A self-anchoring type of extended guardrail across the ditch
By designing a self-anchored extended guardrail across the ditch, and utilizing structures such as slope line columns, gradient trusses, and diagonal braces, the end anchoring problem of the extended guardrail across the ditch in narrow spaces was solved, thereby improving safety and applicability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INST OF COMM SCI YUNNAN PROV
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-17
AI Technical Summary
When the existing extended guardrails across the ditch are very close to the outer edge of the drainage ditch on the upper slope of the roadside, the end anchoring cannot be implemented in accordance with the specifications, resulting in safety hazards.
Design a self-anchored extended guardrail for cross-ditches, which adopts a structure of slope line columns, gradient trusses, anti-blocking blocks and diagonal braces to form a self-anchoring function at the end, reducing the space requirement of the end anchoring structure.
It achieves effective end anchoring in narrow spaces, improving the safety and applicability of the guardrail, meeting regulatory requirements while reducing the occupation of roadside space.
Smart Images
Figure CN224514115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of highway safety protection facilities, and in particular to a self-anchoring type extended guardrail across a side ditch. Background Technology
[0002] According to the current "Design Specifications for Highway Traffic Safety Facilities" (JTG D81—2017), the upstream end of the roadside corrugated beam guardrail should be extended. To address the issue of drainage ditches at the cut-fill junction affecting the extension of the corrugated beam guardrail, research institutions have developed various extended guardrails that cross the ditch and have implemented them in practice. However, problems with end anchoring have been found in practical applications. The current "Detailed Design Specifications for Highway Traffic Safety Facilities" (JTG / T D81—2017) requires an upstream end anchorage length of 12m for the corrugated beam guardrail, with the corresponding lateral extension width varying under different slope conditions, but generally exceeding 1 meter. However, in practical applications, it has been found that in some road sections, the toe of the roadside upper slope is very close to the outer edge of the drainage ditch. This results in limited space after the extended guardrail crosses the ditch, making it impossible to implement end anchoring as required by the specifications, creating a safety hazard. Utility Model Content
[0003] This utility model addresses the problem of insufficient usable lateral space on the outer side of side ditches by proposing a self-anchoring extended guardrail across the ditch. It has its own end anchoring function, and the space occupied by the end anchoring structure is only 16% of the length of the end anchoring structure of ordinary corrugated beam guardrails as specified in the standard. Moreover, its safety has been verified by full-scale collision tests on actual vehicles, thus solving the end anchoring problem of extended guardrails across side ditches.
[0004] The technical solution of this utility model is as follows:
[0005] A self-anchored extended guardrail across a roadside ditch is characterized by comprising an extended guardrail section across the ditch, the downstream end of which connects to a standard guardrail section and the upstream end of which connects to a self-anchored end. The extended guardrail section has several slope toe line posts arranged in a row along the slope toe line of the upward slope. The upper part of each slope toe line post is connected to a corrugated beam plate sequentially through a gradient truss and a blocking block. The longest gradient truss spanning the entire roadside ditch is located at the downstream end, and the shortest gradient truss completely outside the roadside ditch is located at the upstream end. The corrugated beam plate at the upstream end continues to extend upstream to the first anchor post through a second anchor post and is spliced with a circular end. A diagonal brace is provided between the first anchor post and the second anchor post. The high end of the diagonal brace supports the upper part of the first anchor post, and the low end of the diagonal brace supports the lower part of the second anchor post.
[0006] The upper part of the first anchoring column is directly connected to the circular end by bolts.
[0007] The upper part of the first anchoring column is directly connected to the high end plate of the diagonal brace by bolts, and the lower part of the second anchoring column is directly connected to the low end plate of the diagonal brace by bolts.
[0008] The technical advantages of this utility model are as follows: This utility model provides a self-anchored extended guardrail for crossing side ditches. Through its built-in end anchoring structure, the extended guardrail directly anchors at its ends after crossing the ditch, replacing the conventional upstream end anchoring method for corrugated beam guardrails. It occupies less lateral space on the roadside and can be applied to scenarios where the space from the outer side of the drainage ditch to the toe of the roadside slope is narrow, further expanding the applicability of the extended guardrail for crossing side ditches. More importantly, the safety of this self-anchored extended guardrail for crossing side ditches has been verified through full-scale vehicle collision tests, effectively solving the end anchoring problem of extended guardrails for crossing side ditches.
