Guardrail structure

Abstract

The utility model provides a guardrail structure, through the improvement of guardrail structure, has improved the guardrail structure's ventilation rate of being able to adapt to the high -grade highway protection demand. Guardrail structure includes a plurality of crossbeam and is used to support the upright column of crossbeam along vertical distribution, the cross section of crossbeam is all flat ellipse, the crossbeam includes narrow edge part, and the narrow edge part of crossbeam is opposite with upright column along the thickness direction of guardrail structure and fixedly connected.

Description

Technical Field

[0001] This utility model relates to the field of road protection technology, specifically to a guardrail structure. Background Technology

[0002] In areas prone to blowing snow and sand, traditional guardrail structures significantly impede the flow of snow and sand, easily causing snow and sand accumulation on road sections and leading to traffic accidents. While cable-stayed guardrails reduce this obstruction, they have a large deformation range and relatively weak protective capabilities, with the highest safety protection level only at SB level, which cannot meet the protection requirements of high-grade highways. Utility Model Content

[0003] The purpose of this utility model is to provide a guardrail structure that improves the ventilation rate of the guardrail structure to meet the safety protection requirements of high-grade highways.

[0004] To achieve the above objectives, this utility model provides a guardrail structure, which includes a plurality of horizontal beams arranged vertically and columns for supporting the horizontal beams. The cross-section of each horizontal beam is a flat ellipse, and each horizontal beam includes a narrow side portion. The narrow side portion of the horizontal beam and the column are opposite to and fixedly connected to each other along the thickness direction of the guardrail structure.

[0005] By adopting the method described in this application, the structure of flat elliptical columns and beams can achieve a safety protection level of SA (level 5) for the guardrail structure, which can meet the needs of most high-grade highways while improving the ventilation rate of the guardrail structure.

[0006] Optionally, the cross-section of the post is also a flat ellipse, and the post includes a narrow side portion. The narrow side portion of the post and the narrow side portion of the crossbeam are opposite to and fixedly connected along the thickness direction. This further increases the ventilation rate of the guardrail structure.

[0007] Optionally, both the beam and the column also include long sides, with the long sides of the beam facing each other vertically and the long sides of the column facing each other along the extension direction of the beam.

[0008] This ensures that the structures of the posts and beams are consistent, thereby improving the structural strength of the guardrail.

[0009] Optionally, the cross-sectional dimensions of the beams and columns are the same; or, the cross-sectional dimensions of the beams and columns are different. This achieves the effect of "strong beams and weak columns," improving the impact resistance of the guardrail structure.

[0010] Optionally, the crossbeams include a first crossbeam, a second crossbeam, and a third crossbeam. The distances from the ground to the first crossbeam are h1, h2, and h3, respectively, where 35cm ≤ h1 ≤ 60cm, 80cm ≤ h2 ≤ 100cm, and 110cm ≤ h3 ≤ 130cm. Within this range, the ventilation rate of the guardrail structure can be further increased.

[0011] Optionally, h1 is 45cm, h2 is 90cm and h3 is 120cm.

[0012] This allows for a reduction in the overall height of the guardrail while ensuring the ventilation rate of the guardrail structure.

[0013] Optionally, the columns are spaced at intervals s1 along the extension direction of the beam, with a spacing of 1.5m ≤ s1 ≤ 3m; and / or, the height of the top of the column from the ground is h4, with a spacing of 119cm ≤ h4 ≤ 139cm. This ensures both the protection level and the ventilation rate of the guardrail structure.

[0014] Alternatively, h4 can be 129cm. This reduces the overall height of the guardrail structure.

[0015] Optionally, the post also includes a pile segment for embedding in the ground, the vertical dimension of which is greater than or equal to 120cm. This improves the impact resistance of the guardrail structure.

[0016] Optionally, it also includes a connecting sleeve that can be built into the crossbeam, the connecting sleeve being fitted to the inner wall of the crossbeam; at least one of the crossbeams and posts has a plate thickness greater than or equal to 6mm. This improves the impact resistance of the guardrail structure.

[0017] Optionally, the average tensile strength of at least one of the connecting sleeve, crossbeam, and post is greater than or equal to 355 MPa. This improves the tensile strength of the guardrail structure and enhances its impact resistance.

