Guardrail for relieving impact and relieving method thereof

Abstract

The invention discloses an impact-relieving guardrail and a relieving method thereof, and relates to the technical field of guardrails, the impact-relieving guardrail comprises stand columns, the stand columns are fixed on the ground, transverse plates are inserted into the outer side walls of the stand columns, the transverse plates of the adjacent stand columns are rotationally connected, and the two rotationally connected transverse plates are arranged at an obtuse angle; the air cylinder is fixedly connected into the stand column, the piston is installed in the air cylinder in a sliding mode, one end of the pull rope is fixedly connected to one end of the transverse plate, the other end of the pull rope is installed in the stand column in a sliding mode, and the other end of the pull rope stretches into the air cylinder and is fixedly connected to the upper end of the piston. Through the buffering mechanism, the transverse plate forms a force for buffering the vehicle, the impact of the vehicle is relieved, and the problems that after an existing guardrail is impacted by the vehicle, the guardrail directly and rigidly makes contact with the vehicle, a vehicle body of the vehicle is seriously deformed and damaged, and the service life of the vehicle is prolonged are solved. And high-strength impact force and inertia generated after collision can cause injury to internal passengers.

Description

Technical Field

[0001] The present invention relates to the technical field related to guardrails, and in particular to a guardrail for alleviating impact and a method for alleviating impact. Background Art

[0002] Highway guardrails are an extremely critical component of highway safety facilities, designed to minimize damage in the event of an accident and prevent vehicles from deviating from the road or entering the opposite lane. Common highway guardrails include steel guardrails, cable net guardrails or concrete guardrails. Guardrails are mostly composed of pillars and panels (crossbars or mesh), refer to patent publication number: CN109024385B for a highway safety guardrail. Guardrails prevent vehicles from deviating from the road through physical isolation, especially on highways, mountain roads or bridges. In the event of a collision, the guardrail can also absorb part of the collision energy and reduce the severity of the accident by changing the collision angle of the vehicle. The presence of guardrails also plays a significant warning role, reminding drivers of the direction and boundaries of the road.

[0003] Guardrails are usually installed on both sides of the road and in the road divider, especially around turns, ramp entrances and complex intersections. The height and length of the guardrails are adjusted according to the road type, traffic flow and geographical location to meet safety standards. In order to enhance visibility and safety at night, guardrails are often equipped with reflective signs, that is, the color of the guardrail is changed by painting or pasting. Common colors include pure green, pure white, red and white, blue and white, black and gold, etc. The color selection of the guardrail usually takes into account environmental factors and regional characteristics, which can increase the aesthetics while providing warnings.

[0004] However, when the existing guardrail is hit by a vehicle, the guardrail directly and rigidly contacts the vehicle, causing serious deformation and damage to the vehicle body. The high impact force and inertia generated after the collision may also injure the occupants inside. After the vehicle tilts and hits the guardrail, the elastic force generated by the deformation of the material of the vehicle body and the guardrail and the deviation of the vehicle tires may cause the vehicle body to rush into the road again, resulting in a secondary accident. In order to solve the above-mentioned problems, a guardrail for alleviating impact and a method for alleviating impact are now provided. Summary of the invention

[0005] The purpose of the present invention is to provide an impact-mitigating guardrail and an impact-mitigating method thereof, so as to solve the problem raised in the above background technology that after the existing guardrail is hit by a vehicle, the guardrail directly and hard contacts the vehicle, causing serious deformation and damage to the vehicle body, and the high impact force and inertia generated after the collision may also cause injuries to the occupants inside.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a guardrail for alleviating impact, comprising an upright post, wherein a plurality of upright posts are provided, and the lower end of the upright post is fixed to the ground, a cross plate, one end of the cross plate is fixedly inserted into the outer wall of the upright post, one end of the cross plate of adjacent upright posts is rotatably connected, the two rotatably connected cross plates are arranged at an obtuse angle, and the angle is directed toward the road, and a buffer mechanism, the buffer mechanism comprises a pull rope, a piston and a cylinder, the cylinder is fixedly connected to the interior of the upright post, the piston is slidably installed in the cylinder, one end of the pull rope is fixedly connected to one end of the cross plate, the other end of the pull rope is slidably installed in the upright post, and the other end of the pull rope extends into the cylinder and is fixedly connected to the upper end of the piston, the cross plate is separated from the upright post by a vehicle impact, the pull rope is used to drive the piston to move upward, the air volume below the piston in the cylinder increases and generates downward pressure on the piston, and the pressure forms a buffering force on the vehicle through the cross plate.

