A semi-pervious pavement drainage structure

Abstract

The present application relates to the field of water-permeable road, and relates to a semi-water-permeable pavement drainage structure, which comprises a water collecting assembly; the water collecting assembly comprises a permeable buried pipe installed at the interface between a water-permeable base layer and a cushion layer and extending to the water-permeable base layer and the cushion layer respectively, a curbstone strip buried in soil at a road side, wherein the curbstone strip is provided with a first water collecting cavity in communication with the permeable buried pipe, and a water collecting well buried in the soil and arranged below the curbstone strip and in communication with the first water collecting cavity through a pipeline; the present application is provided with the permeable buried pipe installed between the water-permeable base layer and the cushion layer, the curbstone strip provided with the first water collecting cavity, the water collecting well, the suspension valve assembly and the overflow pipe installed in the water collecting well, and the water distribution pipe installed in the natural soil base, so that the water trapped by the cushion layer in the semi-water-permeable road can be efficiently collected and evenly diffused into the natural soil base below the rammed soil layer through the water collecting well and the water distribution pipe, thereby avoiding the rainwater from infiltrating the rammed soil layer to wash away the roadbed and reduce the stability of the roadbed.

Description

Technical Field

[0001] This invention relates to the field of permeable roads, and more specifically, to a semi-permeable pavement drainage structure. Background Technology

[0002] While permeable base courses on rigid pavements can effectively remove water seeping into the pavement, they also increase the possibility of water that has seeped into the pavement structure continuing to infiltrate downwards through the permeable base course. Therefore, an impermeable subbase (impermeable subbase) must be installed beneath the permeable base course to prevent surface water from seeping into the subgrade and affecting its strength and stability.

[0003] Traditional roadbed and pavement base materials are low-permeability materials without drainage structures. Free water that seeps into the pavement structure is difficult to drain away from the bottom or sides of the roadbed, remaining trapped inside the structure for a long time. This causes the roadbed and structural layer materials to become wetted, reducing their strength and decreasing the road structure's load-bearing capacity. Under the coupled action of traffic loads, this may endanger the stability of the pavement structure and the safe use of the road. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a semi-permeable pavement drainage structure that can realize rapid drainage of semi-permeable roads, improve drainage efficiency, and ensure roadbed safety.

[0006] Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A semi-permeable pavement drainage structure includes a natural subgrade and, constructed sequentially from bottom to top, a rammed earth layer, an impermeable layer, a subbase, a permeable base course, and a permeable surface layer, further comprising:

[0009] The water collection component includes a water collection component and a water distribution component. The water collection component includes a permeable underground pipe installed at the junction of the permeable base layer and the subbase layer and extending to the permeable base layer and the subbase layer respectively; a curb stone strip buried in the roadside soil, with the curb stone strip having a first water collection cavity connected to the permeable underground pipe; and a water collection well buried in the soil and located below the curb stone strip and connected to the first water collection cavity through a pipe.

[0010] The water distribution assembly includes a water distribution pipe buried in the natural soil foundation, a second drain pipe connecting the water distribution pipe and the collection well; the collection well is equipped with a seepage regulation component;

[0011] The seepage volume regulating component includes a suspension valve assembly installed at the connection between the second drain pipe and the collection well, and an overflow pipe installed on the side of the collection well away from the suspension valve assembly. The suspension valve assembly includes a hemispherical cover installed at the connection between the second drain pipe and the collection well, a hemispherical valve nested inside the hemispherical cover and hinged to the hemispherical cover, a connecting rod fixedly connected to the front end of the hemispherical valve, and a float fixedly connected to the end of the connecting rod away from the hemispherical valve.

[0012] The overflow pipe is a siphon pipe. The outlet of the overflow pipe is located inside the water collection well at the same height as the hemispherical valve, and the outlet of the outer end of the overflow pipe is lower than the lower end face of the water collection well.

[0013] As a further aspect of the present invention, it also includes a second drainage structure, which includes a second water collection cavity opened on the upper part of the curbstone strip and with its opening higher than the permeable surface layer, and a third drain pipe connecting the second water collection cavity to the first drain pipe.

