A guard rail

Abstract

The utility model relates to the field of road and bridge, the utility model discloses a guardrail, it includes baffle, energy -absorbing box and multiple left and right direction arrangement's stand, the stand is used for and ground fixed connection, the baffle sets two, two baffle's length all along left and right direction extension, two baffle interval arrangement along front -back direction, all stand is established between two adjacent baffle, two baffle respectively with stand fixed connection, energy -absorbing box sets up multiple, and the energy -absorbing box is set up between the similar stand, and the energy -absorbing box is connected with baffle.

Description

Technical Field

[0001] This utility model relates to the field of road and bridge technology, and in particular to a guardrail. Background Technology

[0002] In the field of road and bridge engineering, protective guardrail systems are commonly installed on both sides of bridges. Traditional guardrail structures typically employ a combination of "panels and posts," and their core mechanism for absorbing vehicle collision energy relies primarily on the plastic bending deformation of the panels and posts under immense impact force. However, when encountering heavy vehicles or collisions at unfavorable angles, this type of traditional guardrail structure often exhibits significant limitations. The connection between the panels and posts is highly susceptible to failure, leading to the posts being pulled out of their foundations or the guardrail system undergoing extensive bending deformation. This structural failure results in the immediate loss of the guardrail's protective function, rendering it ineffective in stopping or guiding out-of-control vehicles. Utility Model Content

[0003] The technical problem to be solved by this utility model is to solve at least one of the technical problems mentioned above.

[0004] The solution to the technical problem of this utility model is: A guardrail includes baffles, energy-absorbing boxes, and multiple posts arranged in a left-right direction. The posts are fixedly connected to the ground. Two baffles are provided, both extending in the left-right direction and spaced apart in the front-back direction. All the posts are located between adjacent baffles, and each baffle is fixedly connected to a post. Multiple energy-absorbing boxes are provided, with energy-absorbing boxes placed between adjacent posts, and the energy-absorbing boxes are connected to the baffles.

[0005] As a further improvement to the above technical solution, the baffle is a waveform plate, and all the waveforms of the waveform plate are arranged vertically, with the front and rear baffles being mirror images of each other.

[0006] As a further improvement to the above technical solution, the front and rear sides of the energy-absorbing box are matched with the corrugated plate.

[0007] As a further improvement to the above technical solution, the energy-absorbing box is provided with multiple through holes that penetrate the energy-absorbing box in the left-right direction.

[0008] As a further improvement to the above technical solution, the through hole is hexagonal.

[0009] As a further improvement to the above technical solution, the guardrail also includes bolts. The post has a first positioning hole and a second positioning hole. The bolt passes through the first positioning hole and the second positioning hole to lock the post and the baffle.

[0010] As a further improvement to the above technical solution, the bolt includes a bolt head and a threaded rod, a gap is provided between the first positioning hole and the second positioning hole, and a groove is provided on the outer wall of the threaded rod, the groove being located at the gap.

[0011] As a further improvement to the above technical solution, the bolt includes a bolt head and a threaded rod. The bolt head has a countersunk hole that extends into the threaded rod. A gap is provided between the first positioning hole and the second positioning hole, and the countersunk hole extends to the gap.

[0012] As a further improvement to the above technical solution, the column includes a column body and a chassis, the chassis is fixed to the ground by screws, and the column body is fixed to the chassis.

[0013] The beneficial effects of this invention are as follows: By adopting a structural design with double baffles, multiple columns, and an energy-absorbing box, the energy absorption path and force dispersion mechanism are optimized. Two baffles arranged at intervals are fixedly connected by columns, forming a multi-layered structure, improving overall structural stability and avoiding the tendency of traditional single baffles to bend. The energy-absorbing box between adjacent columns serves as the core energy absorption element, preferentially absorbing impact energy during a vehicle collision through its own plastic deformation (such as compression and buckling), reducing the force directly transmitted to the columns and foundation. The collision force is transmitted to the energy-absorbing box and columns through the baffles. The deformation buffer of the energy-absorbing box and the combined force of the double baffles disperse the concentrated impact force into multiple points of force, reducing the load at the column connection points. Attached Figure Description

[0014] Figure 1 This is an isometric view of a guardrail according to one embodiment of this utility model; Figure 2 This is one embodiment of the present invention. Figure 1 Axonometric view at point I in the diagram; Figure 3 This is a cross-sectional structural diagram of a bolt according to one embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of a bolt according to one embodiment of the present invention.

[0015] The reference numerals in the attached drawings are: 1-baffle, 2-energy-absorbing box, 21-through hole, 31-main column, 32-base, 41-bolt head, 42-screw, 51-groove, 52-countersunk hole, 53-gap. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of this utility model, not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0018] Traditional guardrail structures typically employ a combination of panels and posts, relying primarily on the plastic bending deformation of the panels and posts under immense impact force to absorb vehicle collision energy. However, these traditional guardrail structures often exhibit significant limitations when encountering heavy vehicles or collisions at unfavorable angles. The connection between the panels and posts is highly susceptible to failure, leading to the posts being pulled out of their foundations or the guardrail system undergoing extensive bending deformation. This structural failure instantly renders the guardrail ineffective in stopping or guiding out-of-control vehicles.

