CN213805082U - Use multilayer guardrail structure of novel anti-blocking piece - Google Patents
Use multilayer guardrail structure of novel anti-blocking piece Download PDFInfo
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- CN213805082U CN213805082U CN202021625427.8U CN202021625427U CN213805082U CN 213805082 U CN213805082 U CN 213805082U CN 202021625427 U CN202021625427 U CN 202021625427U CN 213805082 U CN213805082 U CN 213805082U
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Abstract
The utility model discloses an use novel multilayer guardrail structure of preventing blockking, including novel block, wave form beam slab, stand, crossbeam, bolt of preventing. The novel block that prevents is quadrangle frame construction, novel block that prevents is above, below, preceding, the back side or welding stiffening rib, the wave form roof beam board passes through bolt accordant connection and sets up at novel block that prevents preceding, novel block that prevents the back or set up bolted connection spare, novel block that prevents the back passes through the bolt anchor with the stand and is connected, wave form roof beam board top or below or upper and lower side set up the crossbeam simultaneously, novel block that prevents the frame inside or fill energy-absorbing component, the crossbeam is through compression piece or lug connection anchor at fixed position, the stand top sets up the cap. The height of the guardrail plate can be ensured when the guardrail plate is impacted, and even the height of the guardrail plate is improved, so that the guardrail plate has better safety protection capability; the assembly is simple, and the pre-curing function is realized; the material consumption is reduced, and the construction cost is reduced.
Description
Technical Field
The utility model relates to a highway safety protection technical field particularly, relates to an use novel multilayer guardrail structure of preventing blockking.
Background
In recent years, the construction of highways in China is rapidly developed, the construction and operation of highways greatly facilitate the travel of the masses and the economic development of various places along the way, and the construction of traffic safety facilities, namely guardrails, is more and more emphasized with the improvement of the traffic safety awareness of people. The reasonable arrangement of the guardrails can play an important role in reducing the accident injury degree and saving the lives of passengers when a traffic accident happens, and high-grade waveform beam guardrails can be used in some special dangerous road sections in China at present.
The corrugated beam guardrail is a highway guardrail structure which is very common in highway application in China, has the advantages of easiness in installation and reasonable manufacturing cost, but has certain defects through years of application research findings of the highway guardrail: 1, after the vehicle is impacted, the guardrail plate is dragged by the upright post, so that the height of the guardrail plate is reduced, and the protection capability is greatly reduced; 2, the safety margin of the guardrail structure is insufficient, and a large vehicle often passes through the guardrail structure; 3 some wave form roof beam guardrail additional strengthening cost are high, and most engineering can select the concrete guardrail when selecting high-grade guardrail, though abandon the view effect, but can play the cost-effective purpose.
In conclusion, according to the setting conditions of a newly-built road and a reconstructed and expanded road, in order to solve the application defect of the high-grade corrugated beam guardrail in the newly-built road and simultaneously consider the factors of convenient purchase, construction, cost reduction and the like, the multilayer guardrail structure applying the novel anti-blocking block is provided, and the structure can enable the corrugated beam guardrail to have higher protection capability after being optimized and reconstructed without increasing the cost in reconstruction and expansion projects.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an use novel multilayer guardrail structure of preventing blockking. The defects of low economy and long construction period of the existing high-grade corrugated beam guardrail in new construction and reconstruction and extension projects are overcome.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
a multilayer guardrail structure applying a novel anti-blocking block comprises the novel anti-blocking block, a corrugated beam plate, stand columns, cross beams and bolts, wherein the novel anti-blocking block is of a quadrilateral frame structure, the upper surface, the lower surface, the front surface, the back side edges or welding stiffening ribs of the novel anti-blocking block are arranged, the front surface of the novel anti-blocking block is provided with transverse long circular transverse bolt holes, the corrugated beam plate is arranged on the front surface of the novel anti-blocking block through bolt matching connection, the back surface of the novel anti-blocking block is provided with vertical bolt holes along the vertical direction of a guardrail, the back surface of the novel anti-blocking block is provided with a bolt connecting piece, the back surface of the novel anti-blocking block is connected with the stand columns through bolt anchoring, the cross beams are arranged above or below or above and below the corrugated beam plate simultaneously, energy-absorbing components are filled in the frame of the novel anti-blocking block, and the tops of the stand columns are provided with column caps;