[0018] Optionally, it also includes a blocking block, the blocking block having a first connecting section for fixed connection with the column and a second connecting section for fixed connection with the crossbeam;

[0019] The first and second connecting sections are spaced apart to form a buffer section. The buffer block is equipped with a buffer section to prevent the posts from deforming after the guardrail structure is impacted.

[0020] Optionally, it also includes a column cap structure disposed at the top of the column, the column cap structure being connected to a wind power generation device.

[0021] Optionally, the guardrail structure may also be equipped with post delineators, which are set on the posts.

[0022] Optionally, an anti-glare panel is also provided at the top of the column. The anti-glare panel is made of basalt fiber and is molded from basalt material in one piece.

[0023] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0025] Figure 1 This is a schematic diagram of the guardrail structure in an embodiment of this utility model;

[0026] Figure 2 yes Figure 1 A top view of a partial structure;

[0027] Figure 3 yes Figure 2 A magnified schematic diagram of a local structure;

[0028] Figure 4 yes Figure 1 One of the side views;

[0029] Figure 5 yes Figure 4 A magnified schematic diagram of a local structure;

[0030] Figure 6 yes Figure 1 The second side view.

[0031] Figure label:

[0032] 1-Column; 11-Pile segment; 21-First crossbeam; 22-Second crossbeam; 23-Third crossbeam; 24-Beam segment; 3-Connecting sleeve; 4-Anti-blocking block; 41-First connecting section; 42-Second connecting section; 43-Transition section; 51a-First long side; 51b-First narrow side; 52a-Second long side; 52b-Second narrow side; 6-Delineator; 7-Anti-glare plate. Detailed Implementation

[0033] This utility model provides a guardrail structure that improves the ventilation rate of the guardrail structure to meet the protection requirements of high-grade highways.

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0036] In areas prone to blowing snow and sand, traditional rigid guardrail structures significantly impede snow and wind flow, easily causing snow accumulation on roads, leading to traffic accidents and posing a significant threat to traffic safety. Specifically, the permeability of SA-grade concrete F-type guardrails is 0%, while SA-grade corrugated beam guardrails have a permeability of 52%. In some snow-blocked sections, bridge approach ramps using SA-grade beam-column guardrails have a permeability of 56%, all resulting in significant sand and snow obstruction. In areas prone to sand and snow damage, the disturbance of the near-surface airflow field caused by low-permeability guardrails is a major contributing factor to road blockages.

[0037] The SA level of safety protection refers to the SA level (level 5) protection level requirements in the "Evaluation Standard for Safety Performance of Highway Guardrails" (JTG B05-01-2013).

[0038] Another type of rope guardrail has a ventilation rate of over 85%, and the rate and scale of sand and snow accumulation are relatively much smaller. However, due to its special flexible structure, its impact resistance is severely limited, and it can only reach the SB level of safety protection, making it difficult to use on high-grade highways.

[0039] Air permeability refers to the ability of a fence structure to allow natural elements such as wind, snow, or sand to pass through it, usually expressed as a percentage. Specifically, air permeability reflects the ratio of the area of ​​the openings perpendicular to the airflow direction to the total area of ​​the fence structure. A higher air permeability indicates less obstruction of wind, snow, or sand, allowing more natural elements to pass through; conversely, a lower air permeability indicates greater obstruction.

[0040] like Figures 1 to 6 , Figure 1 This is a schematic diagram of the guardrail structure in an embodiment of this utility model; Figure 2 yes Figure 1 A top view of a partial structure; Figure 3 yes Figure 2 A magnified schematic diagram of a local structure; Figure 4 yes Figure 1 One of the side views; Figure 5 yes Figure 4 A magnified schematic diagram of a local structure; Figure 6 yes Figure 1 The second side view.

[0041] Please refer to Figure 1 and Figure 3 as well as Figure 5 As shown, this utility model provides a guardrail structure with a protection level of SA. The guardrail structure has a length direction extending in the same direction as the crossbeam, that is, the extension direction of the guardrail structure, a thickness direction perpendicular to the length direction, and a height direction perpendicular to the length direction and the thickness direction, that is, a vertical direction.

[0042] The guardrail structure includes several horizontal beams arranged vertically and columns 1 for supporting the horizontal beams. The cross-section of the horizontal beams is flat elliptical and has a narrow side. The narrow side of the horizontal beams and the columns are opposite to and fixedly connected to each other along the thickness direction of the guardrail structure.

