1 A magnified view of A in the middle.

[0018] Figure 3 for Figure 1 A magnified view of B in the middle.

[0019] Figure 4 This is a schematic diagram of the structure from another direction of the present invention.

[0020] Figure 5 for Figure 4 A magnified view of C.

[0021] Figure 6 This is a schematic diagram of the connection structure between the support and the inner protective structure in this invention.

[0022] Figure 7 This is a schematic diagram of the buffer structure in one direction in this invention.

[0023] Figure 8 This is a schematic diagram of the buffer structure from another direction in this invention.

[0024] Figure 9 This is a schematic diagram of the internal structure of the buffer structure in this invention.

[0025] Figure 10 This is a perspective view of the connection between the arc-shaped elastic structure and the supporting top plate, displacement rod, and limiting frame in this invention.

[0026] Figure 11 This is a main diagram showing the connection between the arc-shaped elastic structure and the supporting top plate, displacement rod, and limiting frame in this invention.

[0027] In the diagram: 1. Bracket; 1-1. Outer arc-shaped rod; 1-2. Inner arc-shaped rod; 1-3. Support column; 2. Protective net; 3. Bottom support frame; 3-1. Outer support plate; 3-2. Inner support plate; 4. Top cover plate; 5. Placement slot; 6. Buffer structure; 6-1. Positioning shell; 6-1-1. Fixed base; 6-1-2. Baffle; 6-1-3. Protective plate; 6-2. Supporting top plate; 6-3. Displacement rod; 6-4. Arc-shaped elastic structure 6-5. Tie rod; 6-6. Slide groove; 6-7. Limiting plate; 6-8. Limiting frame; 7. Connecting plate; 8. Inner protective structure; 8-1. Corrugated plate; 8-2. Connecting flange; 8-3. I-beam; 9. Base; 10. Mounting bolt; 11. Transverse connecting rope; 12. First fixing pin; 13. Transverse damper; 14. Second fixing pin; 15. Longitudinal connecting rope; 16. Longitudinal damper; 17. Connecting base plate; 18. Through hole. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Specific embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a tunnel entrance safety rockfall prevention system includes an inner protective structure 8 and bases 9 connected to both ends of the inner protective structure 8. The inner protective structure 8 includes a corrugated plate 8-1 and a connecting flange 8-2 connected to the end of the corrugated plate 8-1. The connecting flanges 8-2 on two adjacent corrugated plates 8-1 are fitted together and locked. The protection system also includes an outer protective structure, which includes a set of supports 1 erected on the outside of the corrugated plate 8-1 and arranged longitudinally, and a protective net 2 erected between two adjacent supports 1. The two ends of the supports 1 are respectively connected to the bases 9 at the corresponding ends.

[0030] As a further improvement to the present invention, the inner protective structure 8 also includes an I-beam 8-3 disposed inside the corrugated plate 8-1, the I-beam 8-3 being located inside the crest of the corrugated plate 8-1 and the crest being in contact with the outer end face of the I-beam 8-3. Figure 6 As shown, the use of I-beams 8-3 ensures that the inner protective structure 8 has sufficiently high strength and load-bearing capacity.

[0031] As a further improvement to the present invention, the bracket 1 includes an outer arc-shaped rod 1-1, an inner arc-shaped rod 1-2, and a support column 1-3 connecting the outer arc-shaped rod 1-1 and the inner arc-shaped rod 1-2. The inner arc-shaped rod 1-2 is connected to the inner protective structure 8, the protective net 2 is connected to the outer arc-shaped rod 1-1, and the ends of both the outer arc-shaped rod 1-1 and the inner arc-shaped rod 1-2 are connected to the buffer structure 6. Figure 1 , Figure 2 and Figure 3 As shown, the outer arc rod 1-1 and the inner arc rod 1-2 are both set along the left and right direction. The front and rear sides of the protective net 2 are respectively connected to the corresponding outer arc rod 1-1, so that there is a sufficiently large buffer space between the protective net 2 and the corrugated plate 8-1 of the inner protective structure 8. When a rock falls on the protective net 2, the protective net 2 can have a sufficiently large deformation space, effectively playing a buffering role.