divide into two kinds of operating modes, operating mode one when wave form beam slab top sets up the crossbeam: the upright posts are high, and the cross beams are connected at the tops of the upright posts through compression blocks; working conditions are as follows: the upright posts are lifted at the top surface by sleeves, and the cross beam is anchored and connected with the sleeves by compression blocks;
when the cross beam is arranged below the corrugated beam plate, the cross beam is connected and anchored at a fixed position on the upright post through a compression block or directly;
further, the energy-absorbing member material is alloy or macromolecular material, the energy-absorbing member is inside for filling the cavity frame that novel hinders the piece, perhaps the energy-absorbing member is for setting up the plate-shape that the piece was laminated mutually above, below, preceding, the back arbitrary face of novel hindering of preventing, the energy-absorbing member is connected through welding or gluing agent anchor with novel preventing hindering the piece, the preceding horizontal bolt hole that sets up the matching of energy-absorbing member, the energy-absorbing member back sets up the vertical bolt hole of matching.
Furthermore, the cross section of the upright post is a rectangular or round or special-shaped steel pipe, the cross section of the post cap is matched with that of the upright post, and the post cap is made of rubber or carbon steel.
Furthermore, the cross section of the beam, the sleeve and the compression block is in the shape of one or a combination of a rectangular pipe, a round pipe, a D-shaped pipe, a channel steel and a special pipe.
Furthermore, the relative position relationship between the impact surface of the cross beam and the impact surface of the corrugated beam plate is convex or flush.
Furthermore, bolted connection spare is staple bolt or parallel steel sheet, and staple bolt welding or cover are in on the novel block of preventing, parallel steel sheet is two, welds respectively on the novel block of preventing.
Further, set up a plurality of on the stand and reserve the bolt hole, reserve the bolt hole and vertically set up on stand and novel upper portion of preventing blockking up bolted connection position respectively.
Furthermore, the upright post is connected with the pavement in an anchoring manner through a piling manner, a concrete pouring manner or a flange manner.
After the technical scheme is adopted, the utility model discloses following beneficial effect has:
(1) safety: the height is an important factor influencing the protection capability of the guardrail, and the guardrail structure adopting the novel anti-blocking block can ensure the height of the guardrail plate when being impacted, and even improve the height H of the guardrail plate, so that the guardrail plate has better safety protection capability;
(2) construction convenience: the corrugated plate, the novel anti-blocking block, the upright post and the cross beam are simply assembled, and meanwhile, the novel anti-blocking block is longitudinally provided with a long circular hole for adjustment and installation;
(3) the economic efficiency is as follows: the material consumption is reduced, the construction steps are saved, and the construction cost is reduced;
(4) pre-curing function: the bolt hole of reserving on the high accessible stand of guardrail and novel block cooperation of preventing adjust from top to bottom.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of embodiment 1 of the present invention;
fig. 2 is a schematic front view of embodiment 1 of the present invention;
fig. 3 is a perspective view of the novel anti-blocking block of embodiment 1 of the present invention;
fig. 4 is a schematic cross-sectional view of embodiment 2 of the present invention;
FIG. 5 is a schematic view of the energy-absorbing member filled inside the novel anti-blocking block of the present invention;
fig. 6 is a schematic cross-sectional view of embodiment 3 of the present invention;
figure 7 is a schematic cross-sectional plan view of a corrugated plate according to embodiment 3 of the present invention;
fig. 8 is a schematic cross-sectional view of embodiment 4 of the present invention;
figure 9 is a schematic cross-sectional plan view of a corrugated plate according to embodiment 4 of the present invention;
fig. 10 is a schematic view of a three-dimensional section of a novel anti-blocking block and a hoop welded according to embodiment 4 of the present invention;
fig. 11 is a schematic cross-sectional view of embodiment 5 of the present invention;
fig. 12 is a schematic view of the reserved bolt hole of the upright post of the present invention;
fig. 13 is a schematic view of the novel resistance block of the present invention, which is deformed and lifted by force.
