Permanent and temporary combined concrete guardrail

Abstract

The utility model relates to the field of road guardrails, in particular to a permanent and temporary combined concrete guardrail which comprises a plurality of concrete prefabricated units, the plurality of concrete prefabricated units are longitudinally connected in series through longitudinal connecting components, or the concrete prefabricated units are transversely connected in parallel in a back-to-back mode through transverse connecting components. Or serial connection is achieved through the longitudinal connecting components, back-to-back staggered parallel connection is achieved through the transverse connecting components, and the device is used for effectively isolating, preventing collision and guiding vehicles running in the opposite directions. Wherein during back-to-back staggered parallel connection, the end faces of the adjacent concrete prefabricated units are aligned with the center line of the back concrete prefabricated unit, so that dislocation of half of the concrete prefabricated units exists between the adjacent concrete prefabricated units. According to the utility model, the concrete prefabricated units can be connected in series and in parallel in a back-to-back manner according to the required length, so that vehicles running in opposite directions can be effectively isolated, prevented from collision and guided. Anchoring is not needed during temporary protection, moving is convenient, and repeated use can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of highway guardrails, in particular to a permanent and temporary combined concrete guardrail. Background Art

[0002] To build a modern, high-quality, integrated, three-dimensional transportation network, the total number of highway reconstruction and expansion projects has been increasing year by year. Expressway reconstruction and expansion projects should include necessary temporary safety, service, and management facilities. Temporary transportation projects and facilities along the route should be designed for versatility and reusability, and should be easy to dismantle and relocate.

[0003] According to Chapter 9 of the "Design Specifications for Highway Reconstruction and Expansion Traffic Engineering and Facilities Alongside" (JTG / TL80-2014), when the vehicle speed on the road is maintained at 60 km / h or above, temporary isolation facilities should include continuously interlocking precast concrete guardrail blocks, continuously interlocking water barriers filled with water (or sand), and corrugated beam guardrails. However, in practice, the protective capacity of water barriers is insufficient, and corrugated beam guardrails are not mobile.

[0004] At present, some mobile steel guardrail products with anti-collision grade reaching level three (A) have been used to renovate and expand temporary guardrails. However, after the renovation and expansion construction is completed, the mobile steel guardrails can no longer be used in large quantities on the highway, resulting in great waste. Utility Model Content

[0005] In response to the above problems, the purpose of this utility model is to provide a permanent and temporary combined concrete guardrail to solve the problem that the temporary isolation and protection facilities in the existing renovation and expansion construction have insufficient protection capabilities and cannot be used on the highway after renovation and expansion.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A permanent and temporary combined concrete guardrail comprises a plurality of precast concrete units, wherein the precast concrete units are connected in series longitudinally via longitudinal connecting members, or are connected in parallel transversely back to back via transverse connecting members, or are connected in series via longitudinal connecting members and in staggered back to back parallel via transverse connecting members, for effectively isolating, preventing collisions and guiding vehicles travelling in opposite directions;

[0008] When the precast concrete units are connected in parallel back to back, the end faces of the adjacent precast concrete units are aligned with the center lines of the precast concrete units at the rear, so that there is a misalignment of half a precast concrete unit between the adjacent precast concrete units.

[0009] As described above, precast concrete units can be connected in series or back-to-back in parallel according to the required length, effectively isolating, preventing collisions, and guiding vehicles traveling in opposite directions. Precast concrete units can be connected in series to form separate concrete barriers, or back-to-back in parallel to form a monolithic concrete barrier. This utility model requires no anchoring for temporary protection, is easily removable, and is reusable. After removing the transverse connecting members, the longitudinally connected precast concrete units can be used to form separate concrete barriers in highway medians.

[0010] Optionally, the prefabricated concrete unit includes a prefabricated guardrail wall, the prefabricated guardrail wall is provided with a steel cage, and the steel cage is provided with a plurality of horizontally distributed main bars.

[0011] Furthermore, the lower part of the guardrail prefabricated wall in the vehicle-facing direction is provided with a climbing sill, the middle part is provided with a collision surface, and the upper part is provided with a climbing-blocking sill.

[0012] Furthermore, the prefabricated wall of the guardrail is provided with a through oblong hole, and a trapezoidal reserved groove is also reserved on the wall surface of the prefabricated wall of the guardrail facing the vehicle oncoming direction and at the end of the oblong hole.

[0013] Optionally, the longitudinal connecting member includes an embedded steel casing and a force transfer rod, and the embedded steel casing is embedded in the prefabricated wall of the guardrail and connected to the steel cage, and is used to longitudinally connect the prefabricated concrete units through the embedded steel casing and the force transfer rod.

