Ground wrapper with anti-collision and drainage functions for road guardrail

Abstract

The invention relates to the technical field of road traffic safety and drainage design, in particular to a road guardrail base with anti-collision and drainage functions, the road guardrail base comprises a top connecting structure, a bearing structure and a drainage notch, the top connecting structure is fixedly connected with a concrete guardrail through embedded steel bars, the bearing structure is located below a pavement structure, and the drainage notch is located below the bearing structure. The drainage opening is formed in the top connecting structure, and the drainage opening is used for assembling a transverse water collecting ditch; the top connecting structure and the bearing structure are arranged at the top of the retaining wall, and the ground cloth difformis and the retaining wall can move relatively; the transverse water collecting ditch comprises an inlet and a drainage part, the drainage part is used for draining water transmitted at the inlet, and the inlet is formed between the transverse water collecting ditch and the concrete guardrail; longitudinal blind ditches are formed in the pavement structure and are in through connection with the drainage parts of the transverse collecting ditches through drainage pipes; therefore, under the condition of saving consumables, the influence of vehicle collision on the retaining wall is reduced through the ground cloth dips, and meanwhile the drainage capacity of a road is improved.

Description

Technical Field

[0001] This invention relates to the field of road traffic safety and drainage design technology, specifically to a road guardrail base with anti-collision and drainage functions. Background Technology

[0002] In highway and urban road design, retaining walls are often required to address land use constraints and avoidance of structures, with crash barriers installed on top to prevent vehicles from leaving the road. Conventional crash barrier designs involve directly fixing the barrier to the top of the retaining wall using pre-embedded steel bars, flanges, or sleeves, making the barrier and retaining wall a unified whole to resist vehicle impacts. However, with recent updates to relevant standards, the design impact load for vehicles has been gradually increasing. This necessitates considering not only the strength and stability issues caused by backfill pressure in retaining wall design but also the significant impact effects of vehicle collisions, resulting in a substantial increase in the structural dimensions and reinforcement of the retaining wall and ultimately, higher costs. This is particularly evident in lightweight fill retaining structures: because lightweight fill (such as foamed lightweight soil) is used behind the wall, its active earth pressure approaches zero, allowing for a weaker retaining structure (such as lightweight columns and decorative panels). However, considering the impact effect of the top crash barrier, a stronger retaining structure is necessary.

[0003] On the other hand, when the crash barrier is made of concrete, it obstructs the original drainage path of the road crown's cross slope. The conventional solution is to pre-embed drainage pipes or leave openings within the concrete barrier to allow rainwater to drain smoothly from the road surface. However, this approach still has drawbacks: because the spacing between the reinforcing bars within the barrier is typically 100mm, the diameter of the pre-embedded drainage pipes is limited, and the height of the reserved openings is also restricted (typically 75mm above the road surface and 150mm wide). This results in both solutions having limited drainage capacity and being prone to blockage by foreign objects, and they do not adequately address the lateral drainage of rainwater from within the road surface.

[0004] Therefore, it is imperative to improve the existing road guardrail system to address the technical deficiencies in the aforementioned technical solutions. Summary of the Invention

[0005] The purpose of this invention is to provide a ground cover for road guardrails with anti-collision and drainage functions to solve the problems mentioned in the background art. While saving materials, the ground cover reduces the impact of vehicle collisions on retaining walls and improves the drainage capacity of roads.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A road guardrail base with anti-collision and drainage functions includes: The ground cover includes a top connecting structure, a load-bearing structure, and a drainage opening. The top connecting structure is fixedly connected to the concrete guardrail by pre-embedded steel bars. The load-bearing structure is located under the road surface structure. The drainage opening is set in the top connecting structure and is used to assemble a transverse water collection ditch. The top connecting structure and load-bearing structure are set on the top of the retaining wall, and the ground bearing and the retaining wall can move relative to each other; The transverse drainage ditch includes an inlet and a drainage section. The drainage section is used to discharge the water transferred from the inlet. The inlet is located between the transverse drainage ditch and the concrete guardrail. The road structure includes longitudinal blind drains, which are connected to the drainage section of the transverse collection ditch via drainage pipes.