The figures are labeled as follows:
1. a novel anti-blocking block; 2. a corrugated beam plate; 3. a column; 4. a cross beam; 5. a stiffening rib; 6. a transverse oblong hole; 7. a vertical oblong hole; 8. an energy absorbing member; 9. compressing the block; 10. a sleeve; 11. a cap; 12. an impact surface; 13. a collision-facing surface; 14. reserving bolt holes; 15. hooping; 16. parallel steel plates; 17. a road surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1-2, it is a schematic view of an embodiment 1 of a multi-layer guardrail structure applying the novel anti-blocking block of the present invention. Comprises a novel anti-blocking block 1, a corrugated beam plate 2, a stand column 3, a cross beam 4 and a bolt. As shown in FIG. 3, the novel anti-blocking block 1 is a steel plate bent parallelogram frame structure, the four sides of the upper surface, the lower surface, the front surface and the back surface of the novel anti-blocking block 1 are all welded with stiffening ribs 5, the front of the novel anti-blocking block 1 is provided with a transverse long round bolt hole 6, the corrugated beam plate 2 is connected and arranged on the front of the novel anti-blocking block 1 in a matching way through bolts, the back surface of the novel anti-blocking block 1 is provided with a vertical bolt hole 7 along the vertical direction of the guardrail, the back surface of the novel anti-blocking block 1 is directly connected with the upright post 3 through bolt jointing and anchoring, four reserved bolt holes 14 are arranged on the upright post 3, the upright post 3 is connected with a pavement 17 in an anchoring way by piling, the wave beam plate 2 below sets up crossbeam 4, crossbeam 4 passes through the fixed position of compression piece 9 connection anchor on stand 3, the top of stand 3 sets up cap 11.
The cross section of the upright post 3 is rectangular, the cross section of the post cap 11 is matched with that of the upright post 3, the post cap 11 is made of rubber, and the cross sections of the cross beam 4 and the compression block 9 are rectangular tubes.
The impact surface 13 of the corrugated beam plate 2 protrudes out of the impact surface 12 of the cross beam 4.
As shown in fig. 4, it is a schematic view of an embodiment 2 of a multi-layer guardrail structure applying the novel anti-blocking block of the present invention. Comprises a novel anti-blocking block 1, a corrugated beam plate 2, a stand column 3, a cross beam 4 and a bolt. As shown in figure 5, the novel anti-blocking block 1 is a steel plate bending parallelogram frame structure, stiffening ribs 5 are welded on the upper side, the lower side, the front side and the back side of the novel anti-blocking block 1, energy-absorbing members 8 are filled in the frame of the novel anti-blocking block 1, transverse long circular transverse bolt holes 6 are arranged on the front side of the novel anti-blocking block 1, the corrugated beam plate 2 is arranged on the front side of the novel anti-blocking block 1 through bolt matching connection, vertical bolt holes 7 along the vertical direction of a guardrail are arranged on the back side of the novel anti-blocking block 1, the back side of the novel anti-blocking block 1 is directly connected with a stand column 3 through bolt bonding anchoring, four reserved bolt holes 14 are arranged on the stand column 3, the reserved bolt holes 14 are respectively vertically arranged on the upper part of the bolt connecting position of the stand column 3 and the novel anti-blocking block 1, the stand column 3 is connected with a road surface 17 through a concrete pouring mode, the lower part of the corrugated beam plate 2 is provided with a cross beam 4, the cross beam 4 is directly connected and anchored with a fixed position on the upright post 3 through a bolt, and the top of the upright post 3 is provided with a post cap 11.
