CN221029703U - Tunnel portal safety anti-falling stone protection system - Google Patents

Abstract

The utility model relates to the technical field of shed tunnels and provides a tunnel portal safety anti-falling stone protection system, which comprises an inner layer protection structure and bases connected with two ends of the inner layer protection structure, wherein the inner layer protection structure comprises corrugated plates and connecting flanges connected to the ends of the corrugated plates, the connecting flanges on two adjacent corrugated plates are bonded and locked, the protection system also comprises an outer layer protection structure, the outer layer protection structure comprises a group of supports which are erected outside the corrugated plates and are longitudinally arranged, and a protection net which is erected between the two adjacent supports, and two ends of each support are respectively connected with the bases of the corresponding ends. The steel protection net rack mainly comprises a support frame and a protection net, and solves the problems that the steel protection net rack in the related art lacks a blocking measure for small-size falling rocks and affects driving safety.

Description

A tunnel entrance safety anti-rockfall protection system

Technical Field

The utility model relates to the technical field of shed tunnels, and in particular to a tunnel entrance safety rockfall prevention protection system.

Background technique

A shed tunnel is a shed-like tunnel, which is usually built on roads where rockfalls are frequent (or landslides are possible) to protect the safety of vehicles or pedestrians. A shed tunnel usually has a steel protective grid set up at the exit to play a protective role. It is mainly composed of a support frame and a protective net. It lacks measures to block small-sized falling rocks, affecting driving safety.

Utility Model Content

The utility model provides a tunnel entrance safety anti-rockfall protection system, which solves the problem in the related art that the steel protection grid frame is mainly composed of a support frame and a protection net, lacks blocking measures for small-sized falling rocks, and affects driving safety.

The technical solution of the utility model is as follows: a tunnel entrance safety anti-rockfall protection system, including an inner layer protection structure and a base connected to the two ends of the inner layer protection structure, the key is: the inner layer protection 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 and locked, the protection system also includes an outer layer protection structure, the outer layer protection structure includes a group of brackets erected on the outside of the corrugated plate and arranged in the longitudinal direction, and a protection net erected between two adjacent brackets, and the two ends of the bracket are respectively connected to the base at the corresponding end.

The inner layer protection structure also includes an I-beam arranged inside the corrugated plate. The I-beam is located inside the wave crest of the corrugated plate and the wave crest fits the outer end surface of the I-beam.

The bracket includes an outer arc rod, an inner arc rod, and a support column connected between the outer arc rod and the inner arc rod, the inner arc rod is connected to the inner layer protection structure, the protection net is connected to the outer arc rod, and the ends of the outer arc rod and the inner arc rod are connected to the buffer structure.

The number of the inner arc rods is at least two, all of which are arranged in the longitudinal direction, and a support column is connected between each inner arc rod and the outer arc rod.

The outer protective structure also includes a bottom support frame arranged on both sides of the inner arc rod and connected to the corrugated plate, and a top cover plate formed with a detachable connection with the bottom support frame. A placement groove is provided on the side of the top cover plate facing the inner arc rod, and the placement grooves of the two top cover plates are spliced to form an installation groove of the inner arc rod.

The inner arc rod and the outer arc rod have the same structure, both of which include a group of rod bodies. The same end of the inner and outer layers of the rod bodies is connected to the same connecting plate. Two adjacent connecting plates are attached and connected by fasteners. The connecting plate at the end is connected to the buffer structure.

The protection system also includes a buffer structure connected between the bracket and the base, the buffer structure includes a positioning shell for connecting to the upper end surface of the base and having an open top structure, a supporting top plate arranged in the positioning shell and used to connect to the bracket, and a displacement rod arranged below both ends of the supporting 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 convex in the middle, the axial direction of the arc-shaped elastic structure is the same as the axial direction of the displacement rod, the middle part of the arc-shaped elastic structure is connected to the supporting top plate, and the two displacement rods have the freedom to move horizontally away from each other with the help of the downward pressure of the supporting top plate.

