A permeable paving road structure

Abstract

The utility model discloses a water permeable pavement road structure, including car road structure, pedestrian pavement structure and pedestrian overflow structure, and the pedestrian overflow structure is located in the pedestrian pavement structure and one side is close to the curb, the curb side surface adjacent with the pedestrian overflow structure has the opening, and the water permeable board is installed in the opening, the pedestrian overflow structure includes grating type pavement, overflow pool, overflow pipe and rainwater pipe, and the overflow well is connected with the rainwater pipe through the side wall bottom opening parallel to the car road structure, and the side wall bottom opening vertical to the car road structure is connected with the overflow pipe, and the other end of overflow pipe passes through the longitudinal access adjacent overflow well of overflow pool, through the pedestrian overflow structure, can accept the rainwater from the pedestrian pavement and the car road on the basis of not influencing the road structure, and the rainwater is converged into the preset rainwater pool and is unified utilization, and effective utilization rainwater can save municipal water resources, and simultaneously, the component can be standardized, the modularization unified production, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of permeable pavement technology, specifically to a permeable pavement road structure. Background Technology

[0002] Sponge city is a new generation of urban stormwater management concept. The construction of sponge city includes many aspects such as stormwater regulation and storage, rainwater collection and utilization of groundwater.

[0003] Because road paving frequently experiences water accumulation during the rainy season, permeable paving has become an important research area in the construction of "sponge cities." However, existing research on permeable paving technology is mostly limited to a single type of permeable paving, such as permeable paving for vehicular roads or permeable paving for pedestrian walkways, and has not conducted systematic research.

[0004] For example, Chinese invention patent application CN120042261A (published on May 27, 2025) discloses a shallow permeable water storage device and method, including: a permeable paving unit, which includes multiple evenly arranged permeable paving bricks and a permeable support grid fixedly laid on the underside of the permeable paving bricks; and a shallow storage unit, which includes a shallow storage tank disposed directly below the permeable support grid and a permeable support plate laid in the shallow storage tank. Rainwater passes through the permeable paving bricks and enters the shallow storage tank, where the water flows into a clean water tank for rainwater collection. This patent simplifies the cleaning process of the storage device by automatically cleaning the storage space module without disassembling the permeable paving bricks.

[0005] Chinese utility model patent application CN222332400U (publication date: January 10, 2025) discloses a permeable pavement structure for roads, including a road base layer with curb stones and curb stones on both sides, and a permeable surface layer located above the road base layer and between the curb stones and curb stones. The permeable surface layer contains a water-guiding structure, with a water storage ditch on the side closest to the curb stone and a drainage ditch above the water storage ditch. This patent, by placing the water storage ditch on the side of the permeable surface layer, prevents road surface subsidence and depressions caused by heavy vehicle traffic, thus ensuring the road's service life and reducing maintenance workload. Furthermore, the water-guiding structure within the permeable surface layer facilitates drainage during continuous rainfall and allows water vapor to pass through the permeable surface layer during periods of high temperature, effectively cooling the road surface.

[0006] A Chinese utility model patent application (published on July 2, 2024) discloses a permeable pavement structure, including a road layer, drainage holes on the surface of the road layer, and a filter barrel located below the drainage holes. The surface of the road layer has drainage channels, and a water pipe is installed on one side of the road layer with an outlet connected to the top. A slider is fixed to the outer wall of each drainage hole, and handles are installed on both sides of the top of each drainage hole. This patent utilizes a filter screen with pores of varying sizes and layered filtration to achieve finer initial filtration of rainwater, reducing the direct flow of impurities into the drainage holes and preventing blockages.

