Durable and high-strength guardrail connecting device
The guardrail connection device, which uses a UHPC protective shell and telescopic rod structure, solves the problem of guardrail connection damage caused by bridge thermal expansion and contraction and vibration, and achieves stable connection and improved safety between bridge and highway guardrail.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 山西交通科学研究院集团有限公司
- Filing Date
- 2026-03-10
- Publication Date
- 2026-04-24
AI Technical Summary
Existing guardrail connection devices are prone to damage when bridges expand and contract due to heat and vibration, leading to safety hazards, especially at the connection between highways and bridges.
The guardrail adopts a UHPC protective shell and telescopic rod structure, combined with a spring and threaded rod system, to achieve a tight connection and buffer protection, adapting to bridge deformation and vibration.
It improves the stability and safety of the connection between highway and bridge guardrails, ensures traffic safety, and prevents the device from being damaged by bridge deformation and vibration.
Smart Images
Figure CN121915656A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of guardrail connection, specifically a durable and high-strength guardrail connection device. Background Technology
[0002] Road transportation is one of the most common modes of travel. To facilitate travel and minimize distances, highway construction, especially of expressways, often involves tunneling and building bridges to cross rivers, valleys, and traverse mountainous terrain. According to expressway design specifications, guardrails are installed on both sides of expressways to ensure driving safety. Similarly, guardrails are also installed on both sides of bridges to ensure vehicle safety. However, the guardrails used at the transition from a road to a bridge are generally different. Roadways primarily use steel crash barriers, while bridges... The road section is mainly equipped with concrete guardrails. In order to ensure the safe driving of vehicles on and off the bridge, it is necessary to connect the guardrails of the two sections tightly through a connecting device. However, the bridge itself will deform due to thermal expansion and contraction, and the bridge may also vibrate due to external factors such as environmental weather. The connecting device of the two guardrails is prone to damage to its structure when the bridge deforms or vibrates, thus causing safety hazards at the connection point of the two guardrails. In addition, the outer protective layer of this patent is made of ultra-high performance concrete (UHPC) material, which has high strength and high durability, and can effectively guarantee strength and durability. Summary of the Invention
[0003] This invention provides a durable and high-strength guardrail connection device to overcome the deficiencies in the prior art.
[0004] This invention is achieved through the following technical solution: A durable and high-strength guardrail connecting device includes a UHPC protective shell with openings at both ends. The UHPC protective shell has a trapezoidal longitudinal section. The bottom center of the UHPC protective shell is fixedly connected to the top of a vertical rod. The side of the vertical rod facing one opening of the UHPC protective shell is fixedly connected from top to bottom to one end of several horizontally arranged first telescopic rods. The side of the vertical rod facing the other opening of the UHPC protective shell is hinged from top to bottom to one end of several horizontally arranged connecting rods. A through groove is formed on the connecting rod, and a movable block is set in the through groove. Limiting blocks are set at both ends of the movable block outside the through groove, and the limiting blocks cannot pass through the through groove. One end of the movable block is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to the side of the through groove near the vertical rod. One of the limiting blocks is fixedly connected to one side of a "U"-shaped seat. The first telescopic rod and the second telescopic rod are fixedly connected. The limiting block is fixedly connected to the other side of the "U"-shaped seat. The end of the "U"-shaped seat away from the vertical rod is connected to one end of the second telescopic rod. A guardrail fixing device is provided at the other end of both the first and second telescopic rods. A horizontal plate is provided on each side of the bottom of the UHPC protective shell. A through hole is opened at each end of the horizontal plate. A groove is opened on the road surface or ground below the through hole. A rust-proof box with an upper opening is provided in the groove. The rust-proof box is fixedly connected to the groove through an adhesive layer. The bottom of the rust-proof box is fixedly connected to the bottom end of the vertically arranged second spring. The top of the second spring is fixedly connected to the bottom of the placement plate. The top center of the placement plate is fixedly connected to the bottom of the vertically arranged screw. The top of the screw passes through the through hole. The top of the screw is threadedly connected to the nut. The screw and nut cooperate to fix the horizontal plate.
