A combined assembly type guardrail structure

Abstract

This utility model discloses a modular, assembled guardrail structure, including precast concrete walls, pre-reserved anchor bars, longitudinal connectors, and a steel structure. The precast concrete walls are segments formed by precast reinforced concrete. A post-cast strip is provided at the bottom of each precast concrete wall, and a grouting hole is provided at the top of each precast concrete wall, with the bottom of the grouting hole communicating with the top of the post-cast strip. Pre-reserved anchor bars are installed within the post-cast strip, staggered with the pre-embedded reinforcing bars in the foundation. The precast concrete walls are connected by longitudinal connectors. A cast-in-place layer and an asphalt pavement layer are provided on the front side of each precast concrete wall. The steel structure is a rectangular box with a single-sided opening. The steel structure has one row of horizontal ribs and multiple rows of vertical ribs inside. Connectors are provided at the bottom of the steel structure, and pre-reserved sleeves are provided at the top of the precast concrete walls. The steel structure is connected to the precast concrete walls via connectors and pre-reserved sleeves. This invention has pre-maintenance and upgrade capabilities.

Description

Technical Field

[0001] This utility model belongs to the field of traffic safety protection, and specifically relates to a modular, assembled guardrail structure. Background Technology

[0002] In modern transportation systems, the importance of road safety facilities is self-evident, and guardrails, as a crucial component, directly relate to the safety of life and property of vehicles and pedestrians. In recent years, road surface elevation has become increasingly common. On the one hand, with the acceleration of urbanization, urban roads need continuous upgrading and reconstruction to adapt to the ever-increasing traffic demands. In this process, to optimize the road's longitudinal profile, improve drainage capacity, or meet the connection requirements with other traffic facilities, the road surface is often raised. On the other hand, in some mountainous or terrain-complex areas, elevated road surfaces are also adopted in the design of newly constructed roads to overcome terrain elevation differences and ensure driving safety and smooth traffic flow.

[0003] However, existing concrete guardrails have revealed a significant problem of insufficient protective height when faced with road surface increases. Concrete guardrails, due to their robust structure and relatively low cost, were widely used in past road construction. But when roads are raised, the height of concrete guardrails that previously met protective standards no longer satisfies the new safety requirements. If a vehicle accidentally veers off course and collides with a guardrail with insufficient protective height, it is highly likely to break through the guardrail, causing serious traffic accidents such as overturning or veering into oncoming lanes, posing a significant threat to the lives of drivers and passengers, and resulting in severe property damage.

[0004] Against this backdrop, the development of a new type of guardrail with both maintenance and repair functions is urgently needed. Modular guardrails have emerged to address this need, designed to accommodate both new road construction and existing road renovation. For new roads, modular guardrails can be optimized from the design stage, fully considering potential future road surface changes to ensure reliable protection under these circumstances. For existing road renovations, modular guardrails cleverly utilize existing concrete guardrail foundations, increasing protective height and optimizing performance by adding or adjusting structural components, thus avoiding the high costs and prolonged traffic disruption associated with large-scale demolition and reconstruction. This innovative design approach provides a practical solution to the current challenges facing road guardrails, possessing significant practical value and broad application prospects. Utility Model Content

[0005] The purpose of this utility model is to provide a modular, assembled guardrail structure to solve the problem of insufficient height of concrete guardrails after road overlay.

[0006] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0007] A modular, prefabricated guardrail structure includes precast concrete walls, pre-reserved anchor bars, longitudinal connectors, and a steel structure. The precast concrete walls are segments formed by precast reinforced concrete. A post-cast strip is provided at the bottom of each precast concrete wall, and a grouting hole is provided at the top of each precast concrete wall, with the bottom of the grouting hole communicating with the top of the post-cast strip. Pre-reserved anchor bars are installed within the post-cast strip, staggered with pre-embedded reinforcing bars in the foundation. The precast concrete walls are connected by longitudinal connectors. A cast-in-place layer and an asphalt pavement layer are provided on the front side of each precast concrete wall. The steel structure is a rectangular box with an opening on one side, and a row of horizontal ribs and multiple rows of vertical ribs are provided inside the steel structure. Connectors are provided at the bottom of the steel structure, and pre-reserved sleeves are provided at the top of the precast concrete walls. The steel structure is connected to the precast concrete walls via connectors and pre-reserved sleeves.

