Flange connection low variable guardrail for bridge pier protection

Abstract

The utility model discloses a flange connection low variable guardrail for bridge pier protection belongs to road traffic safety protection technical field. Including three wave board, stand column subassembly, crossbeam and flange connection structure. Three wave board is detachably connected through crossbeam bracket and crossbeam, and the crossbeam is fixed with stand column subassembly through the sleeve pipe, and the inside of stand column subassembly is equipped with inner bushing pipe and forms composite support structure, and the bottom is anchored with high -strength bolt and forms flange connection structure through flange plate, and the guardrail is single -sided independent type steel modular structure. The design is through composite support and low deformation control, and effectively protects bridge pier and reduces the passenger injury when large -scale vehicle collision, and the installation and maintenance efficiency of space limited scene is improved relying on flange connection and modular design, fills the bridge pier special protection facility blank, and is applicable to the roadside and the protection of the middle split thin -walled pier.

Description

Technical Field

[0001] This utility model belongs to the field of road traffic safety protection technology, specifically relating to a flange-connected low-variability guardrail for bridge pier protection. Background Technology

[0002] Bridge piers, as key structures in highways, are often located on the roadside or in the median strip. While ensuring the stability of the road structure, they also become potential road obstacles due to their abruptness in the driving path. When large vehicles lose control and collide with bridge piers, it can easily cause serious consequences such as damage and breakage of the piers, resulting in huge economic losses, vehicle damage, casualties, and a negative social impact.

[0003] Bridge pier protection needs to address two key requirements: first, to prevent damage or destruction to the piers from vehicle collisions, thus avoiding secondary accidents; and second, to reduce the loss of life and property to vehicles and their occupants after a collision with a bridge pier. However, there is currently a significant technological gap both domestically and internationally in the development of dedicated safety facilities for bridge pier protection. Insufficient protection: Existing guardrails are mostly designed for general road scenarios and are not specifically adapted to the structural characteristics of bridge piers (especially thin-walled piers), making it difficult to achieve effective protection in space-constrained areas such as bridge piers close to the roadside or median strips; Inadequate performance adaptability: Traditional guardrails are difficult to effectively control the amount of deformation and the degree of vehicle tilting when large vehicles collide, which can easily cause vehicles to break through the guardrail and directly hit the bridge pier, or cause excessive deformation to squeeze the bridge pier structure. They cannot simultaneously meet the dual needs of bridge pier protection and occupant protection. Poor installation and adaptability: The space around the bridge piers close to the roadside or the thin-walled piers in the median strip is narrow. The existing guardrail connection structure is complicated to install, has poor adaptability, is difficult to deploy quickly, and has high maintenance costs.

[0004] In summary, there is a lack of existing technologies that can meet the requirements for deformation control and outward tilt equivalent value during large vehicle collisions, and can be easily installed, specifically for the characteristics of bridge piers (especially thin-walled piers). There is an urgent need to develop new guardrail structures that are suitable for bridge pier protection scenarios. Utility Model Content

[0005] In view of this, the present invention aims to overcome the shortcomings of the prior art and provide a flange-connected low-deformation guardrail for bridge pier protection. It is intended to fill the gap in dedicated protective facilities for bridge piers close to the roadside or thin-walled piers in the median strip. Through a low-deformation structural design, it effectively controls the lateral dynamic deformation of the guardrail and the degree of vehicle tilting during large vehicle collisions, taking into account both the needs of bridge pier protection and occupant protection. At the same time, relying on the flange connection structure to optimize the ease of installation and structural stability in space-constrained scenarios, it provides a modular steel guardrail that can be used on one side, improving the adaptability, durability and maintenance convenience of bridge pier protection.

[0006] To achieve the above objectives, this utility model provides a flange-connected low-variability guardrail for bridge pier protection, comprising a three-wave plate, a column assembly, a crossbeam, and a flange connection structure. The three-wave plate comprises segments of different lengths, adjacent segments are connected by bolt lap joints, and the lap length meets predetermined mechanical strength requirements. The three-wave plate is detachably connected to the crossbeam via a crossbeam bracket, and the crossbeam is fixed to the column assembly via a sleeve. The inner side of the column assembly is provided with an inner lining sleeve, which is welded and fixed to the column assembly to form a composite support structure; The column assembly is provided with a flange at the bottom, and bolt holes are evenly distributed on the flange. It is anchored to the concrete foundation by high-strength bolts to form the flange connection structure. The strength grade and number of the bolts meet the predetermined pull-out and shear resistance requirements. The guardrail is a single-sided independent steel structure, suitable for protecting bridge piers close to the roadside or thin-walled piers in the median strip.

[0007] Furthermore, the crossbeam is connected to the column assembly via a crossbeam sleeve, and the crossbeam sleeve is welded and fixed to the column assembly to form a rigid connection node.

[0008] Furthermore, one end of the crossbeam bracket is welded to the column assembly, and the other end is connected to the three-wave plate by bolts, wherein the specifications and quantity of the bolts meet the predetermined connection strength requirements.