[0043] The crossbeams extend horizontally and are spaced out vertically. A portion of the column 1 is fixed to the ground, while another portion protrudes above the ground and is fixedly connected to several crossbeams. The column 1 and the crossbeams can be connected by welding, by using anti-blocking blocks 4, or by other connection methods, which can be chosen by those skilled in the art.

[0044] By adopting the method described in this application, the structure of flat elliptical columns 1 and beams can achieve a safety protection level of SA for the guardrail structure, while also improving the ventilation rate of the guardrail structure.

[0045] As an alternative example, both the cross-section of the beam and column 1 are planar elliptical, with the narrow side of the beam facing and fixedly connected to the narrow side of column 1. Of course, the cross-section of column 1 can also be quadrilateral, circular, etc., in addition to planar elliptical.

[0046] The cross-section of column 1 along the horizontal plane is a planar ellipse, and the cross-section of the beam along the vertical plane is also a planar ellipse; both have the same cross-sectional shape. The "planar ellipse" is racetrack-shaped, with two opposing straight walls as long sides. At each end of the two long sides are two arc-shaped narrow sides, located on the same circumference. Both the beam and column 1 include connected arc-shaped narrow sides and straight long sides. The long sides of the beam are vertically opposite, and the narrow sides are opposite along the thickness direction. The long sides of column 1 are opposite along the extension direction of the beam.

[0047] The narrow sides of the crossbeam are opposite each other along the thickness direction, and the narrow sides of the column 1 are also opposite each other along the thickness direction. The narrow sides of the column 1 and the narrow sides of the crossbeam are opposite each other along the thickness direction and are fixedly connected.

[0048] Specifically, the narrow side of the crossbeam is the first narrow side 51b, the long side of the crossbeam is the first long side 51a, the narrow side of the column 1 is the second narrow side 52b, and the long side of the column 1 is the second long side 52a.

[0049] Combination Figure 3 , Figure 5 The content shown is as follows. Figure 3 This is a top view of the guardrail structure. Figure 5 This is a side view of the guardrail structure. Figure 3 The thickness of the central guardrail structure is along the top and bottom of the paper. Figure 5 The thickness of the central guardrail structure is in the left-right direction of the paper surface.

[0050] exist Figure 3 The end face of column 1 is shown in the figure. Figure 3 In the figure, the column 1 has two second narrow sides 52b opposite each other along the thickness direction. The top surface of the beam is the first long side 51a, and a portion of the first narrow side 51b is shown where it meets the first long side 51a.

[0051] like Figure 5 The content shown, Figure 5 The end face of the beam is shown, which fully demonstrates the cross-sectional shape of the beam. Figure 5 In the crossbeam, the two first long sides 51a are vertically opposite each other, and the two first narrow sides 51b are horizontally opposite each other in the thickness direction. Conversely, only one side of the column 1, the second long side 52a, and the portion of the second narrow side 52b connected to the second long side 52a are shown. The second narrow side 52b is opposite to the first narrow side 51b in the thickness direction.

[0052] Therefore, the dimension occupied in the thickness direction of the guardrail structure ensures the safety protection level of the guardrail structure.

[0053] In this embodiment, the cross-sectional dimensions of the beam and the column 1 are identical. That is, the cross-section of the beam and the cross-section of the column 1 can overlap. The beam and the column 1 are formed as a single tubular component, which is then cut to different lengths to form the beam and column 1 respectively. This achieves a "strong beam, weak column" effect, improving the impact resistance of the guardrail structure. Of course, the cross-sectional dimensions of the beam and the column 1 can also be different. Those skilled in the art can choose according to their needs to achieve the "strong beam, weak column" effect.

[0054] In some specific implementations, the number of crossbeams is three, but it can also be more or fewer, depending on the need to increase ventilation and ensure a safety protection level of SA.

[0055] In the technical solution of this application, a first reference plane with a height of 1m and extending vertically is defined. The area of ​​the projected region formed by projecting the beam and column 1 horizontally onto the first reference plane is the blocking area, and the ratio of the blocking area to the first reference plane is less than or equal to 30%. Within this range, its ventilation rate is significantly increased compared with traditional guardrail structures.

[0056] Furthermore, the ratio of the blocking area to the first reference surface is less than or equal to 15%. Within this range, the guardrail structure can further prevent snow and sand accumulation on the road surface.

