Temporary guardrail structure of expressway

Abstract

The utility model discloses a temporary guardrail structure of an expressway, which comprises a plurality of sections of concrete guardrails which are longitudinally arranged in a row, and the back surface of a head-on collision surface between two adjacent sections of concrete guardrails is fixedly connected by an upper corrugated plate and a lower corrugated plate. The fixed supporting component comprises a steel stand column and a flange plate, one end of the steel stand column is obliquely fixed to the back face of the concrete guardrail, the other end of the steel stand column is fixed to the upper surface of the flange plate, and the flange plate can be fixed to the road surface through anchor bolts. On the premise that the protection level meets the requirements of related specifications, the protective fence can be used as a temporary guardrail in the pass protection process in the reconstruction and extension process of the expressway, driving and construction safety is guaranteed, the protective fence can also be permanently used as a middle division belt guardrail after the reconstruction and extension project is finished, and the purposes of saving cost and shortening the project construction period are achieved.

Description

Technical Field

[0001] The utility model relates to the field of highway guardrail protection, and particularly relates to a temporary guardrail structure for expressways. Background Art

[0002] With the rapid development of China's comprehensive economy and highway traffic engineering, and the continuous growth of highway passenger and freight traffic volume, the construction scale and mileage of highway reconstruction and expansion projects are increasing. A large number of road traffic diversion guardrails are needed during the traffic maintenance construction of highway reconstruction and expansion projects. The process of expressway reconstruction and expansion takes a long time, the construction site is very complex, and construction is often carried out at night. Therefore, there are various hidden dangers during the reconstruction and expansion process. There are many participants in expressway reconstruction and expansion projects and the construction difficulty is great. Therefore, it is particularly important whether the traffic safety facilities are reasonably set up during expressway reconstruction and expansion construction.

[0003] In engineering, commonly used road cones, iron horse fences, isolation fences, color steel plates, water horse fences, etc. have different guardrail forms and functions. Safety road cones, iron horse fences, and isolation fences are mainly used for small-scale construction areas or traffic isolation, detour warning, and traffic guidance; color steel plates or PVC enclosures are mainly used for construction enclosures for dust and noise prevention on urban roads and buildings; after being filled with water or sand, the water horse fence weighs about 200 kg / m, and its self-gravity increases by about 10 times. Compared with other temporary guardrails, it has a certain buffering and elastic impact effect; however, the water horse fence is a hollow plastic shell with small stiffness, light weight, thin walls, and easy aging. Its wind resistance stability is poor before filling with water, it is easily deformed and broken by dragging during use, and once collided by a vehicle, it is easy to break and scatter, and its anti-collision ability is poor, only about 20 kJ / m 2 , and it is difficult to meet the protection level requirements of class III and class IV guardrails required for traffic maintenance construction in expressway reconstruction and expansion projects. If the water horse fence is used as a partition, once a collision occurs, it cannot completely protect the facilities and personnel safety at the traffic maintenance construction site of the reconstruction and expansion project; if the iron horse fence is used, it has the disadvantages of high cost and high deformation after collision.

[0004] According to the document of Sichuan Provincial Department of Transportation, Sichuan Transportation Letter

[2022] No. 469, "Notice on Further Standardizing the Installation of Median Guardrails in Expressway Construction Projects in Our Province", the median guardrail type of the integral subgrade of newly built, reconstructed (expanded) expressways in Sichuan Province shall generally adopt concrete guardrails, which are only used as permanent median guardrails; however, for the temporary guardrails in expressway reconstruction and expansion projects, it is necessary to ensure the personal safety of the construction site personnel. Therefore, higher safety requirements are imposed on them. Summary of the Utility Model

[0005] In view of the needs in the above field, the present invention provides a temporary guardrail structure for expressways, which can be used in expressway reconstruction and expansion construction projects, and can not only reduce the potential safety hazards of traffic on the traffic maintenance road, but also achieve the effects of shortening the construction period and reducing the construction cost.

[0006] Meanwhile, this kind of temporary guardrail structure for expressways can be used as a temporary roadside guardrail during the process of expressway reconstruction and expansion to ensure the driving safety and construction safety of the traffic maintenance section. Moreover, it can be permanently used as the median guardrail of the expressway after the reconstruction and expansion project is completed, achieving the purpose of cost saving and project duration shortening.