The buffer structure also includes a pull rod arranged at the bottom of the supporting top plate, and the arc-shaped elastic structure is inserted between the pull rod and the supporting top plate.

A long strip-shaped slide groove is provided on the positioning shell at a position corresponding to the displacement rod, which runs through the thickness direction of the positioning shell. The length direction of the slide groove is perpendicular to the length direction of the displacement rod. The two ends of the displacement rod are respectively plugged into the slide grooves at the corresponding ends to form a sliding fit. The buffer structure also includes a limit plate which is arranged on the outside of the slide groove and is detachably connected to the positioning shell. The two ends of the displacement rod are respectively in contact with the limit plates at the corresponding ends.

The buffer structure also includes a limiting frame arranged inside the positioning shell and between the two ends of the displacement rod, and the displacement rod and the limiting frame are plugged and slidably matched.

The working principle and beneficial effects of the utility model are as follows: 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 attached and locked, the outer protective structure includes a group of brackets erected on the outer side of the corrugated plate and arranged in the longitudinal direction, and a protective net erected between two adjacent brackets, and the two ends of the bracket are respectively connected to the base at the corresponding end. When hit by large-sized falling rocks from the outside, the protective net can effectively play a blocking and buffering role, effectively improving the protective effect. The inner corrugated plate can block small-sized falling rocks, thereby ensuring the safety of vehicles traveling under the shed tunnel. Even if the protective net cannot withstand sufficient impact force and is damaged, the inner corrugated plate can provide secondary buffering, thereby ensuring the safety of vehicle driving. The inner protective structure and the outer protective structure work together, and compared with the existing protective net-type shed tunnel structure, the anti-falling rock effect of the shed tunnel is improved, the falling of falling rocks is effectively blocked, and the safety of vehicle driving is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

FIG1 is a schematic structural diagram of the utility model in one direction.

FIG. 2 is an enlarged view of A in FIG. 1 .

FIG. 3 is an enlarged view of B in FIG. 1 .

FIG. 4 is a schematic diagram of the structure of the utility model in another direction.

FIG. 5 is an enlarged view of C in FIG. 4 .

FIG. 6 is a schematic diagram of the connection structure between the support and the inner protective structure of the present invention.

FIG. 7 is a schematic structural diagram of the buffer structure in one direction of the present invention.

FIG. 8 is a schematic structural diagram of the buffer structure in another direction of the present invention.

FIG. 9 is a schematic diagram of the internal structure of the buffer structure in the present invention.

FIG. 10 is a three-dimensional diagram of the connection between the arc-shaped elastic structure and the supporting top plate, the displacement rod, and the limiting frame in the utility model.

FIG. 11 is a main body diagram of the arc-shaped elastic structure in the utility model connected with the supporting top plate, the displacement rod, and the limit frame.

In the figure: 1, bracket, 1-1, outer arc rod, 1-2, inner arc rod, 1-3, support column, 2, protection net, 3, bottom support frame, 3-1, outer support plate, 3-2, inner support plate, 4, top cover plate, 5, placement groove, 6, buffer structure, 6-1, positioning shell, 6-1-1, fixed base, 6-1-2, baffle, 6-1-3, protection plate, 6-2, support top plate, 6-3, displacement rod, 6-4, arc elastic structure , 6-5, pull rod, 6-6, slide groove, 6-7, limit plate, 6-8, limit frame, 7, connecting plate, 8, inner protective structure, 8-1, corrugated plate, 8-2, connecting flange, 8-3, I-beam, 9, base, 10, mounting bolts, 11, transverse connecting rope, 12, first fixing pin, 13, transverse damper, 14, second fixing pin, 15, longitudinal connecting rope, 16, longitudinal damper, 17, connecting bottom plate, 18, through hole.

Detailed ways

The following will be combined with 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 of 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.