[0014] As a further aspect of the present invention: an intermediate padding layer is filled between the permeable underground pipes to isolate the permeable base layer and the padding layer.

[0015] As a further aspect of the present invention: the infiltration pipe is a circular pipe horizontally arranged along the width of the road, and the upper part of the infiltration pipe has uniformly distributed seepage holes, which are tapered through holes that are narrow on the outside and wide on the inside.

[0016] As a further aspect of the present invention, a semi-circular groove is provided on the contact surface of both the permeable base layer and the subbase layer.

[0017] As a further aspect of the present invention: the hemispherical cover is a hollow hemispherical cover, the hemispherical valve is a hemispherical structure, and the hemispherical valve is hinged to the inner wall of the hemispherical cover through a connecting shaft.

[0018] As a further aspect of the present invention: both the first water collection chamber and the second water collection chamber are strip-shaped grooves, and a filter screen is nested inside the opening of the second water collection chamber facing the road surface.

[0019] As a further aspect of the present invention: the third drain pipe is a vertically arranged strip pipe, the first water collection chamber and the third drain pipe are connected through a second drain pipe at a right angle, and the second drain pipe and the third drain pipe are vertically connected.

[0020] As a further aspect of the present invention: the water distribution pipe is a cylindrical pipe buried in the natural soil foundation, and a water distribution hole is provided on the lower circumferential outer wall of the water distribution pipe.

[0021] As a further aspect of the present invention: a construction process for a semi-permeable pavement drainage structure includes the following steps:

[0022] Step 1: Use excavation equipment to dig a strip trench and use a pipe laying machine to bury the water distribution pipe in the natural soil foundation;

[0023] Step two: Backfill the excavated trench and intermittently compact it using tamping equipment and road rollers to form a rammed soil layer;

[0024] Step 3: Use dense-graded cement-stabilized gravel to pour and form an impermeable layer;

[0025] Step 4: Use asphalt sand to pour the subbase, and reserve equally spaced strip grooves during the pouring of the subbase;

[0026] Step 5: Place the infiltration pipe in the strip groove of the subbase, then pour the intermediate subbase, the height of which is less than the radius of the infiltration pipe; finally, pour the permeable base layer with graded crushed stone.

[0027] Step 6: Use fine-grained asphalt concrete to create a permeable surface layer;

[0028] Step 7: Bury curb stones and water collection wells on the side of the road, and connect the first, second and third drain pipes. Beneficial effects

[0029] Compared with the prior art, the advantages of this invention are:

[0030] (1) The present invention provides a permeable underground pipe installed between the permeable base layer and the subbase layer, a curb stone strip with a first water collection chamber, a water collection well, a suspension valve assembly and an overflow pipe installed in the water collection well, and a water distribution pipe installed in the natural soil foundation. This invention efficiently collects water trapped by the subbase layer in the semi-permeable road and distributes the water evenly to the natural soil foundation below the rammed earth layer through the water collection well and the water distribution pipe. This prevents rainwater from seeping into the rammed earth layer and destroying the roadbed, thus reducing the stability of the roadbed.

[0031] (2) The present invention is equipped with a suspension valve assembly and an overflow pipe that is a siphon. During the rainy season, a large amount of rainwater enters the water collection well. In order to avoid the water pressure in the water distribution pipe from the water collection well being too high, when the water volume in the water collection well is large, the liquid level rises and pushes the float to move upward. The float drives the hemispherical valve to rotate through the connecting rod. The hemispherical valve closes the hemispherical cover to prevent rainwater from continuing to enter the water distribution pipe.

[0032] (3) The present invention collects rainwater that may accumulate on the permeable surface layer by setting a curb stone strip with a second water collection cavity, so as to avoid rainwater accumulation on the permeable surface layer and causing vehicles to slip. The second drainage mechanism solves the problem of rainwater not infiltrating in time during heavy rainfall, and further ensures the road drainage effect.

[0033] (4) The present invention avoids direct contact between the permeable base layer and the subbase layer by pouring an intermediate subbase layer between the permeable underground pipes, avoids direct rainwater infiltration of the subbase layer, improves the water-proof performance of the subbase layer, and further protects the roadbed.

