CN110106784A - A kind of bridge guardrail structure - Google Patents
A kind of bridge guardrail structure Download PDFInfo
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- CN110106784A CN110106784A CN201910509417.3A CN201910509417A CN110106784A CN 110106784 A CN110106784 A CN 110106784A CN 201910509417 A CN201910509417 A CN 201910509417A CN 110106784 A CN110106784 A CN 110106784A
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- Prior art keywords
- bridge
- energy
- absorbing
- cylinder
- fixedly connected
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
Abstract
The present invention relates to bridge protection technology fields, disclose a kind of bridge guardrail structure, the two sides of bridge are set, bumping post including equidistantly distributed, the lower end of the bumping post is fixedly connected with the Steel Structure of bridge two sides, lateral protective plate is equipped between the inside of the bumping post, lateral protective plate is bolted with every bumping post, support rod is respectively and fixedly provided on the inside of the both ends of the bumping post, support column is equipped between the outer end of the support rod, the support column is equipped with guide roller, the end of the support column is equipped with attachment base, it is fixedly connected on the inside of the outer end of the support rod and attachment base, the inner end of support rod is fixedly connected with bumping post, it is fixedly connected between two neighboring attachment base by connecting plate.Protective performance of the present invention is good, and when vehicle collision bridge guardrail, guide roller has guidance, guiding role to vehicle, allows the vehicle to continue to move ahead along bridge edge and avoid going out outside bridge to greatest extent.
Description
Technical field
The present invention relates to bridge protection technology field more particularly to a kind of bridge guardrail structures.
Background technique
Bridge guardrail refers to the guardrail for being placed in bridge two sides, its purpose is to prevent vehicle out of control from running off outside bridge,
Have the function of preventing vehicle from breaking through, under wear, cross bridge and beautification bridge construction.Bridge is usually all using steel at present
Framework, the guardrail of bridge two sides generally use armored concrete and pour, however the stiff safety fence that armored concrete pours, and one
Aspect armored concrete weight is big, and bridge load is larger, and also inconvenience is repaired after damaging, therefore in order to mitigate bridge load
And be easily installed maintenance etc., present some bridges use metal protection column, i.e. metal bar is fixed on by metal-connecting seat
The two sides of bridge, however this Bridge guardrail anticollision ability is poor, when vehicle speed is very fast, directly severs metal bar
Afterwards, vehicle crashes into rivers, and car once hits the drink, and usually can all cause very big casualties.Such as 10.28 Chongqing it is public
Friendship falls over into the river accident, and the guardrail of the Second Yangtes River Bridge in Wanzhou City is very simple, crashworthiness is insufficient, and entire bus is gone out after guardrail falls over into the river and made
At very big casualties.
Such as Chinese patent Authorization Notice No. is CN207828778U, authorized announcement date 2018/9/7 discloses one kind
Bridge guardrail, including big column, railing and breast board unit, railing connect two adjacent big columns, two adjacent big columns
Between be equipped with the breast board units of one or more arrangeds, big column is top to the special-shaped column bent on the inside of bridge, and to
The end bent on the inside of bridge offers through-hole, and railing passes through the through-hole and connects two adjacent big columns.This kind of guardrail buffering is not
Have the effect of buffering energy-absorbing, is easy to break through guardrail after vehicle collision and crashes into river.
