Anchorage-free guardrail

Abstract

The utility model relates to the technical field of highway traffic facilities, and specifically is an anchor-free guardrail, including counterweight base, guardrail stand and guardrail crossbeam, the counterweight base is placed on the road surface without anchoring, the guardrail stand is the pole -like structure of vertical arrangement, the lower part of guardrail stand is detachably installed on the counterweight base through plug -in plug -out type connecting structure, the guardrail crossbeam is the pole -like structure of horizontal arrangement, and both ends of guardrail crossbeam are fixedly connected on two guardrail stands. The anchor-free guardrail structure is simple, and convenient to dismount, can be moved flexibly with construction, and the plug-in plug-out type connection adapts to various stand, guarantees stability, and different crossbeam types satisfy multiple protection demand, and energy absorption guide or light weight high strength is combined, and the fixed mode is reliable and flexible, effectively guarantees the safety of construction personnel, reduces the accident loss, and improves construction efficiency and resource utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of highway traffic facilities technology, specifically to an anchor-free guardrail. Background Technology

[0002] In road traffic systems, guardrails, as important traffic safety facilities, are widely used on the outer shoulders of roads, traffic dividers, and pedestrian curbs. In highway scenarios, guardrails play a crucial role, their core function being to effectively prevent vehicles from veering off the road and to guide them. Related research shows that if highways lack guardrails with guiding functions, the risk of vehicles losing control and veering off the road increases significantly. Furthermore, out-of-control vehicles are highly likely to collide with other vehicles traveling normally on the road, leading to more serious traffic accidents and causing enormous losses to life and property.

[0003] In recent years, with the rapid development of my country's economy and the accelerated pace of modernization, traffic flow has shown a continuous upward trend. Many highways built in earlier years are no longer able to meet the ever-increasing passenger demand. Considering that building new highways is not only costly but also has a long construction period, widening and upgrading existing highways has become a more economical and efficient option. However, the widening and upgrading of existing highways faces many special requirements. Among them, the installation of guardrails is particularly critical.

[0004] During road construction, due to the dynamic changes in the construction area and the progress of construction, guardrails need to be able to move at any time. This requires that guardrails not be installed using the traditional method of anchoring to the road surface. However, the common guardrails currently on the market, if not anchored to the ground, will have their impact resistance significantly weakened or even essentially lost. In this situation, the safety of construction workers faces a severe challenge. In the event of a traffic accident, out-of-control vehicles will directly collide with construction workers and on-site facilities and equipment, causing serious injury not only to the vehicle's driver and passengers but also endangering the lives of construction workers, thereby hindering the construction progress and affecting the smooth progress of the entire project.

[0005] Therefore, developing an anchor-free guardrail that requires no anchoring yet provides a certain level of crash protection and is suitable for special construction scenarios such as highway reconstruction and expansion is of great practical significance and application value. Utility Model Content

[0006] To address the aforementioned issues, this utility model provides an anchor-free guardrail. This anchor-free guardrail features a simple structure, convenient assembly and disassembly, and flexible movement during construction. Its plug-in connection adapts to various posts, ensuring stability. Different beam types meet diverse protection needs, combining energy absorption and guidance with lightweight and high strength. The fixing method is reliable and flexible, effectively ensuring the safety of construction personnel, reducing accident losses, and improving construction efficiency and resource utilization.

[0007] The technical solution of this utility model is as follows:

[0008] An anchor-free guardrail includes a counterweight base, guardrail posts, and guardrail beams. The counterweight base is placed on the road surface without anchoring. The guardrail posts are vertically arranged rod-shaped structures, and the lower part of the guardrail posts is detachably installed on the counterweight base through a plug-in connection structure. The guardrail beams are horizontally arranged rod-shaped structures, and the two ends of the guardrail beams are fixedly connected to two guardrail posts respectively.

[0009] Furthermore, the plug-in connection structure includes a plug-in hole located on the top of the counterweight base that mates with the lower part of the guardrail post.