[0007] In a further embodiment, the outer side wall of the cylinder is fixedly connected with a reinforcing rib for reinforcing the structural strength of the cylinder. The structural strength of the cylinder is increased by the reinforcing rib.

[0008] In a further embodiment, a sealed space is formed between the column and the cylinder to protect the cylinder.

[0009] In a further embodiment, a coil spring for resetting the horizontal plate is installed inside the upright column, and one end of the coil spring is fixedly connected to one end of the horizontal plate. The coil spring applies elastic force to the horizontal plate.

[0010] In a further embodiment, the lower end of the column is connected to a base through a screw rod, the base is buried in the base, the base is set to a concrete material, and the base is buried in the ground. The column is supported by the base.

[0011] In a further embodiment, cross bars are fixedly connected to both sides of the base, and inner threaded tubes for adjusting the distance between adjacent cross bars are threadedly sleeved between adjacent cross bars. The distance between the fixed bases is adjusted by the inner threaded tubes.

[0012] In a further embodiment, a baffle is provided at the rotational connection of the two horizontal plates, and sockets are provided on both sides of the end surface of the baffle, and the two horizontal plates are respectively inserted into the sockets on both sides of the baffle. The rotational connection of the two horizontal plates is blocked by the horizontal plate.

[0013] In a further embodiment, a plug is provided at the rotational connection of the two horizontal plates, the plug is plugged into the rotational connection of the two horizontal plates, convex plates are connected to the upper and lower sides of the middle of the end surface of the baffle, the two convex plates of the baffle are sleeved at the upper and lower ends of the plug, a screw is plugged into the upper end of the plug, and the lower end of the screw extends from the lower end of the plug, and a nut is threadedly connected to the extended part of the screw. The two horizontal plates are rotationally connected through the plug.

[0014] Preferably, the mitigation method of the guardrail for mitigating impact comprises the following steps:

[0015] A1. After the vehicle hits the cross board, the cross board set at an obtuse angle will initially block the vehicle and quickly reduce the impact force generated by the vehicle. Then the cross board will deform and flip outward from the road. At the same time, the cross board will separate from the column. The cross board will apply an upward pulling force to the piston through the pull rope, causing the piston to move upward in the cylinder. As the piston moves, the volume of air below the piston in the cylinder increases, forming a downward pressure on the piston. This pressure forms a buffering force on the vehicle through the pull rope and the cross board.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention relates to a guardrail for alleviating impact and a method for alleviating impact. After a vehicle hits a cross plate, a buffer mechanism is used to enable the cross plate to form a force to buffer the vehicle, thereby alleviating the impact of the vehicle. This solves the problem that after the existing guardrail is hit by a vehicle, the guardrail directly and hard contacts the vehicle, causing serious deformation and damage to the vehicle body, and the high-intensity impact force and inertia generated after the collision may also cause injuries to the occupants inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall main structure of the guardrail according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall rear view structure of the guardrail according to an embodiment of the present invention;

[0020] Figure 3 It is an overall top view of the guardrail according to an embodiment of the present invention;

[0021] Figure 4 A cross-sectional view of a column according to an embodiment of the present invention;

[0022] Figure 5 A cross-sectional view of a cylinder according to an embodiment of the present invention;

[0023] Figure 6 It is an exploded view of the horizontal plate of an embodiment of the present invention.