[0032] As a further improvement to the present invention, the number of inner arc-shaped rods 1-2 is at least two, all of which are arranged longitudinally, and each inner arc-shaped rod 1-2 is connected to an outer arc-shaped rod 1-1 by a support column 1-3. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the number of inner arc-shaped rods 1-2 is preferably two. The two inner arc-shaped rods 1-2 are arranged in the front-to-back direction. The upper ends of the inner and outer support columns 1-3 are connected to the outer arc-shaped rod 1-1. The lower ends of the inner and outer support columns 1-3 are connected to the inner arc-shaped rod 1-2 on the inner side and the inner arc-shaped rod 1-2 on the outer side, respectively, forming a triangular support structure, which can improve the compressive strength of the bracket 1 and enhance the stability of the bracket 1.

[0033] As a further improvement to the present invention, the outer protective structure also includes a bottom support frame 3 disposed on both sides of the inner arc-shaped rod 1-2 and connected to the corrugated plate 8-1, and a top cover plate 4 detachably connected to the bottom support frame 3. The top cover plate 4 has a placement groove 5 on the side facing the inner arc-shaped rod 1-2, and the placement grooves 5 of the two top cover plates 4 are joined to form an installation groove for the inner arc-shaped rod 1-2. Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the inner arc rod 1-2 is clamped in the placement slots 5 of the front and rear top cover plates 4, and the connection is firm and reliable with good stability. The top cover plate 4 and the bottom support frame 3 are detachable, which facilitates the disassembly and repair of the top cover plate 4.

[0034] As a further improvement to the present invention, the inner arc-shaped rod 1-2 and the outer arc-shaped rod 1-1 have the same structure, both comprising a set of rods. The same end of the inner and outer rods is connected to the same connecting plate 7. Adjacent connecting plates 7 are attached together and connected by fasteners. The connecting plate 7 at the end is connected to the buffer structure 6. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, both the inner arc rod 1-2 and the outer arc rod 1-1 are formed by splicing multiple rods. The fasteners can be disassembled later for partial replacement, which can reduce maintenance costs.

[0035] As a further improvement to the present invention, the bottom support frame 3 includes an outer support plate 3-1 and two inner support plates 3-2 connected between the outer support plate 3-1 and the inner protective structure 8. The two inner support plates 3-2 are arranged longitudinally, and the top cover plate 4 is detachably connected to the outer support plate 3-1. The outer support plate 3-1 is welded to the two inner support plates 3-2. Figure 6 As shown, the two inner support plates 3-2 are reliably connected to the corrugated plate 8-1 of the inner protective structure 8, thereby ensuring a reliable connection between the outer support plate 3-1 and the corrugated plate 8-1. This provides stable support for the top cover plate 4 and the inner arc rod 1-2. The top cover plate 4 and the outer support plate 3-1 are detachable, facilitating the disassembly and maintenance of the inner arc rod 1-2.

[0036] As a further improvement to the present invention, the top cover 4 is detachably connected to the bottom support frame 3 by means of mounting bolts 10. Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the top cover plate 4 and the bottom support frame 3 are connected together using mounting bolts 10. The connection is firm and reliable, and the disassembly and assembly are convenient and quick, saving time and effort.

[0037] As a further improvement to the present invention, transverse connecting ropes 11 are connected to both sides of the protective net 2, and a first fixing pin 12 is provided on the bracket 1. The transverse connecting ropes 11 pass through the first fixing pin 12, and a transverse damper 13 is connected between the end of the transverse connecting rope 11 and the bracket 1. Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, when a large rock falls onto the surface of the protective net 2, the protective net 2 will pull the horizontal connecting rope 11. The horizontal connecting rope 11 will drive the horizontal damper 13 to work, providing tension to the protective net 2, thereby buffering and even eliminating the impact force brought by the large rock. The horizontal damper 13 is compressed to its maximum value and begins to rebound, thereby providing a force in the opposite direction to the horizontal connecting rope 11 and the protective net 2, so that the protective net 2 returns to its original shape, thus pushing away the large rock. The outer protective structure has an automatic recovery effect, which greatly reduces the later maintenance cost of the shed and improves its practicality.