[0014] Optionally, the transverse connecting members include connecting bolts and steel plates, and are used to connect the prefabricated concrete units transversely via the connecting bolts and the steel plates.

[0015] Furthermore, the prefabricated wall of the guardrail is provided with a lifting ring groove, and a lifting ring is provided in the lifting ring groove.

[0016] Furthermore, a rectangular drainage hole is provided at the bottom of the prefabricated guardrail wall.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are:

[0018] 1. A unified design scheme for temporary guardrails in construction areas and permanent highway guardrails allows for the reuse of guardrail structures and reduces resource waste. This is particularly true in highway reconstruction and expansion projects, where temporary guardrails are initially used and then later relocated to the central median for use as discrete concrete guardrails, reducing the cost of temporary guardrails.

[0019] 2. Modular design, can be connected in series and parallel according to the required length, has a variety of application scenarios, can be used to separate oncoming traffic, can also be used as roadside guardrails.

[0020] 3. Excellent anti-collision capability. When used as a temporary guardrail, the guardrails are placed back-to-back, have a relatively high deadweight, and are expected to have minimal lateral displacement, making the likelihood of vehicles crossing them relatively low. The anti-collision capability is expected to reach Level 4 (SBm). When used as a concrete guardrail installed in a central median, the anti-collision capability reaches Level 5 (SAm). This safety meets the evaluation standards and can be mass-produced in factories.

[0021] 4. The appearance is beautiful, and the collision surface and other shapes are similar to the F-type reinforced guardrail in the specifications, which is easier for the public to accept.

[0022] 5. It is easy to move, has a thin-walled appearance, and the weight of each unit is relatively smaller than that of the concrete guardrail unit in the specification. It is connected horizontally with bolts and can be hoisted through the lower drainage holes and the reserved lifting rings on the back.

[0023] 6. The universal prefabricated concrete prefabricated unit adopts the connection method of longitudinal connecting components and transverse connecting components, which is convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is the front view of the utility model;

[0026] Figure 2 This is a top view of the utility model;

[0027] Figure 3 This is a cross-sectional view of the longitudinal connection of the utility model;

[0028] Figure 4 This is a cross-sectional view of the transverse connection of the utility model;

[0029] Figure 5 It is a schematic diagram of the lifting ring of the utility model.

[0030] In the figure: 1. Prefabricated wall of guardrail; 2. Embedded steel casing; 3. Force transmission rod; 4. Connecting bolt; 5. Steel pad; 6. Drainage hole; 7. Oblong hole; 8. Lifting ring groove; 9. Lifting ring; 10. Climbing step; 11. Impact surface; 12. Anti-climbing step. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] A permanent and temporary combined concrete guardrail, such as Figure 1-Figure 5 As shown, it includes several precast concrete units, longitudinal connecting members, and transverse connecting members. The longitudinal connecting members can connect two precast concrete units longitudinally, and the transverse connecting members can connect two precast concrete units back to back transversely. The precast concrete unit is a thin-walled concrete guardrail, including a precast guardrail wall 1. A steel cage is provided inside the precast guardrail wall 1. The steel cage is provided with multiple horizontally distributed main bars. The precast guardrail wall 1 is provided with a climbing sill 10 at the lower part in the vehicle-facing direction, a collision surface 11 in the middle part, and an anti-climbing sill 12 at the upper part, which can effectively dissipate energy when a vehicle collides and prevent the vehicle from passing through. The precast guardrail wall 1 is provided with a through oblong hole 7. A trapezoidal reserved groove is also reserved on the wall surface of the precast guardrail wall 1 facing the vehicle-facing direction and at the end of the oblong hole 7.

[0033] More specifically, the longitudinal connecting member includes a pre-embedded steel casing 2 and a force transfer rod 3. The pre-embedded steel casing 2 is embedded in the precast guardrail wall 1 and connected to the steel cage. The force transfer rod 3 is inserted into the pre-embedded steel casing 2 to connect two adjacent precast concrete units in series. The longitudinal connecting member can ensure the integrity of the force between the precast concrete units in the event of a collision. There is no need to weld between the force transfer rod 3 and the pre-embedded steel casing 2, making it easy to dismantle. The transverse connecting member includes a connecting bolt 4 and a steel pad 5. The connecting bolt 4 is inserted into the reserved oblong hole 7 and the trapezoidal reserved groove and then inserted into the steel pad 5 to connect the two precast concrete units back to back in parallel. The trapezoidal reserved groove can prevent the connecting bolt from protruding from the collision surface of the precast concrete unit. The connection method of the connecting bolt facilitates the dismantling of the precast concrete units. These connection methods are all movable connections and can be reused.