[0024] In the figure: 1. column; 2. cross plate; 21. coil spring; 22. baffle; 3. buffer mechanism; 31. pull rope; 32. piston; 33. cylinder; 331. reinforcing rib; 4. base; 5. pedestal; 51. cross bar; 52. internal threaded pipe; 6. insert pipe; 61. screw; 62. nut; A. impact direction. DETAILED DESCRIPTION

[0025] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-6 The present embodiment provides a guardrail for alleviating impact and a method for alleviating impact, including a column 1, a highway safety guardrail with reference to patent publication number: CN109024385B, a plurality of columns 1 are arranged, fixed on both sides of the highway or at the road dividing position, and the spacing between adjacent columns 1 is set at 2 to 4 meters according to the requirements.

[0027] like Figure 1 and Figure 2 As shown, the lower end of the column 1 is connected to the base 5, and the lower end of the column 1 and the upper end of the base 5 are both connected to flanges, and the flanges of the column 1 and the base 5 are connected by multiple threaded rods, so that the column 1 and the base 5 form a whole. The installation process of the column 1 is to first dig a foundation pit on the ground, place the base 5 in the foundation pit, and stand up the column 1 and the base 5. By pouring cement into the foundation pit, the base 4 can be formed after the cement solidifies. The base 4 wraps the base 5, and only the flange above the base 5 is exposed. The base 4 can be designed and adjusted according to different terrain and soil conditions, such as increasing the depth and width of the base on soft soil or sand to provide additional support.

[0028] The function of the base 4 is to provide a solid foundation for the whole formed by the column 1 and the base 5. In the event of a collision, the base 4 can resist the lateral and vertical forces from the vehicle collision, help disperse and absorb the impact energy, and ensure that the whole formed by the column 1 and the base 5 will not easily fall or shift when impacted. The base 5 is made of steel, and the base 4 wraps the base 5 to prevent the lower end of the base 5 from directly contacting the moisture, salt and some acidic chemicals in the soil, reducing the risk of corrosion or rust of the base 5. This can significantly extend the service life of the guardrail and its components.

[0029] The base 5 is cylindrical in shape. After the base 4 solidifies and wraps the bottom of the base 5, the adhesion of the base 4 to the base 5 and the friction between the two can exert vertical pressure on the lower side wall of the base 5. However, after the column 1 is subjected to sufficient lateral force or impact force, the base 5 may still be partially or completely pulled out of the base 4. In order to prevent the base 5 from being separated from the base 4 after the column 1 is impacted, Figure 1 and Figure 2As shown, two crossbars 51 are rotatably mounted on the outer wall of the base 5. The crossbar 51 includes a rod body and a ring, the rod body is fixedly connected to the outer wall of the ring, the outer wall of the base 5 is provided with a ring groove, and the ring of the crossbar 51 is rotatably sleeved in the ring groove of the base 5. The crossbar 51 increases the friction between the base 5 and the base 4 as a whole by increasing the contact area between the crossbar 51 and the base 4. In addition, the crossbar 51 is set as a metal screw, and the existence of the crossbar 51 itself increases the tensile strength, which means that the base 5 is more difficult to be directly separated from the base 4. The existence of the crossbar 51 forms a mechanical lock between the base 5 and the base 4. When the base 4 solidifies and tightly wraps the crossbar 51, any force attempting to pull the base 5 out of the base 4 must overcome the additional mechanical resistance provided by the crossbar 51. This mechanical interlocking effect significantly improves the overall stability and pull-out resistance of the base 5. When the column 1 is subjected to lateral forces (such as wind force or collision force), the crossbar 51 on the base 5 helps to disperse these forces to a larger area of ​​the base 4. This reduces the pressure directly acting on the contact point between the base 5 and the base 4, reducing the risk of damage or separation due to concentrated stress. In general, during the process of cement curing of the base 4, the bond between the crossbar 51 and the cement also improves the durability of the entire structure of the column 1 and the base 5. Even under extreme weather conditions or repeated loads, the crossbar 51 helps maintain the stability and long-term performance of the column 1 and the base 5 as a whole.