[0038] As a further improvement to the present invention, the protective net 2 includes a set of mesh panels arranged laterally, with adjacent mesh panels connected by a second fixing pin 14, and the second fixing pins 14 between adjacent mesh panels are all fitted onto the same longitudinal connecting rope 15. The longitudinal connecting rope 15 is arranged longitudinally along its length, and a longitudinal damper 16 is connected between the end of the longitudinal connecting rope 15 and the bracket 1. Figure 1 and Figure 2 As shown, the protective net 2 adopts a multi-unit splicing structure, which is easy to replace if damaged later, resulting in low maintenance costs. When large rocks fall onto the surface of the protective net 2, the longitudinal damper 16 can also buffer or even cancel the impact force brought by the large rocks. The longitudinal damper 16 can provide a force in the opposite direction to the longitudinal connecting rope 15 and the protective net 2, so that the protective net 2 returns to its original shape, thereby pushing away the large rocks. The buffering effect is better when the longitudinal damper 16 and the transverse damper 13 work together.

[0039] As a further improvement to the present invention, the protective system also includes a buffer structure 6 connected between the bracket 1 and the base 9. The buffer structure 6 includes a positioning shell 6-1 for connecting to the upper end surface of the base 9 and having an open top, a support top plate 6-2 disposed within the positioning shell 6-1 and for connecting to the bracket 1, and displacement rods 6-3 disposed below both ends of the support top plate 6-2 and forming a sliding fit with the positioning shell 6-1. It also includes an arc-shaped elastic structure 6-4 connected between the two displacement rods 6-3 and protruding upwards in the middle. The axial direction of the arc-shaped elastic structure 6-4 is the same as the axial direction of the displacement rods 6-3. The middle part of the arc-shaped elastic structure 6-4 is connected to the support top plate 6-2. The two displacement rods 6-3 have horizontal degrees of freedom to move away from each other by means of the downward pressure of the support top plate 6-2. Figure 1 , Figure 3 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, when the support 1 moves downward, it will cause the supporting top plate 6-2 to move downward. The supporting top plate 6-2 begins to compress the arc-shaped elastic structure 6-4. Through the design of the displacement rods 6-3, the arc-shaped elastic structure 6-4 is compressed under force, and the two displacement rods 6-3 move away from each other. When the arc-shaped elastic structure 6-4 completes the compression and begins to recover, it will cause the two displacement rods 6-3 to move closer to each other, and will push the supporting top plate 6-2 upward, thereby causing the support 1 to rebound, deflecting the falling rocks and restoring the shed to its original state. This can effectively play a buffering and recovery role, prevent the connection between the support 1 and the base 9 from breaking, and effectively play a protective role. The arc-shaped elastic structure 6-4 is preferably a composite bow structure.

[0040] As a further improvement to the present invention, the buffer structure also includes a pull rod 6-5 disposed at the bottom of the supporting top plate 6-2, and an arc-shaped elastic structure 6-4 inserted between the pull rod 6-5 and the supporting top plate 6-2. Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the two ends of the pull rod 6-5 are connected to the support top plate 6-2 by connecting bolts. The middle part of the pull rod 6-5 is recessed downwards. The arc-shaped elastic structure 6-4 is inserted between the middle part of the pull rod 6-5 and the support top plate 6-2. The pull rod 6-5 is used to fix the support top plate 6-2, so that the support top plate 6-2 can slide inside the positioning shell 6-1.

[0041] As a further improvement to the present invention, a long, narrow groove 6-6 is provided on the positioning shell 6-1 at a position corresponding to the displacement rod 6-3, extending through its thickness direction. The length direction of the groove 6-6 is perpendicular to the length direction of the displacement rod 6-3. Both ends of the displacement rod 6-3 are respectively inserted into the corresponding ends of the groove 6-6 to form a sliding fit. The buffer structure 6 also includes a limiting plate 6-7 disposed outside the groove 6-6 and detachably connected to the positioning shell 6-1. Both ends of the displacement rod 6-3 contact the corresponding ends of the limiting plate 6-7. Figure 8 and Figure 9 As shown, the length direction of the two displacement rods 6-3 is the same as the axis direction of the arc-shaped elastic structure 6-4. The length direction of the slide groove 6-6 is set along the front-back direction. The displacement rods 6-3 are clamped between the two limiting plates 6-7 on the left and right sides. This not only does not affect the front-back movement of the displacement rods 6-3 in the slide groove 6-6, but also effectively prevents the displacement rods 6-3 from shifting in the left-right direction. The structure is simple, the connection is firm and reliable, and the disassembly and assembly are convenient and quick, saving time and effort.