A specific embodiment, as shown in Figures 1, 2, 3 and 4, is a tunnel entrance safety protection system for preventing rockfall, including an inner layer protection structure 8 and a base 9 connected to both ends of the inner layer protection structure 8, the inner layer protection 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 and locked, the protection system also includes an outer layer protection structure, the outer layer protection structure includes a group of brackets 1 erected on the outside of the corrugated plate 8-1 and arranged in the longitudinal direction, and a protection net 2 erected between two adjacent brackets 1, and the two ends of the bracket 1 are respectively connected to the base 9 at the corresponding ends.

As a further improvement of 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 surface of the I-beam 8-3. As shown in FIG6 , the use of the I-beam 8-3 enables the inner protective structure 8 to have sufficiently high strength and load-bearing capacity as a whole.

As a further improvement of the present invention, the bracket 1 includes an outer arc rod 1-1, an inner arc rod 1-2, and a support column 1-3 connected between the outer arc rod 1-1 and the inner arc rod 1-2, the inner arc rod 1-2 is connected to the inner layer protection structure 8, the protection net 2 is connected to the outer arc rod 1-1, and the ends of the outer arc rod 1-1 and the inner arc rod 1-2 are connected to the buffer structure 6. As shown in Figures 1, 2 and 3, the length directions of the outer arc rod 1-1 and the inner arc rod 1-2 are both arranged along the left and right directions, and the front and rear sides of the protection net 2 are respectively connected to the outer arc rod 1-1 on the corresponding sides, so that a sufficiently large buffer space is left between the protection net 2 and the corrugated plate 8-1 of the inner layer protection structure 8. When a rock falls on the protection net 2, the protection net 2 can have a sufficiently large deformation space to effectively play a buffering role.

As a further improvement to the present invention, the number of inner arc rods 1-2 is at least two, all inner arc rods 1-2 are arranged in the longitudinal direction, and a support column 1-3 is connected between each inner arc rod 1-2 and the outer arc rod 1-1. As shown in Figures 1, 2, 3, 4 and 5, the number of inner arc rods 1-2 is preferably two, and the two inner arc 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 rod 1-1, and the lower ends of the inner and outer support columns 1-3 are respectively connected to the inner arc rod 1-2 on the inside and the outer inner arc rod 1-2 to form a triangular support structure, which can improve the compressive strength of the bracket 1 and enhance the stability of the bracket 1.

As a further improvement of the present invention, the outer protective structure also includes a bottom support frame 3 arranged on both sides of the inner arc 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, and a placement groove 5 is arranged on the side of the top cover plate 4 facing the inner arc rod 1-2, and the placement grooves 5 of the two top cover plates 4 are spliced to form a mounting groove of the inner arc rod 1-2. As shown in Figures 1, 2, 4 and 6, the inner arc rod 1-2 is clamped in the placement grooves 5 of the front and rear top cover plates 4, and the connection is firm and reliable, with good stability, and the top cover plate 4 is detachable from the bottom support frame 3, which is convenient for disassembly and repair of the top cover plate 4.

As a further improvement of the present invention, the inner arc rod 1-2 and the outer arc rod 1-1 have the same structure, both of which include a group of rod bodies, the same end of the inner and outer layers of the rod bodies is connected to the same connecting plate 7, two adjacent connecting plates 7 are attached and connected by fasteners, and the connecting plate 7 at the end is connected to the buffer structure 6. As shown in Figures 1, 2, 3 and 4, the inner arc rod 1-2 and the outer arc rod 1-1 are both formed by splicing a plurality of rod bodies, and the fasteners can be removed later to perform partial replacement, which can reduce maintenance costs.

As a further improvement of 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 in the longitudinal direction, the top cover plate 4 is detachably connected to the outer support plate 3-1, and the outer support plate 3-1 is welded to the two inner support plates 3-2. As shown in FIG6, the front and rear two inner support plates 3-2 are reliably connected to the corrugated plate 8-1 of the inner protective structure 8, so that the outer support plate 3-1 is reliably connected to the corrugated plate 8-1, which plays a stable supporting role for the top cover plate 4 and the inner arc rod 1-2, and the top cover plate 4 and the outer support plate 3-1 are detachable, which is convenient for disassembly and maintenance of the inner arc rod 1-2.

