Drainage type asphalt pavement
By introducing a drainage shell, filter support components, and anti-backflow mechanism into the drainage asphalt pavement, the problem of backflow during heavy rain is solved, achieving efficient drainage and anti-backflow, and ensuring pavement safety and durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG YIWU JINDU CONSTRUCTION CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-05
AI Technical Summary
Existing drainage asphalt pavements are prone to backflow during heavy rain, leading to pavement damage from waterlogging, which affects driving safety and road durability.
The system employs a drainage shell, filter support components, and an anti-backflow mechanism, including an inclined drainage pipe, a fixed drainage ring, a movable mounting rod, and a floating sealing plate, to form an efficient drainage system that prevents rainwater from flowing back in.
It enables effective drainage under heavy rain conditions, prevents backflow, ensures the safety and normal use of the road surface structure, and improves the road's durability.
Smart Images
Figure CN224199740U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of drainage pavement structure technology, specifically a drainage-type asphalt pavement. Background Technology
[0002] Asphalt pavement is a type of asphalt pavement with a special structure. It is paved with asphalt mixtures with large pores, typically containing a large amount of coarse aggregate, resulting in a high porosity, generally around 18%-25%. This type of pavement surface has good roughness, providing good anti-skid performance. Traditional asphalt pavements, during rainfall, easily accumulate water on the road surface, causing vehicles to slip, reducing tire-to-road friction, and affecting driving safety, especially at high speeds or during sudden braking, which can easily lead to traffic accidents. At the same time, accumulated water can also cause water splashing and misting from vehicles, affecting the driver's vision and interfering with other vehicles and pedestrians. Drainage asphalt pavement, on the other hand, can quickly and effectively drain rainwater, reducing the occurrence of these problems.
[0003] For example, utility model patent CN220952766U discloses a drainage asphalt pavement structure, including a pavement structure body, drainage sections, and infiltration pipes. The pavement structure body includes, from top to bottom, a drainage asphalt layer, an infiltration layer, an impermeable layer, and a base layer. There are two drainage sections located on both sides of the pavement structure body. Each drainage section has multiple water collection tanks, and filter components are connected to the water collection tanks. In this utility model, the drainage sections are located on both sides of the pavement structure body, which does not affect the flatness of the upper surface of the pavement structure body. The drainage efficiency is further improved by combining the pavement structure body and the drainage sections. The filter components can be removed for cleaning, which improves the service life of the filter components.
[0004] However, in actual use, it was found that the device can achieve drainage inside the permeable layer by combining inclined drainage pipes, seepage pipes and permeable holes, which can improve the drainage effect of asphalt pavement to a certain extent.
[0005] However, when encountering extreme weather such as heavy rain, the large amount of rainwater will cause the drainage section's collection tank to quickly accumulate too much rainwater. Once the external drainage system is overloaded and cannot discharge in time, it is very easy to cause backflow of the tilted drainage pipe, resulting in rainwater flowing back into the infiltration layer or even the road structure itself, causing the road surface to be soaked and damaged, which seriously threatens driving safety and significantly reduces the road's durability. Therefore, a drainage-type asphalt pavement is provided. Utility Model Content
[0006] The purpose of this application is to provide a drainage-type asphalt pavement in order to solve the problems mentioned above.
[0007] The technical solution adopted in this application is as follows: A drainage-type asphalt pavement includes an asphalt pavement layer, a drainage shell is provided on the bottom surface of the asphalt pavement layer, a plurality of water inlet holes are arranged in an evenly spaced array on the top surface of the drainage shell, a filter support assembly is provided between the asphalt pavement layer and the drainage shell, drainage ditches are respectively provided on the left and right sides of the asphalt pavement layer, a water collection trough is provided on the bottom surface of the inner side of the drainage shell, a plurality of inclined drainage pipes are installed in an evenly spaced array on the inner sidewall of the water collection trough, and one end of the plurality of inclined drainage pipes extends into the interior of the drainage ditch, and an anti-backflow mechanism is provided inside one end of the drainage ditch;
[0008] The anti-backflow mechanism includes a fixed drainage ring, a movable mounting rod, and a floating sealing plate. The fixed drainage ring is fixedly installed inside the end of the inclined drainage pipe away from the water collection tank. The movable mounting rod is movably sleeved on the top surface of the fixed drainage ring, and the floating sealing plate is fixedly installed at the bottom end of the movable mounting rod.
