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

Tunnel portal safety anti-falling stone protection system

Technical Field

The utility model relates to the technical field of shed tunnels, in particular to a tunnel portal safety anti-falling stone protection system.

Background

Shed tunnel is a shed-type tunnel, and is generally constructed on road sections with multiple falling rocks (or possibly collapse) to protect the safety of running vehicles or pedestrians, and is generally provided with steel protection net racks for protecting when a shed is at a hole outlet, and mainly comprises a supporting frame and a protection net, and lacks blocking measures for small-size falling rocks to influence the running safety.

Disclosure of utility model

The utility model provides a tunnel portal safety falling-stone prevention protection system, which solves the problems that in the related art, a steel protection net frame mainly consists of a support frame and a protection net, and a blocking measure for small-size falling stones is lacked, so that the driving safety is influenced.

The technical scheme of the utility model is as follows: the utility model provides a tunnel portal safety prevents falling stone protection system, includes inlayer protective structure, and the base of being connected with inlayer protective structure both ends, and the key lies in: 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 further 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 a base of the corresponding end.

The inner layer protection structure further comprises I-steel arranged inside the corrugated plate, wherein the I-steel is located on the inner side of a wave crest of the corrugated plate, and the wave crest is attached to the outer end face of the I-steel.

The support comprises an outer arc-shaped rod, an inner arc-shaped rod and a support column connected between the outer arc-shaped rod and the inner arc-shaped rod, wherein the inner arc-shaped rod is connected with an inner layer protection structure, the protection net is connected with the outer arc-shaped rod, and the ends of the outer arc-shaped rod and the inner arc-shaped rod are connected with a buffer structure.

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

The outer protective structure further comprises bottom supporting frames arranged on two sides of the inner arc-shaped rod and connected with the corrugated plates, and top cover plates detachably connected with the bottom supporting frames, wherein one side of each top cover plate, facing the inner arc-shaped rod, is provided with a placing groove, and the placing grooves of the two top cover plates are spliced to form a mounting groove of the inner arc-shaped rod.

The inner arc rod and the outer arc rod 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, the adjacent two connecting plates are attached and connected by means of fasteners, and the connecting plate at the end part is connected with the buffer structure.

The protection system further comprises a buffer structure connected between the support and the base, the buffer structure comprises a positioning shell, a supporting top plate and displacement rods, wherein the positioning shell is used for being connected with the upper end face of the base, the top of the positioning shell is of an opening structure, the supporting top plate is arranged in the positioning shell and used for being connected with the support, the displacement rods are arranged below two ends of the supporting top plate and form sliding fit with the positioning shell, the buffer structure further comprises an arc-shaped elastic structure, the arc-shaped elastic structure is connected between the two displacement rods and protrudes upwards in the middle, the axis direction of the arc-shaped elastic structure is identical to that of the displacement rods, the middle of the arc-shaped elastic structure is connected with the supporting top plate, and the two displacement rods are pressed downwards by the supporting top plate to have the degree of freedom of horizontal movement far away from each other.

The buffer structure also comprises 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.

The position corresponding to the displacement rod on the positioning shell is provided with a long-strip-shaped sliding groove penetrating through the thickness direction of the positioning shell, the length direction of the sliding groove is perpendicular to the length direction of the displacement rod, two ends of the displacement rod are respectively spliced with the sliding groove at the corresponding end to form sliding fit, the buffer structure further comprises a limiting plate which is arranged outside the sliding groove and detachably connected with the positioning shell, and two ends of the displacement rod are respectively contacted with the limiting plate at the corresponding end.

The buffer structure further comprises a limiting frame arranged inside the positioning shell and located between two ends of the displacement rod, and the displacement rod is spliced with the limiting frame to form sliding fit.