Summary of the invention
The present invention provides a kind of bridge guardrail to solve the above problem existing for Bridge guardrail in the prior art
Structure, this kind of bridge guardrail collection guiding, buffering energy-absorbing and one are able to guide vehicle edge when vehicle and bridge guardrail collision
Bridge floor edge continue to move ahead, while absorb perpendicular to bridge guardrail direction impact force, to prevent to greatest extent
Vehicle crashes into river, reduces the casualties in traffic accident.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of bridge guardrail structure, is arranged in the two sides of bridge, the bumping post including equidistantly distributed, the bumping post
Lower end be fixedly connected with the Steel Structure of bridge two sides, lateral protective plate is equipped between the inside of the bumping post, is laterally protected
Plate is bolted with every bumping post, is respectively and fixedly provided with support rod on the inside of the both ends of the bumping post, the support rod
Support column is equipped between outer end, the support column is equipped with guide roller, and the end of the support column is equipped with attachment base, the support
Be fixedly connected on the inside of the outer end of bar and attachment base, the inner end of support rod is fixedly connected with bumping post, two neighboring attachment base it
Between be fixedly connected by connecting plate.When the vehicle run at high speed is collided with this kind of bridge guardrail, front of the car trim by stem is tiltedly first touched
It bumps against on guide roller, the impact force of inclination of vehicle resolves into the component parallel with bridge guardrail (abbreviation parallel component) and bridge
The vertical component of beam protective fence (abbreviation vertical stress component), vehicle continues along guide roller to Forward under the action of parallel component
Dynamic, vertical stress component passes to bumping post by support rod to offset part vertical stress component, if collision is acutely, support rod can crumple
(deformation or fracture) energy-absorbing, vehicle continue by protective plate, bumping post obstruction without crashing into river；This kind of bridge guardrail
Longitudinal building multiple-protection hinders, and before continuing on bridge guardrail by guide roller guidance vehicle after impact force is decomposed
Into reducing traffic accident bring to prevent the vehicle of collision bridge guardrail from pouring guardrail and crash into river to greatest extent
Casualties.
Preferably, the guide roller includes outer cylinder, inner cylinder, several dowels, institute are equipped between the outer cylinder and inner cylinder
It states outer cylinder, inner cylinder, dowel to be an integral structure and be made of engineering plastics, the dowel is by the sky between inner cylinder and outer cylinder
Between be separated into several crumple energy-absorbing chambers.Guide roller itself is made of engineering plastics, and guide roller itself has preferable support strength,
Guiding role played to vehicle, and guide roller hit after its internal crumple energy-absorbing chamber crumple deformation also can energy-absorbing, from
And a part of vehicle normal impact power is absorbed, reduce the impact force that bumping post is subject to.
Preferably, the center of the inner cylinder is equipped with the support roller being rotatablely connected with support column, the circumference of the support roller
Face is equipped with several support rods, and energy-absorbing filler is filled at the position between adjacent two support rods.Guide roller is collided
Afterwards, crumple energy-absorbing chamber energy-absorbing, support rod deformation energy-absorbing, energy-absorbing filler squeeze energy-absorbing, absorb the impact force of vehicle, reduce vehicle
To the impact force of bumping post, prevent vehicle from severing bumping post and going out outside guardrail.
Preferably, the inside between adjacent two bumping posts is equipped with bumper post, the lower end of the bumper post is equipped with flange
Seat, the flange seat are fixedly connected with the built-in base of bridge two sides, and there are two the guide rollers on every support column, and support column is upper
Position between two guide rollers is equipped with left linking arm, right linking arm, the buffering on the left of the left linking arm and the support column
The medial surface of column is fixedly connected, and the right linking arm is fixedly connected with the medial surface of the bumper post on the right side of the support column.From it is interior to
It successively constructs support roller, bumper post, bumping post three outside to protect, step by step buffering energy-absorbing, so that the impact force that bumping post is subject to is aobvious
It writes and reduces, and then prevent vehicle from going out outside guardrail and falling over into the river.
Preferably, being fixed with energy-absorbing bar on the outside of the connecting plate, the outer end of the energy-absorbing bar passes through bumper post, described
Bumper post is in hollow square tube type, and the position on the energy-absorbing bar between connecting plate and bumper post is arranged with pressure spring.Vertically
Component acts on energy-absorbing bar, and energy-absorbing bar is displaced outwardly, and pressure spring compresses energy-absorbing.
Preferably, the outer sheath of the pressure spring is equipped with thin-walled protecting tube.Thin-walled protecting tube plays a protective role to pressure spring,
Prevent it is wet by the rain and burnt by the sun cause pressure spring to fail, while also can buffering energy-absorbing after thin-walled protecting tube crumple.