[0008] Furthermore, the longitudinal connecting member is in the form of a channel steel connection or a bolt connection. When the longitudinal connecting member is in the form of a channel steel connection, it includes a channel steel component, embedded bolts, and a U-shaped channel steel. The channel steel component and the embedded bolts are set at both ends of the top of the precast concrete wall. The U-shaped channel steel is placed in the channel steel component between the precast concrete walls and bolted to the embedded bolts. When the longitudinal connecting member is in the form of a bolt connection, it includes a rectangular tube and assembly bolts. The rectangular tube has bolt holes in the cross-sectional direction of the guardrail. The rectangular tube is embedded at both ends of the top of the precast concrete wall. The precast concrete walls are bolted together by assembly bolts.

[0009] Furthermore, the reserved sleeve installed at the top of the precast concrete wall needs to be used in conjunction with the connector installed at the bottom of the steel structure. When the reserved sleeve is a sleeve with threads on the inner surface, the connector has threads on the outer surface, and the reserved sleeve and the connector are connected by threaded engagement. When the reserved sleeve is a sleeve, the connector has a circular cross-sectional shape and is inserted into the reserved sleeve for anchoring with cement mortar.

[0010] Furthermore, the top of the reserved sleeve is flush with the top of the precast concrete wall, and the bottom surface of the steel structure coincides with the top surface of the precast concrete wall.

[0011] Furthermore, the inner diameter of the opening end on one side of the steel structure is larger than the outer diameter on the other side, and the steel structures overlap longitudinally with an overlap length ≥ 100 mm.

[0012] Furthermore, the reserved anchor bars are spaced out within the post-pouring strip, and the foundation is longitudinally spaced with embedded steel bars. The cross-sectional shape of the embedded steel bars is the same as that of the post-pouring strip. The embedded steel bars are staggered with the reserved anchor bars in the post-pouring strip and then inserted into the longitudinal bars. The precast concrete wall and foundation are filled by pouring concrete into the post-pouring strip through the grouting holes.

[0013] Furthermore, the rectangular tube is a box that is wider at the top and narrower at the bottom with an opening on the top surface. The rectangular tube has splicing bolt holes on its side. The channel steel component is a rectangular box with openings on the top and sides. Both the channel steel component and the rectangular tube have lifting rings inside. The sides and bottom of the channel steel component and the rectangular tube are welded with anchor bars to connect with the structural bars in the precast concrete wall.

[0014] Furthermore, the front slope of the precast concrete wall includes F-shaped slope, reinforced slope, and single slope.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects:

[0016] (1) It has pre-maintenance and renovation and upgrading functions, which is beneficial to later maintenance;

[0017] (2) It has a high safety reserve, meets the protection level requirements, and better maintains the safety of highway operation. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model patent, the drawings used in the embodiments will be briefly described below:

[0019] Figure 1 This is an example of an elevation view of Embodiment 1 of this utility model;

[0020] Figure 2 This is an example of a cross-sectional view of Embodiment 1 of this utility model;

[0021] Figure 3 This is an example of a perspective view of Embodiment 1 of the present utility model;

[0022] Figure 4 This is an example of a three-dimensional view of a precast concrete wall in Embodiment 1 of this utility model;

[0023] Figure 5 This is an example of a three-dimensional view of the steel structure in Embodiment 1 of this utility model;

[0024] Figure 6 This is an example of a three-dimensional view of a channel steel component according to Embodiment 1 of this utility model;

[0025] Figure 7 This is an example of an elevation view of Embodiment 2 of this utility model;

[0026] Figure 8 This is an example of a cross-sectional view of Embodiment 2 of this utility model;

[0027] Figure 9 This is an example of a perspective view of Embodiment 2 of the present utility model;

[0028] Figure 10 This is an example of a rectangular tube diagram for Embodiment 2 of this utility model.