[0009] The structural advantages of this utility model are: the self-anchored extended guardrail across the ditch has a self-anchored end design, which does not require additional end treatment according to the current specifications, greatly reduces the required roadside space, solves the problem of construction being impossible due to the roadside ditch being too close to the slope, and makes the extended guardrail applicable to a wider range. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the elevation structure of a self-anchoring extended guardrail for a side ditch, which implements this utility model.
[0011] Figure 2 yes Figure 1 A top-view structural diagram.
[0012] Figure 3 This is a schematic diagram of the cross-sectional structure of the outward-extending guardrail adapted to the side ditch using a gradient truss.
[0013] Figure 4 This is a three-dimensional structural schematic diagram of a self-anchoring type extended guardrail for cross-ditches according to this utility model.
[0014] Figure 5 This is a schematic diagram of the self-anchored end elevation structure.
[0015] Figure 6 yes Figure 5 A top-view structural diagram.
[0016] Figure 7 yes Figure 5 A schematic diagram of the cross-sectional structure.
[0017] The labels in the attached drawings are explained as follows: 1-Standard section of guardrail; 2-Outward guardrail across the ditch section; 3-Self-anchored end; 4-Second anchor post; 5-Diagonal brace; 6-First anchor post; 7-Road surface; 8-Circular end; 9-Wave beam (high-strength steel wave beam); 10-Slope toe post; 11-Driving direction; 12-Gradual truss; 13-Roadside ditch; 14-Slope toe; 15-Upward slope; 16-Anti-blocking block. Detailed Implementation
[0018] The following is in conjunction with the attached diagram ( Figures 1-7 The present invention will be described in the following sections and examples.
[0019] Figure 1 This is a schematic diagram of the elevation structure of a self-anchoring extended guardrail for a side ditch, which implements this utility model. Figure 2 yes Figure 1 A top-view structural diagram. Figure 3 This is a schematic diagram of the cross-sectional structure of the outward-extending guardrail adapted to the side ditch using a gradient truss. Figure 4 This is a three-dimensional structural schematic diagram of a self-anchoring type extended guardrail for cross-ditches according to this utility model. Figure 5 This is a schematic diagram of the self-anchored end elevation structure.
[0020] Figure 6 yes Figure 5 A top-view structural diagram. Figure 7 yes Figure 5 A schematic diagram of the cross-sectional structure. (Reference) Figures 1 to 7 As shown, a self-anchored extended guardrail across a roadside ditch includes an extended guardrail 2 across the ditch, with its downstream end connected to a standard guardrail section 1 and its upstream end connected to a self-anchored end section 3. The extended guardrail 2 across the ditch has several toe-line posts 10 arranged in a row along the toe-line 14 of the upward slope 15. The upper part of each toe-line post 10 is connected to a corrugated beam 9 in sequence through a gradient truss 12 and a blocking block 16. The longest gradient truss 12 spanning the entire roadside ditch 13 is... At the downstream end, the shortest gradient truss 12, which is completely outside the roadside ditch 13, is located at the upstream end. The corrugated beam 9 at the upstream end continues to extend upstream to the first anchor column 6 through the second anchor column 4 and is spliced with the circular end 8. A diagonal brace 5 is provided between the first anchor column 6 and the second anchor column 4. The high end of the diagonal brace 5 supports the upper part of the first anchor column 6, and the low end of the diagonal brace 5 supports the lower part of the second anchor column 4 (touching the road surface 7).
[0021] The upper part of the first anchoring column 6 is directly connected to the circular end 8 by bolts. The upper part of the first anchoring column 6 is directly connected to the high end plate of the diagonal brace 5 by bolts, and the lower part of the second anchoring column 4 is directly connected to the low end plate of the diagonal brace 5 by bolts (the low end plate touches the road surface 7).
[0022] To address the problem of insufficient usable lateral space on the outer side of the ditch, this utility model proposes an extended guardrail across the ditch with its own end anchoring function. The space occupied by the end anchoring structure is only 16% of the length of the end anchoring structure of the ordinary corrugated beam guardrail as specified in the standard, and its safety has been verified by full-scale vehicle collision tests, thus solving the end anchoring problem of the extended guardrail across the ditch.