[0030] When the base 5 is placed in the foundation pit, after the cement is poured into the foundation pit, the flow and weight of the cement may cause the base 5 to move or tilt. In order to determine and maintain the spacing between adjacent bases 5 and prevent the base 5 from moving before the cement solidifies, the crossbars 51 on the adjacent bases 5 are threadedly connected with the internal threaded pipe 52. During installation, the crossbars 51 on the adjacent bases 5 are rotated so that the screws of the two adjacent crossbars 51 of the two bases 5 are distributed in the same straight line, and the internal threaded pipe 52 is placed between the two crossbars 51, close to the two crossbars 51, and the rod of the crossbar 51 can be screwed into the pipe body of the internal threaded pipe 52 by rotating the internal threaded pipe 52. After the spacing between the two bases 5 reaches the required length, stop rotating the internal threaded pipe 52, and the spacing between the two bases 5 can be determined and maintained. Through the connection between the internal threaded pipe 52 and the crossbar 51, all the bases 5 placed in the foundation pit form a whole, and through the increase of mass, the stability of the base 5 can be increased, and the flow and weight of the cement can be prevented from causing the base 5 to move or tilt.

[0031] like Figure 1 and Figure 2 As shown, slots are provided on both sides of the column 1, and a horizontal plate 2 is inserted into the slot, and one end of two mutually adjacent horizontal plates 2 on adjacent columns 1 is rotatably connected. Figure 3As shown, the two rotating horizontal plates 2 form an obtuse angle, and the outer angle of the obtuse angle faces the direction of the road. After the vehicle hits any of the two horizontal plates 2 connected at an obtuse angle, the force applied to the horizontal plate 2 will be dispersed along this edge to the other horizontal plate 2 and the two upright posts 1. The upright posts 1 apply a supporting force to the horizontal plate 2, thereby improving the structural strength of the horizontal plate 2. After the vehicle hits the horizontal plate 2, the two horizontal plates 2 connected at an obtuse angle provide a preliminary barrier to the vehicle, reduce the speed of the vehicle or stop the vehicle, and prevent the vehicle from passing through the guardrail, thereby effectively controlling the range of motion of the vehicle, maintaining its safe position on the road, and avoiding more serious accidents.

[0032] The cross plate 2 is made of steel plate. After the vehicle hits the cross plate 2, the cross plate 2 will bend and deform. This deformation process absorbs part of the impact energy, reduces the intensity of energy transferred to the vehicle and passengers, and reduces the damage to the vehicle and passengers caused by the accident. However, after the vehicle hits the cross plate 2 at a high speed, the blunt outer corner faces the road, such as Figure 3 In the impact direction A shown, although the horizontal plate 2 connected at an obtuse angle and the strength of the horizontal plate 2 itself can absorb and disperse most of the impact energy, the excess residual energy will still damage the guardrail. In order to further alleviate the impact of the vehicle and protect the guardrail, a buffer mechanism 3 is installed in the column 1.

[0033] The buffer mechanism 3 includes a pull rope 31, a piston 32 and a cylinder 33, wherein Figure 4 As shown, a chamber is provided inside the column 1, and a cylinder 33 is fixedly installed in the chamber. An opening is provided at the upper end of the cylinder 33, and the upper end of the cylinder 33 is fixedly connected to the top surface of the chamber of the column 1. The space inside the chamber of the column 1 and the outer wall of the cylinder 33 are a closed space. When the column 1 is impacted and deformed, the air inside the column 1 will be compressed. The compressed air is elastic, and will absorb and disperse part of the impact energy during the compression process of the air, and can also reduce the load-bearing burden of the column 1 material itself.