[0007] The above technical solution produces the following technical effects: The road guardrail ground cover design in this application involves placing the ground cover on top of the retaining wall via a top connecting structure and a load-bearing structure. This means the ground cover is not directly connected to the retaining wall, but merely placed on top, allowing for horizontal displacement relative to the retaining wall. This prevents the impact force from being directly and completely transmitted to the retaining wall, thus saving on the retaining wall's cross-sectional dimensions and material usage. Simultaneously, it confines potential impact damage to the guardrail section, avoiding damage to the retaining wall and further reducing maintenance costs.

[0008] In addition, the above-mentioned technical solution of this application increases the cross-sectional size of a single drainage outlet by setting a drainage opening in the connecting structure at the top of the ground cover to accommodate the transverse water collection ditch (open structure with an opening inside), thereby reducing the possibility of siltation, facilitating dredging, and improving the road surface drainage capacity under heavy rain conditions.

[0009] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the road surface structure includes, along the depth direction, the following components in sequence: The pavement layer is used to bear vehicle loads and fill longitudinal blind drains; Sealing layer, applied between the pavement layer and the base layer; The base layer is used to fill in the top connecting and load-bearing structures; The transverse drainage ditch was filled in both the pavement layer and the base layer.

[0010] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the bottom of the load-bearing structure is provided with a retaining wall, the load-bearing structure is fixedly connected with a tenon structure, the tenon structure is perpendicularly connected to the load-bearing structure, and a buffer layer is filled between the tenon structure and the retaining wall.

[0011] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the filler of the buffer layer is compacted soil or graded crushed stone.

[0012] As a further improvement to the road guardrail base with anti-collision and drainage functions of this application, a subbase is also provided at the bottom of the base layer, and the side of the tenon structure away from the buffer layer is buried in the subbase.

[0013] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the road surface layer includes: a top layer, a middle layer and a bottom layer, wherein the top layer is used to bear vehicle loads; The longitudinal blind drain is installed between the top layer and the sealing layer, with the top layer used to fill the longitudinal blind drain.

[0014] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the longitudinal blind ditch is filled with sand-free concrete. The longitudinal blind ditch is used to collect rainwater collected along the transverse slope of the upper layer and discharge the rainwater to the drainage section of the transverse collection ditch through the drainage pipe.

[0015] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the entrance is an open structure with a gap inside, and a rain grate is installed in the gap. The entrance is closely attached to the concrete guardrail.

[0016] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the lateral width at the entrance is less than the width of the vehicle tires.

[0017] As a further improvement to the road guardrail with anti-collision and drainage functions of this application, the exterior of the drainage section is fixedly connected to the exterior drainage pipe by a metal end fixing plate. The bend of the exterior drainage pipe points downward, so that the collected rainwater is introduced into the roadside ditch or rainwater pipe network. Attached Figure Description

[0018] Figure 1 This is a top view of the ground cover for the road guardrail of the present invention; Figure 2 for Figure 1 Sectional view along AA; Figure 3 for Figure 1 Cross-sectional view along BB; Figure 4 This is a schematic diagram of the structure of the ground cover for the road guardrail of the present invention; Figure 5 This is a schematic diagram of the transverse water collection ditch of the present invention; Tag name: 1-ground burden; 11-Top connection structure; 12-Bearing structure; 13-Drainage opening; 14-Tenon joint structure; 2- Concrete guardrail; 3-Embedded reinforcing bars; 4-Buffer layer; 5- Horizontal drainage ditch; 51 - Entrance; 511-Gap; 52-Drainage section; 6-Rain drain grate; 7-Drain pipe; 8-Longitudinal blind drain; 9-Exterior facade drainage pipe; 10-Retaining wall; 100 - Road surface structure; 110 - Road surface layer; 111 - Upper layer; 112 - Middle layer; 113 - Lower layer; 120-Sealing; 130 - Grassroots; 140 - Subbase layer. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Specifically, the objective of this invention is to overcome the shortcomings of existing conventional solutions by designing a guardrail base 1 that can dissipate and weaken the impact effect of the crash barrier, reducing its influence on the lower retaining wall. Simultaneously, it rationally arranges drainage outlets, increases the drainage cross-sectional size, reduces the possibility of clogging, and facilitates maintenance. For example... Figure 1-5 As shown, in order to achieve the above functions, the road guardrail base 1 with anti-collision and drainage functions of this application includes a top connecting structure 11, a load-bearing structure 12 and a drainage opening 13. The top connecting structure 11 is fixedly connected to the concrete guardrail 2 by pre-embedded steel bars 3. The load-bearing structure 12 is located under the road surface structure 100. The drainage opening 13 is set on the top connecting structure 11 and is used to assemble the transverse water collection ditch 5.