[0007] In summary, existing technologies often study a single type of permeable pavement in isolation, without combining permeable pavement for vehicular roads or pedestrian walkways in a joint design. However, in reality, the two are often combined. Therefore, there is an urgent need to develop a permeable pavement road structure that can overcome the shortcomings of the existing technologies and systematically design permeable pavement road structures without increasing construction difficulty and costs, achieving a synergistic effect greater than the sum of its parts. Utility Model Content

[0008] To address the aforementioned issues, this application proposes a permeable pavement road structure, comprising: a vehicular road structure and a pedestrian pavement structure, wherein a curb is installed between the vehicular road structure and the pedestrian pavement structure, and further comprising a pedestrian overflow structure, wherein the pedestrian overflow structure is located within the pedestrian pavement structure and one side is in close contact with the curb. The top surface of the pedestrian overflow structure is not higher than the pedestrian pavement structure, and both the vehicular road structure and the pedestrian pavement structure are inclined toward the pedestrian overflow structure to facilitate rainwater drainage into the pedestrian overflow structure. The pedestrian overflow structure includes a grid-type paving, an overflow pool, an overflow pipe, and a rainwater pipe. The top of the overflow pool is equipped with a grid-type paving. The perimeter of the grid-type paving is made of metal, which can provide good support and meet the needs of pedestrian passage. At the same time, the grid-type paving can quickly separate rainwater and fallen leaves to prevent the overflow well from becoming blocked. An overflow well is installed inside the overflow pool. There is backfill soil between the outer wall of the overflow well and the inner wall of the overflow pool. The bottom opening of the side wall of the overflow well, which is parallel to the roadway structure, is connected to the rainwater pipe. The bottom opening of the side wall of its vertical roadway structure is connected to the overflow pipe. The other end of the overflow pipe passes through the overflow pool and is longitudinally connected to the adjacent overflow well. The rainwater pipe is pre-embedded in the road structure and the other end is transversely connected to the main rainwater pipe. An opening is provided on the side of the curbstone adjacent to the pedestrian overflow structure. A permeable plate is installed in the opening. The length of the permeable plate is no greater than the distance between the inner walls of the overflow pool. This is used to drain rainwater from the vehicular road structure into the pedestrian overflow structure.

[0009] Furthermore, the overflow pool and the grid-type pavement are movably connected; the grid-type pavement includes several grid units, the width of the overflow pool is the same as the width of the grid units, and the length of the overflow pool is several times the length of the grid units. The grid units can be prefabricated, and the installation and maintenance of the grid-type pavement can be completed quickly.

[0010] Furthermore, the backfill soil consists of a second crushed stone layer, a first crushed stone layer, and a replacement layer from bottom to top. The particle size of the second crushed stone layer is 3-5 cm; the particle size of the first crushed stone layer is 0.5-1 cm; the medium soil of the replacement layer is coarse sand, planting soil, and coconut coir, with a volume ratio of 4:4:2, which can effectively filter impurities in rainwater.

[0011] Furthermore, the road structure consists of, from bottom to top, a roadbed layer, a gravel cushion layer, a base layer, and a surface layer. The road structure also includes a drainage stone assembly, which is installed close to the curb stone for rapid drainage of rainwater. The bottom surface of the drainage stone assembly is located on the base layer, and the top surface of the drainage stone assembly is flush with the bottom of the permeable plate.

[0012] Furthermore, the pedestrian pavement structure consists of, from bottom to top, a road base layer, a crushed stone subbase, a permeable concrete base layer, a coarse sand layer, and a permeable brick layer. A drainage blind pipe is installed in the crushed stone subbase, and the drainage blind pipe is connected to the interior of the overflow pool.

[0013] Furthermore, the grid unit is square with a width of 60-90cm, and the overflow pool is provided with crossbeams between the grid units to support the grid units.

[0014] Furthermore, the number of overflow wells may be one or more.

[0015] Furthermore, the slope of the vehicular road structure is 1% to 3%; the slope of the pedestrian pavement structure is 1% to 3%.

[0016] Furthermore, the drainage stone component consists of a fine stone concrete leveling layer, a mortar leveling layer, and a flat stone from bottom to top; the flat stone slopes towards the permeable board from top to bottom with a slope of 2% to 5%.

[0017] Furthermore, the base layer comprises a porous stabilized crushed stone upper base layer and a concrete lower base layer, with a sealing layer provided between the two.

[0018] Furthermore, plants can be planted in the backfill soil.

