Highway cut-fill junction roadside guardrail end protection system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-08-14
AI Technical Summary
[0002]填挖交界路段公路护栏端部位于计算安全净区范围内时，车辆正面撞击护栏端部的风险较大，造成护栏端部的交通事故频发，且部分路段挖方段护栏外侧与边坡间宽度较大，存在车辆从护栏与挖方边坡间隙穿出后坠下填方段边坡的风险
[0011]本实用新型的技术效果如下：本实用新型高速公路填挖交界路段路侧护栏端部防护系统，提高了高速公路填挖交界路段的安全防护水平。
Smart Images
Figure CN224633846U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety protection technology for the cut-and-fill section of highways, and in particular to a roadside guardrail end protection system for the cut-and-fill section of highways. Background Technology
[0002] When the end of the highway guardrail at the cut-fill section is within the calculated safety clear zone, the risk of a vehicle colliding head-on with the end of the guardrail is relatively high, resulting in frequent traffic accidents at the end of the guardrail. In addition, in some sections, the width between the outer side of the guardrail and the slope in the cut section is relatively large, posing a risk that vehicles may fall down the slope in the cut section after passing through the gap between the guardrail and the cut slope.
[0003] To address the aforementioned issues, current domestic and international standards and regulations do not offer relevant solutions. This invention employs theoretical calculations and computer simulation analysis, combined with full-scale vehicle collision test results, to propose a roadside guardrail end protection system for highway cut-fill section sections. A cost-benefit comprehensive analysis model is used to analyze the system's performance. The results show that the system has good safety, economy, and construction convenience, and can effectively reduce the risk of vehicles passing through the gap between the guardrail and the cut slope. Utility Model Content
[0004] This utility model addresses the defects or deficiencies in the existing technology by providing a roadside guardrail end protection system for the cut-fill section of a highway, which helps to improve the safety protection level of the cut-fill section of a highway.
[0005] The technical solution of this utility model is as follows:
[0006] A roadside guardrail end protection system for the cut-fill section of a highway is characterized by comprising a first boundary section protection structure, a second boundary section protection structure, and a third boundary section protection structure extending sequentially from the cut section guardrail on the highway side in the same direction as the traveling vehicles. The cut section guardrail is a standard guardrail section. The first boundary section protection structure is a guardrail extension structure. The second boundary section protection structure is an anchoring section structure or an outward-extending guardrail end protection structure. The third boundary section protection structure is either the impact-absorbing end of the anchoring section structure or the end anchoring structure of the outward-extending guardrail end protection structure.
[0007] The length of the guardrail extension section shall not be less than W / tanα, where W refers to the lateral distance from the impact face of the guardrail to the toe of the excavated slope, and α is the angle taken as the 15th percentile of the cumulative frequency in the statistics of guardrail collision accidents.
[0008] When the slope is in the form of a retaining wall, the end anchoring structure should extend outward to the retaining wall and be bolted to the retaining wall with the anchoring end;
[0009] When the slope is an earth slope, the end anchoring structure should extend beyond the toe line of the earth slope, wherein the lower edge of the corrugated beam plate is in close contact with the earth slope.
[0010] The column distribution density in the anchoring section structure is higher than that in the guardrail extension section structure.
[0011] The technical effects of this utility model are as follows: This utility model, the roadside guardrail end protection system at the cut-fill junction of highways, improves the safety protection level of the cut-fill junction of highways. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the roadside guardrail end protection system with outward-extending guardrails for the highway cut-fill section where this utility model is implemented.
[0013] Figure 2 This is a schematic diagram of the structure of the roadside guardrail end protection system with anti-collision and energy-absorbing end for implementing the present invention for highway cut-fill section.
[0014] Figure 3 yes Figure 2 A schematic diagram of the facade structure.
[0015] Figure 4 yes Figure 1 A schematic diagram of the elevation structure used for retaining wall slopes.
[0016] Figure 5 yes Figure 4 A top-down view of the structure.
[0017] Figure 6 yes Figure 1 A schematic diagram of the elevation structure used for soil slopes.
[0018] Figure 7 yes Figure 6 A top-down view of the structure.