Preferably, the outside of the bumper post is equipped with energy-absorbing cylinder, the inner end of the energy-absorbing cylinder passes through U-shaped seat and bumper post
Two sides be fixedly connected, the disc springs equipped with several overlapping settings in the energy-absorbing cylinder, the center of the disc spring is equipped with cylinder sliding block,
The inner end of the cylinder sliding block is equipped with bulge loop, and the inner end center of the cylinder sliding block is equipped with pilot hole, the outer end of the energy-absorbing bar
It protrudes into pilot hole, the bottom center of the energy-absorbing cylinder is equipped with avoid holes, is equipped with waterproof cover in avoid holes.Energy-absorbing bar is one section mobile
Apart from when, pressure spring elder generation deformation energy-absorbing, energy-absorbing bar continue to move to push cylinder sliding block be displaced outwardly, cylinder sliding block compress disc spring it is secondary
Energy-absorbing.
Preferably, the attachment base includes anchor ear I, anchor ear II, anchor ear I, anchor ear II are bolted after fastening,
The both ends of the anchor ear I extend to form the first connection strap, and the both ends of the anchor ear II extend to form the second connection strap, and described first
Joint gap is formed between connection strap, the second connection strap, is connected in the connecting plate insertion joint gap with the first connection strap, second
Narrow bars are bolted.Modular construction is convenient in this kind connection, and is convenient for modular repair after local damage.
Preferably, the cross section of the transverse direction protective plate is C-shaped, the edge of the open side of lateral protective plate and buffering
The lateral surface of column is fixedly connected.The protective plate of cross section C-shaped has certain elastic deformation ability, can deformation energy-absorbing, i.e., it is slow
After column is rushed by biggish shock, impact force can also be absorbed by protective plate, reduce the impact force that bumping post is subject to.
Preferably, the circular in cross-section of the bumping post, the periphery of bumping post is equipped with axially distributed add
Strengthening tendons.The rigid of reinforcing rib increase bumping post itself.
Therefore, the present invention has the utility model has the advantages that after (1) vehicle and bridge guardrail collision, and guide roller can be to vehicle
Guiding role is played, allows the vehicle to continue on bridge edge traveling to greatest extent, gradually realizes ramp to stop；(2)
Triple protection systems, respectively guide roller protection, bumper post protection, bumping post protection are constructed from inside to outside, effectively prevent vehicle
It is outer and fall over into the river to go out bridge guardrail；(3) Multistage damping, energy-absorbing are constructed from inside to outside, on guide roller itself energy-absorbing, energy-absorbing bar
Pressure spring energy-absorbing, the disc spring energy-absorbing in energy-absorbing cylinder, support column crumple energy-absorbing, protective plate energy-absorbing so that outermost bumping post
Impact force by vehicle is substantially reduced, and collision rear anti-crash column is not easy to topple over, and then prevents vehicle from going out guardrail and falling over into the river.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the connection schematic diagram of energy-absorbing bar and bumper post.
Fig. 4 is the left view of Fig. 1.
Fig. 5 is the cross-sectional view of guide roller.
In figure: bridge 1, bumping post 2, reinforcing rib 200, Steel Structure 3, lateral protective plate 4, bumper post 5, flange seat 500, pre-
Bury seat 6, support rod 7, support column 8, guide roller 9, outer cylinder 90, inner cylinder 91, dowel 92, crumple energy-absorbing chamber 93, support roller 94, branch
Support rib 95, energy-absorbing filler 96, attachment base 10, anchor ear I 100, anchor ear II 101, the first connection strap 103, the second connection strap 102,
Joint gap 104, connecting plate 11, left linking arm 12, right linking arm 13, energy-absorbing bar 14, pressure spring 15, thin-walled protecting tube 16, energy-absorbing
Cylinder 17, U-shaped seat 18, disc spring 19, cylinder sliding block 20, bulge loop 21, pilot hole 22, avoid holes 23, waterproof cover 24.