[0034] like Figure 5 As shown, the piston 32 is slidably installed in the cylinder 33, and the space below the piston 32 in the cylinder 33 contains air. One end of the pull rope 31 is fixedly connected to the upper end of the piston 32, and the other end of the pull rope 31 passes through the interior of the column 1 and extends from the outer wall of the column 1. The end of the pull rope 31 extending from the column 1 is fixedly connected to one end of the cross plate 2. After the vehicle hits the cross plate 2, after the cross plate 2 initially cushions the vehicle, the cross plate 2 is bent and deformed by the residual impact force. Subsequently, the cross plate 2 separates from the column 1. The cross plate 2 separated from the column 1 will pull the piston 32 in the cylinder 33 through the pull rope 31, so that the piston 32 slides upward in the cylinder 33. At this time, the volume of air below the piston 32 in the cylinder 33 will increase. After the volume of air increases, the air will exert downward pressure on the piston 32 due to its elastic recovery ability.

[0035] When the piston 32 in the cylinder 33 slides upward, the volume of the sealed air below the piston 32 increases, and the gas pressure decreases accordingly. According to the physical behavior of the gas and Boyle's law:

[0036] PV = k

[0037] Where P is pressure, V is volume, and K is a constant. The force exerted by the air on the piston 32 in this case can be analyzed, that is, the larger the volume of air under the piston 32, the greater the pressure on the piston 32.

[0038] The relationship between the pressure and volume of the air below the piston 32 can be expressed by the following equation:

[0039] P1V1=P2V2

[0040] Among them, P1 and V1 are the pressure and volume of the air under the piston 32 before the piston 32 starts to move, and P2 and V2 are the pressure and volume of the air under the piston 32 after the piston 32 moves. According to the formula, the new pressure P2 after the piston 32 moves can be determined. Since V2>V1 (volume increases), we can infer that P2 <P1。

[0041] Therefore, when the piston 32 moves upward and causes the volume of the sealed air below it to increase, due to the decrease in gas pressure, the force acting on the piston 32 is mainly a downward pressure, which attempts to push the piston 32 back to its original position or further downward. This pressure is applied to the cross plate 2 through the pull rope 31, forming a buffering force for the impacting vehicle, thereby preventing serious damage to the vehicle or guardrail.

[0042] When the piston 32 moves in the cylinder 33, in order to ensure the smooth movement of the piston 32, the structural integrity of the cylinder 33 needs to be maintained. However, after the vehicle hits the pillar 1, the deformed pillar 1 will produce an extrusion force on the cylinder 33. In order to ensure the structural integrity of the cylinder 33 and prevent the cylinder 33 from deforming (depression or distortion), the outer wall of the cylinder 33 is fixedly connected with a reinforcing rib 331. Among them, the reinforcing rib 331 is set in multiple numbers, and the multiple reinforcing ribs 331 are evenly arranged in a circular array with the cylinder 33 as the center. The reinforcing ribs 331 evenly distributed on the cylinder 33 help to evenly disperse the external force to the entire structure of the cylinder 33, reduce stress concentration, and prevent local areas from being subjected to excessive stress and causing damage to the cylinder 33. The reinforcing ribs 331 can increase the thickness and rigidity of the outer wall of the cylinder 33, improve the bending, torsion and compression resistance of the cylinder 33, and enable it to withstand greater external forces without deformation or rupture. Moreover, compared with simply increasing the wall thickness, the strength can be improved without significantly increasing the weight of the cylinder 33 by providing the reinforcing ribs 331. Long-term use of the cylinder 33 may lead to performance degradation due to fatigue or corrosion, and the reinforcing ribs 331 can delay the accumulation of fatigue damage and the progression of corrosion of the cylinder 33, thereby improving the durability and service life of the cylinder 33.

