Cantilever type abduction double-layer double-wave beam guardrail structure
By adopting a cantilever outreached double-layer double-corrugated beam guardrail structure at the filling and excavation junction, the traffic accident problem caused by the end of the guardrail in the road calculation safety clean area is solved, effective outreach of the guardrail and the leap of drainage ditch are achieved, and protective performance is improved and materials are saved.
Patent Information
- Application Number
- CN202420939593.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-30
AI Technical Summary
At the junction of filling and excavation, the end of the existing guardrail is located within the highway calculation safety clean area. The risk of the vehicle hitting the end of the front is high, resulting in frequent traffic accidents. The prior art is difficult to effectively solve this problem, especially in the presence of drainage ditches on the roadside.
The cantilever-type outreached double-layer double-corrugated beam guardrail structure is adopted. By connecting the vertical cylindrical connectors at the horizontal end of the cantilever bracket, the outreach of the end of the guardrail and crossing the drainage ditch, improving the protective performance.
This structure can effectively avoid collision between the vehicle and the end of the guardrail, reduce the risk of traffic accidents, and at the same time use the double wave beams in the old road to upgrade and transform, realize the recycling of resources and improve the protective performance of the guardrail.
Smart Images
Figure CN222632125U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of highway guardrails, in particular to a cantilevered outward-extended double-layer double-corrugated beam guardrail structure. Background Art
[0002] With the continuous development of expressways in my country, the construction mileage of expressways in mountainous areas is growing. Affected by topographic and geological conditions, there are many sections where cut-fill and fill roads meet. Taking safety and economic factors into consideration, guardrails are generally not installed on cut-fill sections. Therefore, the roadside guardrails form ends at the cut-fill and fill junctions. Since the end position is within the safe clear area of the highway, the risk of vehicles hitting the end head-on is extremely high, resulting in frequent traffic accidents at the ends of guardrails at the cut-fill and fill junctions, which has triggered adverse social reactions.
[0003] Some existing technologies use the method of directly extending the ordinary corrugated beam guardrail to extend the end of the guardrail outside the calculated safe clear area of the highway. However, because there is a drainage ditch on the side of the excavation section, ordinary corrugated beam guardrail columns cannot be set at the drainage ditch, resulting in insufficient safety performance of the guardrail. Some existing technologies also use the method of modifying the roadside drainage ditch so that ordinary corrugated beam guardrails can be set across the drainage ditch, but the project volume is large and difficult to implement on site. Some other existing technologies use the method of setting energy-absorbing ends to solve this problem, but when there is a large width of space between the roadside guardrail and the upper slope of the excavation section, there is a risk that the vehicle will fall from here to the slope of the fill section. Utility Model Content
[0004] In view of the defects or shortcomings existing in the prior art, the utility model provides a cantilevered outward-extended double-layer double-corrugated beam guardrail structure. By arranging a double-layer double-corrugated beam on a vertical cylindrical connecting piece connected to the lateral end of the cantilever bracket, the double-corrugated beam replaced by the three-corrugated beam in the process of old road upgrading and reconstruction can be fully utilized, thereby realizing a strong beam and weak column structural system with better protective performance on the basis of turning waste into treasure.
[0005] The technical solutions of the utility model are as follows:
[0006] A cantilevered outward-extended double-layer double-corrugated beam guardrail structure, characterized in that it includes a column located outside the side ditch, the upper part of the column laterally extending a cantilever bracket to the inside of the side ditch, the lateral end of the cantilever bracket is connected to a vertical cylindrical connecting piece, the lower half of the lateral end surface of the vertical cylindrical connecting piece is connected to the lower double corrugated beam, and the upper half of the lateral end surface of the vertical cylindrical connecting piece is connected to the upper double corrugated beam.
[0007] An array of heightened reserved holes is arranged on the upper part of the column to adapt to the corresponding increase in the height of the corrugated beam after the road surface is repaved and reconstructed.
[0008] The cantilever bracket includes a horizontal upper chord and a diagonal downward chord, the lower end of the diagonal downward chord is connected to the column, the higher end of the diagonal downward chord is connected to the lower half of the vertical cylindrical connector, one end of the horizontal upper chord is connected to the column, the other end of the horizontal upper chord is connected to the upper half of the vertical cylindrical connector, and vertical webs are distributed between the horizontal upper chord and the diagonal downward chord.
[0009] The top end surface of the vertical cylindrical connecting piece is lower than the upper wave crest of the upper double-corrugated beam and higher than the middle wave trough of the upper double-corrugated beam.
[0010] The bottom end surface of the vertical cylindrical connecting piece is higher than the lower wave crest of the lower double corrugated beam and lower than the middle wave trough of the lower double corrugated beam.
[0011] One end of the upper double-corrugated beam close to the standard section of the guardrail is connected to the three-corrugated beam through a double-wave to three-wave plate, and the other end of the upper double-corrugated beam is provided with a circular end head protruding in accordance with the trend.
[0012] The lower double corrugated beam is provided with a circular end head protruding in accordance with the trend at one end close to the standard section of the guardrail.