[0042] As a further improvement to the present invention, the buffer structure 6 also includes a limiting frame 6-8 disposed inside the positioning shell 6-1 and located between the two ends of the displacement rod 6-3, wherein the displacement rod 6-3 and the limiting frame 6-8 are inserted into each other and form a sliding fit. Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the limiting frame 6-8 has a through hole that matches the shape of the slide groove 6-6. The displacement rod 6-3 passes through the through hole, so that the limiting frame 6-8 can support the displacement rod 6-3 and prevent the displacement rod 6-3 from bending and deforming.

[0043] As a further improvement to the present invention, the number of limiting frames 6-8 is at least two, all of which are arranged along the length of the displacement rod 6-3, and the arc-shaped elastic structure 6-4 is fitted onto the displacement rod 6-3 and engaged between two adjacent limiting frames 6-8. Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the limiting frame 6-8 not only supports the displacement rod 6-3, but also limits the arc-shaped elastic structure 6-4, preventing the arc-shaped elastic structure 6-4 from shifting along the length of the displacement rod 6-3, thus providing a better buffering effect.

[0044] As a further improvement to the present invention, the number of arc-shaped elastic structures 6-4 is at least two, and all the arc-shaped elastic structures 6-4 are arranged along the length direction of the displacement rod 6-3. For example... Figure 8 , Figure 9 and Figure 10 As shown, the two arc-shaped elastic structures 6-4 work together to support the top plate 6-2, making the top plate 6-2 more evenly stressed and more stable during lifting.

[0045] As a further improvement to the present invention, the positioning shell 6-1 includes a fixed base 6-1-1 and baffles 6-1-2 disposed at both ends above the fixed base 6-1-1. The middle part of the baffles 6-1-2 is bent outward to form a U-shaped structure. The baffles 6-1-2 are formed by welding steel plates. The shape of the supporting top plate 6-2 matches the shape of the baffles 6-1-2. The displacement rod 6-3 is located inside the U-shaped structure, and the two ends of the displacement rod 6-3 respectively form a sliding fit with the side plates at the corresponding ends of the U-shaped structure. Figure 7 , Figure 8 and Figure 9 As shown, the U-shaped structure of the baffle 6-1-2 and the plate at its end form a receiving space, which can prevent the displacement rod 6-3 from protruding outside the fixed base 6-1-1 and being damaged by bumps.

[0046] As a further improvement to the present invention, the positioning shell 6-1 also includes a protective plate 6-1-3 connected between the same ends of the baffles 6-1-2, the bottom of which is connected to the fixed base 6-1-1. Figure 7 and Figure 9As shown, the protective plate 6-1-3 is used to connect the front and rear baffles 6-1-2 together, thereby making the connection between the baffle 6-1-2 and the fixed base 6-1-1 more secure and reliable.

[0047] As a further improvement to the present invention, the baffle 6-1-2 and the fixed base 6-1-1 are detachably connected. By removing the baffle 6-1-2, the internal arc-shaped elastic structure 6-4 can be maintained more conveniently.

[0048] As a further improvement to the present invention, a connecting base plate 17 is provided at the bottom of the outer side of each end of the baffle 6-1-2. The connecting base plate 17 is located on the outer side of the U-shaped side plate. A through hole 18 is provided on the connecting base plate 17, and a locking bolt is provided at the through hole 18. A screw hole is provided on the fixed base 6-1-1, and the lower end of the locking bolt is threadedly connected to the screw hole. Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, connecting base plates 17 are provided at both ends of the front and rear baffles 6-1-2. The connecting base plates 17 are located within the accommodating space of the baffles 6-1-2 and at the corner of the fixed base 6-1-1. The connecting base plates 17 and the fixed base 6-1-1 are locked together by the locking bolts at the through holes 18, thereby locking the baffles 6-1-2 and the fixed base 6-1-1 together. The connection is firm and reliable, and the disassembly and assembly are convenient and quick, saving time and effort.

