Low wind resistance metal beam column type highway guardrail

Abstract

This application discloses a low-wind-resistance metal beam-column highway guardrail. The design includes posts, crossbeams, and connectors. The lower part of the post is pre-embedded in the roadbed. At least two crossbeams are connected to the post from top to bottom via connectors. The posts and crossbeams have circular cross-sections. The diameter and wall thickness of the posts and / or crossbeams meet certain conditions. The low-wind-resistance metal beam-column highway guardrail in this application, with its circular cross-section design for the posts and crossbeams, reduces the deposition of sand, snow, and other particles on the highway surface. This not only improves the guardrail's snow and sand blocking function under adverse geological conditions such as windblown snow or aeolian sand, but also enhances highway traffic safety.

Description

Technical Field

[0001] This application relates to the field of guardrail technology, and in particular to a low wind resistance metal beam-column highway guardrail. Background Technology

[0002] Currently, in wind-blown sand and snow sections of roads, guardrails can obstruct the wind, leading to sand and snow accumulation on the road surface. Conventional guardrail types cannot meet the comprehensive functional requirements of preventing snow and sand accumulation as well as protecting vehicles in these sections.

[0003] Therefore, how to improve the ability of low-wind-resistance metal beam-column highway guardrails to prevent snow and sand accumulation has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] This application proposes a low-wind-resistance metal beam-column highway guardrail to improve its ability to prevent snow and sand accumulation.

[0005] To achieve the above objectives, this application discloses the following technical solutions:

[0006] This application provides a low-wind-resistance metal beam-post highway guardrail, comprising posts, beams, and connectors, wherein...

[0007] The lower part of the column is configured to be embedded in the roadbed;

[0008] At least two crossbeams are connected to the column from top to bottom via connectors; the cross-sections of the column and the crossbeams are circular.

[0009] Under the first protection level, the diameter and wall thickness of the columns and / or beams meet the following conditions:

[0010]

[0011]

[0012]

[0013] In the case of the second protection level, the diameter and wall thickness of the columns and / or beams meet the following conditions:

[0014]

[0015]

[0016]

[0017] In the case of the third protection level, the diameter and wall thickness of the columns and / or beams meet the following conditions:

[0018]

[0019]

[0020]

[0021] In some embodiments, the connector includes a first connecting portion and a second connecting portion, the first connecting portion being connected to the crossbeam and the second connecting portion being connected to the column.

[0022] In some embodiments, the first connecting portion and the second connecting portion are connected by welding and / or fasteners;

[0023] The first connecting part is connected to the crossbeam by welding and / or fasteners;

[0024] The second connecting part is connected to the column by welding and / or fasteners.

[0025] In some embodiments, the first connecting portion and / or the second connecting portion is a solid structure or a hollow structure.

[0026] In some embodiments, when the first connecting portion and / or the second connecting portion is a hollow structure, reinforcing ribs are provided inside the first connecting portion and / or the second connecting portion.

[0027] In some embodiments, the connection between the uppermost crossbeam and the column is along the height direction;

[0028] The first connecting portion is flush with the second connecting portion; and / or

[0029] The first connecting part is offset upward relative to the second connecting part.

[0030] In some embodiments, the first connecting portion includes a first connecting arm and a second connecting arm arranged opposite to each other, the first connecting arm having a first contact surface that fits against the crossbeam, and the second connecting arm having a second contact surface that fits against the crossbeam.

[0031] In some embodiments, the second connection includes a mounting wall and a fastening hole, the mounting wall being fitted to the circumferential surface of the column, and the fastening hole being connected to the column by a fastener.

[0032] In some embodiments, each column has two crossbeams arranged along its height.

[0033] Each column has three crossbeams arranged along its height.

[0034] In some embodiments, the outer surfaces of the columns, beams, and connectors are coated with an anti-rust coating and / or an abrasion-resistant coating.

[0035] As can be seen from the above technical solutions, the low wind resistance metal beam-column highway guardrail in this application embodiment has a circular cross-section design for the columns and beams, which can reduce the deposition of sand and snow particles on the highway surface. This not only improves the guardrail's snow and sand blocking function under adverse geological conditions such as windblown snow or wind-blown sand, but also helps to improve highway traffic safety. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings, all of which fall within the scope of protection of this utility model. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structure or operation.