[0034] In the present invention, the lifting ring groove 8 is hidden on the back of the guardrail prefabricated wall 1, and a lifting ring 9 is provided in the lifting ring groove 8. The lifting ring groove 8 is hidden on the back of the guardrail prefabricated wall 1, which is convenient for lifting the guardrail prefabricated wall 1 after it is completed, does not affect the guardrail collision surface, and can avoid gaps when the guardrail prefabricated walls 1 are connected back to back in parallel.

[0035] In the present invention, a rectangular drainage hole 6 is provided at the bottom of the prefabricated wall 1 of the guardrail, which can effectively drain water when the temporary guardrail is in use, thereby preventing accidents caused by water accumulation on the road.

[0036] Example 1

[0037] Several precast concrete units can be connected in series or in a back-to-back staggered parallel arrangement, depending on the required length, to effectively isolate, prevent collisions, and guide vehicles traveling in opposite directions. When staggered back-to-back, the end faces of adjacent precast concrete units are aligned with the centerline of the precast concrete unit behind them, creating a half-unit offset between adjacent precast concrete units. This prevents excessive stress on the longitudinal connecting members during a collision.

[0038] The weight of a single precast concrete unit is relatively small, making it easy to move. Its weight increases when connected in series, and further increases when connected in parallel due to its own weight and the friction between the bottom and the road surface, making it more stable in the event of a vehicle collision. When connected back to back in parallel, its own weight increases further, effectively protecting the target traffic.

[0039] When used as a temporary guardrail, it does not require anchoring and can be placed directly on a flat road surface. Its own weight ensures the overall stability of the guardrail while avoiding damage to the roadbed and pavement. It can be moved relatively quickly at traffic transfer nodes.

[0040] Example 2

[0041] After being used as a temporary guardrail for the expansion and reconstruction of the work area, the utility model can be transformed into a concrete guardrail for use on highways through certain procedures:

[0042] The longitudinal and transverse connecting members can be removed, and the precast concrete units hoisted into the newly constructed central median. After reconnecting the precast concrete units to the longitudinal connecting members, they can be used as separate concrete barriers for the central median, achieving a crashworthiness rating of SAM (Level 5). For narrower medians, precast concrete units can be connected back-to-back in parallel using transverse connecting members to form a monolithic central median concrete barrier.

[0043] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A permanent and temporary combined concrete guardrail, characterized in that: The system comprises a plurality of precast concrete units, wherein the plurality of precast concrete units are connected in series longitudinally via longitudinal connecting members, or are connected in parallel transversely back to back via transverse connecting members, or are connected in series via longitudinal connecting members and in staggered back to back parallel via transverse connecting members, so as to effectively isolate, prevent collisions and guide vehicles travelling in opposite directions; When the precast concrete units are connected in parallel back to back, the end faces of the adjacent precast concrete units are aligned with the center lines of the precast concrete units at the rear, so that there is a misalignment of half a precast concrete unit between the adjacent precast concrete units.

2. The permanent and temporary combined concrete guardrail according to claim 1 is characterized in that: The prefabricated concrete unit includes a prefabricated guardrail wall, the prefabricated guardrail wall is provided with a steel cage, and the steel cage is provided with a plurality of horizontally distributed main bars.

3. The permanent and temporary combined concrete guardrail according to claim 2 is characterized in that: The lower part of the prefabricated wall of the guardrail in the vehicle-facing direction is provided with a climbing sill, the middle part is provided with a collision surface, and the upper part is provided with a climbing-blocking sill.

4. The permanent and temporary combined concrete guardrail according to claim 3 is characterized in that: The guardrail prefabricated wall is pre-set with a through oblong hole, and a trapezoidal pre-set groove is also pre-set on the wall surface of the guardrail prefabricated wall facing the vehicle oncoming direction and at the end of the oblong hole.

5. The permanent and temporary combined concrete guardrail according to claim 2 is characterized in that: The longitudinal connecting member includes a pre-embedded steel sleeve and a force transfer rod. The pre-embedded steel sleeve is embedded in the prefabricated guardrail wall and connected to the steel cage, and is used to longitudinally connect the prefabricated concrete units through the pre-embedded steel sleeve and the force transfer rod.

6. The permanent and temporary combined concrete guardrail according to claim 2 is characterized in that: The transverse connecting members include connecting bolts and steel plates, and are used to connect the prefabricated concrete units transversely via the connecting bolts and the steel plates.

7. The permanent and temporary combined concrete guardrail according to claim 2 is characterized in that: The prefabricated wall of the guardrail is provided with a lifting ring groove, and a lifting ring is provided in the lifting ring groove.

8. The permanent and temporary combined concrete guardrail according to claim 2 is characterized in that: A rectangular drainage hole is provided at the bottom of the prefabricated wall of the guardrail.

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