The energy-absorbing member 8 material is foamed aluminum or rubber or alloy or macromolecular material, 4 platelike that the energy-absorbing member 8 was laminated for setting up on the novel block 1 of preventing, below, preceding, the back four sides, energy-absorbing member 8 passes through the gluing agent anchor with the novel block 1 four sides of preventing and is connected, energy-absorbing member 8 is preceding to be set up with the novel horizontal bolt hole 6 that prevents block 1 and match, the energy-absorbing member 8 back sets up the vertical bolt hole 7 that matches with the novel block 1 that prevents.
The cross section of the upright post 3 is rectangular, the cross section of the post cap 11 is matched with that of the upright post 3, the post cap 11 is made of rubber, and the cross sections of the cross beam 4 and the compression block 9 are rectangular tubes.
The impact surface 13 of the corrugated beam plate 2 protrudes out of the impact surface 12 of the cross beam 4.
As shown in fig. 6-7, it is a schematic view of an embodiment 3 of the multi-layer guardrail structure applying the novel anti-blocking block of the present invention. Comprises a novel anti-blocking block 1, a corrugated beam plate 2, a stand column 3, a cross beam 4 and a bolt. The novel anti-blocking block 1 is of a steel plate bending parallelogram flat plate frame structure, a transverse long circular transverse bolt hole 6 is arranged in front of the novel anti-blocking block 1, the corrugated beam plate 2 is arranged on the front of the novel anti-blocking block 1 through bolt matching connection, a vertical bolt hole 7 along the vertical direction of a guardrail is arranged on the back of the novel anti-blocking block 1, two parallel steel plates 16 are arranged on the back of the novel anti-blocking block 1 and are respectively welded on two sides of the back of the novel anti-blocking block 1, the back of the novel anti-blocking block 1 is attached to a stand column 3, the parallel steel plates 16 on two sides of the back of the novel anti-blocking block 1 are connected through bolt anchoring on the side surface of the stand column 3, two reserved bolt holes 14 are arranged on the stand column 3, the reserved bolt holes 14 are vertically arranged on the upper part of the bolt connecting position of the stand column 3 and the novel anti-blocking block 1, the stand column 3 is connected with a road surface 17 through a flange mode, the corrugated beam slab is characterized in that a cross beam 4 is arranged above the corrugated beam slab 2, the height of the upright column 3 is increased on the top surface through a sleeve 10, the sleeve 10 is positioned and anchored through a bolt penetrating through the side surface, the cross beam 4 is anchored and connected with the sleeve 10 through a compression block 9, and a column cap 11 is arranged on the top of the sleeve 10.
The cross sections of the upright posts 3 and the sleeve 10 are circular, the cross section of the post cap 11 is matched with that of the upright posts 3, the post cap 11 is made of carbon steel, the cross section of the cross beam 4 is a D-shaped pipe, and the cross section of the compression block 9 is a rectangular pipe.
The impact surface 13 of the corrugated beam plate 2 protrudes out of the impact surface 12 of the cross beam 4.
As shown in fig. 8-9, it is a schematic view of an embodiment 4 of a multi-layer guardrail structure applying the novel anti-blocking block of the present invention. Comprises a novel anti-blocking block 1, a corrugated beam plate 2, a stand column 3, a cross beam 4 and a bolt. As shown in FIG. 10, the novel anti-blocking block 1 is a steel plate bending parallelogram frame structure, stiffening ribs 5 are welded on the upper side, the lower side, the front side and the back side of the novel anti-blocking block 1, transverse long circular transverse bolt holes 6 are arranged on the front side of the novel anti-blocking block 1, the corrugated beam plate 2 is arranged on the front side of the novel anti-blocking block 1 through bolt matching connection, vertical bolt holes 7 along the vertical direction of the guardrail are arranged on the back side of the novel anti-blocking block 1, hoops 15 on the back side of the novel anti-blocking block 1 are welded on the back side of the novel anti-blocking block 1, the hoops 15 on the back side of the novel anti-blocking block 1 are attached to the upright posts 3, the novel anti-blocking block 1 and the upright posts 3 are pre-tightened and anchored and positioned through the hoops 15, the upright posts 3 are anchored and connected with the road surface 17 through a pile driving mode, a crossbeam 4 is arranged above the corrugated beam plate 2, the upright posts 3 have enough height, the cross beam 4 is connected with the top of the upright post 3 through a compression block 9, and the post cap 11 is arranged on the top of the sleeve 10.