[0019] The labels in the attached diagram are explained as follows: 1- Highway roadway; 2- Driving vehicle; 3- Driving direction; 4- Embankment guardrail; 6- First boundary protection structure; 7- Second boundary protection structure; 8- Third boundary protection structure; 9- Guardrail end protection structure; 10- Highway road surface; 11- Post; 12- Cut-fill boundary; 13- Standard guardrail section; 14- Collision-absorbing end; 15- Retaining wall slope; 17- Soil slope toe line; W- Distance (distance from the guardrail impact face to the cut slope toe); α- Angle (based on a large number of guardrail collision accidents, taking the angle at the 15th percentile cumulative frequency). Detailed Implementation
[0020] The following is in conjunction with the attached diagram ( Figures 1-7 The present invention will be described in the following sections and examples.
[0021] Figure 1 This is a schematic diagram of the structure of the roadside guardrail end protection system with outward-extending guardrails for the highway cut-fill section where this utility model is implemented. Figure 2 This is a schematic diagram of the structure of the roadside guardrail end protection system with anti-collision and energy-absorbing end for implementing the present invention for highway cut-fill section. Figure 3 yes Figure 2 A schematic diagram of the facade structure. Figure 4 yes Figure 1 A schematic diagram of the elevation structure used for retaining wall slopes. Figure 5 yes Figure 4 A top-down view of the structure. Figure 6 yes Figure 1 A schematic diagram of the elevation structure used for soil slopes. Figure 7 yes Figure 6 A top-view structural diagram. (Reference) Figures 1 to 7 As shown, the roadside guardrail end protection system at the cut-fill section of a highway includes a first boundary section protection structure 6, a second boundary section protection structure 7, and a third boundary section protection structure 8 extending sequentially from the end of the cut-fill section guardrail 4 on the side of the highway pavement 10 in the same direction as the driving direction 3 of the vehicle 2. The cut-fill section guardrail 4 is a standard guardrail section. The first boundary section protection structure 6 is a guardrail extension structure. The second boundary section protection structure 7 is an anchoring section structure or an outward-extending guardrail end protection structure. The third boundary section protection structure 8 is either the anti-collision energy-absorbing end 14 corresponding to the anchoring section structure or the end anchoring structure corresponding to the outward-extending guardrail end protection structure 9.
[0022] like Figure 4 As shown, when the slope is in the form of a retaining wall, the end anchoring structure should extend outward to the retaining wall 15 and be bolted to the retaining wall 15 with the anchoring end.
[0023] like Figure 6 As shown, when the slope is a soil slope, the end anchoring structure should extend beyond the toe line 17 of the soil slope, wherein the lower edge of the corrugated beam plate is in close contact with the soil slope.
[0024] The length of the guardrail extension section shall not be less than W / tanα, where W refers to the lateral distance from the impact face of the guardrail to the toe of the excavated slope, and α is the angle taken as the 15th percentile of the cumulative frequency in the statistics of guardrail collision accidents.
[0025] The distribution density of the columns 11 in the anchoring section structure is higher than that in the guardrail extension section structure.
[0026] The main features of this utility model are:
[0027] 1. The roadside guardrail end protection system at the cut-fill junction of a highway includes a guardrail extension structure, an anchoring section structure, a guardrail end protection structure, and an end anchoring structure. The end protection structure includes the outward-extending guardrail (such as...). Figure 1 ) and impact-absorbing end caps (such as Figure 2 There are two types, with the end anchoring structure included only when the end protective structure of the guardrail is an outward-extending guardrail (such as...). Figure 5 and Figure 7 Only when the end protection structure of the guardrail is an anti-collision energy-absorbing end, including the anchoring section structure (such as...) Figure 3 ).
[0028] like Figure 1 and Figure 2 This indicates that the composition of the roadside guardrail end protection system at the cut-fill junction of the expressway includes: (a) the guardrail end protection structure is an outward-extending guardrail; (b) the guardrail end protection structure is an anti-collision energy-absorbing end.
[0029] 2. The extension section of the guardrail shall be a corrugated beam guardrail, and its protection level shall be the same as that of the guardrail in the embankment or bridge section. The length of the extension section shall not be less than W / tanα, where W refers to the lateral distance from the impact face of the guardrail to the toe of the excavation slope; α is the angle at the 15% cumulative frequency obtained from a large number of guardrail collision accidents (e.g., ...). Figure 1 and Figure 2 ).
