AU2020101635A4

AU2020101635A4 - Assembly type multistage flexible energy-dissipation height restriction barrier

Info

Publication number: AU2020101635A4
Application number: AU2020101635A
Authority: AU
Inventors: Yutong Liu; Xiaohong Long; Hui Luo; Xiaodong YIN
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2019-12-23
Filing date: 2020-08-03
Publication date: 2020-09-10
Anticipated expiration: 2028-08-03
Also published as: CN110847081A

Abstract

The present invention discloses an assembly type multistage flexible energy-dissipation height restriction barrier, which is arranged at the protected area or the traffic safety 5 management area, such as a road, bridge, tunnel, culvert, etc. The position of the height restriction barrier is selected according to the field situation. The height restriction barrier adopts an assembly type structure and is provided with multistage protections and a flexible energy-dissipation device, so as to reduce the maximum impact force on the vehicle. The first-stage protection is high-damping rubber energy-dissipation modules on thin-walled tube 10 cross beams. The second-stage protection is shear type damping supports. The third-stage protection is a man-made weak spot at a cross beam weak end flange on the thin-walled tube cross beams. The present invention can effectively stop the restricted vehicles, reduce the vehicle damage, avoid the personal casualty, and guarantee the road traffic safety and smoothness by utilizing the structure design having strong self-resetting capability, high energy 15 dissipation, light weight, modularization, convenience in replacement and maintenance, and assembly type full bolt connection. 1/3 DRAWINGS 25 26 27 20 2 7 24 24,~ /2 ',26 21 25r 22 2.3 11 12 15 12.14 1 1 /9 19' - 14 15 16152, 6 ' 13/ 7 40 17 107 "6 6' 8 9 69/ 4 3 4~ 3 -2V" FIG. 1 22 725 26 20 24,2" 24 22 " --23 2 21 22'5 -22 jq11 '23 1- 11 14 1Is 15 i 14 -19 6- "101 '171; 7 6 16 67 3 4 4, 3 FIG. 2

Description

1/3

DRAWINGS

25 26 27 20 27 24,~ 24 ',26 21 /2 25r 22 2.3 11 12 15 12.14 1 1 /9 19' - 14 15 16152,

6 ' 13/ 7 40 17 107 "6 6' 8 9 69/

4 3 4~ 3

-2V"

FIG. 1

22725 26 20 24,2" 24 22 " --23 2 21 22'5 -22 jq11 '23 1- 11 14 1Is 15 i 14 -19

6- "101 '171; 7 6 16 67

3 4 4, 3

FIG. 2

ASSEMBLY TYPE MULTISTAGE FLEXIBLE ENERGY-DISSIPATION HEIGHT RESTRICTION BARRIER

TECHNICAL FIELD The present invention belongs to the technical field of traffic facilities, relates to the height restriction barrier, and in particular, to an assembly type multistage flexible energy-dissipation height restriction barrier.

BACKGROUND To strengthen the protection and the traffic safety management of a road, bridge, tunnel, culvert, etc., the traffic management department implements some restriction measures to stop the oversize, heavy-duty, or over-height vehicles to pass through these protected areas. Generally, the height restriction barriers are mounted at the entrances of these protected areas to protect them and guarantee the traffic safety. However, accidents usually happen to the existing height restriction barrier because of heavy traffic, weak safety awareness, poor publicity for height restriction and design defects in the height restriction barrier. The main problems and defects in the prior art are as follows: In view of the design defects in the existing height restriction barrier, the simple structure which basically adopts the fixed rigid portal frame or the steel truss is easy to cut off the vehicle roof, once an over-size or over-height vehicle is in collision with the height restriction barrier. Meanwhile, the damaged vehicle and traffic accident can cause traffic interruption and bring a large economic loss; furthermore, the driver and the passengers in the vehicle may be seriously injured, even died. In some collisions, there are serious casualties, vehicle damage, and traffic interruptions, but the fixed rigid portal frame or truss structure is still intact, which brings the concerns of related personnel. The tragedy "Height Restriction Barrier Murder Case" happens across the country. The main reasons may be the irresponsible driver or the nonstandard height restriction sign set by the traffic management department. However, the people's life is invaluable. So, it is a key technical problem urgently to be solved in the world to develop a novel height restriction barrier which can reduce, even avoid, the generation of traffic accidents, effectively stop the restricted vehicles, reduce the vehicle damage, avoid the personal casualty, guarantee the road traffic safety, maintain the traffic smoothness, and avoid the secondary damage.