[0007] To achieve the above object, the present utility model provides the following technical solutions:

[0008] A temporary guardrail structure for expressways includes a plurality of concrete guardrails arranged longitudinally in a row. The back surface of the impact-facing side between two adjacent concrete guardrails is fixedly connected by upper and lower corrugated plates. It is characterized in that: the back surface further includes a fixed support member, and the fixed support member includes a steel column and a flange plate. One end of the steel column is obliquely fixed to the back surface of the concrete guardrail, and the other end is fixed to the upper surface of the flange plate. The flange plate can be fixed to the road surface through anchor bolts.

[0009] The corrugated plates fixedly connect two adjacent concrete guardrails through connecting bolts, and one end of the steel column is fixedly connected to the upper corrugated plate through splicing bolts.

[0010] There are four connecting bolt holes on the corrugated plate, located at the trough of the corrugated plate; there is one splicing bolt hole on the upper corrugated plate, located between the trough and the peak.

[0011] The corrugated plates fixedly connect two adjacent concrete guardrails together through connecting bolts passing through the connecting bolt holes; there is one splicing bolt hole at one end of the steel column, and the splicing bolt hole on the steel column is connected and fixed to the splicing bolt hole in the upper corrugated plate through a splicing bolt.

[0012] The steel column is a round pipe, and four reinforcing ribs are respectively fixed at a 90-degree angle at the other end of the steel column, and the reinforcing ribs are fixed to the upper surface of the flange plate.

[0013] The connection between the reinforcing ribs and the steel column and between the reinforcing ribs and the flange plate is a welded connection, and the surface layer of the reinforcing ribs has a galvanized coating.

[0014] The concrete guardrail is composed of precast long segments with a longitudinal length of 4m. The impact-facing side of the concrete guardrail is an F-shaped slope, and there are structural steel bars inside the concrete guardrail.

[0015] The longitudinal length of the corrugated plate is 30 - 50 cm, and the distance between the upper and lower corrugated plates is 50 - 80 cm.

[0016] The length of the steel column is 120 cm, and the surface layer has a galvanized coating.

[0017] The size of the flange is 30×30 cm, and the thickness is 2 - 3 cm. There are 4 rebar bolts holes on the flange, and the surface layer of the flange has a galvanized coating. When a number of flanges are fixed to the road surface, the longitudinal center line is consistent with the road forward direction.

[0018] The anchoring bolts are fixed to the road surface by pre - embedding or implanting rebars.

[0019] The temporary guardrail structure for expressways of the present utility model is improved on the basis of the existing concrete guardrail in the permanent central median. As a temporary guardrail, when in use, it is placed flat on the road surface and fixed to the road surface through the fixed support members on the back. The corrugated plates are used to connect between adjacent two - section concrete guardrails, which can prevent the concrete guardrails from spreading apart during collision. The separate fixed support members in this application are detachable. After the expressway reconstruction and expansion construction project is completed, the concrete guardrails can be removed and used as permanent guardrails installed in the central median of the expressway. Support blocks should be used inside the concrete guardrails to prevent displacement, and the connection of the concrete guardrails still uses corrugated plates to connect. When the temporary guardrail structure for expressways is used as a permanent guardrail, the corrugated plates, steel columns, and flanges need to be removed, and concrete mortar is poured into the original 4 rebar bolt holes of the flanges to restore the road surface. The concrete guardrails in the central median of the expressway also use corrugated plates to connect.

[0020] The corrugated plates can use newly built double - wave corrugated plates or the old double - wave guardrail plates of the existing corrugated beam guardrails removed during the expressway reconstruction and expansion. The steel columns can use newly built steel columns or the old steel columns of the existing corrugated beam guardrails removed during the expressway reconstruction and expansion.

[0021] The exposed length of the anchoring bolts should be controlled within 100 - 110 mm, and the exposed threaded part needs to be protected.

[0022] After adopting the above - mentioned technical solution, the present utility model has the following beneficial effects:

[0023] 1. During the expressway reconstruction and expansion process, it can be used as a temporary roadside guardrail during the traffic - maintaining process to ensure the driving safety and construction safety of the traffic - maintaining section.

[0024] 2. After the expressway reconstruction and expansion project is completed, it is used as a permanent guardrail in the expressway median to achieve the purpose of cost - saving and shortening the project duration.

