Low-deformation protective guardrail

Abstract

The utility model relates to the technical field of roads, and discloses a low-deformation protective guardrail which mainly structurally comprises a guardrail body, and the guardrail body comprises a plurality of stand columns arranged at intervals and protective plates installed on the stand columns; the layered cross beam structure is connected to the top of the fence body; the layered beam structure comprises a plurality of cross beams, the cross beams are arranged at intervals, the lengths of the cross beams are gradually increased from top to bottom, and the cross beams are connected to the stand columns; the two ends of the cross beam on the top layer are provided with upper end heads, and the other ends of the upper end heads extend to be connected to the outer wall of the cross beam on the bottom layer. Lower end heads are arranged at the two ends of the cross beam on the bottom layer, and the other ends of the lower end heads extend to be connected to the protection plates. And through the layered cross beam structural design, the protection capability of the guardrail to impact at different heights is improved, and the stability and strength of the whole structure are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of road technology, specifically to a low-deformation protective guardrail. Background Technology

[0002] In highway traffic, especially in areas with expressways, bridges, and complex structures, the safety performance requirements for guardrails are extremely high. Traditional guardrails have many shortcomings in terms of impact resistance and structural strength. For example, most traditional guardrails have an impact resistance rating of SB, which is insufficient to withstand the strong impact of high-speed vehicles; the lateral displacement after a collision is large, which can easily cause secondary injuries to vehicles and people, and may also damage structures (concrete pillars or other marker posts, etc.) on both sides of the road or the median strip. Therefore, developing a new type of low-deformation protective guardrail is of significant practical importance. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a low deformation protective railing, which aims to alleviate the above problems to at least a certain extent.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A low-deformation protective railing, comprising:

[0006] The fence includes a plurality of spaced-apart posts and a protective plate installed on the posts;

[0007] A layered beam structure is connected to the top of the railing;

[0008] The layered beam structure includes multiple horizontal beams, which are arranged at intervals and whose lengths increase from top to bottom. The horizontal beams are connected to the columns.

[0009] The top beam has upper ends at both ends, and the other end of the upper ends extends to the outer wall of the bottom beam.

[0010] The bottom beam has lower ends at both ends, and the other end of the lower ends extends to connect to the guard plate.

[0011] In a low-deformation protective railing provided in this application, the crossbeam includes multiple rectangular tubes connected end to end, and the joints of two adjacent rectangular tubes are connected by tube supports, which are connected to the uprights.

[0012] In a low-deformation protective railing provided in this application, a connecting pipe is provided inside the connection point of two adjacent rectangular tubes, and the connecting pipe connects the two adjacent rectangular tubes together.

[0013] In a low-deformation protective railing provided in this application, the railing is provided on both sides, and diagonal bracing is provided between the two sides of the railing, the diagonal bracing being connected to the railing.

[0014] In the low deformation protective railing provided in this application, the surface of the railing is hot-dip galvanized.

[0015] In the low deformation protective railing provided in this application, the surface of the railing is hot-dip galvanized, and a powder coating layer is also provided outside the galvanized layer.

[0016] In a low-deformation protective railing provided in this application, a breakable bolt is provided at the connection between the crossbeam and the column, and the preload of the breakable bolt is configured to allow for lateral displacement after a collision.

[0017] In a low-deformation protective guardrail provided in this application, an arc-shaped guide plate is provided in the transition section of the guardrail.

[0018] In summary, the spaced-apart posts provide support for the entire guardrail, while the guardrail panels block and cushion vehicle impacts. In the layered beam structure, multiple beams are arranged at intervals, with their lengths increasing from top to bottom. This design allows beams of different heights to cope with impacts from vehicles at different heights. The top beam can withstand impacts from higher positions, while the longer bottom beams provide stronger support and protection at lower positions. The upper and lower ends connect the top and bottom beams, and the bottom beam to the guardrail panels, respectively, forming a stable whole and enhancing the guardrail's integrity and force transmission capacity. This invention mainly has the following beneficial effects: through the layered beam structure design, it improves the guardrail's ability to protect against impacts at different heights, enhances the stability and strength of the overall structure, more effectively blocks and cushions vehicle impacts, reduces displacement and damage after a collision, and ensures road safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the side structure of the guardrail of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the guardrail of this utility model;

[0021] Figure 3 This is a top view schematic diagram of the guardrail structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the connecting pipe structure of this utility model.