SUMMARY In view of the problems and defects in the prior art, the present invention provides an assembly type multistage flexible energy-dissipation height restriction barrier. The objective of the present invention is to obtain a novel height restriction barrier which can reduce, even avoid, the generation of traffic accidents, effectively stop the restricted vehicles, reduce the vehicle damage, avoid the personal casualty, guarantee the road traffic safety, maintain the traffic smoothness, and avoid the secondary damage by utilizing the method of multistage high-energy-dissipation, self-resetting flexible-protection, light-weight, change-prone module and an assembling full bolt connection structure. Therefore, the present invention adopts the following technical solution: An assembly type multistage flexible energy-dissipation height restriction barrier is arranged at the protected area or the traffic safety management area, such as a road, bridge, tunnel, culvert, etc. The position of the height restriction barrier is selected according to the field situation. The height restriction barrier adopts an assembly type structure and is provided with multistage protections and a flexible energy-dissipation device, so as to reduce the maximum impact force on the vehicle. Preferably, the assembly type multistage flexible energy-dissipation height restriction barrier comprises vertical post tubular piles, tubular pile flanges, first-layer vertical posts, vertical post flanges, vertical post brackets, shear type damping supports, cross beam reinforcing end flanges, thin-walled tube cross beams, a cross beam weak end flange, second-layer vertical posts, connection bent tubes, a second-layer cross beam, bent tube bottom flanges, and bent tube top flanges. At the position of the height restriction barrier, one vertical post tubular pipe is respectively embedded in the two ends of the position according to a passage width. The whole height restriction barrier is arranged in a central symmetry manner in the width direction. The top of each vertical post tubular pipe and the bottom of the first-layer vertical post are connected by the tubular pile flange. The tubular pile flange is fixed by tubular pile flange bolts. The tubular pile flange and the bottom of the first-layer vertical post are reinforced by utilizing tubular pile flange reinforcing ribs. The top of the first-layer vertical post and the bottom of the second-layer vertical post are connected by utilizing the vertical post flange. The vertical post flange is fixed by the vertical post flange bolts. The vertical post flange and the first-layer vertical post as well as the second-layer vertical post are reinforced by utilizing vertical post flange reinforcing ribs. The shear type damping support is arranged at the overhanging portion of the vertical post flange. The suspending portion of the vertical post flange and the first-layer vertical post are reinforced by utilizing the vertical post bracket. A cross beam reinforcing end is arranged at the top of the shear type damping support. The cross beam reinforcing end and the shear type damping support are connected by a support rotating latch. The cross beam reinforcing end and the thin-walled tube cross beam are connected by the cross beam reinforcing end flange. The cross beam reinforcing end flange is fixed by cross beam reinforcing end flange bolts. The cross beam reinforcing end flange and the cross beam reinforcing end as well as the thin-walled tube cross beam are reinforced by cross beam reinforcing end flange reinforcing ribs. The two thin-walled tube cross beams are connected by the cross beam weak end flange. The cross beam weak end flange is fixed by the cross beam weak end flange bolts. The cross beam weak end flange and the thin-wall tube cross beams are reinforced by cross beam weak end flange reinforcing ribs. The second-layer vertical post and the second-layer cross beam are connected by the connection bent tube. The second-layer vertical post and the connection bent tube are connected by the bent tube bottom flange. The bent tube bottom flange is fixed by bent tube bottom flange bolts. The bent tube bottom flange and the connection bent tube as well as the second-layer vertical post are reinforced by the bent tube bottom flange reinforcing ribs. The second-layer cross beam and the connection bent tube are connected by the bent tube top flange. The bent tube top flange is fixed by bent tube top flange bolts. The bent tube top flange and the connection bent tube as well as the second-layer cross beam are reinforced by the bent tube top flange reinforcing ribs. Preferably, the foundation of the vertical post tubular pile is arranged at the bottom of the vertical post tubular pile. Under the action of the support rotating latch, the thin-walled tube cross beam and the shear type damping support cooperate to work. Preferably, a series of the same specification of high-damping rubber energy-dissipation modules is installed in the thin-walled tube cross beams. The high-damping rubber energy-dissipation modules and the thin-walled tube cross beams are firmly connected. The two adjacent high-damping rubber energy-dissipation modules keep a certain deformation distance. Preferably, the section of each high-damping rubber energy-dissipation module can be designed in different shapes, including the trapezoid, the rectangle, or the abnormal shape, according to requirements. The interior of each high-damping rubber energy-dissipation module has a cavity structure, such as a honeycomb-shaped structure, or a different-pattern structure. The high-damping rubber energy-dissipation module has excellent damping performance and energy dissipation effect, great durability and self-resetting capability, and high impact resistance. It utilizes the modular design to be mounted and replaced conveniently. The high-damping rubber energy-dissipation module effectively reduces the impact kinetic energy of