[0005] As described above, a durable and high-strength guardrail connection device includes two arc-shaped plates. The rear end of one arc-shaped plate is fixedly connected to the other end of a first or second telescopic rod. The other arc-shaped plate can be fastened to the arc-shaped plate fixedly connected to the other end of the first or second telescopic rod. A fixing lug is provided at each end of the two arc-shaped plates on one side close to each other. The fixing lugs at corresponding positions of the two arc-shaped plates are connected by bolts.
[0006] As described above, in a durable and high-strength guardrail connection device, the vertical rod is fixedly connected to one end of several fixed rods from top to bottom, and the other end of the fixed rods is fixedly connected to the inner wall of the UHPC protective shell.
[0007] As described above, in a durable and high-strength guardrail connection device, the vertical rod is a telescopic rod structure, and the bottom end of the vertical rod is fixedly connected to the center of the bottom of the support plate.
[0008] As described above, a durable and high-strength guardrail connection device has a rubber layer at the bottom of the support plate.
[0009] As described above, a durable and high-strength guardrail connecting device includes a vertically perforated hole at the center of the screw, a bearing hole at the corresponding position of the placement plate, a vertically threaded rod inside the perforation, the top of the threaded rod being above the screw, the top of the threaded rod being fixedly connected to the center of the bottom of the rotating block, the lower part of the threaded rod being fixedly connected to the inner ring of the bearing, the outer ring of the bearing being fixedly connected to the bearing hole, a threaded sleeve being provided at the bottom of the rust-proof box, the threaded sleeve being located inside a second spring, the bottom of the threaded sleeve being fixedly connected to the top of the moving plate, a third spring being provided between the bottom of the moving plate and the bottom of the rust-proof box, and the lower part of the threaded rod being threadedly connected to the threaded sleeve.
[0010] As described above, a durable and high-strength guardrail connection device has a rubber reinforcing layer on the outside of the UHPC protective shell.
[0011] As described above, a durable and high-strength guardrail connection device has several fluorescent warning strips on the side of the UHPC protective shell facing the road surface.
[0012] The advantages of this invention are: it can tightly connect highway guardrails and bridge guardrails, and also effectively protect the device when the bridge deforms or vibrates, thereby ensuring a stable connection at the joint between the highway guardrails and bridge guardrails, effectively improving the safety of the joint and ensuring traffic safety. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is one of the structural schematic diagrams of the present invention; Figure 2 yes Figure 1 A magnified view of part I; Figure 3 yes Figure 2 A magnified view of part II; Figure 4 This is the second schematic diagram of the structure of the present invention; Figure 5 yes Figure 4 View from direction A; Figure 6 yes Figure 5 An enlarged view of the B-direction view.
[0015] Reference numerals: 1. UHPC protective shell; 2. Vertical rod; 3. First telescopic rod; 4. Connecting rod; 5. Through slot; 6. Moving block; 7. Limiting block; 8. First spring; 9. "U"-shaped seat; 10. Second telescopic rod; 11. Horizontal plate; 12. Through hole; 13. Groove; 14. Rust-proof box; 15. Adhesive layer; 16. Second spring; 17. Placement plate; 18. Screw; 19. Nut; 20. Arc plate; 21. Fixing ear; 22. Bolt; 23. Fixing rod; 24. Support plate; 25. Rubber layer; 26. Perforation; 27. Bearing hole; 28. Threaded rod; 29. Rotating block; 30. Bearing; 31. Threaded sleeve; 32. Moving plate; 33. Third spring; 34. Reinforcing layer; 35. Fluorescent warning strip. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] A durable and high-strength guardrail connection device includes a UHPC protective shell 1 with openings at both ends. The longitudinal section of the UHPC protective shell 1 is trapezoidal. The bottom center of the UHPC protective shell 1 is fixedly connected to the top of a vertical rod 2. The side of the vertical rod 2 facing one opening of the UHPC protective shell 1 is fixedly connected from top to bottom to one end of several horizontally arranged first telescopic rods 3. The side of the vertical rod 2 facing the other opening of the UHPC protective shell 1 is hinged from top to bottom to one end of several horizontally arranged connecting rods 4. A through groove 5 is opened on the connecting rod 4. A movable block 6 is arranged in the through groove 5. Limiting blocks 7 are set at both ends of the movable