[0037] Figure 1 A schematic diagram of a low wind resistance metal beam-column highway guardrail provided for an embodiment of this application;

[0038] Figure 2 A schematic diagram of another low-wind-resistance metal beam-column highway guardrail provided in an embodiment of this application;

[0039] Figure 3 A schematic diagram of a third type of low wind resistance metal beam-column highway guardrail provided in the embodiments of this application;

[0040] Figure 4 A perspective view of a connector provided in an embodiment of this application;

[0041] Figure 5 for Figure 4 The front view of the connector shown;

[0042] Figure 6 for Figure 4 The front view of the first connecting part of the connector shown after it has been offset upwards;

[0043] Figure 7 A perspective view of another connector provided in an embodiment of this application;

[0044] Figure 8 for Figure 7 The front view of the connector shown;

[0045] Figure 9 for Figure 7 The front view of the first connecting part of the connector shown after it has been offset upwards;

[0046] Figure 10 and Figure 11 A perspective view of the third type of connector provided in the embodiments of this application;

[0047] Figure 12 for Figure 10 The front view of the connector shown;

[0048] Figure 13 and Figure 14 A perspective view of the fourth type of connector provided in the embodiments of this application;

[0049] Figure 15 for Figure 13 The front view of the connector shown;

[0050] Figures 16 to 24 The wind resistance simulation diagram of the three protection levels of low wind resistance metal beam-column highway guardrail provided in the application embodiment;

[0051] Figures 25 to 39 The following is a structural simulation diagram of the three protection levels of low wind resistance metal beam-column highway guardrails after a collision, provided in the embodiments of the application.

[0052] In the diagram: 1-Column; 2-Beam; 3-Connector; 4-Roadbed;

[0053] 31-First connecting part; 311-First connecting arm; 311a-First mating surface; 312-Second connecting arm; 312a-Second mating surface;

[0054] 32-Second connecting part; 321-Mounting wall; 322-Fasting hole; 323-First side wall; 324-Second side wall; 3241-Horizontal section; 3242-Inclined section. Detailed Implementation

[0055] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0056] See Figures 1 to 3 This application discloses a low wind resistance metal beam-column type highway guardrail (hereinafter referred to as highway guardrail), which may include a column 1, a crossbeam 2 and a connector 3, wherein the lower part of the column 1 is configured to be pre-embedded in the roadbed 4; at least two crossbeams 2 are connected to the column 1 from top to bottom through the connector 3; the cross sections of the column 1 and the crossbeam 2 are circular structures.

[0057] Under the first protection level, the diameter and wall thickness of column 1 and / or beam 2 meet the following conditions:

[0058]

[0059]

[0060]

[0061] In the case of the second protection level, the diameter and wall thickness of column 1 and / or beam 2 meet the following conditions:

[0062]

[0063]

[0064] In the case of the third protection level, the diameter and wall thickness of column 1 and / or beam 2 meet the following conditions:

[0065]

[0066]

[0067] In this embodiment of the highway guardrail, the cross-section of the post 1 and the beam 2 is designed as a circular structure, which can reduce the deposition of particles such as sand and snow on the highway surface. This not only improves the guardrail's snow and sand blocking function under adverse geological conditions such as windblown snow or wind-blown sand, but also helps to improve the safety of highway traffic.

[0068] See Figures 16 to 24 ,in, Figures 16 to 18 for Figure 1 The diagram shown is a simulation of the wind resistance of a highway guardrail (corresponding to Class A). Figure 16 The diameters of the central column 1 and the crossbeam 2 are 80mm; Figure 17 The diameter of the central column 1 and the crossbeam 2 is 121mm; Figure 18 The diameter of the central column 1 and the crossbeam 2 is 250mm.

[0069] Figures 19 to 21 for Figure 2 The diagram shown is a simulation of the wind resistance of a highway guardrail (corresponding to SB level). Figure 19 The diameters of the central column 1 and the crossbeam 2 are 80mm; Figure 20 The diameter of the central column 1 and the crossbeam 2 is 121mm; Figure 21 The diameter of the central column 1 and the crossbeam 2 is 250mm.

[0070] Figures 22 to 24 for Figure 3 The diagram shown illustrates the wind resistance simulation of a highway guardrail (corresponding to SA level). Figure 22The diameters of the central column 1 and the crossbeam 2 are 80mm; Figure 23 The diameter of the central column 1 and the crossbeam 2 is 121mm; Figure 24 The diameter of the central column 1 and the crossbeam 2 is 250mm.

[0071] The simulation results show that the wind resistance is lower near the highway guardrail. Lower wind resistance means that the wind speed decreases less as it passes over the road surface, which reduces the deposition of sand, snow and other particulate matter on the road surface.