the vehicle by its structure deformation to decelerate the vehicle. Moreover, the high-damping rubber energy-dissipation module is soft and has the large contact area, so as to be capable of effectively reducing the vehicle damage and deformation. Preferably, the height restriction barrier comprises multistage protections. The first-stage protection is the high-damping rubber energy-dissipation modules on the thin-walled tube cross beams. The second-stage protection is the shear type damping supports. The third-stage protection is a man-made weak spot at the cross beam weak end flange on the thin-walled tube cross beams. Preferably, the total length of the two thin-walled tube cross beams and the width of the road are the same or different according to requirements. The length of the second-layer cross beam and the width of the road are the same or different according to requirements. The length of each first-layer vertical post and the length of each second-layer vertical post are determined according to design requirements. Preferably, the tubular pile flange bolts, the vertical post flange bolts, the cross beam reinforcing end flange bolts, the bent tube bottom flange bolts, and the bent tube top flange bolts are high strength bolts. Therefore, the assembly type multistage flexible energy-dissipation height restriction barrier does not generate shear breakage under the intense impact of the vehicle. The cross beam weak end flange bolts are ordinary bolts. Therefore, the assembly type multistage flexible energy-dissipation height restriction barrier generates the shear breakage under the intense impact of the vehicle, avoiding the traffic interruption because the vehicle is locked in the height restriction barrier. Additionally, after the intense impact of the vehicle generates, the assembly type multistage flexible energy-dissipation height restriction barrier can be repaired only by changing the cross beam weak end flange bolts. The repair is convenient and quick. The support rotating latch arranged at the junction of the thin-walled tube cross beam and the shear type damping support can achieve a hinging function. After the weak spot of the thin-walled tube cross beam generates the shear fracture, the thin-walled tube cross beam can horizontally rotate in the driving direction, ensuring that the thin-walled tube cross beam does not fall down to interrupt the traffic. Preferably, a rotation limiting device is arranged at the shear type damping support, such that the rotation angle of the thin-walled tube cross beam after shear fracture is in the range of 0-90 degrees. Therefore, when the thin-walled tube cross beam after the shear fracture rotates to be in parallel with the driving direction, it can be locked by the rotation limiting device and does not generate the secondary damage on the vehicle or the people. The damping displacement of the shear type damping support is in the range of 0-0.5 m. The shear type damping support has the self-resetting capability, excellent damping performance, great durability, and convenience in mounting and replacing. Preferably, the height restriction barrier utilizes a full bolt connection manner and the modular design, and is used for achieving the integration of rapid machining, mounting and applying. Compared with the prior art, the present invention achieves the following beneficial effects: (1). The present invention can effectively provide an assembly type multistage flexible energy-dissipation height restriction barrier, which is arranged at the protected area or the traffic safety management area, such as a road, bridge, tunnel, culvert, etc. The height restriction barrier can reduce, even avoid, the generation of traffic accidents, effectively stop the restricted vehicles, reduce the vehicle damage, avoid the personal casualty, guarantee the road traffic safety, and maintain the traffic smoothness by utilizing the method of multistage high-energy-dissipation, self-resetting flexible-protection, light-weight, change-prone module and an assembling full bolt connection structure. (2). The present invention can effectively reduce the maximum impact force of the vehicle, reduce the instant acceleration of the vehicle, ensure that the top of the vehicle is not cut off, reduce the personal casualty, and avoid the secondary damage and traffic interruption by utilizing the multistage protection concept. The first-stage protection is the high-damping rubber energy-dissipation modules on the thin-walled tube cross beams. The second-stage protection is the shear type damping supports. The third-stage protection is the man-made weak spot at the cross beam weak end flange on the thin-walled tube cross beams. (3). The high-damping rubber energy-dissipation module of the present invention has excellent damping and energy dissipation performance, great durability and self-resetting capability, and high impact resistance. The cavity structure, such as a honeycomb-shaped structure, or a different-pattern structure of the interior of the high-damping rubber energy-dissipation module deforms and compresses to effectively absorb the impact kinetic energy of the vehicle, so as to achieve the damping and energy dissipation functions to the vehicle. The module has strong impact resistance and has remarkable braking effect to the vehicle. Furthermore, the high-damping rubber energy-dissipation module utilizes the modular design to be mounted and replaced conveniently. Moreover, the high-damping rubber energy-dissipation module is soft, and it has strong deformation capability and the large contact area with the vehicle, so as to be capable of effectively reducing the vehicle damage and deformation. (4). The damping displacement of the shear type damping support of the present invention is in the range of 0-0.5 m. The shear type damping support has the self-resetting capability, excellent damping performance, great durability, and convenient in mounting and replacing.