The working principle and the beneficial effects of the utility model are as follows: 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 outer layer protection structure comprises a group of supports which are erected outside the corrugated plates and are longitudinally arranged, and a protective net which is erected between the two adjacent supports, and two ends of each support are respectively connected with a base at the corresponding end. When being impacted by external large-size falling rocks, the protective net can effectively play a role in blocking and buffering, and effectively improve the protective effect. The corrugated plate of the inner layer can realize the blocking of small-size falling rocks, thereby ensuring the safety of vehicles running under the shed tunnel. Even if the protective net cannot bear enough impact force to be damaged, the corrugated plate of the inner layer can provide secondary buffering, so that the driving safety of the vehicle is ensured. The combined action of the inner layer protection structure and the outer layer protection structure is compared with the existing protection network type shed tunnel structure, the anti-falling stone effect of the shed tunnel is improved, falling stones are effectively prevented from falling, and the safety of vehicle running is improved.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 is a schematic view of a structure of one direction of the present utility model.

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 view of another direction of the present utility model.

Fig. 5 is an enlarged view of C in fig. 4.

FIG. 6 is a schematic diagram of a connection structure between a support and an inner protective structure according to the present utility model.

FIG. 7 is a schematic diagram of a buffer structure according to one aspect of the present utility model.

FIG. 8 is a schematic view of another direction of the buffer structure according to the present utility model.

FIG. 9 is a schematic diagram of the internal structure of the buffer structure according to the present utility model.

FIG. 10 is a perspective view of the connection of the arcuate spring structure to the support top plate, displacement rod, and stop in accordance with the present utility model.

FIG. 11 is a main view of the connection of the arc-shaped elastic structure, the supporting top plate, the displacement rod and the limiting frame in the utility model.

In the figure: 1. the support, 1-1, outer arc pole, 1-2, inner arc pole, 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, standing 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 roof, 6-3, displacement rod, 6-4, arc elastic structure, 6-5, pull rod, 6-6, chute, 6-7, limiting plate, 6-8, limiting frame, 7, connecting plate, 8, inner protection structure, 8-1, corrugated plate, 8-2, connecting flange, 8-3, I-steel, 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 floor, 18, through hole.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present utility model, are intended to be encompassed within the scope of the present utility model.

The embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, a tunnel portal safety anti-falling stone protection system comprises an inner layer protection structure 8 and bases 9 connected with two ends of the inner layer protection structure 8, wherein 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 erected outside the corrugated plates 8-1 and are longitudinally arranged, and a protection net 2 which is erected between the two adjacent supports 1, and two ends of each support 1 are respectively connected with the bases 9 at corresponding ends.

As a further improvement of the utility model, the inner layer protection structure 8 also 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 the wave crest of the corrugated plate 8-1 and the wave crest is attached to the outer end surface of the I-steel 8-3. As shown in FIG. 6, the I-steel 8-3 is utilized to provide the inner protective structure 8 with a sufficiently high strength and load-bearing capacity as a whole.

As a further improvement of the present utility model, the bracket 1 includes 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 both connected with a buffer structure 6. As shown in fig. 1, 2 and 3, the length directions of the outer arc-shaped rod 1-1 and the inner arc-shaped rod 1-2 are all set along the left-right direction, and the front side and the rear side of the protection net 2 are respectively connected with the outer arc-shaped rod 1-1 on the corresponding side, so that a large enough buffer space is reserved between the protection net 2 and the corrugated plate 8-1 of the inner layer protection structure 8, and when falling rocks fall onto the protection net 2, the protection net 2 can have a large enough deformation space to effectively play a role in buffering.

As a further improvement of the utility model, the number of the inner arc-shaped rods 1-2 is at least two, all the inner arc-shaped rods 1-2 are arranged along the longitudinal direction, and a support column 1-3 is connected between each inner arc-shaped rod 1-2 and each outer arc-shaped rod 1-1. As shown in fig. 1, 2, 3, 4 and 5, the number of the inner arc rods 1-2 is preferably two, the two inner arc rods 1-2 are arranged along the front-back direction, the upper ends of the inner support column 1-3 and the outer support column 1-3 are connected with the outer arc rod 1-1, the lower ends of the inner support column 1-3 and the outer support column 1-3 are respectively connected with the inner arc rod 1-2 on the inner side and the inner arc rod 1-2 on the outer side to form a triangular support structure, so that the compression resistance of the support 1 can be improved, and the stability of the support 1 is enhanced.