[0019] like Figures 1-4 As shown, this utility model provides a guardrail, which includes a baffle 1, an energy-absorbing box 2, and multiple posts arranged in a left-right direction. The posts are fixedly connected to the ground. Two baffles 1 are provided, and the length of both baffles 1 extends in the left-right direction. The two baffles 1 are arranged at intervals in the front-back direction. All the posts are located between two adjacent baffles 1, and the two baffles 1 are fixedly connected to the posts respectively. Multiple energy-absorbing boxes 2 are provided, and the energy-absorbing boxes 2 are arranged between adjacent posts. The energy-absorbing boxes 2 are connected to the baffles 1.

[0020] By employing a structural design with double baffles 1, multiple columns, and energy-absorbing boxes 2, the energy absorption path and force dispersion mechanism are optimized. Two baffles 1, spaced apart front and rear, are fixedly connected by columns to form a multi-layered structure, improving overall structural stability and avoiding the tendency of traditional single baffles 1 to bend easily. The energy-absorbing boxes 2 between adjacent columns serve as the core energy-absorbing element. During a vehicle collision, they preferentially absorb impact energy through their own plastic deformation (such as compression and buckling), reducing the force directly transmitted to the columns and foundation. The collision force is transmitted through the baffles 1 to the energy-absorbing boxes 2 and columns. The deformation buffering of the energy-absorbing boxes 2 and the combined force of the double baffles 1 disperse the concentrated impact force into multiple points of stress, reducing the load at the column connections.

[0021] In one embodiment, the baffle 1 is a corrugated plate, with all the waveforms of the corrugated plate arranged vertically, and the front and rear baffles 1 are mirror images of each other. Since all the waveforms of the corrugated plate are arranged vertically, when a vehicle collides laterally, the impact force acts horizontally on the surface of the corrugated plate. This impact force causes localized compression deformation of the waveforms, which can be dispersed to a larger area through the slippage effect of the waveforms, thus providing a buffering effect.

[0022] The corrugated plate has a vertically arranged waveform, meaning that the crests and troughs alternate vertically (a cycle of "crest, trough, crest" from top to bottom), forming a cross-sectional shape similar to a "vertical corrugated steel sheet." The front and rear baffles 1 are mirror images of each other, meaning that the crest position of the front baffle 1 corresponds to the trough position of the rear baffle 1, forming a symmetrical structure with "complementary concave and convex" features. When the front side of the vehicle collides with the guardrail, the lateral impact force acts on the corrugated structure of the front baffle 1, triggering vertical tensile and compressive deformation. The crest area at the point of impact is compressed inward, while the adjacent trough area is stretched outward due to the continuity of the material, forming a "vertical waveform extension."

[0023] In one embodiment, the front and rear sides of the energy-absorbing box 2 are concave and convex, matching the corrugated plate. The front and rear sides of the energy-absorbing box 2 are designed with concave and convex contours complementary to the corrugated plate, that is, the protrusions on the sides of the energy-absorbing box 2 correspond to the troughs of the corrugated plate, and the depressions correspond to the crests. Since the waveform of the corrugated plate is arranged vertically, the concave and convex structure of the energy-absorbing box 2 also extends vertically synchronously, fitting into each crest / trough of the corrugated plate to achieve surface contact positioning.

[0024] During installation, before the two baffles 1 are finally locked in place by the posts, the energy-absorbing box 2 can be inserted between the front and rear baffles 1 along the length of the guardrail (left and right direction). After the baffles 1 are rigidly connected to the posts, the front and rear baffles 1 form an axial clamping force on the energy-absorbing box 2 (perpendicular to the side of the energy-absorbing box 2), further enhancing the stability of the concave-convex fit. At this time, the energy-absorbing box 2 is completely "clamped" in the frame formed by the baffles 1 and the posts, without the need for additional screws or glue. Of course, screws or glue can be used for structural stability.

[0025] In one embodiment, the energy-absorbing box 2 has multiple through holes 21 extending through it in the left-right direction. This structure is simple and easy to install. With the through holes 21 provided, the energy-absorbing box 2 can collapse at the through holes 21 when it is subjected to a collision.

[0026] In one embodiment, the through holes 21 are hexagonal. Optionally, the through holes 21 are evenly distributed on the left and right end faces of the energy-absorbing box 2, so that all the through holes 21 form a honeycomb structure.