[0013] The side ditch formed by the columns located on the outside of the side ditch spans the guardrail section from the end close to the standard section of the guardrail and expands outward at a slope of 1:11.
[0014] The side ditch spanning guardrail section formed by the columns located outside the side ditch is provided with two adjacent anchor columns starting from the end away from the standard section of the guardrail.
[0015] The technical effects of the utility model are as follows: the utility model is a cantilevered outward-extended double-layer double-corrugated beam guardrail structure, in which the columns are arranged on the outside of the drainage ditch, and the corrugated beam plate is supported on the inside of and above the drainage ditch by a cantilever bracket, and the corrugated beam plate is enabled to cross the drainage ditch by changing the length of the cantilever bracket, without changing the original drainage ditch structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a structural schematic diagram of a cantilevered outward-extending double-layer double-corrugated beam guardrail structure.
[0017] Figure 2 The utility model is a schematic diagram of the elevation structure of a cantilevered outward-extended double-layer double-corrugated beam guardrail structure.
[0018] Figure 3 yes Figure 2 Schematic diagram of the plan structure.
[0019] The reference numerals are as follows: 1-side ditch (e.g. drainage ditch); 2-column; 3-cantilever bracket; 4-pavement; 5-lower double corrugated beam; 6-upper double corrugated beam; 7-heightened reserved hole array; 8-horizontal upper chord; 9-oblique lower chord; 10-vertical web member; 11-anchor column; 12-side ditch crossing guardrail section; 13-standard guardrail section; 14-upstream end; 15-downstream end; 16-triple corrugated beam; 17-double-wave to triple-wave plate; 18-double-layer double corrugated beam; 19-driving direction; 20-vertical cylindrical connector. DETAILED DESCRIPTION
[0020] Below is the attached figure ( Figure 1-Figure 3 ) and embodiments illustrate the utility model.
[0021] Figure 1 The utility model is a structural schematic diagram of a cantilevered outward-extending double-layer double-corrugated beam guardrail structure. Figure 2 The utility model is a schematic diagram of the elevation structure of a cantilevered outward-extended double-layer double-corrugated beam guardrail structure. Figure 3 yes Figure 2 Schematic diagram of the plane structure. Figures 1 to 3 As shown, a cantilevered outward-extended double-layer double-corrugated beam guardrail structure includes a column 2 located outside the side ditch, and a cantilever bracket 3 is extended laterally from the upper part of the column 2 to the inner side of the side ditch, and the lateral end of the cantilever bracket 3 is connected to a vertical cylindrical connecting piece 20, and the lower half of the lateral end surface of the vertical cylindrical connecting piece 20 is connected to the lower double corrugated beam 5, and the upper half of the lateral end surface of the vertical cylindrical connecting piece 20 is connected to the upper double corrugated beam 6.
[0022] The upper part of the column 2 is provided with an array of elevated reserved holes 7 to accommodate the corresponding increase in the height of the corrugated beam after the road surface is reconstructed and resurfaced. The cantilever bracket 3 includes a horizontal upper chord 8 and an oblique downward chord 9. The lower end of the oblique downward chord 9 is connected to the column 2, and the higher end of the oblique downward chord 9 is connected to the lower half of the vertical cylindrical connector 20. One end of the horizontal upper chord 8 is connected to the column 2, and the other end of the horizontal upper chord 8 is connected to the upper half of the vertical cylindrical connector 20. Vertical webs 10 are distributed between the horizontal upper chord 8 and the oblique downward chord 9 (the number of vertical webs is determined according to the width of the side ditch span, Figure 1 3 vertical web members are shown in the figure). Thus, the cantilever bracket 3 has a trapezoidal structure.
[0023] The top end surface of the vertical cylindrical connector 20 is lower than the upper crest of the upper double corrugated beam 6 and higher than the middle trough of the upper double corrugated beam 6 (bolts are used to fix the middle trough and the vertical cylindrical connector together). The bottom end surface of the vertical cylindrical connector 20 is higher than the lower crest of the lower double corrugated beam 5 and lower than the middle trough of the lower double corrugated beam 5. The end of the upper double corrugated beam 6 close to the guardrail standard section 13 is connected to the three-corrugated beam 16 through the double-wave to three-wave plate 17, and the other end of the upper double corrugated beam 6 is provided with a circular end protruding in accordance with the trend. The end of the lower double corrugated beam 5 close to the guardrail standard section 13 is provided with a circular end protruding in accordance with the trend.
[0024] The side ditch spanning guardrail section 12 formed by the columns located outside the side ditch expands outward from the end close to the guardrail standard section 13 at a slope of 1:11 (the driving direction 19 points from the end of the side ditch spanning guardrail section 12 away from the guardrail standard section 13 to the end of the side ditch spanning guardrail section 12 close to the guardrail standard section). The side ditch spanning guardrail section 12 formed by the columns located outside the side ditch is provided with two adjacent anchoring columns 11 from the end away from the guardrail standard section 13.