[0009] In a preferred embodiment, the filter support assembly includes a first grid layer, a crushed stone layer, a second grid layer, and a geotextile. The first grid layer is fixedly installed on the bottom surface of the asphalt pavement layer, the crushed stone layer is fixedly installed on the bottom surface of the first grid layer, the second grid layer is fixedly installed on the bottom surface of the crushed stone layer, and the geotextile is fixedly installed on the bottom surface of the second grid layer. The bottom surface of the geotextile is fixed to the top surface of the drainage shell.
[0010] In a preferred embodiment, a limiting seat is fixedly installed near the inner sidewall of the top of the drainage ditch, and a filter cover is fixedly installed inside the drainage ditch on the top surface of the limiting seat.
[0011] In a preferred embodiment, the drainage shell is equipped with a plurality of support and reinforcement seats arranged in an equally spaced array inside, and the bottom surface of each of the plurality of support and reinforcement seats is provided with water-permeable holes.
[0012] In a preferred embodiment, a base layer is provided on the bottom surface of the drainage shell.
[0013] In a preferred embodiment, a drain grate is provided inside the drain ditch on the top surface of the filter cover.
[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:
[0015] 1. In this application, due to the adoption of the above-mentioned scheme, when rainwater infiltrates downward on the asphalt pavement layer, the water flow first passes through the filter support component, which facilitates the interception and filtration of impurities in the water. The filtered water flows into the water collection tank in the drainage shell through the water inlet hole. The water in the water collection tank is discharged into the drainage ditch through the inclined drainage pipe. When the drainage is smooth, the floating sealing plate of the anti-backflow mechanism is located at the bottom of the inclined drainage pipe, and the water can be discharged smoothly. If the external water level rises and backflow may occur, the floating sealing plate will close the outlet of the inclined drainage pipe under the action of the water to prevent water from flowing back to the road surface, thereby achieving efficient drainage and anti-backflow functions. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this application;
[0017] Figure 2 This is a schematic diagram of the internal structure of the drainage shell in this application;
[0018] Figure 3 This is a schematic diagram of the drainage shell structure before installation in this application;
[0019] Figure 4 This is a partial exploded view of the structure of this application.
[0020] The markings in the diagram are: 1. Asphalt pavement layer; 2. Drainage shell; 3. Water inlet hole; 4. Filter support assembly; 401. Grid layer one; 402. Crushed stone layer; 403. Grid layer two; 404. Geotextile; 5. Drainage ditch; 6. Water collection trough; 7. Inclined drainage pipe; 8. Anti-backflow mechanism; 801. Fixed drainage ring; 802. Movable mounting rod; 803. Floating sealing plate; 9. Limiting seat; 10. Filter cover; 11. Support reinforcement seat; 12. Water permeable hole; 13. Foundation layer; 14. Drainage grate. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0022] refer to Figures 1-4As shown, a drainage-type asphalt pavement includes an asphalt pavement layer 1, a drainage shell 2 on the bottom surface of the asphalt pavement layer 1, a base layer 13 on the bottom surface of the drainage shell 2, and multiple support and reinforcement seats 11 installed in an equally spaced array inside the drainage shell 2. Each support and reinforcement seat 11 has permeable holes 12 on its bottom surface, and multiple water inlet holes 3 are equally spaced on the top surface of the drainage shell 2. A filter support assembly 4 is provided between the asphalt pavement layer 1 and the drainage shell 2. The base layer 13 provides stable support for the entire pavement structure, ensuring the pavement's load-bearing capacity. The support and reinforcement seats 11 enhance the structural strength of the drainage shell 2, preventing deformation under pressure. The permeable holes 12 assist in drainage, and the water inlet holes 3 facilitate the rapid flow of accumulated water from the asphalt pavement layer 1 into the drainage shell 2, promptly introducing surface water into the drainage system. The filter support assembly 4, while supporting the pavement, also performs preliminary filtration of the water entering the drainage shell 2, preventing large particles from clogging the drainage channels.