[0023] Figure label:

[0024] 10. Railing; 11. Posts; 12. Guardrails;

[0025] 20. Crossbeam; 21. Top end; 22. Bottom end; 23. Rectangular tube; 24. Tube support; 25. Connecting tube; 30. Diagonal brace. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] refer to Figures 1-4 A low-deformation protective railing includes: a railing body 10, which includes a plurality of spaced-apart posts 11 and guardrails 12 mounted on the posts 11; a layered beam structure 20 connected to the top of the railing body 10; the layered beam structure includes a plurality of beams 20, which are spaced-apart and their lengths increase from top to bottom, and the beams 20 are connected to the posts 11; the top beam 20 has upper ends 21 at both ends, and the other end of the upper ends 21 extends to the outer wall of the bottom beam 20; the bottom beam 20 has lower ends 22 at both ends, and the other end of the lower ends 22 extends to the guardrails 12.

[0028] The spaced-apart posts 11 provide support for the entire guardrail, while the guardrail panels 12 are used to block and buffer vehicle impact forces. In the layered beam structure 20, multiple beams 20 are arranged at intervals, with their lengths increasing from top to bottom. This design allows beams 20 of different heights to cope with impacts from vehicles at different heights. The top beam 20 can withstand impacts from higher positions, while the longer bottom beams 20 provide stronger support and blocking at lower positions. The upper end 21 and lower end 22 connect the top and bottom beams 20, and the bottom beam 20 and guardrail panels 12, respectively, forming a stable whole and enhancing the guardrail's integrity and force transmission capacity. Through the layered beam 20 and end structure design, the guardrail's ability to protect against impacts at different heights is improved, enhancing the overall structural stability and strength. It can more effectively block and buffer vehicle impacts, reduce displacement and damage after a collision, and ensure road safety.

[0029] In this embodiment, the length of a single guardrail module is 18m, and the impact resistance level is SA. The guardrail is suitable for the protection of roadside structures and median strip facilities.

[0030] The crossbeam 20 includes multiple rectangular tubes 23, which are connected end to end. The joints of two adjacent rectangular tubes 23 are connected by tube supports 24, which are connected to the column 11.

[0031] The crossbeam 20 is composed of multiple rectangular tubes 23 connected end to end, and adjacent rectangular tubes 23 are connected by tube supports 24 and fixed to the column 11. The tube supports 24 serve to connect and support, so that the crossbeam 20 composed of multiple rectangular tubes 23 can be stably installed on the column 11, and ensure that when the crossbeam 20 is subjected to external force, the force can be evenly transmitted to the column 11.

[0032] This connection method facilitates the assembly and installation of the crossbeam 20, while enhancing the structural stability of the crossbeam 20, making it less prone to breakage or deformation when subjected to impact, and improving the overall protective performance of the guardrail.

[0033] In this embodiment, the upper crossbeam 20 rectangular tube 23 has dimensions of 80×80×4.5, the middle crossbeam 20 rectangular tube 23 has dimensions of 80×100×4.5, and the lower crossbeam 20 rectangular tube 23 has dimensions of 80×120×4.5.

[0034] In some embodiments, a connecting pipe 25 is further provided inside the connection point of two adjacent rectangular tubes 23, and the connecting pipe 25 connects the two adjacent rectangular tubes 23 together. The connecting pipe 25 inside the connection point of adjacent rectangular tubes 23 tightly connects the two adjacent rectangular tubes 23, further enhancing the integrity and rigidity of the crossbeam 20, allowing the force to be transmitted more smoothly between the adjacent rectangular tubes 23 when the crossbeam 20 is subjected to impact. This improves the deformation resistance and load-bearing capacity of the crossbeam 20, ensuring that the crossbeam 20 can better perform its blocking and buffering function in the event of a vehicle collision, reducing the possibility of damage to the crossbeam 20, and extending the service life of the guardrail.

[0035] In some embodiments, the guardrail is provided on both sides, and a diagonal brace 30 is provided between the two sides of the guardrail, the diagonal brace 30 being connected to the guardrail.

[0036] When guardrails are installed on both sides, the diagonal brace 30 in the middle connects the two sides. The diagonal brace 30 forms a triangular structure between the two sides of the guardrails. Utilizing the stability principle of a triangle, this enhances the overall stability of the guardrails on both sides, allowing them to better maintain structural integrity when subjected to impact forces from different directions. This improves the impact resistance and stability of the guardrails on both sides, making them particularly suitable for scenarios requiring double-sided protection, such as median strips. It effectively prevents vehicles from breaking through the guardrails and entering the opposite lane, ensuring the safety of vehicles traveling in both directions. When the width of the median strip on both sides of the guardrails is different, the diagonal brace 30 is designed according to the actual width on site. The guardrails on both sides of the bridge use diagonal braces 30, while other outer guardrails use single diagonal braces 30 according to the direction of traffic.

[0037] In some embodiments, the surface of the guardrail is treated with hot-dip galvanizing. Hot-dip galvanizing forms a zinc layer on the guardrail surface, which provides excellent electrochemical protection. When the zinc layer comes into contact with air or moisture, the zinc is preferentially oxidized, thus protecting the internal metal components from corrosion. This improves the guardrail's corrosion resistance, extends its service life, reduces damage and maintenance costs caused by corrosion, and enables it to adapt to various harsh natural environments.