[0029] Figure Labels

[0030] 1. Precast concrete wall; 2. Reserved anchor bars; 3. Post-cast strip; 4. Grouting hole; 5. Foundation; 6. Reserved sleeve; 7. Connector; 8. Cast-in-place layer; 9. Asphalt pavement layer; 10. Channel steel component; 11. Embedded bolt; 12. U-shaped channel steel; 13. Rectangular tube; 14. Assembly bolt; 15. Horizontal rib; 16. Vertical rib; 17. Splicing bolt hole; 18. Lifting ring; 19. Embedded steel bar; 20. Longitudinal reinforcement. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to embodiments and specific implementation methods. However, this should not be construed as limiting the scope of the present invention to the following embodiments; any technology implemented based on the content of the present invention falls within the scope of the present invention.

[0032] like Figure 1-4 The figures shown are elevation, cross-sectional, perspective, and perspective view of a precast concrete wall, representing Embodiment 1 of this utility model. A modular, assembled guardrail structure includes a precast concrete wall 1, pre-cast anchor bars 2, longitudinal connectors, and a steel structure. The precast concrete wall 1 is a segment formed by precast reinforced concrete. A post-cast strip 3 is provided at the bottom of the precast concrete wall 1, and a grouting hole 4 is provided at the top of the precast concrete wall 1. The bottom of the grouting hole 4 is connected to the top of the post-cast strip 3, and pre-cast anchor bars are provided within the post-cast strip 3. 2 is staggered with the pre-embedded steel bars 19 in the foundation 5. The precast concrete walls 1 are connected by longitudinal connectors. The front side of the precast concrete wall 1 is provided with a cast-in-place layer 8 and an asphalt pavement layer 9. The steel structure is a rectangular box with one side opening. The steel structure is provided with a row of horizontal ribs 15 and multiple rows of vertical ribs 16. The bottom of the steel structure is provided with connectors 7. The top of the precast concrete wall 1 is provided with a reserved sleeve 6. The steel structure and the precast concrete wall 1 are connected by connectors 7 and reserved sleeves 6.

[0033] The longitudinal connecting member is a channel steel connection, including a channel steel component 10, a pre-embedded bolt 11, and a U-shaped channel steel 12. The channel steel component 10 and the pre-embedded bolt 11 are set at both ends of the top of the precast concrete wall 1. The U-shaped channel steel 12 is respectively placed into the channel steel component 10 between the precast concrete walls 1 and bolted to the pre-embedded bolt 11.

[0034] The reserved sleeve 6 set at the top of the precast concrete wall 1 needs to be used in conjunction with the connector 7 set at the bottom of the steel structure. When the reserved sleeve 6 is a sleeve, the cross-sectional shape of the connector 7 is a circular pipe. The connector 7 is inserted into the reserved sleeve 6 and anchored by cement mortar.

[0035] The reserved sleeve 6 is embedded in the top of the precast concrete wall 1, and the bottom surface of the steel structure coincides with the top surface of the precast concrete wall 1.

[0036] like Figure 5 The figure shown is a perspective view of the steel structure of Embodiment 1 of this utility model. The inner diameter of the opening end on one side of the steel structure is larger than the outer diameter on the other side. The steel structures overlap longitudinally, and the length of the overlap area is ≥100mm.

[0037] The reserved anchor bars 2 are spaced out in the post-pouring strip 3. The foundation 3 is longitudinally spaced with embedded steel bars 19. The cross-sectional shape of the embedded steel bars 19 is the same as that of the post-pouring strip 3. The embedded steel bars 19 are staggered with the reserved anchor bars 2 in the post-pouring strip 3 and then inserted into the longitudinal bars 20. The precast concrete wall 1 and the foundation 5 are filled with concrete by pouring concrete into the post-pouring strip 3 through the grouting hole 4.