[0025] 3. Materials such as corrugated plates and steel columns can use the corrugated plates and steel columns of the old corrugated beam guardrails removed during the expressway reconstruction and expansion project, achieving the effect of green and environmental protection. Description of the Drawings

[0026] Figure 1is a three-dimensional schematic diagram of the present utility model;

[0027] Figure 2 is a front view schematic diagram of the guardrail of the present utility model;

[0028] Figure 3 is a cross-sectional schematic diagram of the corrugated plate of the present utility model;

[0029] Figure 4 is a right view schematic diagram of the corrugated plate of the present utility model;

[0030] Figure 5 is a structural schematic diagram of the steel column of the present utility model;

[0031] Figure 6 is a connection schematic diagram between the flange plate and the steel column of the present utility model;

[0032] Figure 7 is an anchoring schematic diagram of the flange plate of the present utility model;

[0033] Figure 8 is a construction layout schematic diagram on the highway site of the present utility model;

[0034] Figure 9 is Figure 8 an enlarged view of the permanent guardrail 17 in

[0035] The reference numerals are listed as follows:

[0036] 1. Concrete guardrail; 2. Corrugated plate; 3. Connecting bolt; 4. Splicing bolt hole; 5. Steel column; 6. Flange plate; 7. Road surface; 8. Splicing bolt hole; 9. Connecting bolt hole; 10. Anchor bolt; 11. Reinforcing rib; 12. Opposite lane; 13. Permanent central median guardrail area; 14. Highway traffic safety area; 15. Roadside temporary guardrail area; 16. Construction area; 17. Permanent guardrail; 18. Roadside temporary guardrail; 19. Planting soil; 20 Support block; 21. Crib beam, 22 - Splicing bolt, 23 - Anchor bolt hole. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0038] Such as Figures 1-7As shown in the figure, the structure of the temporary guardrail for expressways of the present utility model includes several concrete guardrails 1 arranged longitudinally in a row. The back surface of the collision-facing side between two adjacent concrete guardrails 1 is fixedly connected by two corrugated plates 2, one on top and the other at the bottom. It is characterized in that: the back surface further includes a fixed support member, and the fixed support member includes a steel column 5 and a flange 6. One end of the steel column 1 is obliquely fixed to the back surface of the concrete guardrail 1, and the other end is fixed to the upper surface of the flange 6. The flange 6 can be fixed to the road surface 7 through anchor bolts 10.

[0039] The concrete guardrail 1 is composed of precast long segments with a longitudinal length of 4m. The collision-facing side of the concrete guardrail 1 should adopt an F-shaped slope surface, and structural steel bars should be designed inside the concrete guardrail 1.

[0040] The corrugated plate 2 has four connecting bolt holes 9. The corrugated plate 2 fixes and connects two adjacent concrete guardrails 1 together through connecting bolts 3 passing through the connecting bolt holes 9. There is also a splicing bolt hole 8 on the upper corrugated plate.

[0041] The length of the corrugated plate 2 is 30 - 50 cm. The corrugated plates 2 are arranged one above the other on the back of the concrete guardrail 1, and the vertical distance between the two corrugated plates 2 is 50 - 80 cm.

[0042] The steel column 5 is a round tube. One end of the steel column 5 has a splicing bolt hole 4. The splicing bolt hole 4 on the steel column is fixedly connected to the splicing bolt hole 8 in the upper corrugated plate 2 through a splicing bolt 22. Four reinforcing ribs 11 are welded at a 90-degree angle at the other end, and the reinforcing ribs 11 are also fixedly connected to the upper surface of the flange 6 by welding. The length of the steel column 5 is 120 cm, and its surface has a galvanized coating. The surface of the reinforcing ribs has a galvanized coating.

[0043] The size of the flange 6 is 30×30 cm, and its thickness is 2 - 3 cm. The surface of the flange has a galvanized coating. There are 4 rebar anchor bolt holes on the flange. The anchor bolts 10 are fixed to the road surface by embedding or implanting rebars. The flange 6 can be fixed to the road surface through the anchor bolts 10 passing through the anchor bolt holes 23. When multiple flanges 6 are fixed to the road surface, their longitudinal centerlines are consistent with the direction of the road ahead.