[0023] refer to Figures 1-4 As shown, the filter support component 4 includes a first grid layer 401, a crushed stone layer 402, a second grid layer 403, and a geotextile 404. The first grid layer 401 is fixedly installed on the bottom surface of the asphalt pavement layer 1, the crushed stone layer 402 is fixedly installed on the bottom surface of the first grid layer 401, the second grid layer 403 is fixedly installed on the bottom surface of the crushed stone layer 402, and the geotextile 404 is fixedly installed on the bottom surface of the second grid layer 403. The bottom surface of the geotextile 404 is fixed to the top surface of the drainage shell 2. The first grid layer 401 and the second grid layer 403 can provide support and initially intercept large particles of debris. The crushed stone layer 402 can further filter impurities in the water and disperse road pressure. The geotextile 404 can effectively block fine particles such as soil, preventing them from entering the drainage system and causing blockages. It also has good permeability, ensuring smooth water passage and guaranteeing drainage efficiency.
[0024] refer to Figures 1-4As shown, drainage ditches 5 are respectively provided on the left and right sides of the asphalt pavement layer 1. A water collection trough 6 is provided on the bottom surface of the drainage shell 2. Multiple inclined drainage pipes 7 are installed in an array at equal intervals on the inner side wall of the water collection trough 6, and one end of the multiple inclined drainage pipes 7 extends into the drainage ditch 5. A limiting seat 9 is fixedly installed on the inner side wall of the drainage ditch 5 near the top. A filter cover 10 is fixedly installed on the top surface of the limiting seat 9 inside the drainage ditch 5. A drainage grate 14 is provided on the top surface of the filter cover 10 inside the drainage ditch 5. An anti-backflow mechanism 8 is provided inside one end of the drainage ditch 5. The drainage ditch 5 facilitates transverse drainage of the road surface, quickly collects and guides water flow. The water collection trough 6 and the inclined drainage pipes 7 form a longitudinal drainage channel to concentrate and discharge accumulated water. The limiting seat 9 positions the filter cover 10. The filter cover 10 and the drainage grate 14 further intercept debris to prevent debris from entering the interior of the drainage ditch 5. The anti-backflow mechanism 8 can effectively prevent water from backflowing back into the drainage surface when the external water level is high, ensuring the normal operation of the drainage system.
[0025] refer to Figures 1-4 As shown, the anti-backflow mechanism 8 includes a fixed drainage ring 801, a movable mounting rod 802, and a floating sealing plate 803. The fixed drainage ring 801 is fixedly installed inside the end of the inclined drainage pipe 7 away from the water collection tank 6. The movable mounting rod 802 is movably sleeved on the top surface of the fixed drainage ring 801, and the floating sealing plate 803 is fixedly installed at the bottom end of the movable mounting rod 802. When the inclined drainage pipe 7 is draining normally, the water flow pushes the floating sealing plate 803, causing it to float and opening the drainage channel. When the external water level rises and the water flow reverses, the floating sealing plate 803, under the action of buoyancy and water flow pressure, tightly fits against the fixed drainage ring 801, sealing the drainage outlet and preventing water backflow. The structure is simple, practical, and reliable.