As a further improvement of the present invention, the top cover plate 4 is detachably connected to the bottom support frame 3 by means of mounting bolts 10. As shown in Figs. 1, 2, 4 and 6, the top cover plate 4 is connected to the bottom support frame 3 by means of mounting bolts 10, and the connection is firm and reliable, and the assembly and disassembly is convenient and fast, saving time and effort.

As a further improvement of the utility model, transverse connecting ropes 11 are connected to both sides of the protective net 2, a first fixing pin 12 is provided on the bracket 1, the transverse connecting rope 11 passes 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. As shown in Figures 1, 2, 3 and 4, when a large-sized rock falls on the surface of the protective net 2, the protective net 2 will pull the transverse connecting rope 11, and the transverse connecting rope 11 drives the transverse damper 13 to work, providing tension to the protective net 2, thereby buffering the impact force brought by the large-sized rockfall until it is offset, and the transverse damper 13 is compressed to the maximum value and begins to rebound, thereby providing the transverse connecting rope 11 and the protective net 2 with force in the opposite direction, so that the protective net 2 returns to its original state, thereby pushing away the large-sized rockfall, and the outer protective structure has the effect of automatic recovery, which greatly reduces the later maintenance cost of the shed hole and improves practicality.

As a further improvement to the utility model, the protective net 2 includes a group of meshes arranged in the transverse direction, two adjacent meshes are connected by means of a second fixing pin 14, and the second fixing pin 14 between the two adjacent meshes is mounted on the same longitudinal connecting rope 15, the length direction of the longitudinal connecting rope 15 is arranged in the longitudinal direction, and a longitudinal damper 16 is connected between the end of the longitudinal connecting rope 15 and the bracket 1. As shown in Figures 1 and 2, the protective net 2 adopts a multi-unit splicing structure, which is easy to replace in case of later damage and has low maintenance costs. When large-sized falling rocks fall on the surface of the protective net 2, the longitudinal damper 16 can also buffer the impact force brought by the large-sized falling rocks until it is offset. 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 state, thereby pushing away the large-sized falling rocks. The longitudinal damper 16 has a better buffering effect together with the transverse damper 13.

As a further improvement of the present invention, the protection 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 structure, a supporting top plate 6-2 arranged in the positioning shell 6-1 and used to connect to the bracket 1, and a displacement rod 6-3 arranged below both ends of the supporting top plate 6-2 and forming a sliding fit with the positioning shell 6-1, and also includes an arc-shaped elastic structure 6-4 connected between the two displacement rods 6-3 and convex upward in the middle, the axial direction of the arc-shaped elastic structure 6-4 is the same as the axial direction of the displacement rod 6-3, the middle part of the arc-shaped elastic structure 6-4 is connected to the supporting top plate 6-2, and the two displacement rods 6-3 have the horizontal freedom of movement away from each other with the help of the downward pressure of the supporting top plate 6-2. As shown in Figures 1, 3, 7, 8, 9, 10 and 11, when the bracket 1 moves downward, it will drive the support top plate 6-2 to move downward, and the support top plate 6-2 will begin to squeeze the arc-shaped elastic structure 6-4. By designing the displacement rod 6-3, the arc-shaped elastic structure 6-4 is compressed, and the two displacement rods 6-3 move away from each other. When the arc-shaped elastic structure 6-4 is compressed and begins to recover, it drives the two displacement rods 6-3 to move closer to each other, and pushes the support top plate 6-2 to move upward, thereby driving the bracket 1 to rebound, bounce off the fallen rocks, and restore the shed hole to its original state. It can effectively play a buffering and restoring role, prevent the connection between the bracket 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.

As a further improvement of the utility model, the buffer structure also includes 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. As shown in Figures 7, 8, 10 and 11, both 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 downward, and 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 slides inside the positioning shell 6-1.