[0021] Specifically, in this application, the bottom of the foundation 1 is not connected to the retaining wall 10. It is placed on top of the retaining wall only through the top connecting structure 11 and the load-bearing structure 12, allowing it to move horizontally relative to the retaining wall and preventing the impact force from being directly transmitted to the retaining wall. Secondly, the bottom of the load-bearing structure 12 is connected to the retaining wall 10, and the load-bearing structure 12 is fixedly connected to a tenon structure 14, which is perpendicularly connected to the load-bearing structure 12. Thus, the entire foundation 1 has a chair-like shape, with its lateral width extended, and the aforementioned anti-slip tenon structure 14 is provided at the rear. In this case, the tenon is not tightly attached to the retaining wall 10, but maintains a certain distance from the retaining wall (determined by calculation).

[0022] Furthermore, a buffer layer 4 is filled between the tenon structure 14 and the retaining wall 10. A gap is reserved between the tenon structure 14 and the retaining wall 10 to store the buffer layer 4, and the buffer layer 4 is filled with buffer filler (such as compacted soil or graded crushed stone). In the specific implementation process, if the ground cover 1 moves due to a vehicle impact, it will cause the tenon structure 14 to compress the buffer layer 4. The buffer layer 4 dissipates the impact energy through the plastic deformation of the filler, limiting the overall displacement of the ground cover 1. In addition, after the impact, the ground cover 1 and the retaining wall as a whole only undergo limited displacement. During repair, it is only necessary to reset the ground cover 1 and repair the road surface cracks and the damaged surface of the retaining wall, without the need to reinforce the retaining wall 10.

[0023] Specifically, the pavement structure 100 along the depth direction (specifically, as shown in...) Figure 2-3 The structure (in the X direction shown) sequentially includes a pavement layer 110, a sealing layer 120, and a base layer 130. The pavement layer 110 bears vehicle loads and fills the longitudinal blind drains 8; the sealing layer 120 is located between the pavement layer 110 and the base layer 130; the base layer 130 is used to fill the top connecting structure 11 and the load-bearing structure 12; the pavement layer 110 and the base layer 130 simultaneously fill the transverse drainage ditches 5. The base layer 130 also has a subbase layer 140 at its bottom, with the tenon structure 14's side away from the buffer layer 4 buried in the subbase layer 140. However, the main body of the ground cover 1 is located within the base layer 130 and the subbase layer 140 of the pavement structure 100, with at least one base layer 130 remaining between it and the top surface layer to reduce the impact of rigidity-flexibility differences on the surface layer.

[0024] Furthermore, to enhance drainage capacity through integrated design of the drainage system, this application includes a transverse drainage ditch 5 comprising an inlet 51 and a drainage section 52. The drainage section 52 discharges water transferred from the inlet 51, which is located between the transverse drainage ditch 5 and the concrete guardrail 2. Additionally, a longitudinal blind ditch 8 is provided in the road structure 100, which is connected to the drainage section 52 of the transverse drainage ditch 5 via a drainage pipe 7. The transverse drainage ditch 5 is embedded at certain intervals below the concrete guardrail 2, closely adhering to the bottom of the guardrail. An external drainage pipe 9 is fixedly connected to the exterior of the drainage section 52 of the transverse drainage ditch 5 via a metal end fixing plate. The bend of the external drainage pipe 9 points downwards, directing the collected rainwater into the roadside ditch or stormwater network. This forms a dual drainage structure that drains both the surface and interior of the road structure. The outlet of the horizontal water collection ditch 5 is connected to the anti-aging exterior drainage pipe 9, which directs rainwater into the roadside ditch or drainage pipe network 7, thereby reducing the risk of siltation and facilitating dredging.

