Road protective fence

Abstract

The invention relates to the technical field of highway facilities, in particular to a road protective fence which comprises a main line section protective fence, a main line section protective fence and a main line section protective fence, the curve section guardrail is arranged at the level crossing; the transition section guardrail is connected with the main line section guardrail and the curve section guardrail; the height of the highest point of the main line section guardrail is higher than that of the highest point of the curve section guardrail, the height of the highest point of the curve section guardrail is configured to be lower than the driving sight of a driver, and the height of the transition section guardrail is gradually reduced in the direction from the main line section guardrail to the curve section guardrail. The road protective fence at the level crossing is divided into multiple sections including the main line section protective fence, the curve section protective fence and the transition section protective fence, the height of the curve section protective fence is reduced, and the main line section protective fence at the straight line section of the road and the curve section protective fence at the level crossing are connected through the transition section protective fence with the gradually-changed height. And collaborative optimization of safety protection and driving visibility of the level crossing is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of highway settings, and in particular to a road guardrail. Background Art

[0002] With the acceleration of the urbanization process and the complexity of the urban-rural road network, the plane intersection, i.e., the flat intersection, a special section formed by the intersection of roads of different grades, has become a high-incidence area of traffic accidents. According to incomplete statistics, the proportion of traffic accidents at flat intersections in China in the past three years has reached 35%, and among them, the scratch and collision accidents caused by out-of-control vehicles ramming and line-of-sight obstruction account for more than 60% of the total. Although the current road traffic safety facilities standard (GB 5768-2009) compulsorily requires the installation of protection devices at flat intersections, there are still significant defects in the existing technologies.

[0003] In the existing technologies, the traditional guardrail system generally has the problem of protection blind spots. Most of the existing guardrails use single-specification corrugated beam guardrail plates to extend along the straight line of the road, and no adaptive design is carried out for the special road conditions at flat intersections. Especially in the curved section, the straight guardrail cannot form an effective guide, resulting in out-of-control vehicles being prone to break through the guardrail and invade the oncoming lane. On the other hand, at flat intersections, too high guardrails will compress the driver's lateral visual field range.

[0004] Therefore, there is an urgent need for a road guardrail that can play a protective role at flat intersections without obstructing the driver's driving vision. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present invention provides a road guardrail, which uses multi-section guardrails with different heights to improve the protection safety of the road guardrail at flat intersections.

[0006] According to a first aspect of the present invention, there is provided a road guardrail, comprising: A main-line section guardrail provided on the straight section of the road; A curved-section guardrail provided at the flat intersection; A transition-section guardrail connecting the main-line section guardrail and the curved-section guardrail; Wherein, the highest point height of the main-line section guardrail is higher than the highest point height of the curved-section guardrail, the highest point height of the curved-section guardrail is configured to be lower than the driver's driving line of sight, and the transition-section guardrail is arranged with its height gradually decreasing from the main-line section guardrail to the curved-section guardrail.

[0007] In some embodiments of the present invention, the main-line section guardrail, the curved-section guardrail and the transition-section guardrail all include columns, connectors and guardrail plates. One end of each column is vertically installed on the ground, and the connector is installed at the other end of the column, and the connector is used to connect the column and the guardrail plate.

[0008] In some embodiments of the present invention, the guardrail plates in the main line section guardrail and the transition section guardrail are straight corrugated plates, and the guardrail plates in the bend section guardrail are arc-shaped corrugated plates.

[0009] In some embodiments of the present invention, in the main line section guardrail and the transition section guardrail, the columns are arranged on the side of the guardrail plate relatively far from the road, and one side of the connecting member is attached to the column and the other side is attached to the guardrail plate.

[0010] In some embodiments of the present invention, in the bend section guardrail, guardrail plates are arranged on both sides of the column relatively close to and / or far from the road.

[0011] In some embodiments of the present invention, the bend section guardrail forms a storage space, and a plurality of buffer units distributed along the direction of the guardrail plate are arranged in the storage space. Each buffer unit includes an outer sleeve and a plurality of inner sleeves.