[0010] Optionally, the guardrail post is a round steel pipe, and the insertion hole is a round hole.

[0011] Optionally, the guardrail post is a square steel pipe, and the insertion hole is a square hole.

[0012] Optionally, the guardrail post is made of H-beams and the insertion hole is an H-shaped hole.

[0013] Optionally, the guardrail beams are corrugated beams.

[0014] Furthermore, the guardrail beams are either two-wave beams, three-wave beams, or M-shaped beams.

[0015] Optionally, the guardrail beams can be made of cold-formed steel.

[0016] Furthermore, the guardrail beams are made of square or rectangular steel pipes.

[0017] Furthermore, the guardrail beams are fixedly connected to the guardrail posts by bolts or fixedly installed on the guardrail posts by brackets.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model discloses an anchor-free guardrail, which consists of a counterweight base, guardrail posts, and guardrail beams, with a simple and clear structure. The counterweight base is placed on the road surface without anchoring, eliminating the constraints of complex anchoring operations required for traditional guardrails on the road surface. This makes the installation and dismantling of the guardrail extremely simple and quick. In construction scenarios such as highway reconstruction and expansion, where the construction area and progress may change at any time, this guardrail can be quickly adjusted according to actual needs, achieving flexible layout, greatly improving construction efficiency, and reducing construction delays caused by guardrail installation and adjustment. The guardrail posts are detachably installed on the counterweight base through a plug-in connection structure, giving the guardrail a high degree of flexibility. When the construction phase ends or the construction area needs to be replanned, workers can easily pull the guardrail posts from the counterweight base for quick dismantling. The dismantled guardrail components can be easily transported to the new construction site for reinstallation, effectively reducing construction costs, improving resource utilization, and conforming to the concepts of green construction and sustainable development.

[0020] 2. This utility model discloses an anchor-free guardrail. The plug-in connection structure of this anchor-free guardrail achieves connection through plug-in holes on the top of the counterweight base that fit the gap between the bottom of the guardrail post and the base. This ensures that the guardrail post can be smoothly inserted into the plug-in holes for quick installation. Furthermore, the reasonable gap design provides stability to the guardrail post after installation, enabling it to withstand certain external impacts and preventing easy shaking or detachment during normal use, thus ensuring the overall safety and reliability of the guardrail. It also adapts to various post shapes, enhancing versatility: for guardrail posts of different shapes (such as round steel pipes, square steel pipes, and H-beams), the plug-in holes are correspondingly designed as round, square, or H-shaped holes. This diverse adaptability design allows the guardrail system to flexibly select posts of different materials and shapes to meet different engineering scenarios and design requirements. For example, in areas requiring higher strength and stability, H-beam posts can be used; in areas prioritizing cost-effectiveness and ease of construction, round or square steel pipe posts can be used, greatly enhancing the versatility and applicability of the guardrail.

[0021] 3. This utility model discloses an anchor-free guardrail. When the guardrail beams are made of corrugated beams (such as two-wave, three-wave, or M-shaped beams), their unique corrugated structure can generate continuous plastic deformation upon vehicle impact. This deformation process effectively absorbs the enormous energy generated by the vehicle collision, reducing the damage to both the vehicle and the guardrail. Simultaneously, the corrugated beams guide the vehicle along the guardrail's extension direction, preventing the vehicle from losing control and running off the road or colliding with other obstacles, thus reducing the severity of the accident and protecting the lives of occupants and construction workers. Different specifications of corrugated beams provide a wide range of choices for guardrail applications in different scenarios. Two-wave beams have a relatively simple structure and lower cost, making them suitable for areas with relatively low protection requirements. Three-wave beams have higher strength and better energy absorption, making them suitable for highway reconstruction and expansion areas with high traffic volume and speed. M-shaped beams, with their unique shape, can better adapt to installation needs and provide reliable protection in special terrains or complex environments.