[0027] When the through holes 21 are evenly distributed in a honeycomb array, a continuous grid structure can be formed inside the energy-absorbing box 2. Each hexagonal through hole 21 is surrounded by six adjacent hexagonal through holes 21. The solid part between the through holes 21 (hereinafter referred to as the "cell wall") is of equal width and uniform thickness, forming a periodic repeating unit of "through hole 21, cell wall, through hole 21". The through holes 21 provide a "buffer volume" for the deformation of the cell wall. When the collision force is transmitted to the energy-absorbing box 2, the hexagonal through holes 21 are first compressed (volume decreases), forcing the cell wall to fold inward into the through holes 21, and dissipating the collision energy through plastic deformation work (cell wall bending, stretching and material tearing).

[0028] In one embodiment, the guardrail further includes bolts. The post has a first positioning hole and a second positioning hole. The bolt passes through the first and second positioning holes to lock the post and the baffle 1 together. The first and second positioning holes on the post are arranged vertically and correspond to preset mounting holes on the baffle 1, forming a rigid connection structure with double-hole positioning.

[0029] In one embodiment, the bolt includes a bolt head 41 and a threaded rod 42. A gap 53 is provided between the first positioning hole and the second positioning hole. A groove 51 is provided on the outer wall of the threaded rod 42, and the groove 51 is located at the gap 53. The groove 51 and the gap 53 between the threaded rod 42 and the first and second positioning holes constitute a mechanical safety mechanism. The cross-sectional area of ​​the threaded rod 42 at the groove 51 is relatively small, forming a weak mechanical area. When the lateral force generated by a vehicle collision exceeds the design threshold, the stress preferentially concentrates at the groove 51, causing the threaded rod 42 to undergo plastic fracture along the groove 51.

[0030] In one embodiment, the bolt includes a bolt head 41 and a screw 42. The bolt head 41 has a countersunk hole 52 that extends into the screw 42. A gap 53 is provided between the first positioning hole and the second positioning hole, and the countersunk hole 52 extends to the gap 53.

[0031] The countersunk hole 52 extends axially into the interior of the screw 42 and terminates in the gap 53 region between the first positioning hole and the second positioning hole. By weakening the local cross-section of the screw 42 through the countersunk hole 52, a precise mechanical weak zone is constructed to achieve controllable fracture under overload.

[0032] In practical use, the connection between the front baffle 1 (the vehicle collision surface) and the pillar is secured using bolts with the groove 51 and / or countersunk hole 52 described above. The rear baffle 1 (facing away from the vehicle collision surface) can be secured to the pillar using conventional bolts (without the groove 51 or countersunk hole 52). This allows the break point at the connection between the bolts of the front baffle 1 and the pillar to be controlled at the groove 51 or countersunk hole 52, ensuring that the front baffle 1 and the energy-absorbing box can fully absorb the energy of the collision.

[0033] In one embodiment, the column includes a column body 31 and a base. The base is fixed to the ground by screws, and the column body 31 is fixed to the base. This structure is simple and easy to install, and it strengthens the connection between the column and the ground.

[0034] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A guardrail, characterized in that, It includes baffles (1), energy-absorbing boxes (2) and multiple columns arranged in the left and right directions. The columns are used to be fixedly connected to the ground. Two baffles (1) are provided, and the length of the two baffles (1) extends in the left and right directions. The two baffles (1) are arranged at intervals in the front and back directions. All the columns are located between two adjacent baffles (1). The two baffles (1) are fixedly connected to the columns respectively. Multiple energy-absorbing boxes (2) are provided. The energy-absorbing boxes (2) are located between adjacent columns. The energy-absorbing boxes (2) are connected to the baffles (1).

2. The guardrail according to claim 1, characterized in that, The baffle (1) is a waveform plate, and all the waveforms of the waveform plate are arranged vertically. The front and rear baffles (1) are mirror images of each other.

3. The guardrail according to claim 2, characterized in that, The front and rear sides of the energy-absorbing box (2) are matched with the corrugated plate.

4. The guardrail according to claim 3, characterized in that, The energy-absorbing box (2) has multiple through holes (21) that extend through the energy-absorbing box (2) in the left-right direction.

5. The guardrail according to claim 4, characterized in that, The through hole (21) is hexagonal.

6. The guardrail according to claim 1, characterized in that, The guardrail also includes bolts. The post has a first positioning hole and a second positioning hole. The bolt passes through the first positioning hole and the second positioning hole to lock the post and the baffle (1).

7. The guardrail according to claim 6, characterized in that, The bolt includes a bolt head (41) and a screw (42). A gap (53) is provided between the first positioning hole and the second positioning hole. A groove (51) is provided on the outer wall of the screw (42). The groove (51) is located at the gap (53).

8. The guardrail according to claim 6 or 7, characterized in that, The bolt includes a bolt head (41) and a screw (42). The bolt head (41) has a countersunk hole (52) that extends into the screw (42). A gap (53) is provided between the first positioning hole and the second positioning hole, and the countersunk hole (52) extends to the gap (53).

9. The guardrail according to claim 1, characterized in that, The column includes a column body (31) and a base. The base is fixed to the ground by screws, and the column body (31) is fixed to the base.

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