[0057] In such Figure 1 In the example shown, the beams include a first beam 21, a second beam 22, and a third beam 23, which are arranged alternately from bottom to top. The distances from the ground to the first beam 21 are h1, to the second beam 22 h2, and to the third beam 23 h3, respectively, where 35cm ≤ h1 ≤ 60cm, 80cm ≤ h2 ≤ 100cm, and 110cm ≤ h3 ≤ 130cm. The height of each beam from the ground is the distance from its vertical midpoint to the ground.

[0058] Within this range, the ventilation rate of the guardrail structure can be further increased. Optionally, h1 is 45cm, h2 is 90cm, and h3 is 120cm. Within the above range, the ratio of the blocking area to the first reference surface can be guaranteed to be less than or equal to 15%.

[0059] In other embodiments, as an example, the columns 1 are spaced apart by a distance s1 along the extension direction of the beam, where 1.5m ≤ s1 ≤ 3m; or, the height of the top of the column 1 from the ground is h4, where 119cm ≤ h4 ≤ 139cm. In another example, adjacent columns 1 are spaced apart by a distance s1 along the extension direction of the beam, where 1.5m ≤ s1 ≤ 3m, and the height of the top of the column 1 from the ground is h4, where 119cm ≤ h4 ≤ 139cm. Optionally, h4 is 129cm. This ensures both the protection level and the ventilation rate of the guardrail structure.

[0060] In the above embodiment, the post 1 also includes a pile segment 11 for burying in the ground, the vertical dimension of the pile segment 11 being greater than or equal to 120cm. This improves the impact resistance of the guardrail structure.

[0061] like Figure 2 As shown, to connect the crossbeams, the guardrail structure also includes connecting sleeves 3 that can be built into two adjacent beam segments 24 of the crossbeam. The connecting sleeves 3 fit snugly against the inner wall of the crossbeam. Several threaded holes are provided on the connecting sleeves 3, and threaded holes are also provided on the end of the crossbeam that matches the connecting sleeves 3. The connecting sleeves 3 are threadedly connected to the crossbeam.

[0062] The cross-sectional shape of the connecting sleeve 3 matches the internal shape of the beam. Each beam consists of several beam segments 24 connected sequentially. Part of the connecting sleeve 3 is embedded in one of two adjacent beam segments 24, and part is embedded in the other of two adjacent beam segments 24. Then, the connecting sleeve 3 is threadedly connected to the corresponding beam segment 24.

[0063] In the aforementioned embodiment, the thickness of the plate of at least one of the beams and posts 1 is greater than or equal to 6 mm. This improves the impact resistance of the guardrail structure.

[0064] Optionally, the average tensile strength of at least one of the connecting sleeve 3, the crossbeam, and the post 1 is greater than or equal to 355 MPa. The guardrail structure uses high-strength steel with high tensile strength, and the steel consumption is only 52.6 kg / m, which is about 22% lower than the 65.7 kg / m steel consumption of the SA-level (Level 5) guardrail structure on the market. This reduces the amount of steel used in the guardrail production process, achieving the effect of less steel consumption, better performance indicators, and stronger protection level.

[0065] Disturbance of windblown sand (snow) flow is key to the formation of sand (snow) accumulation on roads. Since guardrails operate in the ground-level air layer, the design of guardrail structures that minimize disturbance to the ground-level airflow field is crucial. When the air permeability below 1 meter exceeds 85%, snow resistance is significantly reduced. By adopting the technical solution of this application, the air permeability of the guardrail structure below 1 meter reaches 88%, meaning the ratio of the blocking area to the first reference surface is 12%. Simulation and wind tunnel experiments demonstrate that this guardrail structure can mitigate sand and snow accumulation disasters on highways in special road areas.

[0066] In the aforementioned embodiments, the guardrail structure further includes a buffer block 4, which has a first connecting section 41 for fixed connection with the post 1 and a second connecting section 42 for fixed connection with the crossbeam. The first connecting section 41 and the second connecting section 42 are spaced apart to form a buffer section. The first connecting section 41, the second connecting section 42, and the buffer section are distributed along the thickness direction of the guardrail structure, with the buffer section located between the first connecting section 41 and the second connecting section 42. The buffer block is provided with a buffer section to prevent the post 1 from deforming after the guardrail structure is impacted.