Specific embodiment
Present invention will be further described below with reference to the accompanying drawings and specific embodiments:
A kind of bridge guardrail structure as shown in Figure 1, Figure 2 and Figure 4, is arranged in the two sides of bridge 1, including equidistantly divide
The bumping post 2 of cloth, the lower end of bumping post are fixedly connected with the Steel Structure 3 of bridge two sides, the circular in cross-section of bumping post, anticollision
The periphery of column is equipped with axially distributed reinforcing rib 200；It is equipped with lateral protective plate 4 between the inside of bumping post, adjacent two
Inside between root bumping post 2 is equipped with bumper post 5, and the lower end of bumper post is equipped with flange seat 500, and flange seat is pre- with bridge two sides
It buries seat 6 to be fixedly connected, built-in base is embedded in the concrete of bridge two sides；The cross section of lateral protective plate 4 is C-shaped, laterally protects
The edge of the open side of plate is fixedly connected with the lateral surface of bumper post, and lateral protective plate and every bumping post are connected by bolt
It connects；It is respectively and fixedly provided with support rod 7 on the inside of the both ends of bumping post, support column 8 is equipped between the outer end of support rod, support column is equipped with and leads
To roller 9, the end of support column is equipped with attachment base 10, is fixedly connected on the inside of the outer end of support rod and attachment base, support rod it is interior
End is fixedly connected with bumping post, is fixedly connected between two neighboring attachment base by connecting plate 11；Attachment base 10 includes anchor ear I
100, anchor ear II 101, anchor ear I, anchor ear II are bolted after fastening, and the both ends of anchor ear I extend to form the first connection strap
103, the both ends of anchor ear II extend to form the second connection strap 102, form joint gap between the first connection strap, the second connection strap
104, connecting plate insertion joint gap is interior to be bolted with the first connection strap, the second connection strap.
As shown in figures 2 and 5, guide roller 9 includes outer cylinder 90, inner cylinder 91, and several dowels 92 are equipped between outer cylinder and inner cylinder,
Outer cylinder, inner cylinder, dowel are an integral structure and are made of engineering plastics, and engineering plastics use ABS engineering plastic in the present embodiment
Expect (being also plastic alloy), the space between inner cylinder and outer cylinder is separated into several crumple energy-absorbing chambers 93 by dowel；Inner cylinder 91
Center is equipped with the support roller 94 that be rotatablely connected with support column 8, and the periphery of support roller is equipped with several support rods 95, and adjacent two
Energy-absorbing filler 96 is filled at position between root support rod, and energy-absorbing filler uses EVA particle in the present embodiment；Every support column
On guide roller there are two, the position being located between two guide rollers on support column is equipped with left linking arm 12, right linking arm 13, institute
It states left linking arm to be fixedly connected with the medial surface of the bumper post on the left of the support column, on the right side of the right linking arm and the support column
The medial surface of bumper post is fixedly connected.
As shown in figure 3, the outside of connecting plate 11 is fixed with energy-absorbing bar 14, the outer end of energy-absorbing bar passes through bumper post 5, bumper post
In hollow square tube type, the position on energy-absorbing bar between connecting plate and bumper post is arranged with pressure spring 15, the outer sheath of pressure spring
Equipped with thin-walled protecting tube 16；The outside of bumper post is equipped with energy-absorbing cylinder 17, and the inner end of energy-absorbing cylinder passes through U-shaped seat 18 and the two of bumper post
Side is fixedly connected, and the disc spring 19 equipped with several overlapping settings in energy-absorbing cylinder, the center of disc spring is equipped with cylinder sliding block 20, cylinder sliding block
Inner end be equipped with bulge loop 21, the inner end center of cylinder sliding block is equipped with pilot hole 22, and the outer end of energy-absorbing bar is protruded into pilot hole, energy-absorbing
The bottom center of cylinder is equipped with avoid holes 23, is equipped with waterproof cover 24 in avoid holes.