[0019] The road structure and pedestrian pavement structure can absorb rainwater from the ground on their own. Excess rainwater that the road structure cannot absorb flows through the openings in the curbstone, through the permeable board to filter out larger debris such as fallen leaves and plastic bags, and then into the backfill soil of the overflow pool. Excess rainwater that cannot be absorbed by the pedestrian pavement structure flows along the surface layer of the pedestrian pavement structure 200 to the grid pavement 310, and after being filtered by it, it also flows into the backfill soil of the overflow pool. In addition, rainwater absorbed by the pedestrian pavement structure enters the drainage blind pipe after infiltration through layers, and is discharged into the overflow pool through the drainage blind pipe; When the rainwater flow rate is low, the rainwater in the overflow pool is filtered by the backfill soil and flows into the overflow well through the overflow pipe; when the rainwater flow rate is high and the overflow pool is quickly filled, the rainwater is filtered by the backfill soil and flows into the overflow well through the overflow well cover after reaching a certain height. Rainwater inside the overflow well flows through a rainwater pipe into the main rainwater pipe, and then into a pre-designated rainwater collection tank, thus completing the rainwater collection process.

[0020] Compared with existing technologies, the advantages and effects of this application are as follows: 1. This application utilizes a pedestrian overflow structure to collect rainwater from pedestrian pavement and vehicular roads without affecting the road structure, and then collects the rainwater into a pre-designed rainwater pool for unified utilization. Effective utilization of rainwater can save municipal water resources. At the same time, its components can be standardized and modularized for unified production, improving production efficiency.

[0021] 2. The design of the pedestrian pavement structure proposed by the applicant can quickly absorb rainwater from the ground when the rainwater flow is small, preventing accidents caused by slippery road surfaces. At the same time, the pedestrian pavement structure is also equipped with drainage blind pipes, which can discharge rainwater seeping into the pedestrian pavement structure into the pedestrian overflow structure, which can better collect rainwater from the pedestrian pavement.

[0022] 3. The design of the road structure in this application can quickly absorb rainwater from the ground when the rainwater flow is small, preventing rainwater from accumulating on uneven ground or forming streams, which would cause water to splash when vehicles drive by, creating a bad impression on pedestrians and non-motorized vehicle drivers; at the same time, the road structure is equipped with a sealing layer, which can effectively control the amount of rainwater absorbed and prevent excessive rainwater from affecting the roadbed and shortening the service life of the road structure.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0024] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] in: Figure 1 This is a top view of a permeable pavement road structure according to this application; Figure 2 This is a plan view of a permeable pavement road structure according to this application; Figure 3 This is a cross-sectional view (AA) of a permeable pavement road structure according to this application; Figure 4 This is a BB cross-sectional view of a permeable pavement road structure according to this application; Figure 5 This is a schematic diagram of a pedestrian paving structure for a permeable pavement road structure according to this application.

[0027] Explanation of reference numerals in the attached diagram: 100 - Roadway structure; 110 - Drainage stone component; 1110 - Flat stone; 1120 - Mortar leveling layer; 1130 - Fine aggregate concrete leveling layer; 120 - Surface layer; 130 - Base layer; 1310 - Porous stabilized crushed stone upper base layer; 1320 - Sealing layer; 1330 - Concrete lower base layer; 140 - Sand and gravel subbase; 150 - Road base course 1; 200 - Pedestrian pavement structure; 210 - Road base layer II; 220 - Crushed stone subbase; 230 - Drainage blind pipe; 240 - Permeable concrete base layer; 250 - Coarse sand layer; 260 - Permeable brick layer; 2610 - Brick joints; 270 - Permeable non-woven fabric; 280 - Impermeable geotextile formwork; 300 - Pedestrian overflow structure; 310 - Grating paving; 320 - Overflow pool; 330 - Overflow well; 3310 - Overflow well cover; 3320 - Overflow well wall; 340 - Backfill soil; 3410 - Replacement layer; 3420 - First crushed stone layer; 3430 - Second crushed stone layer; 350 - Overflow pipe; 360 - Casing; 370 - Rainwater pipe; 400 - Curbstone; 410 - Permeable slab. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0029] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0030] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0031] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it have an "or" relationship.

[0032] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0033] It should also 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.

[0034] Example 1 This embodiment introduces a permeable pavement road structure.