[0038] like Figure 6 The figure shown is a perspective view of the channel steel component 10 of the present invention. The channel steel component 10 is a rectangular box with openings on the top and sides. The channel steel component 10 is provided with a lifting ring 18 inside. The side and bottom surfaces of the channel steel component 10 are welded with anchor bars and connected to the structural bars in the precast concrete wall 1.

[0039] The front slope of the precast concrete wall 1 is a reinforced slope.

[0040] like Figure 7-9 The figures shown are elevation, cross-sectional, and perspective views of Embodiment 1 of this utility model, illustrating a modular, assembled guardrail structure. The structure includes a precast concrete wall 1, pre-cast anchor bars 2, longitudinal connectors, and a steel structure. The precast concrete wall 1 is a segment formed by precast reinforced concrete. A post-cast strip 3 is provided at the bottom of the precast concrete wall 1, and a grouting hole 4 is provided at the top of the precast concrete wall 1. The bottom of the grouting hole 4 is connected to the top of the post-cast strip 3. Pre-cast anchor bars 2 are installed within the post-cast strip 3, connecting to the foundation 5. The pre-embedded steel bars 19 are staggered. The precast concrete walls 1 are connected by longitudinal connectors. The front side of the precast concrete wall 1 is provided with a cast-in-place layer 8 and an asphalt pavement layer 9. The steel structure is a rectangular box with one side opening. The steel structure is provided with a row of horizontal ribs 15 and multiple rows of vertical ribs 16. The bottom of the steel structure is provided with connectors 7. The top of the precast concrete wall 1 is provided with a reserved sleeve 6. The steel structure and the precast concrete wall 1 are connected by connectors 7 and reserved sleeves 6.

[0041] The longitudinal connector is a bolted connection, including a rectangular tube 13 and assembly bolts 14. The rectangular tube 13 has bolt holes in the cross-sectional direction of the guardrail. The rectangular tube 13 is embedded at both ends of the top of the precast concrete wall 1. The precast concrete walls 1 are bolted together by the assembly bolts 14.

[0042] The pre-reserved sleeve 6 set at the top of the precast concrete wall 1 needs to be used in conjunction with the connector 7 set at the bottom of the steel structure. When the steel pipe 6 is a sleeve with threads on the inner surface, the outer surface of the connector 7 is threaded, and the steel pipe 6 and the connector 7 are connected by threaded engagement.

[0043] The reserved sleeve 6 is embedded in the top of the precast concrete wall 1, and the bottom surface of the steel structure coincides with the top surface of the precast concrete wall 1.

[0044] The inner diameter of the opening on one side of the steel structure is larger than the outer diameter on the other side, and the steel structures overlap longitudinally with an overlap length ≥ 100mm.

[0045] The reserved anchor bars 2 are spaced out in the post-pouring strip 3. The foundation 3 is longitudinally spaced with embedded steel bars 19. The cross-sectional shape of the embedded steel bars 19 is the same as that of the post-pouring strip 3. The embedded steel bars 19 are staggered with the reserved anchor bars 2 in the post-pouring strip 3 and then inserted into the longitudinal bars 20. The precast concrete wall 1 and the foundation 5 are filled with concrete by pouring concrete into the post-pouring strip 3 through the grouting hole 4.

[0046] like Figure 10 The figure shown is a perspective view of the rectangular tube of Embodiment 1 of this utility model. The rectangular tube 13 is a box that is wider at the top and narrower at the bottom and has an opening on the top surface. The rectangular tube 13 has splicing bolt holes 17 on its side surface and a lifting ring 18 inside. The rectangular tube 13 has anchor bars welded to its side and bottom surface and connected to the structural bars in the precast concrete wall 1.