As a further improvement of the present invention, a long strip-shaped slide groove 6-6 is provided on the positioning shell 6-1 at a position corresponding to the displacement rod 6-3, which runs through the thickness direction thereof. The length direction of the slide 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 plugged into the slide groove 6-6 at the corresponding end and form a sliding fit. The buffer structure 6 also includes a limit plate 6-7 which is arranged outside the slide groove 6-6 and is detachably connected to the positioning shell 6-1. The two ends of the displacement rod 6-3 are respectively in contact with the limit plate 6-7 at the corresponding end. As shown in Fig. 8 and Fig. 9, the length directions of the front and rear displacement rods 6-3 are the same as the axial direction of the arc-shaped elastic structure 6-4. The length direction of the slide groove 6-6 is arranged along the front-to-back direction. The displacement rod 6-3 is clamped between the left and right limit plates 6-7, which does not affect the displacement rod 6-3 moving forward and backward in the slide groove 6-6, and can effectively prevent the displacement rod 6-3 from deviating in the left and right directions. The structure is simple, the connection is firm and reliable, and the disassembly and assembly are convenient and fast, saving time and effort.

As a further improvement of the present invention, the buffer structure 6 also includes a limit frame 6-8 disposed inside the positioning shell 6-1 and between the two ends of the displacement rod 6-3, and the displacement rod 6-3 is plugged into the limit frame 6-8 to form a sliding fit. As shown in Figures 7, 8, 9, 10 and 11, the limit frame 6-8 is provided with a through hole matching the shape of the slide slot 6-6, and the displacement rod 6-3 passes through the through hole, so that the limit frame 6-8 plays a role in supporting the displacement rod 6-3, which can prevent the displacement rod 6-3 from bending and deformation.

As a further improvement to the present invention, the number of the limiting frames 6-8 is at least two, all of which are arranged along the length direction of the displacement rod 6-3, and the arc-shaped elastic structure 6-4 is mounted on the displacement rod 6-3 and clamped between two adjacent limiting frames 6-8. As shown in Figures 7, 8, 9, 10 and 11, the limiting frame 6-8 not only supports the displacement rod 6-3, but also limits the arc-shaped elastic structure 6-4, thereby preventing the arc-shaped elastic structure 6-4 from deviating along the length direction of the displacement rod 6-3, and achieving a better buffering effect.

As a further improvement of the present invention, the number of arc-shaped elastic structures 6-4 is at least two, and all arc-shaped elastic structures 6-4 are arranged along the length direction of the displacement rod 6-3. As shown in Figures 8, 9 and 10, the two arc-shaped elastic structures 6-4 jointly play the role of supporting the top plate 6-2, so that the force on the supporting top plate 6-2 is more balanced and the stability is better during the lifting process.

As a further improvement of the present utility model, the positioning shell 6-1 includes a fixed base 6-1-1, and baffles 6-1-2 arranged at both ends above the fixed base 6-1-1, the middle part of the baffle 6-1-2 is bent and extended outward to form a 凵-shaped structure, the baffle 6-1-2 is formed by welding steel plates, the shape of the supporting top plate 6-2 matches the shape of the baffle 6-1-2, the displacement rod 6-3 is located in the 凵-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 凵-shaped structure. As shown in Figures 7, 8 and 9, a holding space is formed between the 凵-shaped structure of the baffle 6-1-2 and the plate body at its end, which can prevent the displacement rod 6-3 from protruding outside the fixed base 6-1-1 and being damaged by bumps.

As a further improvement of 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, and the bottom of the protective plate 6-1-3 is connected to the fixed base 6-1-1. As shown in Figures 7 and 9, the front and rear baffles 6-1-2 are connected together by the protective plate 6-1-3, so that the connection between the baffle 6-1-2 and the fixed base 6-1-1 is more firm and reliable.

As a further improvement of the present invention, the baffle 6-1-2 is detachably connected to the fixed base 6-1-1. By removing the baffle 6-1-2, the internal arc-shaped elastic structure 6-4 can be maintained, which is more convenient.