[0012] In some embodiments of the present invention, the outer sleeve contacts the guardrail plates on both sides. There are three inner sleeves, and the three inner sleeves are arranged in a triangle. The inner sleeves are tangent to each other in pairs, and all three inner sleeves are tangent to the inner wall of the outer sleeve.

[0013] In some embodiments of the present invention, a filler is arranged in the inner sleeve.

[0014] In some embodiments of the present invention, the filler is a foam metal or a honeycomb structure material.

[0015] In some embodiments of the present invention, a plug cap is arranged at the end of the column far from the ground. The plug cap has a mounting hole for mounting a warning sign.

[0016] The beneficial effects of the present invention are as follows: By dividing the road guardrail at the intersection into multiple sections: the main line section guardrail, the bend section guardrail, and the transition section guardrail, the height of the bend section guardrail is reduced, and the main line section guardrail on the straight section of the road and the bend section guardrail at the intersection are connected by the transition section guardrail with a gradually changing height; compared with the prior art, the coordinated optimization of safety protection and driving visibility at the intersection is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the road guardrail in the embodiment of the present invention; Figure 2 It is a front view of the road guardrail in the embodiment of the present invention; Figure 3 It is an exploded view of the main line section guardrail in the embodiment of the present invention; Figure 4 It is an exploded view of the curve section guardrail in the embodiment of the present invention; Figure 5 It is a top view of the curve section guardrail in the embodiment of the present invention; Figure 6 It is a layout schematic diagram of the buffer unit in the storage space in the embodiment of the present invention; Figure 7 It is a structural and force-bearing schematic diagram of the buffer unit in the embodiment of the present invention; Figure 8 It is an installation schematic diagram of the column plug cap in the embodiment of the present invention.

[0019] Explanation of reference numerals: 1, main line section guardrail; 2, curve section guardrail; 21, storage space; 22, buffer unit; 22a, outer sleeve; 22b, inner sleeve; 22b1, filler; 3, transition section guardrail; 4, column; 41, plug cap; 42, mounting hole; 5, connecting piece; 6, guardrail plate. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] Such as Figures 1 to 8The road guardrail shown includes: a main-line section guardrail 1, a curve section guardrail 2, and a transition section guardrail 3. The main-line section guardrail 1 is arranged on the straight section of the road; the curve section guardrail 2 is arranged at the intersection; the transition section guardrail 3 connects the main-line section guardrail 1 and the curve section guardrail 2; wherein, the height of the highest point of the main-line section guardrail 1 is higher than the height of the highest point of the curve section guardrail 2, and the height of the highest point of the curve section guardrail 2 is configured to be lower than the driver's driving line of sight, and the height of the transition section guardrail 3 is gradually decreased from the main-line section guardrail 1 towards the curve section guardrail 2. As Figure 1 and Figure 2 shown, the main-line section guardrail 1 is arranged on the straight section of the road, and its height can be selected from 0.9 m to 1.2 m to provide good anti-collision ability. This section is used for the normal driving area of vehicles to prevent out-of-control vehicles from crossing the line or rushing out of the lane. The curve section guardrail 2 is arranged at the curve or intersection of the road, and its height can be selected from 0.5 m to 0.8 m, and its set height is limited to be lower than the line of sight height of the driver in the normal driving posture (generally about 1.2 m) to ensure that the driver can clearly observe the intersecting vehicles and pedestrians. The transition section guardrail 3 is arranged between the main-line section guardrail 1 and the curve section guardrail 2 to form a smooth transition, and its height is gradually decreased from the main-line section guardrail 1 towards the curve section guardrail 2. For example, within the length of the 1-3 m long transition section guardrail 3, the guardrail height is gradually decreased from 1 m to 0.7 m to ensure the continuity and coordination of the structure and vision. It should be understood here that the guardrail material can be selected from materials with high strength and weather resistance such as galvanized steel, stainless steel, and aluminum alloy, and reflective strips can also be combined to further improve the safety performance.