The cross-sectional shape of the upright post 3 is rectangular, the cross-sectional shape of the post cap 11 is matched with the cross-sectional shape of the upright post 3, the post cap 11 is made of rubber, the cross-sectional shape of the cross beam 4 is a circular tube, and the cross-sectional shape of the compression block 9 is a combination of a rectangular tube and the circular tube.
The impact surface 13 of the corrugated beam plate 2 is flush with the impact surface 12 of the cross beam 4.
As shown in fig. 11, it is a schematic view of an embodiment 5 of a multi-layer guardrail structure applying the novel anti-blocking block of the present invention. Comprises a novel anti-blocking block 1, a corrugated beam plate 2, a stand column 3, a cross beam 4 and a bolt. The novel anti-blocking block 1 is a steel plate bending parallelogram frame structure, stiffening ribs 5 are welded on the four sides of the upper surface, the lower surface, the front surface and the back surface of the novel anti-blocking block 1, transverse oblong transverse bolt holes 6 are arranged in the front surface of the novel anti-blocking block 1, the corrugated beam plate 2 is arranged on the front surface of the novel anti-blocking block 1 through bolt matching connection, vertical bolt holes 7 along the vertical direction of a guardrail are arranged on the back surface of the novel anti-blocking block 1, the back surface of the novel anti-blocking block 1 is directly connected with stand columns 3 through bolt attaching and anchoring, four reserved bolt holes 14 are arranged on the stand columns 3, the stand columns 3 are connected with a road surface 17 through piling, cross beams 4 are arranged above and below the corrugated beam plate 2, the stand columns 3 have enough height, the cross beams 4 are connected with fixed positions anchored on the stand columns 3 through compression blocks 9, and a column cap 11 is arranged at the top of the column 3.
The cross section of the upright post 3 is rectangular, the cross section of the post cap 11 is matched with that of the upright post 3, the post cap 11 is made of rubber, and the cross sections of the cross beam 4 and the compression block 9 are rectangular tubes.
The impact surface 13 of the corrugated beam plate 2 is flush with the impact surface 12 of the top cross beam 4, and the impact surface 13 of the corrugated beam plate 2 protrudes out of the impact surface 12 of the lower cross beam 4.
As shown in fig. 12, it is a schematic structural view of the multi-layer guardrail structure column using the novel anti-blocking block of the present invention. Two reserved bolt holes 14 are formed in the stand column 3, and the reserved bolt holes 14 are vertically formed in the upper portion of the position, where the stand column 3 is connected with the novel anti-blocking block 1 through bolts, of the connecting position.