(5). The support rotating latch arranged at the junction of the thin-walled tube cross beam and the shear type damping support of the present invention achieves the hinging function. After the weak spot of the thin-walled tube cross beam generates the shear fracture, the thin-walled tube cross beam can horizontally rotate in the driving direction, ensuring that the thin-walled tube cross beam does not fall down to interrupt the traffic. (6). The rotation limiting device is arranged at the shear type damping support of the present invention, such that the rotation angle of the thin-walled tube cross beam after shear fracture is in the range of 0-90 degrees. Therefore, when the thin-walled tube cross beam after the shear fracture rotates to be in parallel with the driving direction, it can be locked by the rotation limiting device and then cannot generate the secondary damage to the vehicle or the people. (7). The assembly type vertical posts and the thin-walled tube cross beam of the present invention adopts the lightweight design, which is not only simple and beautiful, but also is convenient and quick to be mounted. (8). The present invention adopts the modular design and the full bolt connection manner so as to be capable of achieving the integration of rapid machining, mounting, and applying.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a stereo structure of an assembly type multistage flexible energy-dissipation height restriction barrier provided by the present invention. FIG. 2 is a front view of an assembly type multistage flexible energy-dissipation height restriction barrier provided by the present invention. FIG. 3 is a right view of an assembly type multistage flexible energy-dissipation height restriction barrier provided by the present invention. FIG. 4 is an enlarged view of a partial structure of an assembly type multistage flexible energy-dissipation height restriction barrier provided by the present invention. Description of reference signs: 1-vertical post tubular pile, 2-tubular pile flange, 3-tubular pile flange bolt, 4-tubular pile flange reinforcing rib, 5-first-layer vertical post, 6-vertical post flange, 7-vertical post flange bolt, 8-vertical post flange reinforcing rib, 9-vertical post bracket, 10-shear type damping support, 11-support rotating latch, 12-cross beam reinforcing end flange, 13-cross beam reinforcing end flange bolt, 14-cross beam reinforcing end flange reinforcing rib, 15-thin-walled tube cross beam, 16-cross beam weak end flange, 17-cross beam weak end flange bolt, 18-cross beam weak end flange reinforcing rib, 19-second-layer vertical post, 20-connection bent tube, 21-second-layer cross beam, 22-bent tube bottom flange, 23-bent tube bottom flange bolt, 24-bent tube bottom flange reinforcing rib, 25-bent tube top flange, 26-bent tube top flange bolt, and 27-bent tube top flange reinforcing rib.