[0067] The first connecting section 41 has a first receiving groove for embedding the post 1, and the second connecting section 42 has a second receiving groove for embedding the crossbeam. The first receiving groove passes vertically through the anti-blocking block 4, and the second receiving groove passes horizontally through the anti-blocking block 4. The guardrail structure also includes connecting bolts, which pass through the post 1 and the first receiving groove in sequence to connect the post 1 to the first receiving groove. The connecting bolts also pass through the crossbeam and the second receiving groove in sequence to connect the crossbeam to the second receiving groove.

[0068] In other embodiments, the guardrail structure further includes a post cap structure disposed at the top of the post, the post cap structure being connected to a wind power generation device. The wind power generation device is used to power the early warning device. The post cap structure has a base that is fixedly connected to the top of the post 1. Thus, when the wind force exceeds a set threshold, the wind power generation device starts to operate and power the early warning device.

[0069] In other embodiments, the guardrail structure is further provided with post-type delineators 6, which are installed on the posts 1. The delineators 6 have a trapezoidal cross-sectional shape. When the main line travels in the left direction, the delineators 6 are yellow; when the main line travels in the right direction, the delineators 6 are white. The reflective surface is made of a high-transmittance material.

[0070] In some other embodiments, an anti-glare plate 7 is also provided at the top of the column 1. The anti-glare plate 7 is made of basalt fiber and is integrally molded from basalt material. It includes the anti-glare plate body and the base. The base is provided with base connection holes for fixing the basalt anti-glare plate 7.

[0071] In some embodiments, a vibration cable is also provided on the second crossbeam 22, and the vibration cable is equipped with tension sensors arranged at intervals. The tension sensors are connected to the alarm signal. The distance between two adjacent tension sensors is between 45m and 70m (including the endpoint value). Thus, an alarm can be triggered after deformation of the guardrail structure is detected.

[0072] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A barrier structure, characterised in that, It includes several horizontal beams arranged vertically and columns (1) for supporting the horizontal beams. The cross-section of each horizontal beam is a flat ellipse. Each horizontal beam includes a narrow side. The narrow side of the horizontal beam is opposite to and fixedly connected to the column (1) along the thickness direction of the guardrail structure.

2. A barrier structure according to claim 1, characterised in that The cross section of the column (1) is also a flat ellipse. The column (1) includes a narrow side portion. The narrow side portion of the column (1) is opposite to and fixedly connected to the narrow side portion of the crossbeam along the thickness direction.

3. A barrier structure according to claim 2, characterised in that The crossbeams include a first crossbeam (21), a second crossbeam (22), and a third crossbeam (23). The distance between the first crossbeam (21) and the ground is h1, the distance between the second crossbeam (22) and the ground is h2, and the distance between the third crossbeam (23) and the ground is h3. 35cm≤h1≤60cm, 80cm≤h2≤100cm, and 110cm≤h3≤130cm.

4. The guardrail structure according to claim 3, characterized in that, h1 is 45cm, h2 is 90cm and h3 is 120cm.

5. The fence structure of claim 1, wherein, The distance between two adjacent columns (1) along the extension direction of the crossbeam is set at s1, 1.5m≤s1≤3m; and / or, the height of the top of the column (1) from the ground is h4, 119cm≤h4≤139cm.

6. A barrier structure according to claim 5, characterised in that h4 is 129cm.

7. The guardrail structure according to claim 1, characterized in that, The column (1) also includes a pile segment (11) for burying in the ground, the vertical dimension of the pile segment (11) being greater than or equal to 120cm.

8. The fence structure of claim 1, wherein, It also includes a connecting sleeve (3) that can be built into the crossbeam, the connecting sleeve (3) being fitted to the inner wall of the crossbeam.

9. The fence structure of claim 1, wherein, The cross-sectional dimensions of the beam and the column (1) are consistent; or, The cross-sectional dimensions of the beam and the column (1) are different.

10. The fence structure of claim 1, wherein, It also includes a blocking block (4), which has a first connecting section (41) for fixed connection with the column (1) and a second connecting section (42) for fixed connection with the crossbeam; The first connecting segment (41) and the second connecting segment (42) are spaced apart to form a buffer segment.

11. A barrier structure according to any one of claims 1-10, characterised in that The crossbeam and the column (1) also include a long side connected to the narrow side. The two long sides of the crossbeam are opposite each other in the vertical direction, and the two long sides of the column (1) are opposite each other in the extension direction of the crossbeam.

12. A barrier structure according to any one of claims 1-10, characterised in that The safety protection level of the guardrail structure is SA level.

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