As shown in fig. 13, for the utility model relates to a use novel multilayer guardrail structure of novel anti-blocking piece atress rising sketch map, only use embodiment 1 as an example to explain. After 2 atress F strikes of wave form beam slab, novel prevent that 1 atress compressive deformation of piece hinders, the while is novel prevent that piece 1 and the adjacent corner of wave form beam slab have the trend that the atress upwards warp, increase along with the continuation of strength, novel prevent that 1 atress of piece promotes high H, reach wave form beam slab 2 and receive the striking power not reduce the purpose of height, even promote the whole high H of guardrail, better safety protection ability has, behind 4 atress of bottom crossbeam, compression piece 9 is compressed, crossbeam 4 is to 3 direction bending deformation of stand.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an use multilayer guardrail structure of novel anti-block piece, includes novel anti-block piece (1), wave form beam slab (2), stand (3), crossbeam (4), bolt, its characterized in that: the novel obstruction block (1) is of a quadrilateral frame structure, the side edges of the upper surface, the lower surface, the front surface and the back surface of the novel obstruction block (1) or welding stiffening ribs (5), the front of the novel anti-blocking block (1) is provided with a transverse long round transverse bolt hole (6), the corrugated beam plate (2) is connected and arranged on the front surface of the novel anti-blocking block (1) in a matching way through bolts, the back of the novel anti-blocking block (1) is provided with a vertical bolt hole (7) along the vertical direction of the guardrail, the back surface of the novel block (1) is provided with a bolt connecting piece or is provided with a bolt connecting piece, the back surface of the novel block (1) is connected with the upright post (3) through bolt anchoring, the upper part or the lower part or the upper part and the lower part of the corrugated beam plate (2) are simultaneously provided with a cross beam (4), the novel anti-blocking block (1) is internally provided with a frame or is filled with an energy-absorbing member (8), and the top of the upright post (3) is provided with a post cap (11);
wave form beam slab (2) top sets up crossbeam (4) time division and is two kinds of operating modes, and operating mode one: the upright posts (3) have height, and the cross beams (4) are connected at the tops of the upright posts (3) through compression blocks (9); working conditions are as follows: the height of the upright post (3) is increased on the top surface through a sleeve (10), and the cross beam (4) is in anchoring connection with the sleeve (10) through a compression block (9);
when the cross beam (4) is arranged below the corrugated beam plate (2), the cross beam (4) is connected and anchored at a fixed position on the upright post (3) through the compression block (9) or directly.
2. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: energy-absorbing member (8) material is alloy or macromolecular material, inside energy-absorbing member (8) for filling the cavity frame that novel hinders piece (1) of preventing, or energy-absorbing member (8) is for setting up the plate-type that the piece (1) was higher than, below, preceding, the back arbitrary face was laminated mutually, energy-absorbing member (8) and novel block (1) of preventing are connected through welding or gluing agent anchor, energy-absorbing member (8) are preceding to be set up horizontal bolt hole (6) of matching, energy-absorbing member (8) back sets up vertical bolt hole (7) of matching.
3. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: the cross section of the upright post (3) is a rectangular or round or special-shaped steel pipe, the cross section of the cap (11) is matched with the cross section of the upright post (3), and the cap (11) is made of rubber or carbon steel.
4. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: the cross section of the beam (4), the sleeve (10) and the compression block (9) is in one or a combination of a rectangular pipe, a round pipe, a D-shaped pipe, a channel steel and a special pipe.
5. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: the impact surface (12) of the cross beam (4) and the impact surface (13) of the corrugated beam plate (2) are arranged in a protruding or flush manner.
6. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: the bolt connecting piece is hoop (15) or parallel steel plate (16), and hoop (15) welding or cover are in on novel hinder piece (1), parallel steel plate (16) are two, weld respectively on novel hinder piece (1).
7. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: the novel anti-blocking device is characterized in that a plurality of reserved bolt holes (14) are formed in the stand column (3), and the reserved bolt holes (14) are vertically formed in the upper portion of the position, connected with the novel anti-blocking block (1) through bolts, of the stand column (3).
8. The multilayer guardrail structure applying the novel block prevention block as claimed in claim 1, wherein: the upright post (3) is connected with the pavement (17) in an anchoring way through a piling way, a concrete pouring way or a flange way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021625427.8U CN213805082U (en) | 2020-08-07 | 2020-08-07 | Use multilayer guardrail structure of novel anti-blocking piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021625427.8U CN213805082U (en) | 2020-08-07 | 2020-08-07 | Use multilayer guardrail structure of novel anti-blocking piece |
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| CN213805082U true CN213805082U (en) | 2021-07-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305856A (en) * | 2022-08-23 | 2022-11-08 | 上海市政工程设计研究总院（集团）有限公司 | Special waveform guardrail for extra-large ultrahigh road |
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2020
- 2020-08-07 CN CN202021625427.8U patent/CN213805082U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305856A (en) * | 2022-08-23 | 2022-11-08 | 上海市政工程设计研究总院（集团）有限公司 | Special waveform guardrail for extra-large ultrahigh road |
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