DESCRIPTION OF THE EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The specific embodiments and description are merely used for explaining the present invention, but do not constitute limitations to the present invention. Embodiment As shown in FIG. 1 to FIG. 4, the present invention discloses an assembly type multistage flexible energy-dissipation height restriction barrier, which is arranged at the protected area or the traffic safety management area, such as a road, bridge, tunnel, culvert, etc. The height restriction barrier can reduce, even avoid, the generation of traffic accidents, effectively stop the restricted vehicles, reduce the vehicle damage, avoid the personal casualty, guarantee the road traffic safety, and maintain the traffic smoothness. The assembly type multistage flexible energy-dissipation height restriction barrier comprises vertical post tubular piles 1, tubular pile flanges 2, tubular pile flange bolts 3, tubular pile flange reinforcing ribs 4, first-layer vertical posts 5, vertical post flanges 6, vertical post flange bolts 7, vertical post flange reinforcing ribs 8, vertical post brackets 9, shear type damping supports 10, support rotating latches 11, cross beam reinforcing end flanges 12, cross beam reinforcing end flange bolts 13, cross beam reinforcing end flange reinforcing ribs 14, thin-walled tube cross beams 15, a cross beam weak end flange 16, cross beam weak end flange bolts 17, cross beam weak end flange reinforcing ribs 18, second-layer vertical posts 19, connection bent tubes 20, a second-layer cross beam 21, bent tube bottom flanges 22, bent tube bottom flange bolts 23, bent tube bottom flange reinforcing ribs 24, bent tube top flanges 25, bent tube top flange bolts 26, and bent tube top flange reinforcing ribs 27. The position of the height restriction barrier can be selected on the two sides of the road according to the field situation. The vertical post tubular pipes 1 are embedded in the selected position. The foundation of the vertical post tubular pile 1 is arranged at the bottom of the vertical post tubular pile 1. The top of the vertical post tubular pipe 1 and the bottom of the first-layer vertical post 5 are connected by the tubular pile flange 2. The tubular pile flange 2 is fixed by the tubular pile flange bolts 3. The tubular pile flange 2 and the bottom of the first-layer vertical post 5 are reinforced by utilizing the tubular pile flange reinforcing ribs 4. Thus, the first-layer vertical post 5 is firmly connected with the road. The top of the first-layer vertical post 5 and the bottom of the second-layer vertical post 19 are connected by utilizing the vertical post flange 6. The vertical post flange 6 is fixed by the vertical post flange bolts 7. The vertical post flange 6 and the first-layer vertical post 5 as well as the second-layer vertical post 19 are reinforced by utilizing the vertical post flange reinforcing ribs 8. The shear type damping support 10 is arranged at the overhanging portion of the vertical post flange 6. The suspending portion of the vertical post flange 6 and the first-layer vertical post 5 are reinforced by utilizing the vertical post bracket 9. A cross beam reinforcing end is arranged at the top of the shear type damping support 10. The cross beam reinforcing end and the shear type damping support 10 are connected by the support rotating latch 11. Under the action of the support rotating latch 11, the thin-walled tube cross beam 15 and the shear type damping support 10 cooperate to work. The cross beam reinforcing end and the thin-walled tube cross beam 15 are connected by the cross beam reinforcing end flange 12. The cross beam reinforcing end flange 12 is fixed by the cross beam reinforcing end flange bolts 13. The cross beam reinforcing end flange 12 and the cross beam reinforcing end as well as the thin-walled tube cross beam 15 are reinforced by the cross beam reinforcing end flange reinforcing ribs 14. The two thin-walled tube cross beams 15 are connected by the cross beam weak end flange 16. The cross beam weak end flange 16 is fixed by the cross beam weak end flange bolts 17. The cross beam weak end flange 16 and the thin-wall tube cross beams 15 are reinforced by the cross beam weak end flange reinforcing ribs 18. The second-layer vertical post 19 and the second-layer cross beam 21 are connected by the connection bent tube 20. The second-layer vertical post 19 and the connection bent tube 20 are connected by the bent tube bottom flange 22. The bent tube bottom flange 22 is fixed by bent tube bottom flange bolts 23. The bent tube bottom flange 22 and the connection bent tube 20 as well as the second-layer vertical post 19 are reinforced by the bent tube bottom flange reinforcing ribs 24. The second-layer cross beam 21 and the connection bent tube 20 are connected by the bent tube top flange 25. The bent tube top flange 25 is fixed by bent tube top flange bolts 26. The bent tube top flange 25 and the connection bent tube 20 as well as the second-layer cross beam 21 are reinforced by the bent tube top flange reinforcing ribs 27. A series of the same specification of high-damping rubber energy-dissipation modules is installed in the thin-walled tube cross beams 15. The high-damping rubber energy-dissipation modules and the thin-walled tube cross beams 15 are firmly connected, and the two adjacent high-damping rubber energy-dissipation modules keep a certain deformation distance. Not only that, the section of each high-damping rubber energy-dissipation module can be designed in different shapes, including the trapezoid, the rectangle, or the abnormal shape, according to requirements. The interior of each high-damping rubber energy-dissipation module has a cavity structure, such as a honeycomb-shaped structure, or a different-pattern structure.