[0023] This invention relates to a self-anchoring extended guardrail for crossing side ditches. The extended guardrail has a built-in end anchoring structure, which allows the extended guardrail to be directly anchored at the end after crossing the side ditch. This can replace the anchoring treatment of the upstream end of conventional corrugated beam guardrails. It occupies little lateral space on the roadside and can be applied to scenarios where the space from the outside of the drainage ditch to the toe of the roadside slope is narrow, further improving the applicability of the extended guardrail for crossing side ditches.
[0024] The embodiments of this utility model are as follows:
[0025] 1. For example Figure 1 , Figure 2 As shown, the self-anchored extended guardrail across the ditch consists of an extended guardrail 2 across the ditch section and a self-anchored end 3. The extended guardrail 2 across the ditch section consists of a corrugated beam plate 9, a blocking block, a gradient truss 12, and a slope toe line column 10. The self-anchored end 3 consists of a corrugated beam plate 9, a circular end 8, a first anchoring column 6, a second anchoring column 4, and a diagonal brace 5.
[0026] 2. For example Figure 3 , Figure 4 As shown, the lengths of the various gradient trusses are different, and the length of the gradient truss 12 varies with the slope of the outward-extending guardrail across the ditch. The gradient truss 12 can take many forms, or it can be a single-layer or double-layer beam with gradually changing length.
[0027] 3. For example Figure 5 , Figure 6 , Figure 7 The self-anchoring end 3 is composed of a first anchoring column 6, a second anchoring column 4, a diagonal brace 5 and a corrugated beam plate 9. The first anchoring column 6 and the second anchoring column 4 are fixed to the ground by piling. The two ends of the diagonal brace 5 are connected to the first anchoring column 6 and the second anchoring column 4 respectively by bolts. The first anchoring column 6 is connected to one end of the corrugated beam plate 9 and the circular end 8.
[0028] 4. The corrugated beam plate used at the self-anchored end 3 has the same structure as the corrugated beam plate used in the outward extension guardrail of the side ditch, which facilitates connection and forms a synergistic whole structure.
[0029] The structural advantages of this utility model:
[0030] The self-anchored extended guardrail across the ditch is designed with self-anchored ends, eliminating the need for additional end treatment according to current specifications. This significantly reduces the required roadside space and solves the problem of construction being impossible due to the proximity of the roadside ditch to the slope, making the extended guardrail applicable to a wider range of situations.
[0031] Contents not described in detail in this specification are existing technologies known to those skilled in the art. It is hereby indicated that the above description is intended to help those skilled in the art understand this invention, but does not limit the scope of protection of this invention. Any equivalent substitutions, modifications, improvements, and / or simplifications of the above descriptions that do not depart from the essential content of this invention fall within the scope of protection of this invention.
Claims
1. A self-anchored extended guardrail for a side ditch, characterized in that, The system includes a standard section of guardrail connected to its downstream end and an extended guardrail section across the ditch connected to its upstream end from the anchoring end. The extended guardrail section across the ditch has several toe-line posts arranged in a row along the toe-line of the upward slope. The upper part of each toe-line post is connected to a corrugated beam plate in sequence through a gradient truss and a blocking block. The longest gradient truss spanning the entire roadside ditch is located at the downstream end, and the shortest gradient truss completely outside the roadside ditch is located at the upstream end. The corrugated beam plate at the upstream end continues to extend upstream to the first anchoring post through the second anchoring post and is spliced with the circular end. A diagonal brace is provided between the first anchoring post and the second anchoring post. The high end of the diagonal brace supports the upper part of the first anchoring post, and the low end of the diagonal brace supports the lower part of the second anchoring post.
2. The self-anchored extended guardrail across the ditch according to claim 1, characterized in that, The upper part of the first anchoring column is directly connected to the circular end by bolts.
3. The self-anchored extended guardrail across the ditch according to claim 1, characterized in that, The upper part of the first anchoring column is directly connected to the high end plate of the diagonal brace by bolts, and the lower part of the second anchoring column is directly connected to the low end plate of the diagonal brace by bolts.