As a further improvement of the utility model, a connecting bottom plate 17 is provided at the bottom of the outer side of each end of the baffle 6-1-2, and the connecting bottom plate 17 is located on the outer side of the side plate of the 凵-shaped structure. A through hole 18 is provided on the connecting bottom 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 with the screw hole. As shown in Figures 7, 8, 9, 10 and 11, connecting bottom plates 17 are provided at both left and right ends of the front and rear baffles 6-1-2, and the connecting bottom plate 17 is located in the accommodating space of the baffle 6-1-2 and at the corner of the fixed base 6-1-1. The connecting bottom plate 17 is locked together with the fixed base 6-1-1 by the locking bolt at the through hole 18, so that the baffle 6-1-2 and the fixed base 6-1-1 are locked together, and the connection is firm and reliable, and the disassembly and assembly are convenient and quick, saving time and effort.

When the utility model is used, the axis of the shed hole is arranged along the front-to-back direction, all the brackets 1 are arranged along the front-to-back direction outside the corrugated plate 8-1, the curved shape of the bracket 1 matches the curved shape of the shed hole, and the left and right ends of the bracket 1 are connected to the supporting top plate 6-2 at the corresponding end through the connecting plate 7. The length direction of the transverse connecting rope 11 is arranged along the left-to-right direction, and the length direction of the longitudinal connecting rope 15 is arranged along the front-to-back direction. The axes of the displacement rod 6-3 and the arc-shaped elastic structure 6-4 are both arranged along the left-to-right direction, and the front and rear baffles 6-1-2 are arranged on the fixed base 6-1-1, and each baffle 6-1-2 has a displacement rod 6-3, and each displacement rod 6-3 is clamped between the left and right limit plates 6-7, and each displacement rod 6-3 is equipped with a group of limit frames 6-8 arranged along its length direction, and the baffle 6-1-2 and the limit frame 6-8 are provided with a slide 6-6, and the length direction of the slide 6-6 is arranged along the front-to-back direction. The left and right arc-shaped elastic structures 6-4 are both mounted on the displacement rod 6-3 and clamped between two adjacent limit frames 6-8. Two front and rear pull rods 6-5 are fixed below the support top plate 6-2. The left and right arc-shaped elastic structures 6-4 are both located between the pull rods 6-5 and the support top plate 6-2. The fixed base 6-1-1 of the positioning shell 6-1 is connected to the base 9 by the locking bolts at the bottom plate 17, and the support top plate 6-2 is connected to the bracket 1.

When hit by large-sized falling rocks from the outside, the protective net 2, the lateral damper 13, and the longitudinal damper 16 can effectively play a blocking and buffering role, and the buffer structure 6 can effectively play a buffering and recovery role, effectively improving the protective effect. The inner corrugated plate 8-1 can block small-sized falling rocks, thereby ensuring the safety of vehicles traveling under the shed tunnel. Even if the protective net 2 cannot withstand sufficient impact force and is damaged, the inner corrugated plate 8-1 can provide secondary buffering, thereby ensuring the safety of vehicle driving. The inner protective structure 8 and the outer protective structure work together, and compared with the existing protective net 2 type shed tunnel structure, the anti-falling rock effect of the shed tunnel is improved, effectively blocking the falling of falling rocks, and improving the safety of vehicle driving.

When the bracket 1 moves downward, it will drive the support top plate 6-2 to move downward, and the support top plate 6-2 will begin to squeeze the arc elastic structure 6-4. By designing the slide slot 6-6 and the displacement rod 6-3, the arc elastic structure 6-4 is compressed, and the two displacement rods 6-3 move away from each other. When the arc elastic structure 6-4 is compressed and begins to recover, it drives the two displacement rods 6-3 to move closer to each other, and pushes the support top plate 6-2 to move upward, thereby driving the bracket 1 to rebound, bounce off the fallen rocks, and restore the shed hole to its original state. It can effectively play a buffering role, prevent the connection between the bracket 1 and the base 9 from breaking, and effectively play a protective role.

Claims (10)

1. The utility model provides a tunnel portal safety prevents falling stone protection system, includes inlayer protective structure (8), and base (9) be connected with inlayer protective structure (8) both ends, its 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) which are arranged outside the corrugated plates (8-1) in a longitudinal mode and a protection net (2) which is arranged between the two adjacent supports (1), and two ends of each support (1) are connected with bases (9) at corresponding ends respectively.