The total length of the two thin-walled tube cross beams 15 and the width of the road are the same or different according to requirements. The length of the second-layer cross beam 21 and the width of the road are the same or different according to requirements. The length of each first-layer vertical post 5 and the length of each second-layer vertical post 19 are determined according to design requirements. The assembly type multistage flexible energy-dissipation height restriction barrier adopts the multistage-protection design concept, such that the maximum impact force of the vehicle can be reduced by about 51.1%. The first-stage protection is the high-damping rubber energy-dissipation modules on the thin-walled tube cross beams 15. The second-stage protection is the shear type damping supports 10. The third-stage protection is a man-made weak spot at the cross beam weak end flange 16 on the thin-walled tube cross beams 15. The assembly type multistage flexible energy-dissipation height restriction barrier obeys the design concept "strong post and weak beam" to artificially set the weak spot on the thin-walled tube cross beams 15. The tubular pile flange bolts 3, the vertical post flange bolts 7, the cross beam reinforcing end flange bolts 13, the bent tube bottom flange bolts 23, and the bent tube top flange bolts 26 are high strength bolts. Therefore, the assembly type multistage flexible energy-dissipation height restriction barrier does not generate shear breakage under the intense impact of the vehicle. The cross beam weak end flange bolts 17 are ordinary bolts. Therefore, the assembly type multistage flexible energy-dissipation height restriction barrier generates the shear breakage under the intense impact of the vehicle, avoiding the traffic interruption because the vehicle is locked in the height restriction barrier. Additionally, after the intense impact of the vehicle generates, the assembly type multistage flexible energy-dissipation height restriction barrier can be repaired only by changing the cross beam weak end flange bolts 17. The repair is convenient and quick. The support rotating latch 11 arranged at the junction of the thin-walled tube cross beam 15 and the shear type damping support 10 can achieve a hinging function. After the weak spot of the thin-walled tube cross beam 15 generates the shear fracture, the thin-walled tube cross beam 15 can horizontally rotate in the driving direction, ensuring that the thin-walled tube cross beam does not fall down to interrupt the traffic. A rotation limiting device is arranged at the shear type damping support 10, such that the rotation angle of the thin-walled tube cross beam 15 after shear fracture is in the range of 0-90 degrees. Therefore, when the thin-walled tube cross beam 15 after the shear fracture rotates to be in parallel with the driving direction, it can be locked by the rotation limiting device and then cannot generate secondary damage to the vehicle or the people. The damping displacement of the shear type damping support 10 is in the range of 0-0.5 m, and the shear type damping support has the self-resetting capability, excellent damping performance, great durability, and convenient in mounting and replacing. The modular design of the assembly type multistage flexible energy-dissipation height restriction barrier utilizes a full bolt connection manner and can achieve the integration of rapid machining, mounting, and applying. The high-damping rubber energy-dissipation module has excellent damping performance and energy dissipation effect, great durability and self-resetting capability, and high impact resistance. It utilizes the modular design to be mounted and replaced conveniently. The high-damping rubber energy-dissipation module effectively reduces the impact kinetic energy of the vehicle by its structure deformation to decelerate the vehicle. Moreover, the high-damping rubber energy-dissipation module is soft and has the large contact area, so as to be capable of effectively reducing the vehicle damage and deformation. The above merely describes preferred embodiments of the present invention, but is not used to limit the present invention. Any modifications, equivalent replacements, improvements and the like within the spirit and principle of the present invention shall be all contained in the protection scope of the present invention.