[0030] 3. The anchoring section structure is located between the guardrail extension section structure and the anti-collision energy-absorbing end. The structure adopts a corrugated beam guardrail, and the anchoring section posts need to be densified (e.g., Figure 3 (This indicates the installation of the corrugated beam guardrail anchorage section).
[0031] 4. When the end protection structure is an outward-extending guardrail, the end anchoring structure shall be set up in the following manner according to the different slope structure forms:
[0032] (1) When the slope is in the form of a retaining wall, it should extend outward to the retaining wall and be bolted to the retaining wall using anchor ends (e.g. Figures 4 to 5 ).
[0033] (2) When the slope is an earth slope, the corrugated beam should extend outwards onto the slope, with the lower edge of the corrugated beam tightly against the soil slope (e.g., Figures 6 to 7 ).
[0034] Description of the functions and technical advantages of this utility model:
[0035] 1. Accident investigation results show that if a vehicle traveling on a cut-fill section runs off the road, the severity of the accident is the same as that of a vehicle running off the road on a fill / bridge section. This system proposes a guardrail extension structure to reduce the possibility of vehicles running off the road on cut-fill sections.
[0036] 2. The anti-collision energy-absorbing end absorbs the energy of a head-on, side, or oblique collision with a vehicle through its own deformation, allowing the vehicle to stop smoothly; the extended guardrail extends to the outside of the ditch through a special structural design, and its function is the same as that of the standard guardrail, providing protection by blocking and guiding vehicles.
[0037] 3. Currently, the impact-absorbing end caps are generally of the rolled plate type, with sliding structures for the posts, and the ends of the corrugated beam plates are not effectively anchored. Computer simulation analysis results show that adding an anchoring section structure can effectively anchor the corrugated plates of the guardrail extension section.
[0038] 4. Existing regulations stipulate that when located at the junction of cut and fill, the outward end facing the traffic flow should extend outward and be buried in the soil of the cut section that does not constitute an obstacle. However, this is difficult to implement on site. In order to improve the convenience of construction, this utility model proposes targeted end anchoring structures for soil slopes and retaining walls respectively.
[0039] 5. Based on a large amount of accident research data, this system uses methods such as theoretical calculation, computer simulation analysis, and full-scale vehicle collision tests to significantly improve the safety protection level of the cut-and-fill section of the highway.
[0040] 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 roadside guardrail end protection system for highway cut-and-fill junction sections, characterized in that, The system includes a first boundary section protection structure, a second boundary section protection structure, and a third boundary section protection structure that extend sequentially from the end of the embankment section guardrail on the side of the highway in the same direction as the traveling vehicles. The embankment section guardrail is a standard guardrail section. The first boundary section protection structure is a guardrail extension structure. The second boundary section protection structure is an anchoring section structure or an outward-extending guardrail end protection structure. The third boundary section protection structure is either the anti-collision energy-absorbing end of the anchoring section structure or the end anchoring structure of the outward-extending guardrail end protection structure.
2. The roadside guardrail end protection system for the cut-and-fill section of a highway according to claim 1, characterized in that, The length of the guardrail extension section shall not be less than W / tanα, where W refers to the distance from the impact face of the guardrail to the toe of the excavated slope, and α is the angle taken as the 15th percentile of the cumulative frequency in the statistics of guardrail collision accidents.
3. The roadside guardrail end protection system for the cut-and-fill section of a highway according to claim 1, characterized in that, The anchoring section structure is located between the guardrail extension section structure and the anti-collision energy-absorbing end. The structure adopts a corrugated beam guardrail, and the column distribution density is higher than that in the guardrail extension section structure.
4. The roadside guardrail end protection system for the cut-and-fill section of a highway according to claim 1, characterized in that, When the slope is in the form of a retaining wall, the end anchoring structure should extend outward to the retaining wall and be bolted to the retaining wall with the anchoring end.
5. The roadside guardrail end protection system for the cut-and-fill section of a highway according to claim 1, characterized in that, When the slope is a soil slope, the end anchoring structure should extend the corrugated beam plate outward onto the slope, with the lower edge of the corrugated plate tightly attached to the soil slope.