[0049] In practical use, the axis of the shed is set along the front-to-back direction. All supports 1 are arranged along the front-to-back direction on the outside of the corrugated plate 8-1. The bending shape of the supports 1 matches the bending shape of the shed. The left and right ends of the supports 1 are connected to the corresponding support top plates 6-2 through connecting plates 7. The length direction of the transverse connecting rope 11 is set along the left-to-right direction, and the length direction of the longitudinal connecting rope 15 is set along the front-to-back direction. The axes of the displacement rod 6-3 and the arc-shaped elastic structure 6-4 are both set along the left-to-right direction. Two baffles 6-1-2 are set on the fixed base 6-1-1. Each baffle 6-1-2 has a displacement rod 6-3. Each displacement rod 6-3 is clamped between the left and right limiting plates 6-7. Each displacement rod 6-3 is fitted with a set of limiting frames 6-8 arranged along its length direction. The baffles 6-1-2 and the limiting frames 6-8 are provided with sliding grooves 6-6. The length direction of the sliding grooves 6-6 is set along the front-to-back direction. The two left and right arc-shaped elastic structures 6-4 are both fitted onto the displacement rod 6-3 and clamped between the two adjacent limiting frames 6-8. Two tie rods 6-5 are fixed below the supporting top plate 6-2, and the two left and right arc-shaped elastic structures 6-4 are located between the tie rods 6-5 and the supporting top plate 6-2. The fixing base 6-1-1 of the positioning shell 6-1 is connected to the base 9 via locking bolts at the connecting base plate 17, and the supporting top plate 6-2 is connected to the bracket 1.

[0050] When impacted by large falling rocks, the protective net 2, along with the lateral damper 13 and longitudinal damper 16, effectively acts as a buffer, while the buffer structure 6 provides cushioning and recovery, thus significantly improving the protective effect. The inner corrugated plate 8-1 can block small falling rocks, ensuring the safety of vehicles traveling under the tunnel. Even if the protective net 2 cannot withstand sufficient impact and is damaged, the inner corrugated plate 8-1 provides secondary cushioning, ensuring the safety of vehicle travel. The inner protective structure 8, working in conjunction with the outer protective structure, improves the rockfall protection effect of the tunnel compared to the existing protective net 2 type tunnel structure, effectively blocking falling rocks and enhancing vehicle travel safety.

[0051] When support 1 moves downward, it causes the supporting top plate 6-2 to move downward as well. The supporting top plate 6-2 then compresses the arc-shaped elastic structure 6-4. Through the design of the sliding groove 6-6 and the displacement rod 6-3, the arc-shaped elastic structure 6-4 is compressed under force, and the two displacement rods 6-3 move away from each other. When the arc-shaped elastic structure 6-4 has completed its compression and begins to recover, it causes the two displacement rods 6-3 to move closer together and pushes the supporting top plate 6-2 upward, thereby causing support 1 to rebound and deflect the falling rocks, restoring the shed to its original state. This effectively acts as a buffer, preventing breakage at the connection between support 1 and base 9, and effectively providing protection.