[0025] The utility model has developed a cantilevered outward-extended corrugated beam guardrail structure, in which uprights are arranged on the outside of the drainage ditch, and the corrugated beam plate is supported on the inside of and above the drainage ditch by a cantilever bracket. The corrugated beam plate can be enabled to cross the drainage ditch by changing the length of the cantilever bracket, without changing the original drainage ditch structure.
[0026] The technical solution and structural advantages of this utility model are as follows:
[0027] 1. A cantilevered outward-extending corrugated beam guardrail structure, comprising a double-layer double-corrugated plate, a column, a cantilever bracket, etc. Figure 1 The upstream of the guardrail is the anchor end, and the downstream is connected to the standard section of the guardrail through a double-wave to triple-wave plate, as shown in Figures 2 to 3 Compared with ordinary corrugated beam guardrails, the column strength is lower and the cross beam strength is higher, achieving a strong beam and weak column and better protection performance.
[0028] 2. This guardrail is set at the drainage ditch on the side of the excavation section. The road surface height at the drainage ditch on the actual road is generally about 0 to 10 cm lower than the driving road surface. Figure 1 As shown in the figure, there is a risk of small passenger cars passing under the guardrail when they collide with the guardrail on the roadside drainage ditch. The bottom of the double-layer double-wave beam plate is lower than the ground than the ordinary wave beam guardrail, which can make up for the problem caused by the low road surface of the drainage ditch and is beneficial to the protection of small passenger cars.
[0029] 3. The corrugated beam guardrail in the old version of the specification is a double-wave plate, while the current specification uses a triple-wave plate. Therefore, during the process of upgrading and renovating the old road, many double-wave plates will be replaced and directly discarded, causing waste. This structure adopts a double-layer double-wave structure, which can reuse and recycle the double-wave plates.
[0030] 4. The columns are provided with reserved holes for heightening. Figure 1 After the road surface is repaved and reconstructed, the bracket can be installed in the reserved hole and continue to be used to improve the adaptability of the structure.
[0031] 5. The cross-section of the column is smaller than that of the ordinary corrugated beam guardrail column, saving materials.
[0032] 6. The cantilever bracket adopts a trapezoidal structure, such as Figure 1 The structure has high stability and can remain vertical to the column during a collision, so that the height of the corrugated beam plate increases as the column falls, which is beneficial to the protection of large vehicles.
[0033] The contents not described in detail in the utility model specification belong to the prior art known to the professional and technical personnel in the field. It is pointed out here that the above description is helpful for those skilled in the art to understand the invention, but it does not limit the protection scope of the invention. Any equivalent replacement, modification and / or simplification of the above description that does not deviate from the essence of the invention falls within the protection scope of the invention.
Claims
1. A cantilevered outward-extending double-layer double-corrugated beam guardrail structure, characterized in that: It comprises a column located outside the side ditch, the upper part of the column laterally extends a cantilever bracket to the inside of the side ditch, the lateral end of the cantilever bracket is connected to a vertical cylindrical connector, the lower half of the lateral end surface of the vertical cylindrical connector is connected to the lower double corrugated beam, and the upper half of the lateral end surface of the vertical cylindrical connector is connected to the upper double corrugated beam; The upper part of the column is provided with an array of heightened reserved holes to adapt to the corresponding increase in the height of the corrugated beam after the road surface is repaved and reconstructed; The upper double-corrugated beam and the lower double-corrugated beam are both double-corrugated beams that were replaced by three-corrugated beams during the old road upgrading and reconstruction process.
2. The cantilevered outward-extending double-layer double-corrugated beam guardrail structure according to claim 1 is characterized in that: The cantilever bracket includes a horizontal upper chord and a diagonal downward chord, the lower end of the diagonal downward chord is connected to the column, the higher end of the diagonal downward chord is connected to the lower half of the vertical cylindrical connector, one end of the horizontal upper chord is connected to the column, the other end of the horizontal upper chord is connected to the upper half of the vertical cylindrical connector, and vertical webs are distributed between the horizontal upper chord and the diagonal downward chord.
3. The cantilevered outward-extending double-layer double-corrugated beam guardrail structure according to claim 1 is characterized in that: One end of the upper double-corrugated beam close to the standard section of the guardrail is connected to the three-corrugated beam through a double-wave to three-wave plate, and the other end of the upper double-corrugated beam is provided with a circular end head protruding in accordance with the trend.
4. The cantilevered outward-extending double-layer double-corrugated beam guardrail structure according to claim 1 is characterized in that: The lower double corrugated beam is provided with a circular end head protruding in accordance with the trend at one end close to the standard section of the guardrail.
5. The cantilevered outward-extending double-layer double-corrugated beam guardrail structure according to claim 1 is characterized in that: The side ditch formed by the columns located on the outside of the side ditch spans the guardrail section from the end close to the standard section of the guardrail and expands outward at a slope of 1:
11.
6. The cantilevered outward-extending double-layer double-corrugated beam guardrail structure according to claim 1 is characterized in that: The side ditch spanning guardrail section formed by the columns located outside the side ditch is provided with two adjacent anchor columns starting from the end away from the standard section of the guardrail.