[0025] Specifically, the entrance 51 is an open structure with an opening 511 inside, and a rain grate 6 is installed in the opening 511. The entrance 51 is closely attached to the concrete guardrail 2. Specifically, as... Figure 4-5 As shown, the opening 511 is specifically a stepped structure, through which a rain grate 6 can be installed. The rain grate 6 is used to block debris, and the lateral width of the inlet 51 is less than the width of the vehicle tire. While ensuring a certain water passage area, it also ensures that when the vehicle's wheel tracks are close to the guardrail, the wheels will not sink into the drain or damage the grate.

[0026] Furthermore, Figure 2 As shown, the pavement layer 110 includes a top layer 111, a middle layer 112, and a bottom layer 113. The top layer 111 is used to bear vehicle loads. The longitudinal blind drain 8 is disposed between the top layer 111 and the sealing layer 120, and the top layer 111 is used to fill the longitudinal blind drain 8. When the longitudinal blind drain 8 is disposed between the top layer 111 and the sealing layer 120, the top layer 111 can provide a certain degree of protection for the longitudinal blind drain 8, preventing vehicles from directly damaging it.

[0027] Furthermore, the blind drain is filled with sand-free concrete, and its porous structure can quickly collect and drain rainwater, which flows into the transverse water collection ditch 5 through the plastic drainage pipe 7, and then is discharged through the exterior drainage pipe 9.

[0028] In the specific implementation process, the vehicle impacts the inner side of the concrete guardrail 2, generating a short-term horizontal impact force. Since the concrete guardrail 2 and the ground cover 1 are a single unit connected by steel bars, the impact effect is also transmitted to the ground cover 1. The impact effect of the vehicle generates both a horizontal thrust and an overturning moment on the ground cover 1. The overturning moment is greatly reduced by the offsetting effect of the vehicle's weight and the weight of the road structure 100. The horizontal thrust is offset by the frictional force at the bottom of the ground cover 1 and the horizontal resistance of the buffer filler, allowing the guardrail-ground cover 1 to stabilize again after a certain displacement. Due to the special structure of the ground cover 1, during maintenance and repair, it is only necessary to reposition the ground cover 1 and repair any possible road surface cracks and damaged parts of the guardrail. Therefore, the structure described in this application weakens and eliminates the impact effect of the crash barrier on the lower retaining wall 10, thereby reducing the structural requirements of the retaining wall 10 and reducing construction costs; at the same time, it limits the possible structural displacement and damage to the area of ​​the guardrail and ground cover 1, avoiding the need for reinforcement and repair of the retaining wall 10, thereby reducing operation and maintenance costs.

[0029] Furthermore, rainwater from the road surface collects along the road crown's cross slope towards the shoulder, then flows through storm drains into the transverse drainage ditch 5. Some rainwater seeps into the intermediate surface layer 112 and the lower surface layer 113, and due to the impermeable seal layer 120, it also collects along the road crown's cross slope towards the shoulder, flowing into the blind drain at the earthen shoulder location. Thus, this application, by setting up an independent transverse drainage ditch 5 below the guardrail and combining it with the guardrail drainage opening 13, greatly increases the drainage capacity of a single drainage outlet, raises the upper limit of road surface rainwater drainage capacity, facilitates dredging, and reduces the possibility of clogging. The longitudinal blind drain 8 connects to the transverse drainage ditch 5, rationally designing the drainage path of rainwater inside the surface layer.