[0035] Please refer to Figure 1-3 As shown, Figure 1 This is a top view of a permeable pavement road structure according to this application; Figure 2 This is a plan view of a permeable pavement road structure according to this application; Figure 3 This is a cross-sectional view (AA) of a permeable pavement road structure according to this application; A permeable pavement road structure includes: a vehicular road structure 100 and a pedestrian pavement structure 200, wherein a curbstone 400 is installed between the vehicular road structure 100 and the pedestrian pavement structure 200, and further includes a pedestrian overflow structure 300, wherein the pedestrian overflow structure 300 is located within the pedestrian pavement structure 200 and one side is in close contact with the curbstone 400. The top surface of the pedestrian overflow structure 300 is not higher than the pedestrian pavement structure 200. Both the vehicular road structure 100 and the pedestrian pavement structure 200 are inclined toward the pedestrian overflow structure 300 to facilitate rainwater drainage into the pedestrian overflow structure 300. The pedestrian overflow structure 300 includes a grid-type pavement 310, an overflow pool 320, an overflow pipe 350, and a rainwater pipe 370. The overflow pool 320 is equipped with a grid-type paving 310 on top. The perimeter of the grid-type paving 310 is made of metal, which can provide good support and meet the needs of pedestrian passage. At the same time, the grid-type paving 310 can quickly separate rainwater and fallen leaves to prevent the overflow well 330 from being blocked. An overflow well 330 is installed inside the overflow pool 320. The overflow well 330 receives the rainwater overflowing from the upper layer after being filtered by the overflow pipe 350, the drainage blind pipe 230 and the backfill soil 340, and then flows into the main rainwater pipe through the rainwater pipe 370, thereby flowing into the rainwater collection pool. There is backfill soil 340 between the outer wall of the overflow well 330 and the inner wall of the overflow pool 320. The overflow well 330 is connected to the bottom opening of the side wall of the parallel roadway structure 100 to the rainwater pipe 370. The bottom opening of the side wall of its vertical vehicular road structure 100 is connected to the overflow pipe 350. The other end of the overflow pipe 350 passes through the overflow pool 320 and is longitudinally connected to the adjacent overflow well 330. The rainwater pipe 370 is pre-embedded in the roadway structure 100 and the other end is transversely connected to the main rainwater pipe. The curbstone 400 adjacent to the pedestrian overflow structure 300 has an opening on its side, and a permeable plate 410 is installed in the opening. The length of the permeable plate 410 is not greater than the distance between the inner walls of the overflow pool 320.

[0036] The technical effect of this embodiment is that, through the pedestrian overflow structure, rainwater from the pedestrian pavement and vehicular roads can be collected without affecting the road structure, and the rainwater can be collected into a pre-set rainwater pool for unified utilization. Effective utilization of rainwater can save municipal water resources.

[0037] Example 2 Based on Example 1, this example discloses a further design of a permeable pavement road structure for vehicular roads.

[0038] Please refer to Figure 3 As shown, Figure 3 This is a cross-sectional view (AA) of a permeable pavement road structure according to this application; Furthermore, the road structure 100 consists of, from bottom to top, a road base layer 150, a gravel cushion layer 140, a base layer 130, and a surface layer 120. The road structure 100 also includes a drainage stone assembly 110, which is disposed in close contact with the curb stone 400. The bottom surface of the drainage stone component 110 is located on the base layer 130, and the top surface of the drainage stone component 110 is flush with the bottom of the permeable plate 410.

[0039] Furthermore, the drainage stone component 110 consists of a fine stone concrete leveling layer 1130, a mortar leveling layer 1120, and a flat stone 1110 from bottom to top; the flat stone 1110 slopes from top to bottom toward the permeable plate 410 with a slope of 2% to 5%.

[0040] Furthermore, the base layer 130 includes a porous stabilized crushed stone upper base layer 1310 and a concrete lower base layer 1330, with a sealing layer 1320 provided between the two.

[0041] Furthermore, the sealing layer is made of a waterproof material.