2. The tunnel portal safety and rockfall protection system according to claim 1, wherein: the inner layer protection structure (8) further comprises I-steel (8-3) arranged in the corrugated plate (8-1), wherein the I-steel (8-3) is positioned at the inner side of a wave crest of the corrugated plate (8-1) and is attached to the outer end face of the I-steel (8-3).

3. The tunnel portal safety and rockfall protection system according to claim 1, wherein: 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 with an inner layer protection structure (8), the protection net (2) is connected with 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 with a buffer structure (6).

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

5. A tunnel portal safety anti-rock fall protection system according to claim 3, wherein: the outer protective structure further comprises bottom supporting frames (3) which are arranged on two sides of the inner arc-shaped rod (1-2) and connected with the corrugated plates (8-1), and top cover plates (4) which are detachably connected with the bottom supporting frames (3), wherein the top cover plates (4) are provided with placing grooves (5) towards one side of the inner arc-shaped rod (1-2), and the placing grooves (5) of the two top cover plates (4) are spliced to form mounting grooves of the inner arc-shaped rod (1-2).

6. A tunnel portal safety anti-rock fall protection system according to claim 3, wherein: the inner arc-shaped rod (1-2) and the outer arc-shaped rod (1-1) are identical in structure and comprise a group of rod bodies, the same ends of the inner rod body and the outer rod body are connected with the same connecting plate (7), the adjacent two connecting plates (7) are attached and connected by means of fasteners, and the connecting plate (7) at the end part is connected with the buffer structure (6).

7. The tunnel portal safety and rockfall protection system according to claim 1, wherein: the protection system further comprises a buffer structure (6) connected between the support (1) and the base (9), the buffer structure (6) comprises a positioning shell (6-1) which is used for being connected with the upper end face of the base (9) and is of an opening structure at the top, a supporting top plate (6-2) which is arranged in the positioning shell (6-1) and is used for being connected with the support (1), displacement rods (6-3) which are arranged below two ends of the supporting top plate (6-2) and form sliding fit with the positioning shell (6-1), and further comprises an arc-shaped elastic structure (6-4) which is connected between the two displacement rods (6-3) and is upwards protruded in the middle, the axis direction of the arc-shaped elastic structure (6-4) is the same as the axis direction of the displacement rods (6-3), the middle of the arc-shaped elastic structure (6-4) is connected with the supporting top plate (6-2), and the two displacement rods (6-3) have horizontal movement degrees of freedom which are far away from each other by means of the lower pressing of the supporting top plate (6-2).

8. The tunnel portal safety and rockfall protection system according to claim 7, wherein: the buffer structure (6) further comprises a pull rod (6-5) arranged at the bottom of the supporting top plate (6-2), and the arc-shaped elastic structure (6-4) is inserted between the pull rod (6-5) and the supporting top plate (6-2).

9. The tunnel portal safety and rockfall protection system according to claim 7, wherein: a long sliding groove (6-6) penetrating through the thickness direction of the positioning shell (6-1) is formed in a position corresponding to the displacement rod (6-3), the length direction of the sliding groove (6-6) is perpendicular to the length direction of the displacement rod (6-3), two ends of the displacement rod (6-3) are respectively inserted into the sliding groove (6-6) at the corresponding end and form sliding fit, the buffer structure (6) further comprises a limiting plate (6-7) arranged on the outer side of the sliding groove (6-6) and detachably connected with the positioning shell (6-1), and two ends of the displacement rod (6-3) are respectively contacted with the limiting plate (6-7) at the corresponding end.

10. The tunnel portal safety and rockfall protection system according to claim 7, wherein: the buffer structure (6) further comprises a limiting frame (6-8) which is arranged inside the positioning shell (6-1) and located between two ends of the displacement rod (6-3), and the displacement rod (6-3) is spliced with the limiting frame (6-8) to form sliding fit.