[0024] In the above embodiment, the present invention divides the road guardrail at the intersection into multiple sections: the main-line section guardrail 1, the curve section guardrail 2, and the transition section guardrail 3, reduces the height of the curve section guardrail 2, and connects the main-line section guardrail 1 on the straight section of the road and the curve section guardrail 2 at the intersection by the transition section guardrail 3 with gradually changing height; compared with the prior art, the coordinated optimization of the safety protection and driving visibility at the intersection is realized.

[0025] In the embodiment of the present invention, the specific structures of the main-line section guardrail 1, the curve section guardrail 2, and the transition section guardrail 3 are as Figure 3 and Figure 4As shown, the main line section guardrail 1, the curve section guardrail 2, and the transition section guardrail 3 all include columns 4, connectors 5, and guardrail plates 6. One end of the column 4 is vertically installed on the ground, and the connector 5 is installed at the other end of the column 4. The connector 5 is used to connect the column 4 and the guardrail plate 6. Each section of the guardrail is provided with multiple columns 4. The column 4 is a longitudinally arranged load-bearing structure, and one end of it is vertically installed on the ground and can be fixed to the road foundation through embedded parts or expansion bolts to ensure the stability and impact resistance of the overall structure. The connector 5 is installed at the upper end or side end of the column 4 and serves as the connection structure between the column 4 and the guardrail plate 6. The connector 5 can be a screwed, clamped, or plugged structure, which is convenient for the assembly and replacement of the guardrail plate 6. The design of the connector 5 not only provides a firm fixing ability but also allows for an angle or height difference between the guardrail plates 6 of different heights and the column 4 to adapt to the gradual change structure requirements of the transition section. The guardrail plate 6 is arranged horizontally and is used to connect adjacent columns 4 to form a continuous guardrail surface, and its height is required according to different road sections. In this embodiment, the segmented structural division enables the materials of each section to be transported and constructed by area, improving the on-site construction efficiency.

[0026] In the embodiment of the present invention, the guardrail plates 6 in the main line section guardrail 1 and the transition section guardrail 3 are straight corrugated plates, and the guardrail plates 6 in the curve section guardrail 2 are arc-shaped corrugated plates. As Figures 1 to 5 shown, the straight corrugated plate is a linear structure, and a two-wave or three-wave steel guardrail plate 6 can be selected. It has good impact resistance and continuity. Its structure is simple and convenient for processing and installation, and it can effectively guide and buffer the vehicles deviating from the lane. The arc-shaped corrugated plate is arranged in an arc shape along the horizontal direction and is suitable for curve section positions such as road curves and intersections. This structure can better fit the curved shape of the road, achieve coordinated matching with the geometric shape of the road surface, and avoid installation gaps, corner dead ends, or sudden structures caused by the straight-line rigidity of the plate. In this embodiment, the arc-shaped corrugated plate combines with the guardrail structure of a lower height in the curve section to form a flexible and continuous visual guiding curve, which helps the driver accurately identify the road direction at night or in bad weather and improves driving safety.

[0027] In the embodiment of the present invention, in the main line section guardrail 1 and the transition section guardrail 3, the column 4 is arranged on the side relatively far from the road of the guardrail plate 6, and one side of the connector 5 is attached to the column 4 and the other side is attached to the guardrail plate 6. As Figures 1 to 3As shown, the guardrail plate 6 is on the roadside of the road, facing the vehicle driving direction, forming the main protection and guiding surface. The column 4 is located on the side away from the lane behind the guardrail plate 6 and is fixedly perpendicular to the ground. One side of the connecting piece 5 is fixedly attached to the column 4, and the other side is attached to and connected to the guardrail plate 6. It should be noted here that the connection methods between the connecting piece 5 and the column 4 and the guardrail plate 6 can be bolt connections. The connecting piece 5 is respectively fixed to the column 4 and the guardrail plate 6 through the cooperation of bolts and nuts. Welding connections, snap connections, etc. can also be selected. The specific connection method can be diversely selected according to actual needs. In this embodiment, since the column 4 is arranged at the rear side, no protrusion is formed in front of the guardrail plate 6, avoiding the risk of bumping into passing pedestrians or non-motor vehicles and improving the overall safety of the road.