[0042] The technical effects of this embodiment are as follows: The design of the road structure can quickly absorb rainwater from the ground when the rainfall flow is small, preventing rainwater from accumulating on uneven ground or forming streams, which would cause water to splash when vehicles pass by, creating a bad impression on pedestrians and non-motorized vehicle drivers; at the same time, the road structure is equipped with a sealing layer, which can effectively control the amount of rainwater absorbed and prevent excessive rainwater from affecting the roadbed and shortening the service life of the road structure.

[0043] Example 3 Based on Example 1, this example discloses a further design of a pedestrian overflow structure for a permeable pavement road structure.

[0044] Please refer to Figure 3-4 As shown, Figure 3 This is a cross-sectional view (AA) of a permeable pavement road structure according to this application; Figure 4This is a BB cross-sectional view of a permeable pavement road structure according to this application; Furthermore, the overflow pool 320 and the grid-type paving 310 are movably connected; the grid-type paving 310 includes several grid units, the width of the overflow pool 320 is the same as the width of the grid units, and the length of the overflow pool 320 is several times the length of the grid units.

[0045] Furthermore, the grid unit is square, with a width of 60-90cm.

[0046] Furthermore, the number of overflow wells 330 may be one or more.

[0047] Furthermore, the overflow well 330 includes an overflow well cover 3310 and an overflow well wall 3320. The base of the overflow well cover 3310 is fixedly installed on the top of the overflow well wall 3320, and the top cover of the overflow well cover 3310 is movably connected to the base of the overflow well cover 3310.

[0048] Furthermore, the backfill soil 340 consists of a second crushed stone layer 3430, a first crushed stone layer 3420, and a replacement layer 3410 from bottom to top. The particle size of the second crushed stone layer 3430 is 3-5 cm; the particle size of the first crushed stone layer 3420 is 0.5-1 cm; and the medium soil of the replacement layer 3410 is coarse sand, planting soil, and coconut coir in a volume ratio of 4:4:2.

[0049] Furthermore, the backfill soil 340 is planted with vegetation.

[0050] Furthermore, the overflow pipe 350 is a grooved HDPE pipe.

[0051] Furthermore, the permeable plate 410 is a cast iron grate.

[0052] Furthermore, the slope of the vehicular road structure 100 is 1% to 3%; the slope of the pedestrian pavement structure 200 is 1% to 3%.

[0053] The technical advantages of this embodiment are: the pedestrian overflow structure components can be produced in a standardized and modular manner, improving production efficiency. Simultaneously, by planting flood-tolerant and drought-tolerant plants within the overflow pool, the function of purifying rainwater can be better fulfilled.

[0054] Example 4 Based on Example 1, this example discloses a further design of a pedestrian paving structure for a permeable pavement road structure.

[0055] Please refer to Figure 5 As shown, Figure 5 This is a schematic diagram of a pedestrian pavement structure for a permeable pavement road structure according to this application; Furthermore, the pedestrian pavement structure 200 consists of, from bottom to top, a road base layer 210, a crushed stone subbase layer 220, a permeable concrete base layer 240, a coarse sand layer 250, and a permeable brick layer 260. A drainage blind pipe 230 is installed inside the crushed stone subbase layer 220. The drainage blind pipe 230 is connected to the interior of the overflow pool 320 and is used to drain the seepage water in the pedestrian pavement structure 200 into the pedestrian overflow structure 300.

[0056] Furthermore, an impermeable geotextile 280 is provided between the road base layer 210 and the crushed stone cushion layer 220, and a permeable non-woven fabric 270 is provided between the permeable concrete base layer 240 and the coarse sand layer 250.

[0057] Furthermore, a brick gap 2610 is provided between the permeable bricks, and the width of the brick gap 2610 is 3-5mm.

[0058] The technical effects of this embodiment are: it can quickly absorb rainwater from the ground when the rainwater flow is small, preventing accidents caused by slippery road surfaces. At the same time, the pedestrian pavement structure is also equipped with drainage blind pipes, which can discharge rainwater seeping into the pedestrian pavement structure into the pedestrian overflow structure, thus better collecting rainwater from the pedestrian pavement.

[0059] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. Various modifications and variations are possible with the present utility model. Any changes, modifications, substitutions, integrations, and parameter alterations to these embodiments within the spirit and principles of the present utility model fall within the scope of protection of the claims of the present utility model.