As a further improvement of the present utility model, the outer protective structure further includes a bottom supporting frame 3 disposed at both sides of the inner arc-shaped rod 1-2 and connected with the corrugated plate 8-1, and a top cover plate 4 formed to be detachably connected with the bottom supporting frame 3, a placement groove 5 is disposed at one side of the top cover plate 4 facing the inner arc-shaped rod 1-2, and the placement grooves 5 of the two top cover plates 4 are spliced to form an installation groove of the inner arc-shaped rod 1-2. As shown in fig. 1, 2, 4 and 6, the inner arc-shaped rod 1-2 is clamped in the placing grooves 5 of the front top cover plate 4 and the rear top cover plate 4, so that the connection is firm and reliable, the stability is good, the top cover plate 4 and the bottom supporting frame 3 can be detached, and the top cover plate 4 can be disassembled conveniently.

As a further improvement of the utility model, the inner arc-shaped rod 1-2 and the outer arc-shaped rod 1-1 have the same 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 a fastener, and the connecting plate 7 at the end part is connected with the buffer structure 6. As shown in fig. 1, 2, 3 and 4, the inner arc rod 1-2 and the outer arc rod 1-1 are formed by splicing a plurality of rod bodies, and the fasteners can be detached at a later stage to be partially replaced, so that the maintenance cost can be reduced.

As a further improvement of the present utility model, the bottom bracket 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 layer guard structure 8, the two inner support plates 3-2 being arranged in the longitudinal direction, the top cover plate 4 being formed to be detachably connected to the outer support plate 3-1, the outer support plate 3-1 being welded to the two inner support plates 3-2. As shown in fig. 6, the front and rear inner support plates 3-2 are reliably connected with the corrugated plates 8-1 of the inner protective structure 8, so that the outer support plates 3-1 are reliably connected with the corrugated plates 8-1, a stable supporting effect is achieved on the top cover plate 4 and the inner arc-shaped rods 1-2, and the top cover plate 4 is detachable from the outer support plates 3-1, so that the inner arc-shaped rods 1-2 can be conveniently disassembled, assembled and maintained.

As a further development of the utility model, the top cover plate 4 is formed in a detachable connection with the bottom bracket 3 by means of mounting bolts 10. As shown in fig. 1, 2, 4 and 6, the top cover plate 4 and the bottom supporting frame 3 are connected together by using the mounting bolts 10, so that the connection is firm and reliable, the disassembly and the assembly are convenient and quick, and the time and the labor are saved.

As a further improvement of the utility model, the two sides of the protective net 2 are connected with transverse connecting ropes 11, the bracket 1 is provided with a first fixing pin 12, the transverse connecting ropes 11 penetrate through the first fixing pin 12, and a transverse damper 13 is connected between the end part of the transverse connecting ropes 11 and the bracket 1. As shown in fig. 1, fig. 2, fig. 3 and fig. 4, when the large-size falling stone is crashed and falls on the surface of the protective net 2, the protective net 2 can pull the transverse connection rope 11, the transverse connection rope 11 drives the transverse damper 13 to work, tension is provided for the protective net 2, so that impact force caused by the large-size falling stone is buffered until offset, the transverse damper 13 is compressed to the maximum value, rebound starts, and accordingly, the force in the opposite direction of the transverse connection rope 11 and the protective net 2 is provided, so that the protective net 2 is restored to the original state, the large-size falling stone is pushed away, the outer protective structure has an automatic restoration effect, the later maintenance cost of a shed tunnel is greatly reduced, and the practicability is improved.