[0043] Since the two horizontal plates 2 are arranged at an obtuse angle, when the vehicle hits the corner tip of the obtuse angle, when the vehicle impact force is the same, the smaller the action surface, the greater the pressure. Therefore, the angle tip of the two horizontal plates 2 will exert a relatively concentrated impact force on the vehicle body, and this concentrated impact force is likely to cause serious dents, perforations or cracks in the material of the vehicle near the impact point. The shape and angle of the corner tip may generate shear force when it contacts the vehicle, especially when the movement direction of the vehicle is not completely perpendicular to the direction of the corner tip of the two horizontal plates 2, the shear force can cause the surface material of the vehicle to be cut or peeled off, especially on metal or plastic parts. During the collision, the force of the corner tip on the vehicle will compress the material of the impact area of ​​the vehicle, and this compression force will deform the material and may cause permanent damage to the structure, such as bending or twisting of the body frame. When the vehicle hits the corner tip, not only direct pressure is generated, but also bending moment (torque) may be generated at the impact point. The bending moment force will increase the risk of distortion or fracture of the vehicle structural components, especially on the structure far from the impact force application point. Therefore, in order to prevent the vehicle from hitting the corner tip of the transverse plate 2 where the force is more concentrated, a baffle 22 is installed at the rotation connection between the two transverse plates 2.

[0044] The baffle 22 is an arc-shaped plate body, and sockets are respectively provided on both sides of the end surface of the baffle 22, and the two transverse plates 2 are respectively inserted into the two sockets of the baffle 22. The concave surface of the arc-shaped baffle 22 faces the rotation connection of the two transverse plates 2, and the convex surface faces the collision direction A. The baffle 22 shields the sharp corners of the two transverse plates 2 to prevent vehicle collision.

[0045] like Figure 6 As shown, one end of the two horizontal plates 2 is staggered, and the staggered parts of the two horizontal plates 2 are plugged with a plug 6, and the two ends of the plug 6 extend from the upper and lower ends of the staggered parts of the two horizontal plates 2, and the two horizontal plates 2 are rotatably connected through the plug 6. The baffle 22 is fixedly connected with convex plates on both sides of the upper and lower ends of the end surface of the rotation connection of the two horizontal plates 2, and the two convex plates are respectively rotatably sleeved on the protruding parts of the upper and lower ends of the plug 6, and the upper end of the plug 6 is plugged with a screw 61, and the lower end of the screw 61 extends from the lower end of the plug 6, and the protruding part of the lower end of the screw 61 is threadedly connected with a nut 62. Among them, the diameter of the nut 62 and the screw head diameter of the screw 61 are larger than the through hole of the convex plate, thereby limiting the convex plate to prevent the baffle 22 from separating from the two horizontal plates 2.

[0046] When the vehicle impacts the cross plate 2 and deforms the cross plate 2, the baffle 22 bends toward the concave surface of the baffle 22 as the cross plate 2 deforms. The baffle 22 is also made of steel metal. After the impact vehicle is separated from the cross plate 2, the cross plate 2 can recover through its own elastic force and the elastic force of the baffle 22. At the same time, the air in the cylinder 33 drives the piston 32 in the cylinder 33 to move downward and reset through its own elastic recovery ability and the weight of the piston 32. At this time, the pull rope 31 can drive the cross plate 2 to reset and insert it into the slot of the column 1.