[0028] In the embodiment of the present invention, in the guardrail 2 of the curved section, guardrail plates 6 are provided on both sides of the column 4 relatively close to and / or away from the road. As Figure 4 and Figure 5 shown, guardrail plates 6 are provided on both sides of the column 4 in the guardrail 2 of the curved section, that is, on the side relatively close to the road and the side away from the road. The column 4 is located in the middle of the structure of the guardrail 2 of the curved section and serves as a load-bearing support member. The guardrail plate 6 on the side close to the lane is used to protect against the deviation of vehicles in the driving direction, and the guardrail plate 6 on the side away from the lane can be used as a protection for oncoming vehicles. The bilateral guardrail plates 6 can be respectively fixed to the same column 4 through the corresponding connecting pieces 5, or can be respectively connected to the two wings of a double-limb column 4 (such as a T-shaped column 4). In this embodiment, the guardrail plates 6 on both sides jointly share the collision energy, enhancing the force balance and stability of the column 4 and improving the anti-impact ability of the entire section of the guardrail when the vehicle has a side collision or rubbing. If the curved section is arranged between two-way lanes, this structure can provide protection for vehicles in both two-way lanes at the same time and can also be applied as a compact central isolation structure, reducing the width requirement of the isolation belt.

[0029] In the embodiment of the present invention, in order to improve the utilization rate, a storage space 21 is formed in the guardrail 2 of the curved section, and a plurality of buffer units 22 distributed along the direction of the guardrail plate 6 are arranged in the storage space 21. Each single buffer unit 22 includes an outer sleeve 22a and a plurality of inner sleeves 22b. As Figures 4 to 6As shown, the storage space 21 extends along the curve direction, and a plurality of buffer units 22 distributed along the road extension direction are arranged inside it. Each individual buffer unit 22 is an independent component. Each individual buffer unit 22 includes an outer sleeve 22a and a plurality of inner sleeves 22b. The outer sleeve 22a is an external fixing member of the buffer unit 22 and is installed inside the two guardrail plates 6 on both sides of the curve section guardrail 2. The plurality of inner sleeves 22b are coaxially arranged inside the outer sleeve 22a, forming a sleeve-type nested structure and can be compressed in the force direction. When a vehicle collides, the inner sleeves 22b absorb the impact energy to achieve the buffering effect. The curve is an area where accidents occur frequently. By arranging the buffer units 22, a greater displacement buffering stroke can be provided when a vehicle impacts, effectively absorbing the impact energy and reducing the risks of vehicle damage and human injury.

[0030] In an embodiment of the present invention, the buffer unit 22 is further optimized. The outer sleeve 22a contacts the two guardrail plates 6 on both sides. There are three inner sleeves 22b, and the three inner sleeves 22b are arranged in a triangle. The inner sleeves 22b are tangent to each other pairwise, and all three inner sleeves 22b are tangent to the inner wall of the outer sleeve 22a. As Figure 6 and Figure 7 shown, the outer wall of the outer sleeve 22a is in close contact with the two guardrail plates 6 of the curve section guardrail 2, playing a role of space limitation and support fixation, and ensuring the stable installation of the buffer unit 22 within the guardrail structure. The three inner sleeves 22b are arranged in an equilateral triangle layout, that is, the inner sleeves 22b are tangent to each other pairwise along the cross-section. At the same time, the outer edge of each inner sleeve 22b is also tangent to the inner wall of the outer sleeve 22a. The whole forms a tightly nested structure with multi-point contact and three-way support. When this structure is subjected to an impact load, specifically as Figure 7 shown, the impact force can be dispersed and transmitted in multiple directions. Among them, a single inner sleeve 22b is arranged on the side of the inner sleeves 22b arranged in a triangle close to the driving direction. When a force is applied, the force will be transmitted through the center of the circle of this inner sleeve 22b. In this embodiment, when the vehicle impact direction is uncertain, the triangular support structure can disperse the stress in multiple directions and is more suitable for multi-angle collision environments such as curves.