As a further improvement of the present utility model, the protection net 2 comprises a group of meshes arranged along the transverse direction, two adjacent meshes are connected by means of a second fixing pin 14, the second fixing pins 14 between the two adjacent meshes are sleeved on the same longitudinal connecting rope 15, the longitudinal connecting rope 15 is longitudinally arranged along the length direction, and a longitudinal damper 16 is connected between the end part of the longitudinal connecting rope 15 and the bracket 1. As shown in fig. 1 and 2, the protection net 2 adopts a multi-unit splicing structure, and is easy to replace after damage and low in maintenance cost. When the large-size falling stone is crashed and falls on the surface of the protective net 2, the longitudinal damper 16 can buffer the impact force caused by the large-size falling stone until the impact force is counteracted, and the longitudinal damper 16 can provide the force in the opposite direction of the longitudinal connecting rope 15 and the protective net 2 to restore the protective net 2, so that the large-size falling stone is pushed away. The longitudinal dampers 16 together with the transverse dampers 13 provide a better cushioning effect.

As a further improvement of the present utility model, the protection system further includes a buffer structure 6 connected between the support 1 and the base 9, the buffer structure 6 including a positioning case 6-1 for connection with an upper end surface of the base 9 and having an open-top structure, a support top plate 6-2 provided in the positioning case 6-1 for connection with the support 1, and displacement bars 6-3 provided under both ends of the support top plate 6-2 and forming a sliding fit with the positioning case 6-1, and further includes an arc-shaped elastic structure 6-4 connected between the two displacement bars 6-3 and having an upward convex middle, an axial direction of the arc-shaped elastic structure 6-4 being the same as an axial direction of the displacement bars 6-3, a middle of the arc-shaped elastic structure 6-4 being connected with the support top plate 6-2, the two displacement bars 6-3 having a degree of freedom of horizontal movement away from each other by a pressing down of the support top plate 6-2. As shown in fig. 1, 3, 7, 8, 9, 10 and 11, when the bracket 1 moves downwards, the supporting top plate 6-2 is driven to move downwards, the supporting top plate 6-2 begins to extrude the arc elastic structure 6-4, the arc elastic structure 6-4 is stressed and compressed by designing the displacement rods 6-3, the two displacement rods 6-3 are far away from each other, and when the arc elastic structure 6-4 is stressed and compressed to recover, the two displacement rods 6-3 are driven to approach each other, and the supporting top plate 6-2 is driven to move upwards, so that the bracket 1 is driven to rebound, and the falling rocks are sprung open, so that the shed tunnel is restored to the original state. Can effectively play the buffering restoration effect, prevent the junction fracture of support 1 and base 9, effectively play the guard action. The arcuate elastic structure 6-4 is preferably a compound arcuate structure.

As a further improvement of the utility model, the buffer structure also 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. As shown in fig. 7, 8, 10 and 11, two ends of the pull rod 6-5 are connected with the supporting top plate 6-2 through connecting bolts, the middle of the pull rod 6-5 is recessed downwards, the arc-shaped elastic structure 6-4 is inserted between the middle of the pull rod 6-5 and the supporting top plate 6-2, and the pull rod 6-5 is used for fixing the supporting top plate 6-2 so that the supporting top plate 6-2 slides in the positioning shell 6-1.

As a further improvement of the utility model, a long-strip-shaped chute 6-6 penetrating through the thickness direction of the positioning shell 6-1 is arranged at a position corresponding to the displacement rod 6-3, the length direction of the chute 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 chute 6-6 at the corresponding end and form sliding fit, the buffer structure 6 also comprises a limiting plate 6-7 arranged outside the chute 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. As shown in fig. 8 and 9, the length direction of the front displacement rod 6-3 and the rear displacement rod 6-3 are the same as the axis direction of the arc elastic structure 6-4, the length direction of the sliding chute 6-6 is set along the front-rear direction, the displacement rod 6-3 is clamped between the left limiting plate 6-7 and the right limiting plate 6-7, the front-rear movement of the displacement rod 6-3 in the sliding chute 6-6 is not affected, the displacement rod 6-3 can be effectively prevented from shifting along the left-right direction, the structure is simple, the connection is firm and reliable, the disassembly and the assembly are convenient and quick, and time and labor are saved.