[0030] It is worth noting that the above-mentioned structural features of this application are not limited to those shown in the attached drawings: the perimeter of the storm drain grate can be designed with a partial depression to promote local water collection. The connection between the transverse drainage ditch 5 and the exterior drainage pipe 9 can gradually transition to a circular cross-section to reduce the possibility of debris clogging and facilitate drainage. The ground cover 1 can be buried in a deeper layer to reduce pavement damage. The bottom tenon structure 14 of the ground cover 1 can be perpendicular to the bottom surface or at other required angles.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A road guardrail base with anti-collision and drainage functions, characterized in that, include: The ground cover (1) includes a top connecting structure (11), a load-bearing structure (12), and a drainage opening (13) provided in the top connecting structure (11). The top connecting structure (11) is fixedly connected to the concrete guardrail (2) by pre-embedded steel bars (3). The load-bearing structure (12) is located under the road surface structure (100). The drainage opening (13) is provided in the top connecting structure (11). The drainage opening (13) is used to assemble the transverse water collection ditch (5). The top connecting structure (11) and the bearing structure (12) are disposed on the top of the retaining wall (10), and the ground bearing (1) and the retaining wall (10) can move relative to each other; The transverse water collection ditch (5) includes an inlet (51) and a drainage section (52). The drainage section (52) is used to discharge the water transferred from the inlet (51). The inlet (51) is located between the transverse water collection ditch (5) and the concrete guardrail (2). The road structure (100) is provided with a longitudinal blind ditch (8), which is connected to the drainage section (52) of the transverse water collection ditch (5) through a drainage pipe (7).

2. A road guardrail base with anti-collision and drainage functions as described in claim 1, characterized in that, The road surface structure (100) includes, along the depth direction, the following components in sequence: The road surface layer (110) is used to bear vehicle loads and fill the longitudinal blind drain (8). A sealing layer (120) is disposed between the pavement layer (110) and the base layer (130); The base layer (130) is used to fill the top connecting structure (11) and the load-bearing structure (12). The road surface layer (110) and the base layer (130) are simultaneously filled with the transverse drainage ditch (5).

3. A road guardrail base with anti-collision and drainage functions according to claim 2, characterized in that, The bottom of the bearing structure (12) is provided with a retaining wall (10), and the bearing structure (12) is fixedly connected with a tenon structure (14). The tenon structure (14) is perpendicularly connected to the bearing structure (12), and a buffer layer (4) is filled between the tenon structure (14) and the retaining wall (10).

4. A road guardrail base with anti-collision and drainage functions as described in claim 3, characterized in that, The buffer layer (4) is filled with compacted soil or graded crushed stone.

5. A road guardrail base with anti-collision and drainage functions according to claim 3, characterized in that, The bottom of the base layer (130) is also provided with a subbase layer (140), and the side of the tenon structure (14) away from the buffer layer (4) is buried in the subbase layer (140).

6. A road guardrail base with anti-collision and drainage functions according to claim 2, characterized in that, The road surface layer (110) includes: a top layer (111), a middle layer (112) and a bottom layer (113), wherein the top layer (111) is used to bear vehicle loads; The longitudinal blind drain (8) is disposed between the top layer (111) and the sealing layer (120), and the top layer (111) is used to fill the longitudinal blind drain (8).

7. A road guardrail base with anti-collision and drainage functions according to claim 6, characterized in that, The longitudinal blind drain (8) is filled with sand-free concrete. The longitudinal blind drain (8) is used to collect rainwater collected along the transverse slope of the upper layer (111) and discharge the rainwater through the drain pipe (7) to the drainage section (52) of the transverse water collection ditch (5).

8. A road guardrail base with anti-collision and drainage functions according to claim 1, characterized in that, The entrance (51) is an open structure with a notch (511) inside. A rain grate (6) is installed in the notch (511). The entrance (51) is close to the concrete guardrail (2).

9. A road guardrail base with anti-collision and drainage functions according to claim 8, characterized in that, The lateral width of the entrance (51) is less than the width of the vehicle tires.

10. A road guardrail base with anti-collision and drainage functions according to claim 1, characterized in that, The exterior of the drainage section (52) is fixedly connected to the exterior drainage pipe (9) by a metal end fixing plate. The bend of the exterior drainage pipe (9) is downward, which leads the collected rainwater into the roadside ditch or rainwater pipe network.

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