Claims

1. A tunnel portal safety rockfall protection system comprising an inner protection structure (8) and a base (9) connected to both ends of the inner protection structure (8), characterized in that: The inner layer protection structure (8) comprises corrugated plates (8-1) and connecting flanges (8-2) connected to the ends of the corrugated plates (8-1), the connecting flanges (8-2) on two adjacent corrugated plates (8-1) are attached and locked, the protection system further comprises an outer layer protection structure, the outer layer protection structure comprises a group of supports (1) arranged longitudinally outside the corrugated plates (8-1) and a protective net (2) arranged between two adjacent supports (1), the two ends of the support (1) are connected to the corresponding base (9) respectively; The protection system further comprises a buffer structure (6) connected between the support (1) and the base (9); The support (1) comprises an outer arc-shaped rod (1-1), an inner arc-shaped rod (1-2) and a support column (1-3) connected between the outer arc-shaped rod (1-1) and the inner arc-shaped rod (1-2), the inner arc-shaped rod (1-2) is connected to the inner layer protection structure (8), the protective net (2) is connected to the outer arc-shaped rod (1-1), and the ends of the outer arc-shaped rod (1-1) and the inner arc-shaped rod (1-2) are connected to the buffer structure (6); The outer layer protection structure further comprises a bottom support frame (3) arranged on both sides of the inner arc-shaped rod (1-2) and connected to the corrugated plate (8-1), and a top cover plate (4) formed in a detachable manner with the bottom support frame (3), the side of the top cover plate (4) facing the inner arc-shaped rod (1-2) is provided with a placing groove (5), and the placing grooves (5) of the two top cover plates (4) are spliced to form a mounting groove of the inner arc-shaped rod (1-2).

2. A tunnel portal safety rockfall protection system according to claim 1, wherein: The inner layer protection structure (8) further comprises an I-beam (8-3) arranged inside the corrugated plate (8-1), the I-beam (8-3) is located inside the wave crest of the corrugated plate (8-1) and the wave crest is attached to the outer end face of the I-beam (8-3).

3. A tunnel portal safety rockfall protection system according to claim 1, wherein: The number of the inner arc-shaped rods (1-2) is at least two, all the inner arc-shaped rods (1-2) are arranged longitudinally, and each inner arc-shaped rod (1-2) is connected with the support column (1-3) between the outer arc-shaped rod (1-1).

4. A tunnel portal safety rockfall protection system according to claim 1, wherein: The inner arc-shaped rod (1-2) and the outer arc-shaped rod (1-1) are structurally identical, both comprising a group of rod bodies, the same end of the inner and outer rod bodies is connected to the same connecting plate (7), the adjacent two connecting plates (7) are attached and connected by means of fasteners, and the connecting plate (7) located at the end is connected to the buffer structure (6).

5. A tunnel portal safety rockfall protection system according to claim 1, wherein: The buffer structure (6) comprises a positioning shell (6-1) connected with the upper end surface of the base (9) and having an open structure at the top, a support top plate (6-2) arranged in the positioning shell (6-1) and connected with the support (1), and displacement rods (6-3) arranged below both ends of the support top plate (6-2) and in sliding fit with the positioning shell (6-1), further comprising an arc-shaped elastic structure (6-4) connected between the two displacement rods (6-3) and protruding upward in the middle, the axis direction of the arc-shaped elastic structure (6-4) being the same as that of the displacement rods (6-3), the middle part of the arc-shaped elastic structure (6-4) being connected with the support top plate (6-2), and the two displacement rods (6-3) having horizontal movement freedom of moving away from each other by virtue of the downward pressing of the support top plate (6-2).

6. A tunnel portal safety rockfall protection system according to claim 5, wherein: The buffer structure (6) further comprises a pull rod (6-5) arranged at the bottom of the support top plate (6-2), and the arc-shaped elastic structure (6-4) is inserted between the pull rod (6-5) and the support top plate (6-2).

7. A tunnel portal safety rockfall protection system as claimed in claim 5, wherein: A long strip-shaped sliding groove (6-6) penetrating the thickness direction of the positioning shell (6-1) is arranged at a position corresponding to the displacement rod (6-3) on the positioning shell (6-1), the length direction of the sliding groove (6-6) is perpendicular to the length direction of the displacement rod (6-3), the two ends of the displacement rod (6-3) are respectively inserted into the sliding groove (6-6) at the corresponding end and form a sliding fit, and the buffer structure (6) further comprises a limiting plate (6-7) arranged outside the sliding groove (6-6) and in detachable connection with the positioning shell (6-1), and the two ends of the displacement rod (6-3) are respectively in contact with the limiting plate (6-7) at the corresponding end.

8. A tunnel portal safety rockfall protection system as claimed in claim 5, wherein: The buffer structure (6) further comprises a limiting frame (6-8) arranged inside the positioning shell (6-1) and between the two ends of the displacement rod (6-3), and the displacement rod (6-3) is inserted into the limiting frame (6-8) and forms a sliding fit.

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