As a further improvement of the present utility model, the buffer structure 6 further includes a limiting frame 6-8 disposed inside the positioning shell 6-1 and located between two ends of the displacement rod 6-3, and the displacement rod 6-3 is inserted into and forms a sliding fit with the limiting frame 6-8. As shown in fig. 7, 8, 9, 10 and 11, the limiting frame 6-8 is provided with a through hole matched with the shape of the sliding groove 6-6, and the displacement rod 6-3 passes through the through hole, so that the limiting frame 6-8 plays a role in supporting the displacement rod 6-3, and the bending deformation of the displacement rod 6-3 can be prevented.

As a further improvement of the utility model, the number of the limiting frames 6-8 is at least two, all the limiting frames 6-8 are arranged along the length direction of the displacement rod 6-3, and the arc-shaped elastic structure 6-4 is sleeved on the displacement rod 6-3 and clamped between two adjacent limiting frames 6-8. As shown in fig. 7, 8, 9, 10 and 11, the limiting frame 6-8 not only plays a role in supporting the displacement rod 6-3, but also plays a role in limiting the arc-shaped elastic structure 6-4, so that the arc-shaped elastic structure 6-4 can be prevented from shifting along the length direction of the displacement rod 6-3, and the buffering effect is better.

As a further improvement of the present utility model, the number of the 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. As shown in fig. 8, 9 and 10, the two arc-shaped elastic structures 6-4 jointly play a role of bearing the supporting top plate 6-2, so that the supporting top plate 6-2 is more balanced in stress and better in stability in the lifting process.

As a further improvement of the utility model, the positioning shell 6-1 comprises a fixed base 6-1-1 and baffle plates 6-1-2 arranged at two ends above the fixed base 6-1-1, the middle part of the baffle plates 6-1-2 is bent outwards to extend to form a U-shaped structure, the baffle plates 6-1-2 are formed by welding steel plates, the shape of a supporting top plate 6-2 is matched with that of the baffle plates 6-1-2, a displacement rod 6-3 is positioned in the U-shaped structure, and two ends of the displacement rod 6-3 are respectively in sliding fit with side plates at the corresponding ends of the U-shaped structure. As shown in fig. 7, 8 and 9, the U-shaped structure of the baffle 6-1-2 and the plate body at the end thereof form an accommodating space therebetween, so that the displacement rod 6-3 is prevented from protruding outside the fixed base 6-1-1 to be damaged by collision.

As a further improvement of the utility model, the positioning shell 6-1 also comprises a protection plate 6-1-3 connected between the same ends of the baffle plates 6-1-2, and the bottom of the protection plate 6-1-3 is connected with the fixed base 6-1-1. As shown in fig. 7 and 9, the front and rear baffles 6-1-2 are connected together by the guard plates 6-1-3, so that the connection between the baffles 6-1-2 and the fixed base 6-1-1 is more firm and reliable.

As a further improvement of the utility model, the baffle 6-1-2 is detachably connected with the fixed base 6-1-1. The baffle 6-1-2 is disassembled, so that the inner arc-shaped elastic structure 6-4 can be maintained more conveniently.

As a further improvement of the utility model, the bottom of the outer side of each end of the baffle plate 6-1-2 is provided with a connecting bottom plate 17, the connecting bottom plate 17 is positioned on the outer side of the side plate of the U-shaped structure, a through hole 18 is formed in the connecting bottom plate 17, a locking bolt is arranged at the through hole 18, a screw hole is formed in the fixed base 6-1-1, and the lower end of the locking bolt is in threaded connection with the screw hole. As shown in fig. 7, 8, 9, 10 and 11, connecting bottom plates 17 are arranged at the left end and the right end of the front baffle plate 6-1-2 and the rear baffle plate 2, the connecting bottom plates 17 are positioned in the accommodating space of the baffle plate 6-1-2 and positioned at the corners of the fixed base 6-1, and the connecting bottom plates 17 and the fixed base 6-1 are locked together by locking bolts at the through holes 18, so that the baffle plate 6-1-2 and the fixed base 6-1-1 are locked together, the connection is firm and reliable, the disassembly is convenient and quick, and the time and the labor are saved.