In conjunction with attached drawing, the principle of the present invention is as follows: this kind of bridge guardrail successively constructs triple protection systems from inside to outside,
Respectively guide roller protection system, bumper post protection system, bumping post protection system, it is not only independent between triple protection systems but also deposit
It is being associated with；When slight impact occurs for vehicle and bridge guardrail, front of the car trim by stem is tiltedly first collided on guide roller, and vehicle inclines
Oblique impact force decomposes parallel component, vertical stress component, and vehicle continues to move along under the action of parallel component along guide roller,
Vertical stress component is smaller, and a part of vertical stress component is directed to roller absorption, another vertical stress component is then directly supported bar counteracting；Work as vehicle
When stronger collision occurs with bridge guardrail, by the guide roller crumple deformation of direct collision, support rod can crumple (deformation
Or fracture) energy-absorbing, energy-absorbing bar is displaced outwardly, pressure spring compresses energy-absorbing, so that vertical direction toward impact power be absorbed, offset, vehicle is being oriented to
Horizontal component direction is being pressed against under the action of roller to continue to move ahead；When very strong collision occurs for vehicle and bridge guardrail, energy-absorbing
Bar displacement increases, and then drives cylinder sliding block mobile, by the disc spring energy-absorbing of multiple overlappings, if normal impact power further increases
When, bumper post pours out, lateral protective plate deforms energy-absorbing, finally makes outermost bumping post significant by the impact force of vehicle
Reduce, and bumping post self-strength is big, lower end is directly fixed with the Steel Structure on bridge again, and bumping post lower end is integrally poured
Enter in concrete, the vehicle after multiple energy-absorbing, damping is difficult to sever bumping post, to prevent collision bridge to greatest extent
The vehicle of protective fence pours guardrail and crashes into river, reduces traffic accident bring casualties.This kind of bridge guardrail also can be used
It is protected in the protection of sky way Dangerous Area and the two sides of overpass.
The above is only specific embodiments of the present invention, but technical characteristic of the invention is not limited thereto.It is any with this hair
Based on bright, to solve essentially identical technical problem, essentially identical technical effect is realized, made simple change, etc.
With replacement or modification etc., all it is covered by among protection scope of the present invention.
Claims (10)
1. a kind of bridge guardrail structure, is arranged in the two sides of bridge, the bumping post including equidistantly distributed, the bumping post
Lower end is fixedly connected with the Steel Structure of bridge two sides, characterized in that lateral protective plate is equipped between the inside of the bumping post, it is horizontal
It is bolted to protective plate and every bumping post, is respectively and fixedly provided with support rod, the branch on the inside of the both ends of the bumping post
Support column is equipped between the outer end of strut, the support column is equipped with guide roller, and the end of the support column is equipped with attachment base, institute
It states and is fixedly connected on the inside of the outer end and attachment base of support rod, the inner end of support rod is fixedly connected with bumping post, two neighboring company
It is fixedly connected between joint chair by connecting plate.
2. a kind of bridge guardrail structure according to claim 1, characterized in that the guide roller includes outer cylinder, inner cylinder,
Several dowels are equipped between the outer cylinder and inner cylinder, the outer cylinder, inner cylinder, dowel are an integral structure and by engineering plastics
It is made, the space between inner cylinder and outer cylinder is separated into several crumple energy-absorbing chambers by the dowel.
3. a kind of bridge guardrail structure according to claim 2, characterized in that the center of the inner cylinder is equipped with and support
The support roller of column rotation connection, the periphery of the support roller are equipped with several support rods, between adjacent two support rods
Position fill energy-absorbing filler.
4. a kind of bridge guardrail structure according to claim 1 or 2 or 3, characterized in that between adjacent two bumping posts
Inside be equipped with bumper post, the lower end of the bumper post is equipped with flange seat, and the flange seat and the built-in base of bridge two sides are fixed
Connection, there are two the guide rollers on every support column, be located on support column the position between two guide rollers be equipped with left linking arm,
Right linking arm, the left linking arm are fixedly connected with the medial surface of the bumper post on the left of the support column, the right linking arm with should
The medial surface of bumper post on the right side of support column is fixedly connected.
5. a kind of bridge guardrail structure according to claim 4, characterized in that be fixed with suction on the outside of the connecting plate
Energy bar, the outer end of the energy-absorbing bar pass through bumper post, and the bumper post is in hollow square tube type, are located at connection on the energy-absorbing bar
Position between plate and bumper post is arranged with pressure spring.
6. a kind of bridge guardrail structure according to claim 5, characterized in that the outer sheath of the pressure spring is equipped with thin-walled
Protecting tube.
7. a kind of bridge guardrail structure according to claim 5, characterized in that the outside of the bumper post is equipped with energy-absorbing
The inner end of cylinder, the energy-absorbing cylinder is fixedly connected by U-shaped seat with the two sides of bumper post, and several overlappings are equipped in the energy-absorbing cylinder and are set
The disc spring set, the center of the disc spring are equipped with cylinder sliding block, and the inner end of the cylinder sliding block is equipped with bulge loop, the cylinder sliding block
Inner end center is equipped with pilot hole, and the outer end of the energy-absorbing bar is protruded into pilot hole, and the bottom center of the energy-absorbing cylinder is equipped with evacuation
Hole, avoid holes are interior to be equipped with waterproof cover.