block 6 outside the through groove 5. The limiting blocks 7 cannot pass through the through groove 5. The movable block 6 is fixedly connected to one end of a first spring 8. The other end of the first spring 8 is fixedly connected to the side of the through groove 5 near the vertical rod 2. One of the limiting blocks 7 is fixedly connected to one side of a "U"-shaped seat 9. The other limiting block 7 is fixedly connected to... The other side of the "U"-shaped seat 9 is fixedly connected. The end of the "U"-shaped seat 9 away from the vertical rod 2 is connected to one end of the second telescopic rod 10. The other ends of the first telescopic rod 3 and the second telescopic rod 10 are each equipped with a guardrail fixing device. A horizontal plate 11 is respectively set on both sides of the bottom of the UHPC protective shell 1. A through hole 12 is opened at each end of the horizontal plate 11. A groove 13 is opened on the road surface or ground below the through hole 12. A rust-proof box 14 with an upper opening is set in the groove 13. The rust-proof box 14 is fixedly connected to the groove 13 by an adhesive layer 15. The bottom of the rust-proof box 14 is fixedly connected to the bottom end of the vertically set second spring 16. The top of the second spring 16 is fixedly connected to the bottom of the placement plate 17. The top center of the placement plate 17 is fixedly connected to the bottom of the vertically set screw 18. The top of the screw 18 passes through the through hole 12. The top of the screw 18 is threadedly connected to the nut 19. The screw 18 and the nut 19 cooperate to fix the horizontal plate 11.In use, this invention first connects the first telescopic rod 3 to the highway guardrail post via a guardrail fixing device, and the second telescopic rod 10 is connected to the bridge guardrail post via a guardrail fixing device. Since guardrail posts are typically cylindrical, the two guardrail posts are fixedly connected via the guardrail fixing devices at both ends. Simultaneously, the lengths of the first telescopic rod 3 and the second telescopic rod 10 can be easily adjusted according to the distance between the two guardrails to ensure a tight connection. Furthermore, the UHPC protective shell 1 and the reinforcing element 34 work together to effectively protect vehicles that accidentally collide with the connection point of the two guardrails, preventing damage to the internal structure of this invention due to vehicle collisions and ensuring long-term stable use. When the bridge deforms or vibrates, causing displacement of the bridge surface and guardrail, the second telescopic rod 10 is fixedly connected to the limiting block 7 and the moving block 6 via a "U"-shaped seat 9. The moving block 6 is located in the through-hole of the connecting rod 4. Within the groove 5, the connecting rod 4 is hinged to the vertical rod 2. Therefore, when the bridge deforms or vibrates, causing displacement of the bridge surface and guardrail, it can move within the displacement range of the bridge surface. At the same time, a first spring 8 is installed between the moving block 6 and the through groove 5. When displacement deformation occurs, the first spring 8 can buffer the deformation force caused by the bridge displacement, thereby ensuring the connection between the two guardrails. Since the anti-collision shell 1 is also installed across both the highway and the bridge section, when the bridge deforms or vibrates, causing displacement of the bridge surface and guardrail, the second spring 16 can effectively buffer the displacement of the UHPC protective shell 1 caused by the bridge displacement, thereby ensuring its long-term stable use. Meanwhile, the anti-rust box 14 can effectively prevent the second spring 16 from being corroded and rusted by the soil environment, ensuring its long-term stable use. At the same time, the anti-rust box 14 can be easily and firmly fixed in the groove 13 by the adhesive layer 15, such as concrete mixed with adhesive, thereby ensuring the stability of the invention during use.
[0018] Specifically, the guardrail fixing device described in this embodiment includes two arc-shaped plates 20. The rear end of one arc-shaped plate 20 is fixedly connected to the other end of the first telescopic rod 3 or the second telescopic rod 10. The other arc-shaped plate 20 can be fastened to the arc-shaped plate 20 fixedly connected to the other end of the first telescopic rod 3 or the second telescopic rod 10. A fixing lug 21 is provided at each end of one of the two arc-shaped plates 20, close to each other. The fixing lugs 21 at corresponding positions of the two arc-shaped plates 20 are connected by bolts 22. In this invention, the fixing lugs 21 of the two arc-shaped plates 20 connected by bolts 22 can easily and tightly fit with guardrail posts of different diameters, facilitating use.