[0009] Furthermore, when the guardrail is subjected to a predetermined impact load, its maximum lateral dynamic deformation value does not exceed a preset threshold, and the maximum lateral dynamic displacement extension value (W) of the guardrail meets the low deformation requirement.

[0010] Furthermore, the three-wave plate is made of high-strength steel, and its cross-sectional shape and thickness are designed to meet the predetermined requirements for bending and impact resistance.

[0011] Furthermore, the longitudinal spacing of the column assembly is adaptively adjusted according to the pier spacing and protection level, and the net distance between the column assembly and the pier meets the predetermined installation and protection requirements.

[0012] Furthermore, the guardrail adopts a modular design, and the three-wave plate, the post assembly and the crossbeam are all standardized prefabricated components. Adjacent modules can be quickly spliced ​​together through the flange connection structure.

[0013] The present invention, by adopting the above technical solution, has at least the following beneficial effects: In this utility model, the segmented bolt lap design of the three-wave plate and the detachable connection between the crossbeam bracket and the crossbeam not only ensure the overall structural strength of the guardrail, but also realize the flexible assembly and replacement of components, solving the problems of traditional guardrail connection and fixation and inconvenient maintenance. It is especially suitable for the rapid deployment needs of roadside or median strip space-constrained scenarios.

[0014] In this invention, an inner lining sleeve is provided on the inner side of the column assembly to form a composite support structure. Combined with the anchoring design of the bottom flange and high-strength bolts, the impact resistance and structural stability of the guardrail are significantly improved. In the event of a large vehicle collision, it can effectively control the lateral dynamic deformation and displacement extension value, preventing vehicles from breaking through the guardrail and hitting the bridge pier, and reducing the compression of the bridge pier by the deformation of the guardrail, thus meeting the dual needs of bridge pier protection and occupant protection.

[0015] In this utility model, the single-sided independent steel structure and the standardized prefabricated components with modular design not only fill the gap in special protective facilities for roadside bridge piers or thin-walled piers in median strips, but also realize the rapid splicing between modules through flange connection, reducing installation difficulty and maintenance costs. At the same time, the selection of steel materials enhances the durability of the guardrail and extends its service life. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an elevation view of the flange connection low-variability guardrail of this utility model; Figure 2 This is a plan view of the flange connection low-variability guardrail of this utility model; Figure 3 yes Figure 2 AA diagram; Figure 4 This is a flange plan view of this utility model.

[0018] In the diagram: 1. Three-wave plate; 2. Column assembly; 3. Crossbeam; 4. Flange; 5. Crossbeam bracket; 6. Sleeve; 7. Inner liner sleeve. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.

[0020] like Figures 1 to 4 As shown, this embodiment provides a flange-connected low-variance guardrail for bridge pier protection, including a three-wave plate 1, a column assembly 2, a crossbeam 3, and a flange connection structure. The three-wave plate 1 includes segments of different lengths, and adjacent segments are connected by bolts, with the overlap length meeting the predetermined mechanical strength requirements; the three-wave plate 1 is detachably connected to the crossbeam 3 via the crossbeam bracket 5, and the crossbeam 3 is fixed to the column assembly 2 via the sleeve 6; The inner side of the column assembly 2 is provided with an inner liner sleeve 7, which is welded and fixed to the column assembly 2 to form a composite support structure. This composite support structure can significantly improve the bending resistance of the column assembly 2 through the synergistic force of the inner and outer steel layers, and can effectively disperse the impact force, especially in the event of a side impact from a large vehicle. The bottom of the column assembly 2 is provided with a flange 4, and bolt holes are evenly distributed on the flange 4. It is anchored to the concrete foundation by high-strength bolts to form the flange connection structure. The strength grade and number of the bolts meet the predetermined pull-out and shear resistance requirements. During installation, the horizontal adjustment can be made through the waist-shaped bolt holes on the flange 4 to ensure that the overall axis of the guardrail is aligned with the protection requirements of the pier. The guardrail is a single-sided independent steel structure, suitable for protection of bridge piers close to the roadside or thin-walled piers in the median strip. Its single-sided structural design can reduce the occupation of road traffic space, and is especially suitable for installation in narrow median strip areas.

[0021] In one embodiment, the crossbeam 3 is connected to the column assembly 2 via a crossbeam sleeve. The crossbeam sleeve is welded and fixed to the column assembly 2 to form a rigid connection node. The crossbeam sleeve is provided with reinforcing ribs to further enhance the shear strength at the connection between the crossbeam 3 and the column assembly 2 and to prevent connection failure during collision.

[0022] In one embodiment, one end of the crossbeam bracket 5 is welded to the column assembly 2, and the other end is connected to the three-wave plate 1 by bolts. The specifications and quantity of the bolts meet the predetermined connection strength requirements. An elastic gasket is provided between the crossbeam bracket 5 and the three-wave plate 1 to reduce the rigid impact during vehicle collision and prevent the bolts from loosening.