Claims

Claims WHAT IS CLAIMED IS:

1. An assembly type multistage flexible energy-dissipation height restriction barrier, which is arranged at the protected area or the traffic safety management area, such as a road, bridge, tunnel, culvert, etc.; wherein the position of the height restriction barrier is selected according to the field situation; the height restriction barrier adopts an assembly type structure and is provided with multistage protections and a flexible energy-dissipation device, so as to reduce the maximum impact force on the vehicle.

2. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 1, comprising vertical post tubular piles (1), tubular pile flanges (2), first-layer vertical posts (5), vertical post flanges (6), vertical post brackets (9), shear type damping supports (10), cross beam reinforcing end flanges (12), thin-walled tube cross beams (15), a cross beam weak end flange (16), second-layer vertical posts (19), connection bent tubes (20), a second-layer cross beam (21), bent tube bottom flanges (22), and bent tube top flanges (25);

at the position of the height restriction barrier, one vertical post tubular pipe (1) is respectively embedded in the two ends of the position according to a passage width; the whole height restriction barrier is arranged in a central symmetry manner in the width direction; the top of each vertical post tubular pipe (1) and the bottom of the first-layer vertical post (5) are connected by the tubular pile flange (2); the tubular pile flange (2) is fixed by tubular pile flange bolts (3); the tubular pile flange (2) and the bottom of the first-layer vertical post (5) are reinforced by utilizing tubular pile flange reinforcing ribs (4);

the top of the first-layer vertical post (5) and the bottom of the second-layer vertical post (19) are connected by utilizing the vertical post flange (6); the vertical post flange (6) is fixed by the vertical post flange bolts (7); the vertical post flange (6) and the first-layer vertical post (5) as well as the second-layer vertical post (19) are reinforced by utilizing vertical post flange reinforcing ribs (8);

the shear type damping support (10) is arranged at the overhanging portion of the vertical post flange (6); the suspending portion of the vertical post flange (6) and the first-layer vertical post (5) are reinforced by utilizing the vertical post bracket (9); a cross beam reinforcing end is arranged at the top of the shear type damping support (10); the cross beam reinforcing end and the shear type damping support (10) are connected by a support rotating latch (11);