[0019] Specifically, since the vertical rod 2 is only fixedly connected to the top of the UHPC protective shell 1, its stability is poor. To overcome this problem, in this embodiment, the vertical rod 2 is fixedly connected from top to bottom to one end of several fixing rods 23, and the other end of the fixing rods 23 is fixedly connected to the inner wall of the UHPC protective shell 1. The fixing rods 23 can increase the stability of the vertical rod 2 during use.
[0020] More specifically, in this embodiment, the vertical rod 2 is a telescopic rod structure, and the bottom end of the vertical rod 2 is fixedly connected to the center of the bottom of the support plate 24. The telescopic rod structure of the vertical rod 2 allows the support plate 24 to contact the road surface, thereby further stabilizing and supporting the vertical rod 2.
[0021] Preferably, a rubber layer 25 is provided at the bottom of the support plate 24. The rubber layer 25 enables the support plate 24 to better contact and cooperate with uneven road surfaces, ensuring that it provides further stable support for the vertical rod 2.
[0022] Furthermore, since the first spring 8 and the second spring 16 will deform to different degrees after the bridge deforms, maintaining this deformation state for a long time will affect their service life. While the first spring 8 can be easily restored to its optimal state by adjusting the length of the second telescopic rod 10, the second spring 16 lacks adjustment means. To overcome the above problems, in this embodiment, a through hole 26 is vertically opened in the center of the screw 18, and a bearing hole 27 is opened in the corresponding position of the placement plate 17 and the through hole 26. A threaded rod 28 is vertically arranged in the through hole 26, and the top of the threaded rod 28 is located at the screw... Above rod 18, the top end of threaded rod 28 is fixedly connected to the center of the bottom of rotating block 29, the lower part of threaded rod 28 is fixedly connected to the inner ring of bearing 30, the outer ring of bearing 30 is fixedly connected to bearing hole 27, a threaded sleeve 31 is provided at the bottom of rustproof box 14, the threaded sleeve 31 is located inside the second spring 16, the bottom of threaded sleeve 31 is fixedly connected to the top of moving plate 32, a third spring 33 is provided between the bottom of moving plate 32 and the bottom of rustproof box 14, and the lower part of threaded rod 28 is threadedly connected to threaded sleeve 31. When the bridge deforms or vibrates, causing displacement of the bridge surface and resulting in deformation of the second spring 16, the present invention can conveniently rotate the threaded rod 28 by rotating the rotating block 29, thereby causing the placement plate 17 and the top of the second spring 16 connected to it to move upward or downward, thus conveniently realizing the adjustment after the deformation of the second spring 16. At the same time, when the bridge deforms or vibrates, causing displacement of the bridge surface and resulting in deformation of the second spring 16, the third spring 33 will drive the threaded sleeve 31 to move accordingly, thereby avoiding hard deformation of the threaded sleeve 31 and the threaded rod 28, which would cause damage to both and ensure their normal use.