[0031] In an embodiment of the present invention, in order to improve the energy absorption capacity and deformation control ability of the buffer unit 22 during the impact process, a filler 22b1 is arranged inside the inner sleeve 22b. The filler 22b1 is a foam metal or a honeycomb structure material. As Figure 7As shown, a filler 22b1 is provided inside the cavity of each inner sleeve 22b. When the filler 22b1 is compressed and deformed by an external force, it can achieve the functions of energy absorption and buffer shock absorption through changes in the material structure. The filler 22b1 is preferably a foam metal or a honeycomb structure material, both of which are typical high-efficiency energy absorption materials and have the advantages of light weight and excellent buffer energy absorption performance. In this embodiment, the inner sleeve 22b itself has a certain structural buffer function. When combined with the filling material, a cooperative working mechanism of structural energy absorption and material energy absorption can be achieved during an impact, significantly improving the overall energy absorption capacity.

[0032] In an embodiment of the present invention, a sealing cap 41 is provided at the end of the column 4 away from the ground. The sealing cap 41 has a mounting hole 42 for mounting a warning sign. As Figure 8 shown, through the setting of the structure of the sealing cap 41, not only can the upper end of the column 4 be effectively sealed to prevent foreign objects from entering, but it is also convenient to quickly install or replace the warning sign at the top of the column 4, improving the traffic safety assistance function of the guardrail. It should be noted here that the mounting hole 42 adopts a structure such as screw connection, snap connection or plug connection, and the warning sign can be conveniently disassembled and replaced, improving the road operation and maintenance efficiency.

[0033] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A road guardrail, characterized in that: include: Main line section guardrails are set up on straight sections of the road; Curved section guardrails are installed at level crossings; A transition section guardrail, connecting the main line section guardrail and the curve section guardrail; Among them, the highest point height of the main line section guardrail is higher than the highest point height of the curve section guardrail, the highest point height of the curve section guardrail is configured to be lower than the driver's driving line of sight, and the transition section guardrail is gradually lowered in height from the main line section guardrail toward the curve section guardrail.

2. The road guardrail according to claim 1, characterized in that: The main line section guardrail, the curve section guardrail and the transition section guardrail all include a column, a connector and a guardrail plate. One end of the column is vertically installed on the ground, and the connector is installed on the other end of the column. The connector is used to connect the column and the guardrail plate.

3. The road guardrail according to claim 2, characterized in that: The guardrail plates in the main line section guardrail and the transition section guardrail are straight corrugated plates, and the guardrail plates in the curve section guardrail are arc-shaped corrugated plates.

4. The road guardrail according to claim 2, characterized in that: In the main line section guardrail and the transition section guardrail, the column is arranged on the side of the guardrail plate relatively far away from the road, and one side of the connecting piece is in contact with the column and the other side is in contact with the guardrail plate.

5. The road guardrail according to claim 2, characterized in that: In the curved section guardrail, the guardrail plates are arranged on both sides of the upright column relatively close to and / or far from the road.

6. The road guardrail according to claim 5, characterized in that: The curved section guardrail forms a storage space, in which a plurality of buffer units distributed along the direction of the guardrail plate are arranged, and a single buffer unit includes an outer sleeve and a plurality of inner sleeves.

7. The road guardrail according to claim 6, characterized in that: The outer sleeve contacts the guardrail plates on both sides, and three inner sleeves are provided. The three inner sleeves are arranged in a triangle, and the inner sleeves are tangent to each other in pairs, and the three inner sleeves are tangent to the inner wall of the outer sleeve.

8. The road guardrail according to claim 7, characterized in that: A filler is arranged in the inner sleeve.

9. The road guardrail according to claim 8, characterized in that: The filler is foam metal or honeycomb structure material.

10. The road guardrail according to claim 2, characterized in that: A blocking cap is arranged at the end of the column away from the ground. The blocking cap has a mounting hole, and the mounting hole is used for mounting a warning sign.

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