[0026] The implementation principle of a drainage-type asphalt pavement embodiment of this application is as follows: During rainfall, surface water flows into the drainage system through the drainage ditches 5 on both sides of the asphalt pavement layer 1 and the inclined drainage pipes 7 on the side of the drainage shell 2. When rainwater seeps downwards from the asphalt pavement layer 1, the water flow first passes through the sequential filtration of the first mesh layer 401, the crushed stone layer 402, the second mesh layer 403, and the geotextile 404 in the filter support assembly 4, thereby facilitating the interception and filtration of impurities in the water. The filtered water flows into the water collection tank 6 inside the drainage shell 2 through the water inlet hole 3. Water in the trough 6 is discharged into the drainage ditch 5 through the inclined drain pipe 7. During this process, the drainage grate 14 and the filter cover 10 further filter debris. When the drainage is smooth, the floating sealing plate 803 of the anti-backflow mechanism 8 is located at the bottom of the inclined drain pipe 7, and the water can be discharged smoothly. If the external water level rises and backflow may occur, the floating sealing plate 803 will close the outlet of the inclined drain pipe 7 under the action of the water to prevent water from flowing back to the road surface, thereby achieving efficient drainage and anti-backflow functions, ensuring the normal use and structural safety of the asphalt pavement in rainy weather.
[0027] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A drainage-type asphalt pavement, comprising an asphalt pavement layer (1), characterized in that: The bottom surface of the asphalt pavement layer (1) is provided with a drainage shell (2). The top surface of the drainage shell (2) is provided with multiple water inlet holes (3) arranged in an evenly spaced array. A filter support assembly (4) is provided between the asphalt pavement layer (1) and the drainage shell (2). Drainage ditches (5) are provided on the left and right sides of the asphalt pavement layer (1). A water collection trough (6) is provided on the bottom surface of the drainage shell (2). Multiple inclined drainage pipes (7) are installed in an evenly spaced array on the inner side wall of the water collection trough (6). One end of the multiple inclined drainage pipes (7) extends into the drainage ditch (5). An anti-backflow mechanism (8) is provided inside one end of the drainage ditch (5). The anti-backflow mechanism (8) includes a fixed drainage ring (801), a movable mounting rod (802), and a floating sealing plate (803). The fixed drainage ring (801) is fixedly installed inside the end of the inclined drainage pipe (7) away from the water collection tank (6). The movable mounting rod (802) is movably sleeved on the top surface of the fixed drainage ring (801). The floating sealing plate (803) is fixedly installed at the bottom end of the movable mounting rod (802).
2. The drainage-type asphalt pavement as described in claim 1, characterized in that: The filter support assembly (4) includes a first grid layer (401), a crushed stone layer (402), a second grid layer (403), and a geotextile (404). The bottom surface of the asphalt pavement layer (1) is fixedly installed with the first grid layer (401), the bottom surface of the first grid layer (401) is fixedly installed with the crushed stone layer (402), the bottom surface of the crushed stone layer (402) is fixedly installed with the second grid layer (403), the bottom surface of the second grid layer (403) is fixedly installed with the geotextile (404), and the bottom surface of the geotextile (404) is fixed to the top surface of the drainage shell (2).
3. The drainage-type asphalt pavement as described in claim 1, characterized in that: A limiting seat (9) is fixedly installed near the inner side wall of the top of the drainage ditch (5), and a filter cover (10) is fixedly installed inside the drainage ditch (5) on the top surface of the limiting seat (9).
4. The drainage-type asphalt pavement as described in claim 1, characterized in that: The drainage shell (2) is equipped with a plurality of support and reinforcement seats (11) arranged in an equally spaced array inside, and the bottom surface of each of the plurality of support and reinforcement seats (11) is provided with a water-permeable hole (12).
5. A drainage-type asphalt pavement as described in claim 1, characterized in that: The bottom surface of the drainage shell (2) is provided with a base layer (13).
6. A drainage-type asphalt pavement as described in claim 3, characterized in that: The drainage ditch (5) is provided with a drainage grate (14) on the top surface of the filter cover (10).