[0047] Then, only through the elastic restoring force of the air and the self-weight of the piston 32, the reset speed and reset accuracy when one end of the cross plate 2 is inserted into the slot of the column 1 are poor. Therefore, in order to enable the cross plate 2 to quickly reset after the impact vehicle breaks away from the cross plate 2, one end of the cross plate 2 connected to the pull rope 31 is fixedly connected to a coil spring 21, and a ring hole is opened inside the column 1, and the coil spring 21 is installed in the ring hole, that is, the other end of the coil spring 21 is fixedly connected to the inner wall of the ring hole. After the cross plate 2 is hit and breaks away from the slot of the column 1, the elastic force of the coil spring 21 applies a pulling force to the cross plate 2 toward the slot of the column 1, thereby accelerating the reset of the cross plate 2.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A guardrail for alleviating impact, characterized in that: include: A column (1), wherein a plurality of columns (1) are provided, and the lower end of the column (1) is fixed to the ground; A transverse plate (2), one end of which is fixedly inserted into the outer wall of the column (1), one end of the transverse plate (2) adjacent to the column (1) is rotatably connected, and the two rotatably connected transverse plates (2) are arranged at an obtuse angle, and the angle is oriented toward the road; A buffer mechanism (3), the buffer mechanism (3) comprising a pull rope (31), a piston (32) and a cylinder (33), the cylinder (33) being fixedly connected to the interior of the column (1), the piston (32) being slidably mounted in the cylinder (33), one end of the pull rope (31) being fixedly connected to one end of the horizontal plate (2), the other end of the pull rope (31) being slidably mounted in the column (1), and the other end of the pull rope (31) extending into the cylinder (33) and fixedly connected to the upper end of the piston (32); The cross plate (2) is separated from the pillar (1) by the impact of the vehicle, and the pull rope (31) is used to drive the piston (32) to move upward. The air volume below the piston (32) in the cylinder (33) increases, exerting downward pressure on the piston (32), and the pressure forms a buffering force on the vehicle through the cross plate (2).

2. The impact mitigation guardrail according to claim 1, characterized in that: A reinforcing rib (331) for reinforcing the structural strength of the cylinder (33) is fixedly connected to the outer side wall of the cylinder (33).

3. The impact mitigation guardrail according to claim 2, characterized in that: A sealed space is formed between the column (1) and the cylinder (33).

4. The impact mitigation guardrail according to claim 3, characterized in that: A coil spring (21) for resetting the horizontal plate (2) is installed inside the upright column (1), and one end of the coil spring (21) is fixedly connected to one end of the horizontal plate (2).

5. The impact mitigation guardrail according to claim 4, characterized in that: The lower end of the column (1) is connected to a base (5) via a screw rod, and the base (5) is buried in a pedestal (4). The pedestal (4) is made of concrete and is buried on the ground.

6. The impact mitigation guardrail according to claim 5, characterized in that: Cross bars (51) are fixedly connected to both sides of the base (5), and internal threaded tubes (52) for adjusting the spacing between adjacent cross bars (51) are threadedly sleeved between adjacent cross bars (51).

7. The impact mitigation guardrail according to claim 4, characterized in that: A baffle (22) is provided at the rotational connection of the two transverse plates (2), and sockets are provided on both sides of the end surface of the baffle (22). The two transverse plates (2) are respectively plugged into the sockets on both sides of the baffle (22).

8. The impact mitigation guardrail according to claim 7, characterized in that: The rotational connection of the two transverse plates (2) is provided with an insert (6), the insert (6) is plugged into the rotational connection of the two transverse plates (2), the upper and lower sides of the middle of the end surface of the baffle (22) are connected with convex plates, the two convex plates of the baffle (22) are sleeved on the upper and lower ends of the insert (6), the upper end of the insert (6) is plugged with a screw rod (61), and the lower end of the screw rod (61) protrudes from the lower end of the insert (6), and the protruding part of the screw rod (61) is threadedly connected with a nut (62).

9. A method for alleviating an impact of a guardrail, using the impact-alleviating guardrail according to any one of claims 1 to 8, characterized in that: The steps include: A1. After the vehicle hits the transverse plate (2), the transverse plate (2) arranged at an obtuse angle will initially block the vehicle, quickly reducing the impact force generated by the vehicle. Then, the transverse plate (2) will deform and flip outward from the road. At the same time, the transverse plate (2) will separate from the column (1). The transverse plate (2) applies an upward pulling force to the piston (32) through the pull rope (31), so that the piston (32) moves upward in the cylinder (33). As the piston (32) moves, the volume of air below the piston (32) in the cylinder (33) increases, forming a downward pressure on the piston (32). This pressure forms a buffering force on the vehicle through the pull rope (31) and the transverse plate (2).

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