[0023] Furthermore, in this embodiment, the UHPC protective shell 1 is provided with several fluorescent warning strips 35 on the side facing the road surface. The fluorescent warning strips 35 can serve as a warning at night to prevent traffic accidents.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A durable and high-strength guardrail connection device, characterized in that: The system includes a UHPC protective shell (1) with openings at both ends. The longitudinal section of the UHPC protective shell (1) is trapezoidal. The bottom center of the UHPC protective shell (1) is fixedly connected to the top of a vertical rod (2). The side of the vertical rod (2) facing the opening at one end of the UHPC protective shell (1) is fixedly connected from top to bottom to one end of several horizontally arranged first telescopic rods (3). The side of the vertical rod (2) facing the opening at the other end of the UHPC protective shell (1) is hinged from top to bottom to one end of several horizontally arranged connecting rods (4). Next, a through groove (5) is opened on the connecting rod (4), and a moving block (6) is set in the through groove (5). The moving block (6) is located at both ends of the outside of the through groove (5) and a limiting block (7) is set. The limiting block (7) cannot pass through the through groove (5). The moving block (6) is fixedly connected to one end of the first spring (8), and the other end of the first spring (8) is fixedly connected to the side of the through groove (5) near the vertical rod (2). One of the limiting blocks (7) is fixedly connected to one side of the "U"-shaped seat (9), and the other limiting block (7) is fixedly connected to the "U"-shaped seat (9) on the other side. One side is fixedly connected, and the end of the "U"-shaped seat (9) away from the vertical rod (2) is connected to one end of the second telescopic rod (10). The other end of the first telescopic rod (3) and the second telescopic rod (10) are both equipped with a guardrail fixing device. A horizontal plate (11) is set on each side of the bottom of the UHPC protective shell (1). A through hole (12) is opened at each end of the horizontal plate (11). A groove (13) is opened on the road surface or ground below the through hole (12). A rust-proof box (14) is set in the groove (13) with an upper opening. The rust-proof box (14) is set in the groove (13). The rustproof box (14) is fixedly connected to the groove (13) by the adhesive layer (15). The bottom of the rustproof box (14) is fixedly connected to the bottom of the vertically arranged second spring (16). The top of the second spring (16) is fixedly connected to the bottom of the placement plate (17). The top center of the placement plate (17) is fixedly connected to the bottom of the vertically arranged screw (18). The top of the screw (18) passes through the through hole (12). The top of the screw (18) is threadedly connected to the nut (19). The screw (18) and the nut (19) cooperate to fix the horizontal plate (11).
2. The durable and high-strength guardrail connecting device according to claim 1, characterized in that: The guardrail fixing device includes two arc-shaped plates (20). The rear end of one arc-shaped plate (20) is fixedly connected to the other end of the first telescopic rod (3) or the second telescopic rod (10). The other arc-shaped plate (20) can be fastened to the arc-shaped plate (20) fixedly connected to the other end of the first telescopic rod (3) or the second telescopic rod (10). The two arc-shaped plates (20) are respectively provided with a fixing ear (21) at one end close to each other. The fixing ears (21) at corresponding positions of the two arc-shaped plates (20) are connected by bolts (22).
3. The durable and high-strength guardrail connecting device according to claim 1, characterized in that: The vertical rod (2) is fixedly connected to one end of several fixed rods (23) from top to bottom, and the other end of the fixed rods (23) is fixedly connected to the inner wall of the UHPC protective shell (1).
4. The durable and high-strength guardrail connecting device according to claim 1, characterized in that: The vertical rod (2) is a telescopic rod structure, and the bottom end of the vertical rod (2) is fixedly connected to the center of the bottom of the support plate (24).
5. A durable and high-strength guardrail connecting device according to claim 4, characterized in that: A rubber layer (25) is provided at the bottom of the support plate (24).
6. The durable and high-strength guardrail connecting device according to claim 1, characterized in that: A through hole (26) is vertically opened in the center of the screw (18). A bearing hole (27) is opened in the corresponding position of the placement plate (17) and the through hole (26). A threaded rod (28) is vertically arranged in the through hole (26). The top of the threaded rod (28) is located above the screw (18). The top of the threaded rod (28) is fixedly connected to the bottom center of the rotating block (29). The lower part of the threaded rod (28) is fixedly connected to the inner ring of the bearing (30). The outer ring of the bearing (30) is fixedly connected to the bearing hole (27). A threaded sleeve (31) is arranged at the bottom of the rustproof box (14). The threaded sleeve (31) is located in the second spring (16). The bottom of the threaded sleeve (31) is fixedly connected to the top of the moving plate (32). A third spring (33) is arranged between the bottom of the moving plate (32) and the bottom of the rustproof box (14). The lower part of the threaded rod (28) is threadedly connected to the threaded sleeve (31).
7. A durable and high-strength guardrail connecting device according to claim 1, characterized in that: The UHPC protective shell (1) is made of ultra-high performance concrete material, and a reinforcing layer (34) of the same material is provided on the outside.
8. A durable and high-strength guardrail connecting device according to claim 1, characterized in that: The UHPC protective shell (1) has several fluorescent warning strips (35) on the side facing the road surface.