[0038] The surface of the guardrail is treated with hot-dip galvanizing, and a powder coating layer is applied over the galvanized layer. This dual anti-corrosion process greatly improves the guardrail's corrosion resistance. Compared to single hot-dip galvanizing, it better protects the guardrail, extending its service life in harsh environments. The powder coating also serves a decorative purpose, making the guardrail more aesthetically pleasing.

[0039] In some embodiments, a breakable bolt is provided at the connection between the crossbeam 20 and the column 11. The preload of the breakable bolt is configured such that the lateral displacement after a collision is ≤0.5m. By providing a breakable bolt at the connection between the crossbeam 20 and the column 11, when the guardrail is struck by a vehicle, if the impact force exceeds the bearing capacity of the breakable bolt, the bolt will break. Simultaneously, the preload is set to control the lateral displacement of the guardrail after breakage to ≤0.5m. This not only absorbs impact energy to a certain extent but also limits the displacement range of the guardrail, preventing secondary damage to the surrounding environment and vehicles. Effectively controlling the lateral displacement after a collision reduces the impact of accidents on surrounding facilities and vehicles, ensures normal road traffic, and improves the safety performance of the guardrail.

[0040] The guardrail transition section is equipped with an arc-shaped guide plate, the radius of curvature of which and the installation angle meet the requirement that the guide deviation angle is ≤5°. The arc-shaped guide plate in the guardrail transition section, with its specific radius of curvature and installation angle (guide deviation angle ≤5°), can guide the vehicle to travel along a certain trajectory when the vehicle collides with the guardrail transition section, avoiding the vehicle from suddenly changing direction due to the collision and causing injury to the occupants.

[0041] It improves safety during vehicle collisions, reduces the risk of loss of vehicle control, and decreases the severity of damage to vehicles and people in accidents.

[0042] When encountering bridges, culverts, or other structures, the driven-in posts 11 can be adjusted to flange posts 11 and installed in conjunction with a concrete foundation. When there are multiple consecutive obstacles such as piers, add one post 11 for every 50cm or more in width to enhance protection. When the pier diameter is too large or the pier design is vase-shaped, the spacing of the guardrail posts 11 on both sides of the pier needs to be adjusted according to the actual situation.

[0043] The column 11 is made of 130×130×6 rectangular steel pipe, and the material is Q235 high-strength steel. The guard plate 12 is made of 506×85×4 triple corrugated guard plate 12, which disperses the impact force through its corrugated structure and improves the local deformation resistance.

[0044] Compared with traditional guardrails, this guardrail has the following advantages:

[0045] It has a higher level of crash protection; traditional guardrails are SB level, while this guardrail reaches SA level (level 5).

[0046] The lateral displacement after a collision is smaller; the lateral displacement of traditional guardrails is ≥1.2m, while that of this guardrail is ≤0.5m.

[0047] The module replacement time is shorter. Traditional guardrails require complete removal, while this guardrail can be replaced in ≤30 minutes per module.

[0048] It has a longer corrosion resistance lifespan; traditional guardrails have a corrosion resistance lifespan of 15 years, while this guardrail has a lifespan of ≥25 years.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low deflection amount protective barrier, characterized by, include: The fence includes a plurality of spaced-apart posts and a protective plate installed on the posts; A layered beam structure is connected to the top of the railing; The layered beam structure includes multiple beams, which are arranged at intervals and whose lengths increase from top to bottom. The beams are connected to the columns. The top beam has upper ends at both ends, and the other end of the upper ends extends to the outer wall of the bottom beam. The bottom beam has lower ends at both ends, and the other end of the lower ends extends and connects to the guard plate. The crossbeam comprises multiple rectangular tubes connected end to end, with adjacent rectangular tubes connected by a tube support, which is attached to the column.

2. A low deflection amount protective barrier according to claim 1, wherein The junction of two adjacent rectangular tubes is also equipped with a connecting pipe, which is connected to the two adjacent rectangular tubes respectively.

3. A low deflection amount protective barrier according to claim 1, wherein The guardrail is installed on both sides, and diagonal braces are installed between the two sides of the guardrail, and the diagonal braces are connected to the guardrail.

4. The low-deformation protective railing according to claim 1, characterized in that, The surface of the guardrail is hot-dip galvanized.

5. A low deflection amount protective barrier according to claim 4, wherein The guardrail has a powder-coated layer on top of its galvanized layer.

6. A low deflection amount protective barrier according to claim 1, wherein A breakable bolt is provided at the connection between the crossbeam and the column, and the preload of the breakable bolt is configured to allow for lateral displacement after a collision.

7. A low deflection amount protective barrier according to claim 1, wherein Curved guide plates are installed at the transition section of the guardrail.

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