Claims

1. A permeable pavement road structure, comprising: A vehicular road structure (100) and a pedestrian pavement structure (200), wherein a curbstone (400) is installed between the vehicular road structure (100) and the pedestrian pavement structure (200), characterized in that it further includes a pedestrian overflow structure (300), wherein the pedestrian overflow structure (300) is located within the pedestrian pavement structure (200) and one side is in close contact with the curbstone (400); The top surface of the pedestrian overflow structure (300) is not higher than the pedestrian pavement structure (200). Both the vehicular road structure (100) and the pedestrian pavement structure (200) are inclined toward the pedestrian overflow structure (300). The curbstone (400) adjacent to the pedestrian overflow structure (300) has an opening on its side, and a permeable plate (410) is installed in the opening. The pedestrian overflow structure (300) includes a grid-type pavement (310), an overflow pool (320), an overflow pipe (350), and a rainwater pipe (370). The overflow pool (320) is topped with a grid-type paving (310); An overflow well (330) is installed inside the overflow pool (320); There is backfill soil (340) between the outer wall of the overflow well (330) and the inner wall of the overflow pool (320). The overflow well (330) is connected to the storm drain (370) through the bottom opening of the side wall of the parallel roadway structure (100). The bottom opening of the side wall of its vertical roadway structure (100) is connected to the overflow pipe (350); The other end of the overflow pipe (350) passes through the overflow pool (320) and is longitudinally connected to the adjacent overflow well (330). The rainwater pipe (370) is pre-embedded in the road structure (100) and the other end is transversely connected to the main rainwater pipe.

2. The permeable pavement road structure according to claim 1, characterized in that, The overflow pool (320) and the grid paving (310) are movably connected; the grid paving (310) includes several grid units, the width of the overflow pool (320) is the same as the width of the grid units, and the length of the overflow pool (320) is several times the length of the grid units.

3. A permeable pavement road structure according to claim 1 or 2, characterized in that, The backfill soil (340) consists of a second crushed stone layer (3430), a first crushed stone layer (3420), and a replacement layer (3410) from bottom to top. The particle size of the second crushed stone layer (3430) is 3-5 cm. The particle size of the first crushed stone layer (3420) is 0.5-1 cm. The medium soil of the replacement layer (3410) is coarse sand, planting soil, and coconut coir, with a volume ratio of 4:4:

2.

4. The permeable pavement road structure according to claim 3, characterized in that, The road structure (100) consists of, from bottom to top, a road base layer (150), a gravel cushion layer (140), a base layer (130), and a surface layer (120). The road structure (100) also includes a drainage stone assembly (110), which is set close to the curb stone (400). The bottom surface of the drainage stone component (110) is located on the base layer (130), and the top surface of the drainage stone component (110) is flush with the bottom of the permeable plate (410).

5. A permeable pavement road structure according to claim 3, characterized in that, The pedestrian pavement structure (200) consists of, from bottom to top, a road base layer (210), a crushed stone cushion layer (220), a permeable concrete base layer (240), a coarse sand layer (250), and a permeable brick layer (260). A drainage blind pipe (230) is installed in the crushed stone cushion layer (220), and the drainage blind pipe (230) is connected to the interior of the overflow pool (320).

6. A permeable pavement road structure according to claim 2, characterized in that, The grid unit is square, with a width of 60-90cm.

7. A permeable pavement road structure according to claim 6, characterized in that, The number of overflow wells (330) is one or more.

8. A permeable pavement road structure according to claim 7, characterized in that, The slope of the vehicular road structure (100) is 1% to 3%; the slope of the pedestrian pavement structure (200) is 1% to 3%.

9. A permeable pavement road structure according to claim 4, characterized in that, The drainage stone component (110) consists of a fine stone concrete leveling layer (1130), a mortar leveling layer (1120), and a flat stone (1110) from bottom to top. The flat stone (1110) slopes from top to bottom toward the permeable board (410) with a slope of 2% to 5%.

10. A permeable pavement road structure according to claim 9, characterized in that, The base layer (130) includes a porous stabilized crushed stone upper base layer (1310) and a concrete lower base layer (1330), with a sealing layer (1320) between them.

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