[0047] The front slope of the precast concrete wall 1 includes an F-shaped slope.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular, assembled guardrail structure, comprising a precast concrete wall (1), pre-reserved anchor bars (2), longitudinal connectors, and a steel structure, characterized in that: The precast concrete wall (1) is a segment formed by precast reinforced concrete. The bottom of the precast concrete wall (1) is provided with a post-cast strip (3). The top of the precast concrete wall (1) is provided with a grouting hole (4). The bottom of the grouting hole (4) is connected to the top of the post-cast strip (3). The post-cast strip (3) is provided with a reserved anchor bar (2) which is staggered with the embedded steel bar (19) in the foundation (5). The precast concrete walls (1) are connected by longitudinal connectors. The front side of the precast concrete wall (1) is provided with a cast-in-place layer (8) and an asphalt pavement layer (9). The steel structure is a rectangular box with a single-sided opening. The steel structure is provided with a row of horizontal ribs (15) and multiple rows of vertical ribs (16). The bottom of the steel structure is provided with a connector (7). The top of the precast concrete wall (1) is provided with a reserved sleeve (6). The steel structure is connected to the precast concrete wall (1) through the connector (7) and the reserved sleeve (6).

2. The modular, assembled guardrail structure according to claim 1, characterized in that: The longitudinal connecting member is a channel steel connection or a bolt connection. When the longitudinal connecting member is a channel steel connection, it includes a channel steel component (10), a pre-embedded bolt (11), and a U-shaped channel steel (12). The channel steel component (10) and the pre-embedded bolt (11) are set at both ends of the top of the precast concrete wall (1). The U-shaped channel steel (12) is placed in the channel steel component (10) between the precast concrete walls (1) and bolted to the pre-embedded bolt (11). When the longitudinal connecting member is a bolt connection, it includes a rectangular tube (13) and an assembly bolt (14). The rectangular tube (13) has bolt holes in the direction of the guardrail section. The rectangular tube (13) is pre-embedded at both ends of the top of the precast concrete wall (1). The precast concrete walls (1) are bolted to each other by the assembly bolt (14).

3. The modular, assembled guardrail structure according to claim 1, characterized in that: The reserved sleeve (6) set at the top of the precast concrete wall (1) needs to be used in conjunction with the connector (7) set at the bottom of the steel structure. When the reserved sleeve (6) is a sleeve with threads on the inner surface, the outer surface of the connector (7) is threaded, and the reserved sleeve (6) and the connector (7) are connected by threaded connection. When the reserved sleeve (6) is a sleeve, the cross-sectional shape of the connector (7) is a circular pipe, and the connector (7) is inserted into the reserved sleeve (6) and anchored by cement mortar.

4. The modular, assembled guardrail structure according to claim 1, characterized in that: The reserved sleeve (6) is embedded in the top of the precast concrete wall (1), and the bottom surface of the steel structure coincides with the top surface of the precast concrete wall (1).

5. The modular, assembled guardrail structure according to claim 1, characterized in that: The inner diameter of the opening on one side of the steel structure is larger than the outer diameter on the other side, and the steel structures overlap longitudinally with an overlap length ≥ 100mm.

6. The modular, assembled guardrail structure according to claim 1, characterized in that: The reserved anchor bars (2) are spaced out in the post-pouring strip (3), and the foundation (5) is longitudinally spaced out with embedded steel bars (19). The cross-sectional shape of the embedded steel bars (19) is the same as that of the post-pouring strip (3). The embedded steel bars (19) and the reserved anchor bars (2) in the post-pouring strip (3) are staggered and then inserted into the longitudinal bars (20). The precast concrete wall (1) and the foundation (5) are filled with concrete by pouring concrete into the post-pouring strip (3) through the grouting hole (4).

7. A modular, assembled guardrail structure according to claim 2, characterized in that: The rectangular tube (13) is a box that is wider at the top and narrower at the bottom and has an open top surface. The rectangular tube (13) has splicing bolt holes (17) on its side. The channel steel component (10) is a rectangular box with an open top and side surface. Both the channel steel component (10) and the rectangular tube (13) have lifting rings (18) inside. The side and bottom surfaces of the channel steel component (10) and the rectangular tube (13) are welded with anchor bars to connect with the structural bars in the precast concrete wall (1).

8. The modular, assembled guardrail structure according to claim 1, characterized in that: The front slope of the precast concrete wall (1) includes F-type slope, reinforced slope, and single slope.

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