[0072] See Figures 25 to 39 ,in, Figures 25 to 29 for Figure 1 The diagram shown is a structural simulation of a highway guardrail. Figure 25 and Figure 26 The diameter of the central column 1 and the crossbeam 2 is 80mm, and the wall thickness is 3.85mm and 9.57mm respectively; Figure 27 The diameter of the central column 1 and the crossbeam 2 is 121mm, and the wall thickness is 3.5mm. Figure 28 and Figure 29 The diameter of the central column 1 and the crossbeam 2 is 250mm, and the wall thickness is 1.17mm and 2.68mm respectively.

[0073] Figures 30 to 34 for Figure 2 The diagram shown is a structural simulation of a highway guardrail. Figure 30 and Figure 31 The diameter of the central column 1 and the crossbeam 2 is 80mm, and the wall thickness is 6.75mm and 19.63mm, respectively; Figure 32 The diameter of the central column 1 and the crossbeam 2 is 121mm, and the wall thickness is 5mm. Figure 33 and Figure 34 The diameter of the central column 1 and the crossbeam 2 is 250mm, and the wall thickness is 2.0mm and 5mm respectively.

[0074] Figures 35 to 39 for Figure 3 The diagram shown is a structural simulation of a highway guardrail. Figure 35 and Figure 36 The diameter of the central column 1 and the crossbeam 2 is 80mm, and the wall thickness is 6.33mm and 30mm respectively; Figure 37 The diameter of the central column 1 and the crossbeam 2 is 121mm, and the wall thickness is 5mm. Figure 38 and Figure 39 The diameter of the central column 1 and the crossbeam 2 is 250mm, and the wall thickness is 2mm and 7.33mm respectively.

[0075] The simulation results above show that, Figures 1 to 3The highway guardrail shown remains intact after a collision with the maximum vehicle collision load that meets safety performance requirements, which fully demonstrates that the highway guardrail in the example above can meet safety requirements.

[0076] Each column 1 has two horizontal beams 2 arranged along its height, such as Figure 1 and Figure 2 As shown; each column 1 has three crossbeams 2 arranged along its height, such as Figure 3 As shown.

[0077] See Figure 4 and Figure 7 The connector 3 of this application is used to connect the crossbeam 2 and the column 1. The connector 3 includes a first connecting part 31 and a second connecting part 32. The first connecting part 31 is connected to the crossbeam 2, and the second connecting part 32 is connected to the column 1.

[0078] It should be noted that the first connecting part 31 and the second connecting part 32 are connected by welding and / or fasteners; this can be understood as: the first connecting part 31 and the second connecting part 32 are connected by welding, or the first connecting part 31 and the second connecting part 32 are connected by fasteners, or the first connecting part 31 and the second connecting part 32 are connected by welding and fasteners.

[0079] The first connecting part 31 is connected to the crossbeam 2 by welding and / or fasteners; this can be understood as: the first connecting part 31 and the crossbeam 2 are connected by welding, or the first connecting part 31 and the crossbeam 2 are connected by fasteners, or the first connecting part 31 and the crossbeam 2 are connected by welding and fasteners.

[0080] The second connecting part 32 is connected to the column 1 by welding and / or fasteners. This can be understood as: the column 1 and the second connecting part 32 are connected by welding, or the column 1 and the second connecting part 32 are connected by fasteners, or the column 1 and the second connecting part 32 are connected by both welding and fasteners.

[0081] The first connecting portion 31 and / or the second connecting portion 32 described above are either solid or hollow structures. Designing the first connecting portion 31 and / or the second connecting portion 32 as a hollow structure can improve the buffering capacity of the connector 3. Designing the first connecting portion 31 and / or the second connecting portion 32 as a solid structure can improve the strength of the connector 3.

[0082] Meanwhile, when the first connecting portion 31 and / or the second connecting portion 32 are hollow structures, reinforcing ribs are provided inside the first connecting portion 31 and / or the second connecting portion 32. By providing reinforcing ribs, the connection strength of the first connecting portion 31 and / or the second connecting portion 32 can be improved.

[0083] Along the vertical direction, in the connector 3 that connects the uppermost crossbeam 2 to the column 1; the first connecting part 31 and the second connecting part 32 are flush, as shown... Figure 5 and Figure 8 As shown; and / or the first connecting portion 31 is offset upward relative to the second connecting portion 32, as Figure 6 and Figure 9 As shown.