[0044] Figure 8 It is a schematic diagram of the on-site construction layout of the present utility model on an expressway; when an expressway is being reconstructed or expanded, the entire road surface 7 includes the oncoming lane 12, the permanent central median guardrail area 13, the expressway traffic maintenance area 14, the roadside temporary guardrail area 15, and the construction area 16.

[0045] When the utility model is used as a temporary guardrail 18 to ensure the construction safety of the construction area 16 and the driving safety of vehicle drivers in the highway traffic maintenance area 14, it is placed in the temporary guardrail area 15 on the roadside of the highway. During installation, the exposed length of the anchor bolt should be controlled within 100-110 mm, and the exposed threaded part needs to be protected.

[0046] After the highway construction is completed, when part of the structure of the utility model is used as a permanent guardrail 17 to ensure the driving safety of vehicle drivers on both the left and right lanes of the reconstructed and expanded highway, it is placed in the permanent central median guardrail area 13 of the highway.

[0047] Figure 9 Yes Figure 8 It is an enlarged view of the permanent guardrail 17 in ; after the fixed support member of the utility model is removed, it can be used in the permanent central median guardrail area. In the center of the highway pavement 7, there are two rows of concrete guardrails 1. In the same row, adjacent concrete guardrails 1 are still connected by corrugated plates 2 through connecting bolts 3. The anti-collision surfaces of the two rows of concrete guardrails 1 face outwards. Support blocks 20 should be used on the inner sides of the two rows to prevent displacement. Planting soil 19 is attached on it, and a green belt can be made. A sleeper beam 21 should be placed under the concrete guardrail 1 to prevent tilting.

[0048] This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A temporary guardrail structure for a highway, comprising a plurality of concrete guardrail sections arranged in a row longitudinally, wherein the back of the collision surface between two adjacent concrete guardrail sections is fixedly connected by upper and lower corrugated plates, characterized in that: The back side also includes a fixed support component, which includes a steel column and a flange. One end of the steel column is obliquely fixed to the back side of the concrete guardrail, and the other end is fixed to the upper surface of the flange. The flange can be fixed to the road surface by anchor bolts.

2. The temporary highway guardrail structure according to claim 1 is characterized by: The corrugated plate is fixedly connected to two adjacent sections of concrete guardrails by connecting bolts, and one end of the steel column is fixed to the upper corrugated plate by splicing bolts.

3. The temporary highway guardrail structure according to claim 2 is characterized in that: There are four connecting bolt holes on the corrugated plate, located in the troughs of the corrugated plate; there is a splicing bolt hole on the upper corrugated plate, located between the trough and the crest.

4. The temporary highway guardrail structure according to claim 3 is characterized in that: The corrugated plate is fixedly connected together with two adjacent sections of concrete guardrails by connecting bolts passing through the connecting bolt holes; one end of the steel column is provided with a splicing bolt hole, and the splicing bolt hole on the steel column is connected and fixed with the splicing bolt hole in the upper corrugated plate by splicing bolts.

5. The temporary highway guardrail structure according to claim 1 is characterized in that: The steel column is a round tube, and four reinforcing ribs are fixed at the other end of the steel column at 90 degrees, and the reinforcing ribs are fixed to the upper surface of the flange.

6. The temporary highway guardrail structure according to claim 5 is characterized by: The reinforcing ribs are connected to the steel columns and to the flanges by welding, and the surfaces of the reinforcing ribs are provided with a galvanized coating.

7. The temporary highway guardrail structure according to claim 1 is characterized by: The concrete guardrail is composed of prefabricated long sections of 4 meters in the longitudinal direction. The impact surface of the concrete guardrail is an F-shaped slope surface, and there are structural steel bars inside the concrete guardrail.

8. The temporary highway guardrail structure according to claim 1 is characterized by: The longitudinal length of the corrugated plate is 30-50 cm, and the distance between the upper and lower corrugated plates is 50-80 cm.

9. The temporary highway guardrail structure according to claim 1, characterized in that: The steel column is 120 cm long and has a galvanized coating on the surface.

10. The temporary highway guardrail structure according to claim 1, characterized in that: The flange has a size of 30×30cm and a thickness of 2-3cm. There are 4 anchor bolt holes on the flange. The surface of the flange is galvanized. When several flanges are fixed to the road surface, the longitudinal center line is consistent with the direction of the road.

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