8. a kind of bridge guardrail structure according to claim 1, characterized in that the attachment base includes anchor ear I, embraces
Hoop II, anchor ear I, anchor ear II are bolted after fastening, and the both ends of the anchor ear I extend to form the first connection strap, and described armful
The both ends of hoop II extend to form the second connection strap, and joint gap, the company are formed between first connection strap, the second connection strap
It is bolted in fishplate bar insertion joint gap with the first connection strap, the second connection strap.
9. a kind of bridge guardrail structure according to claim 4, characterized in that the cross section of the transverse direction protective plate is in
C-shaped, the edge of the open side of lateral protective plate are fixedly connected with the lateral surface of bumper post.
10. a kind of bridge guardrail structure according to claim 1, characterized in that the cross section of the bumping post is in circle
The periphery of shape, bumping post is equipped with axially distributed reinforcing rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509417.3A CN110106784B (en) | 2019-06-13 | 2019-06-13 | Bridge protective fence structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509417.3A CN110106784B (en) | 2019-06-13 | 2019-06-13 | Bridge protective fence structure |
Publications (2)
| Publication Number | Publication Date |
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| CN110106784A true CN110106784A (en) | 2019-08-09 |
| CN110106784B CN110106784B (en) | 2021-03-05 |
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| CN201910509417.3A Active CN110106784B (en) | 2019-06-13 | 2019-06-13 | Bridge protective fence structure |
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Cited By (6)
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| CN110359369A (en) * | 2019-08-16 | 2019-10-22 | 郭海霞 | A kind of anticollision barrier of highway bridge |
| CN110965468A (en) * | 2019-12-23 | 2020-04-07 | 山东劳动职业技术学院（山东劳动技师学院） | Bridge guardrail |
| CN111764275A (en) * | 2020-07-15 | 2020-10-13 | 干青咏 | Bridge structure system |
| CN112695631A (en) * | 2020-12-24 | 2021-04-23 | 中建二局土木工程集团有限公司 | Bridge steel guardrail and construction method thereof |
| CN113106794A (en) * | 2021-05-26 | 2021-07-13 | 中南大学 | Train derailing rotary anti-collision barrel, derailing collision energy-absorbing protection device and collision energy-absorbing method |
| CN114645511A (en) * | 2022-03-03 | 2022-06-21 | 郑广元 | Anti-collision guardrail for road and bridge |
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| CN110359369A (en) * | 2019-08-16 | 2019-10-22 | 郭海霞 | A kind of anticollision barrier of highway bridge |
| CN110359369B (en) * | 2019-08-16 | 2021-07-06 | 山东冠县恒良管业有限公司 | Anti-collision guardrail for highway bridge |
| CN110965468A (en) * | 2019-12-23 | 2020-04-07 | 山东劳动职业技术学院（山东劳动技师学院） | Bridge guardrail |
| CN111764275A (en) * | 2020-07-15 | 2020-10-13 | 干青咏 | Bridge structure system |
| CN112695631A (en) * | 2020-12-24 | 2021-04-23 | 中建二局土木工程集团有限公司 | Bridge steel guardrail and construction method thereof |
| CN113106794A (en) * | 2021-05-26 | 2021-07-13 | 中南大学 | Train derailing rotary anti-collision barrel, derailing collision energy-absorbing protection device and collision energy-absorbing method |
| CN113106794B (en) * | 2021-05-26 | 2022-02-01 | 中南大学 | Train derailing rotary anti-collision barrel, derailing collision energy-absorbing protection device and collision energy-absorbing method |
| CN114645511A (en) * | 2022-03-03 | 2022-06-21 | 郑广元 | Anti-collision guardrail for road and bridge |
| CN114645511B (en) * | 2022-03-03 | 2023-08-25 | 韶关市富伟工程建设有限公司 | Anti-collision guardrail for road and bridge |
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