When the utility model is specifically used, the axis of the shed tunnel is arranged along the front-rear direction, all the brackets 1 are arranged along the front-rear direction outside the corrugated plates 8-1, the bending shape of the brackets 1 is matched with that of the shed tunnel, and the left end and the right end of the brackets 1 are respectively connected with the supporting top plates 6-2 at the corresponding ends through the connecting plates 7. The longitudinal direction of the lateral connecting cord 11 is set in the left-right direction, and the longitudinal direction of the longitudinal connecting cord 15 is set in the front-rear direction. The axes of the displacement rods 6-3 and the arc elastic structures 6-4 are arranged in the left-right direction, the fixed base 6-1 is provided with a front baffle plate and a rear baffle plate 6-1-2, each baffle plate 6-1-2 is provided with a displacement rod 6-3, each displacement rod 6-3 is clamped between the left limiting plate 6 and the right limiting plate 6-7, each displacement rod 6-3 is sleeved with a group of limiting frames 6-8 arranged in the length direction of the displacement rod, the baffle plates 6-1-2 and the limiting frames 6-8 are provided with sliding grooves 6-6, and the length direction of each sliding groove 6-6 is arranged in the front-rear direction. The left arc-shaped elastic structure 6-4 and the right arc-shaped elastic structure 4 are sleeved on the displacement rod 6-3 and clamped between the two adjacent limiting frames 6-8, a front pull rod 6-5 and a rear pull rod 6-5 are fixed below the supporting top plate 6-2, and the left arc-shaped elastic structure 6-4 and the right arc-shaped elastic structure 6-4 are positioned between the pull rods 6-5 and the supporting top plate 6-2. The fixed base 6-1-1 of the positioning shell 6-1 is connected with the base 9 through a locking bolt at the connecting bottom plate 17, and the supporting top plate 6-2 is connected with the bracket 1.

When being impacted by external large-size falling rocks, the protection net 2, the transverse damper 13 and the longitudinal damper 16 can effectively play a role in blocking and buffering, and the buffer structure 6 can effectively play a role in buffering and restoring, so that the protection effect is effectively improved. The corrugated plate 8-1 of the inner layer can realize the blocking of small-size falling rocks, thereby ensuring the safety of vehicles running under the shed tunnel. Even if the protection net 2 cannot withstand enough impact force to be damaged, the corrugated plate 8-1 of the inner layer can provide secondary buffering, thereby ensuring the safety of the vehicle running. The inner layer protection structure 8 and the outer layer protection structure coaction compares the current protection network 2 type shed tunnel structure, has promoted the anti-falling stone effect of shed tunnel, effectually has blockked falling of falling stone, has promoted the security that the vehicle was gone.

When the support 1 moves downwards, the support top plate 6-2 is driven to move downwards, the support top plate 6-2 starts to extrude the arc elastic structure 6-4, the arc elastic structure 6-4 is stressed and compressed through the design of the sliding groove 6-6 and the displacement rods 6-3, the two displacement rods 6-3 are far away from each other, when the stress compression of the arc elastic structure 6-4 is completed and the restoration is started, the two displacement rods 6-3 are driven to approach each other, and the support top plate 6-2 is driven to move upwards, so that the support 1 is driven to rebound, and the falling rocks are sprung out, so that the shed tunnel is restored to the original shape. Can effectively play the cushioning effect, prevent the junction fracture of support 1 and base 9, effectively play the guard action.

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.