[0084] The first connecting portion 31 includes a first connecting arm 311 and a second connecting arm 312 arranged opposite to each other. The first connecting arm 311 has a first contact surface 311a that contacts the crossbeam 2, and the second connecting arm 312 has a second contact surface 312a that contacts the crossbeam 2. The first contact surface 311a and / or the second contact surface 312a are curved surfaces or flat surfaces. Figure 4 In the middle, the first mating surface 311a and the second mating surface 312a correspond to a portion of the axial cylindrical surface. Figure 7 In the middle, the first mating surface 311a and the second mating surface 312a correspond to a part of the circumferential cylindrical surface.

[0085] See Figure 4 and Figure 7 The second connecting part 32 includes a mounting wall 321 and a fastening hole 322. The mounting wall 321 fits against the circumferential surface of the column 1, and the fastening hole 322 is connected to the column 1 by a fastener.

[0086] In the structures described above, the structure of the first connecting part 31 corresponds to the connection of the crossbeam 2, and the structure of the second connecting part 32 corresponds to the connection of the column 1. In other examples of this application, the structure of the first connecting part 31 may also correspond to the connection of the column 1, and the structure of the second connecting part 32 may also correspond to the connection of the crossbeam 2.

[0087] join Figures 10 to 15 This application also discloses two other types of connectors 3, each connector 3 including a first connecting portion 31 and a second connecting portion 32. The second connecting portion 32 includes a first sidewall 323 and a second sidewall 324 arranged opposite to each other, and a mounting wall 321 connecting the first sidewall 323 and the second sidewall 324. The first connecting portion 31 connects the first sidewall 323 and the second sidewall 324. The first connecting portion has a cylindrical surface structure, and the mounting wall 31 wraps around the portion of the crossbeam 2 in the circumferential direction.

[0088] It should be noted that the first sidewall 323 and the second sidewall 324 can extend horizontally, such as... Figures 10 to 12 As shown; or in some examples, both the first sidewall 323 and the second sidewall 324 include a horizontal segment 3241 and an inclined segment 3242, wherein the horizontal segment 3241 extends horizontally, and the inclined segment 3242 is inclined relative to the horizontal segment 3241, such as... Figures 13 to 15 As shown.

[0089] Circular structures allow airflow to bypass the surface more smoothly, significantly reducing airflow separation behind objects and minimizing the deposition of snow and other particulate matter on roads. In contrast, square or angular cross-sections create large low-pressure vortices behind the windward side, causing a sudden drop in airflow velocity and leading to the deposition of snow or sand particles. Circular / elliptical designs weaken the settling conditions for particles by reducing the size and intensity of vortices; streamlined structures maintain higher airflow velocity upon contact with the structure, reducing sudden changes in local wind speed. Snow and sand deposition often occurs in areas where wind speeds are significantly reduced (such as the leeward side of an obstacle). Circular or elliptical designs maintain the inertial motion of particles through a smooth airflow transition, making them easier to be carried away by the airflow rather than deposited. The smooth surfaces of streamlined structures reduce friction between particles and the structure, making it easier for deposited snow or sand to slide off or be dispersed by subsequent wind forces. For example, snow is more likely to slide due to gravity or wind on sloping or curved surfaces than to form stable accumulations at sharp corners.

[0090] Specifically, when the cross-section is circular, it exhibits the same resistance characteristics to winds from all directions, avoiding the localized accumulation problems caused by wind direction changes in square structures. When the cross-section is elliptical, the major axis can be aligned with the prevailing wind direction, further optimizing the flow around the object and providing more efficient anti-accumulation performance in specific environments (such as areas with strong unidirectional sandstorms). A streamlined cross-section design reduces the static stability required for particulate matter deposition, thereby enhancing the guardrail's snow and sand blocking capabilities under adverse geological conditions such as blowing snow or aeolian sand. Therefore, the highway guardrail of this application not only reduces the deposition of sand and snow particles on the highway surface but also enhances its snow and sand blocking capabilities under adverse geological conditions such as blowing snow or aeolian sand, thus contributing to improved highway traffic safety.