[0022] 4. This utility model discloses an anchor-free guardrail. When cold-formed steel (such as square or rectangular steel pipes) is used as the guardrail beam, it has significant advantages in terms of light weight and high strength. The lightweight design reduces the overall weight of the guardrail, making it easier to transport and install, and reducing construction difficulty and labor intensity. At the same time, the high strength ensures that the guardrail can withstand greater impact force when hit by vehicles, effectively blocking vehicles and providing reliable safety for construction personnel and passing vehicles. The cold-formed steel undergoes a special cold-forming process, which optimizes its internal structure and gives it good mechanical properties, enabling it to maintain stable performance in various harsh environments. In addition, the surface of the cold-formed steel is usually treated with anti-corrosion, giving it good corrosion resistance, which can effectively extend the service life of the guardrail, reduce later maintenance costs, and ensure that it maintains reliable protective function during long-term use.

[0023] 5. This utility model discloses an anchor-free guardrail. The guardrail beams are fixed to the guardrail posts by bolts or by brackets. Both fixing methods offer high connection strength and stability. Bolt connections are convenient to install and allow for easy disassembly and replacement of the beams. When maintenance or beam replacement is needed, large-scale disassembly of the entire guardrail is unnecessary, reducing maintenance and time costs. Bracket fixing provides more even support, making the connection between the beams and posts more robust and effectively resisting torque and shear forces generated by vehicle impacts, further enhancing the overall stability of the guardrail. Different fixing methods provide greater flexibility in guardrail design and installation. In practical applications, the appropriate fixing method can be selected based on the specific structure of the guardrail, the usage environment, and protection requirements. For example, in areas requiring extremely high connection strength and frequent beam position adjustments, bolt connections are preferred; while in areas requiring high beam support stability, bracket fixing is more suitable. This flexible selection of fixing methods allows the anchor-free guardrail to better adapt to various complex engineering needs. Attached Figure Description

[0024] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of an anchor-free guardrail according to an embodiment of the present utility model;

[0027] Figures 2 to 4 for Figure 1 A sectional view of AA (the guardrail posts are made of round steel pipe, square steel pipe and H-beam respectively);

[0028] The components represented by the various reference numerals in the diagram are:

[0029] This utility model includes: 1. a counterweight base; 11. a plug-in hole; 2. a guardrail post; 3. a guardrail beam; and 4. a bracket. Detailed Implementation

[0030] See Figures 1 to 4 The anchor-free guardrail includes a counterweight base 1, guardrail posts 2, and guardrail beams 3. The concrete counterweight base 1 is placed on the road surface without anchoring. The guardrail posts 2 are vertical rod-shaped structures. The lower part of the guardrail posts 2 is detachably installed on the counterweight base 1 through a plug-in connection structure. The guardrail beams 3 are horizontal rod-shaped structures. The two ends of the guardrail beams 3 are fixedly connected to the two guardrail posts 2 respectively.

[0031] The plug-in connection structure includes a plug-in hole 11 located on the top of the counterweight base 1 and fitted with the lower part of the guardrail post 2; the guardrail post 2 is a round steel pipe, a square steel pipe or an H-shaped steel, and the plug-in hole 11 is a corresponding round hole, a square hole or an H-shaped hole.

[0032] The guardrail beam 3 can be made of corrugated beams such as two-wave beams, three-wave beams or M-shaped beams; or it can be made of cold-formed steel such as square steel pipes or rectangular steel pipes.

[0033] The guardrail beam 3 is fixedly connected to the guardrail post 2 by bolts or fixedly installed on the guardrail post 2 by brackets.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, the anchor-free guardrail in this example consists of a counterweight base 1, guardrail posts 2, and guardrail beams 3.