the cross beam reinforcing end and the thin-walled tube cross beam (15) are connected by the cross beam reinforcing end flange (12); the cross beam reinforcing end flange (12) is fixed by cross beam reinforcing end flange bolts (13); the cross beam reinforcing end flange (12) and the cross beam reinforcing end as well as the thin-walled tube cross beam (15) are reinforced by cross beam reinforcing end flange reinforcing ribs (14); the two thin-walled tube cross beams (15) are connected by the cross beam weak end flange (16); the cross beam weak end flange (16) is fixed by cross beam weak end flange bolts (17); the cross beam weak end flange (16) and the thin-wall tube cross beams (15) are reinforced by cross beam weak end flange reinforcing ribs (18); the second-layer vertical post (19) and the second-layer cross beam (21) are connected by the connection bent tube (20); the second-layer vertical post (19) and the connection bent tube (20) are connected by the bent tube bottom flange (22); the bent tube bottom flange (22) is fixed by bent tube bottom flange bolts (23); the bent tube bottom flange (22) and the connection bent tube (20) as well as the second-layer vertical post (19) are reinforced by bent tube bottom flange reinforcing ribs (24); the second-layer cross beam (21) and the connection bent tube (20) are connected by the bent tube top flange (25); the bent tube top flange (25) is fixed by bent tube top flange bolts (26); the bent tube top flange (25) and the connection bent tube (20) as well as the second-layer cross beam (21) are reinforced by bent tube top flange reinforcing ribs (27).

3. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 2, wherein the foundation of the vertical post tubular pile (1) is arranged at the bottom of the vertical post tubular pile (1); under the action of the support rotating latch (11), the thin-walled tube cross beam (15) and the shear type damping support (10) cooperate to work.

4. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 2, wherein a series of the same specification of high-damping rubber energy-dissipation modules sleeve the thin-walled tube cross beams (15); the high-damping rubber energy-dissipation modules and the thin-walled tube cross beams (15) are firmly connected.

5. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 4, wherein the section of each high-damping rubber energy-dissipation module can be designed in different shapes, including the trapezoid, the rectangle, or the abnormal shape, according to requirements; the interior of each high-damping rubber energy-dissipation module has a cavity structure, such as a honeycomb-shaped structure, or a different-pattern structure.

6. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 4, which comprises multistage protections, wherein the first-stage protection is the high-damping rubber energy-dissipation modules on the thin-walled tube cross beams (15); the second-stage protection is the shear type damping supports (10); the third-stage protection is a man-made weak spot at the cross beam weak end flange (16) on the thin-walled tube cross beams (15).

7. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 2, wherein the total length of the two thin-walled tube cross beams (15) and the width of the road are the same or different according to requirements; the length of the second-layer cross beam (21) and the width of the road are the same or different according to requirements; the length of each first-layer vertical post (5) and the length of each second-layer vertical post (19) are determined according to design requirements.

8. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 2, wherein the tubular pile flange bolts (3), the vertical post flange bolts (7), the cross beam reinforcing end flange bolts (13), the bent tube bottom end flange bolts (23), and the bent tube top end flange bolts (26) are high strength bolts; the cross beam weak end flange bolts (17) are ordinary bolts.

9. The assembly type multistage flexible energy-dissipation height restriction barrier according to claim 2, wherein a rotation limiting device is arranged at the shear type damping support (10), such that the rotation angle of the thin-walled tube cross beam (15) after shear fracture is in the range of 0-90 degrees; the damping displacement of the shear type damping support (10) is in the range of 0-0.5 m, and the shear type damping support has the self resetting capability.

10. The assembly type multistage flexible energy-dissipation height restriction barrier according to any one of claims 2 to 9, which utilizes a full bolt connection manner and the modular design, and is used for achieving the integration of rapid machining, mounting, and applying.