[0091] This application has the following beneficial effects: Based on the highway guardrail structures of the first protection level (A), second protection level (SB), and third protection level (SA) provided in this application, and following the highway guardrail development steps provided in this application, the parameters of the posts, beams, and connectors of the A, SB, and SA highway guardrail series products of this application are modified (such as cross-sectional shape, cross-sectional dimensions (diameter and thickness), number of beams, post spacing, steel type (including general steel and special steel), steel strength, etc.) to form a similar low-drag beam-column roadbed guardrail structure; then, the drag coefficient is calculated according to the drag coefficient calculation method provided in this application, and a beam-column guardrail structure with a drag coefficient less than or equal to 0.25 is selected; then, a collision simulation analysis is performed on the selected beam-column guardrail structure, and a beam-column guardrail structure that meets the collision requirements is selected; finally, a real vehicle collision test is conducted on the selected beam-column guardrail structure, and the beam-column guardrail structure that passes the real vehicle collision test can replace the A, SB, and SA level highway guardrail series products of this application. Figure 1 Corresponds to Class A highway guardrails; Figure 2 Corresponds to SB-grade highway guardrails; Figure 3 Corresponding to SA-grade highway guardrails.

[0092] In the above context, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0093] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0094] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0095] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A low-wind-resistance metal beam-column highway guardrail, characterized in that, Includes columns (1), beams (2), and connectors (3), among which, The lower part of the column (1) is configured to be embedded in the roadbed (4); At least two of the crossbeams (2) are connected from top to bottom to the column (1) via the connector (3); the cross-section of the column (1) and the crossbeams (2) is circular. Under the first protection level, the diameter and wall thickness of the column (1) and / or the beam (2) satisfy the following conditions: In the case of the second protection level, the diameter and wall thickness of the column (1) and / or the beam (2) meet the following conditions: In the case of the third protection level, the diameter and wall thickness of the column (1) and / or the beam (2) meet the following conditions:

2. The low wind resistance metal beam-column highway guardrail as described in claim 1, characterized in that, The connector (3) includes a first connecting part (31) and a second connecting part (32). The first connecting part (31) is connected to the crossbeam (2), and the second connecting part (32) is connected to the column (1).

3. The low wind resistance metal beam-column highway guardrail as described in claim 2, characterized in that, The first connecting part (31) and the second connecting part (32) are connected by welding and / or fasteners; The first connecting part (31) is connected to the crossbeam (2) by welding and / or fasteners; The second connecting part (32) is connected to the column (1) by welding and / or fasteners.

4. The low wind resistance metal beam-column highway guardrail as described in claim 2, characterized in that, The first connecting part (31) and / or the second connecting part (32) are solid structures or hollow structures.

5. The low wind resistance metal beam-column highway guardrail as described in claim 4, characterized in that, When the first connecting part (31) and / or the second connecting part (32) are hollow structures, reinforcing ribs are provided inside the first connecting part (31) and / or the second connecting part (32).

6. The low wind resistance metal beam-column highway guardrail as described in claim 2, characterized in that, Along the height direction, in the connector (3) that connects the uppermost crossbeam (2) to the column (1); The first connecting portion (31) is flush with the second connecting portion (32); and / or The first connecting part (31) is offset upward relative to the second connecting part (32).

7. The low wind resistance metal beam-column highway guardrail as described in claim 3, characterized in that, The first connecting part (31) includes a first connecting arm (311) and a second connecting arm (312) arranged opposite to each other. The first connecting arm (311) has a first contact surface (311a) that is in contact with the crossbeam (2), and the second connecting arm (312) has a second contact surface (312a) that is in contact with the crossbeam (2).

8. The low wind resistance metal beam-column highway guardrail as described in claim 5, characterized in that, The second connecting part (32) includes a mounting wall (321) and a fastening hole (322). The mounting wall (321) fits against the circumferential surface of the column (1), and the fastening hole (322) is connected to the column (1) by a fastener.

9. The low wind resistance metal beam-column highway guardrail as described in claim 2, characterized in that, The second connecting part (32) includes a first sidewall (323) and a second sidewall (324) arranged opposite to each other, and a mounting wall (321) connecting the first sidewall (323) and the second sidewall (324); the first connecting part (31) connects the first sidewall (323) and the second sidewall (324), the first connecting part is a cylindrical structure, and the mounting wall (321) wraps around the portion of the crossbeam (2) in the circumferential direction.

10. The low wind resistance metal beam-column highway guardrail as described in claim 9, characterized in that, Both the first sidewall (323) and the second sidewall (324) extend in a horizontal direction; or both the first sidewall (323) and the second sidewall (324) include a horizontal segment (3241) and an inclined segment (3242), wherein the horizontal segment (3241) extends in a horizontal direction and the inclined segment (3242) is inclined relative to the horizontal segment (3241).

11. The low wind resistance metal beam-column highway guardrail as described in any one of claims 1 to 10, characterized in that, Each of the columns (1) has two beams (2) arranged along the height direction; Each of the columns (1) has three beams (2) arranged along its height.

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