[0023] As one implementation method, when the guardrail is subjected to a predetermined impact load, its maximum lateral dynamic deformation value does not exceed a preset threshold, and the maximum lateral dynamic displacement extension value (W) of the guardrail meets the low deformation requirement. Through the synergistic effect of the wave-shaped cross-section design of the three-wave plate 1 and the composite support structure, the protection logic of "absorbing collision energy with controllable deformation" is realized, which not only protects the bridge pier from direct impact, but also reduces the impact on vehicle occupants.

[0024] As one implementation method, the three-wave plate 1 in this embodiment is made of high-strength steel (such as Q355 steel). Its cross-sectional shape and thickness design meet the predetermined requirements for bending and impact resistance. The steel surface is hot-dip galvanized with a coating thickness of ≥85μm, which can effectively improve the corrosion resistance of the guardrail in complex environments such as humid and dusty conditions and extend its service life.

[0025] As one implementation method, the longitudinal spacing of the column assembly 2 in this embodiment is adaptively adjusted according to the pier spacing and protection level. The net distance between the column assembly 2 and the pier meets the predetermined installation and protection requirements. For vulnerable pier structures such as thin-walled piers, the net distance setting can ensure that the pier body is not squeezed when the guardrail deforms, while reserving sufficient buffer space.

[0026] As one implementation method, the guardrail in this embodiment adopts a modular design. The three-wave plate 1, the post assembly 2, and the crossbeam 3 are all standardized prefabricated components. Adjacent modules can be quickly spliced ​​together through the flange connection structure. The weight of a single module is controlled within a range that is easy to handle manually or with small machinery. No large hoisting equipment is required during installation, which significantly improves construction efficiency. In later maintenance, damaged parts can be replaced individually, reducing the total life cycle cost.

[0027] The flange-connected low-deformation guardrail for bridge pier protection described in this embodiment, through the coordinated design of the three-wave plate, column assembly, beam, and flange connection structure, forms a dedicated safety facility suitable for protecting bridge piers near the roadside and thin-walled piers in the median strip. Its composite support structure, rigid flange anchoring, and modular splicing design not only achieve low deformation control during large vehicle collisions, effectively protecting bridge piers from impact damage and reducing the risk of injury to occupants, but also fills the gap in existing dedicated bridge pier protection facilities through its single-sided independent layout and convenient installation and maintenance characteristics, providing a high-quality and highly adaptable solution for road bridge pier safety protection.

[0028] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A flange-connected low-variance guardrail for bridge pier protection, comprising a three-wave plate (1), a column assembly (2), a crossbeam (3), and a flange connection structure, characterized in that: The three-wave plate (1) includes segments of different lengths, and adjacent segments are connected by bolts, with the overlap length meeting the predetermined mechanical strength requirements; the three-wave plate (1) is detachably connected to the crossbeam (3) through the crossbeam bracket (5), and the crossbeam (3) is fixed to the column assembly (2) through the sleeve (6); The inner side of the column assembly (2) is provided with an inner liner sleeve (7), and the inner liner sleeve (7) is welded and fixed to the column assembly (2) to form a composite support structure; The bottom of the column assembly (2) is provided with a flange (4), and bolt holes are evenly distributed on the flange (4). The flange is anchored to the concrete foundation by high-strength bolts to form the flange connection structure. The strength grade and number of the bolts meet the predetermined pull-out and shear resistance requirements. The guardrail is a single-sided independent steel structure, suitable for protecting bridge piers close to the roadside or thin-walled piers in the median strip.

2. The guardrail according to claim 1, characterized in that: The crossbeam (3) is connected to the column assembly (2) through the crossbeam sleeve. The crossbeam sleeve is welded and fixed to the column assembly (2) to form a rigid connection node.

3. The guardrail according to claim 1, characterized in that: One end of the crossbeam bracket (5) is welded to the column assembly (2), and the other end is connected to the three-wave plate (1) by bolts. The specifications and quantity of the bolts meet the predetermined connection strength requirements.

4. The guardrail according to claim 1, characterized in that: When the guardrail is subjected to a predetermined impact load, its maximum lateral dynamic deformation value does not exceed a preset threshold, and the maximum lateral dynamic displacement extension value (W) of the guardrail meets the low deformation requirement.

5. The guardrail according to claim 1, characterized in that: The three-wave plate (1) is made of high-strength steel, and its cross-sectional shape and thickness are designed to meet the predetermined requirements for bending and impact resistance.

6. The guardrail according to claim 1, characterized in that: The longitudinal spacing of the column assembly (2) is adaptively adjusted according to the pier spacing and protection level, and the net distance between the column assembly (2) and the pier meets the predetermined installation and protection requirements.

7. The guardrail according to claim 1, characterized in that: The guardrail adopts a modular design. The three-wave plate (1), the column assembly (2) and the crossbeam (3) are all standardized prefabricated components. Adjacent modules can be quickly spliced ​​together through the flange connection structure.

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