[0036] The counterweight base 1 is made of precast concrete with anti-slip texture on the bottom surface. It weighs 200kg and can be placed stably on the asphalt road surface. The guardrail post 2 is a circular galvanized steel pipe with a diameter of 114mm. Its lower end is inserted into the circular insertion hole 11 on the top of the counterweight base. The inner diameter of the hole is 116mm, forming a 1mm clearance fit.

[0037] The guardrail beam 3 is made of a two-wave beam plate according to GB / T 31439.1-2015 standard, and is connected to the guardrail post 2 by M16×50 stainless steel bolts.

[0038] During installation, first, arrange the counterweight bases 1 linearly at 5m intervals along the edge of the construction area. Then, vertically insert the guardrail posts 2 into the insertion holes 11 to a depth of 300mm. Finally, horizontally place the pre-punched corrugated beams between adjacent posts and tighten the bolts to 85N·m using a torque wrench. Disassembly is performed by reversing the operation. The entire system can be assembled and disassembled at a speed of 10m / min with the cooperation of two people. Example

[0039] like Figure 4 As shown, in this embodiment, the guardrail post 2 is made of HW150×150×7×10 H-beam steel. The insertion hole 11 on the top of the counterweight base 1 is an H-shaped structure with a hole depth of 350mm and the gap between each side is controlled at 1.5mm. The crossbeam 3 is made of a three-wave beam plate and is connected by a cast steel bracket 4. The bracket is fixed to the guardrail post 2 with 4 sets of M20 bolts. This structure is particularly suitable for scenarios requiring high torsional resistance, such as bridge connection sections. Actual tests show that it can withstand the side impact of a 10-ton vehicle at 45km / h.

[0040] Example 3

[0041] In this embodiment, the guardrail beam 3 is made of 120×60×3mm rectangular cold-formed steel pipe with hot-dip galvanizing treatment (zinc layer thickness ≥85μm). Connecting lugs with mounting holes are welded to both ends of the beam, which is then connected to the posts using M12 bolts. This design reduces weight by 40% compared to corrugated beams, making it suitable for temporary construction areas requiring frequent handling, while maintaining a yield strength of 550MPa.

Claims

1. An anchor-free guardrail, characterized in that, It includes a counterweight base (1), guardrail posts (2) and guardrail beams (3). The counterweight base (1) is placed on the road surface without anchoring. The guardrail posts (2) are vertical rod-shaped structures. The lower part of the guardrail posts (2) is detachably installed on the counterweight base (1) through a plug-in connection structure. The guardrail beams (3) are horizontal rod-shaped structures. The two ends of the guardrail beams (3) are fixedly connected to the two guardrail posts (2) respectively.

2. The anchor-free guardrail according to claim 1, characterized in that, The plug-in connection structure includes a plug-in hole (11) located on the top of the counterweight base (1) and fitted with the lower part of the guardrail post (2).

3. The anchor-free guardrail according to claim 2, characterized in that, The guardrail post (2) is a circular steel pipe, and the insertion hole (11) is a circular hole.

4. The anchor-free guardrail according to claim 2, characterized in that, The guardrail post (2) is a square steel pipe, and the insertion hole (11) is a square hole.

5. The anchor-free guardrail according to claim 2, characterized in that, The guardrail post (2) is made of H-beams and the insertion hole (11) is an H-shaped hole.

6. The anchor-free guardrail according to claim 1, characterized in that, The guardrail beam (3) is a corrugated beam plate.

7. The anchor-free guardrail according to claim 6, characterized in that, The guardrail beam (3) is a two-wave beam plate, a three-wave beam plate, or an M-shaped plate.

8. The anchor-free guardrail according to claim 1, characterized in that, The guardrail beam (3) is made of cold-formed steel.

9. The anchor-free guardrail according to claim 8, characterized in that, The guardrail beam (3) is a square steel pipe or a rectangular steel pipe.

10. The anchor-free guardrail according to claim 1, characterized in that, The guardrail beam (3) is fixedly connected to the guardrail post (2) by bolts or fixedly installed on the guardrail post (2) by brackets.

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