[0034] (5) The present invention provides a permeable pipe with a narrow outer and wide inner permeable hole and an intermediate padding layer, so that rainwater can efficiently enter the permeable pipe from the permeable hole.

[0035] (6) The present invention provides a first drain pipe at a right angle and a third drain pipe at a vertical position, so that when the rainfall is large, the rainwater enters the water collection well quickly through the vertical third drain pipe and creates a negative pressure effect on the rainwater in the first water collection chamber through the first drain pipe at a right angle, thereby increasing the water collection speed of the first water collection chamber. Attached Figure Description

[0036] Figure 1 This is a three-dimensional cross-sectional view of the structure from the left side of the present invention;

[0037] Figure 2 This is a three-dimensional cross-sectional view of the structure from the right side of the present invention;

[0038] Figure 3 This is a three-dimensional cross-sectional view of the structure from the front perspective of the present invention;

[0039] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0040] Figure 5 This is a schematic diagram of the assembly structure of the permeation tube in this invention;

[0041] Figure 6 This is a schematic diagram of the internal three-dimensional cross-sectional structure of the present invention;

[0042] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0043] Figure 8 This is a three-dimensional structural diagram of the suspension valve assembly in this invention;

[0044] Figure 9 This is a schematic diagram of the assembly structure of the curbstone strips and the water collection well in this invention;

[0045] Figure 10 for Figure 6 A magnified structural diagram at point C.

[0046] Explanation of the labels in the diagram:

[0047] 1. Permeable surface layer; 2. Permeable base layer; 3. Subbase layer; 4. Intermediate subbase layer; 5. Impermeable layer; 6. Rammed earth layer; 7. Natural soil foundation; 8. Permeable underground pipe; 801. Seepage hole; 9. Curbstone strip; 901. First water collection chamber; 902. Second water collection chamber; 10. First drain pipe; 11. Water collection well; 12. Second drain pipe; 13. Water distribution pipe; 14. Hemispherical cover; 15. Hemispherical valve; 16. Connecting rod; 17. Float; 18. Overflow pipe; 19. Third drain pipe. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Please see Figure 1-10 In one embodiment of the present invention, a semi-permeable pavement drainage structure includes a natural soil base 7 and, constructed sequentially from bottom to top, a rammed earth layer 6, an impermeable layer 5, a subbase 3, a permeable base course 2, and a permeable surface layer 1, comprising:

[0052] The water collection component includes a water collection assembly and a water distribution assembly. The water collection assembly includes an infiltration pipe 8 installed at the junction of the permeable base layer 2 and the subbase layer 3 and extending to the permeable base layer 2 and the subbase layer 3 respectively; a curb stone strip 9 buried in the roadside soil, and the curb stone strip 9 has a first water collection cavity 901 connected to the infiltration pipe 8; and a water collection well 11 buried in the soil and located below the curb stone strip 9 and connected to the first water collection cavity 901 through a pipe.

[0053] The water distribution assembly includes a water distribution pipe 13 buried in the natural soil foundation 7 and a second drain pipe 12 connecting the water distribution pipe 13 and the water collection well 11; the water collection well 11 is equipped with a seepage adjustment component;

[0054] The seepage volume regulating component includes a suspension valve assembly installed at the connection between the second drain pipe 12 and the collection well 11, and an overflow pipe 18 installed on the side of the collection well 11 away from the suspension valve assembly. The suspension valve assembly includes a hemispherical cover 14 installed at the connection between the second drain pipe 12 and the collection well 11, a hemispherical valve 15 nested in the hemispherical cover 14 and hinged to the hemispherical cover 14, a connecting rod 16 fixedly connected to the front end of the hemispherical valve 15, and a float 17 fixedly connected to the end of the connecting rod 16 away from the hemispherical valve 15.

[0055] The overflow pipe 18 is a siphon pipe. The outlet of the overflow pipe 18 located inside the water collection well 11 is at the same height as the hemispherical valve 15, and the outlet of the outer end of the overflow pipe 18 is lower than the lower end face of the water collection well 11.

[0056] Specifically, when rainwater enters the subbase 3 through the permeable surface layer 1 and the permeable base layer 2, the subbase 3 intercepts the rainwater. The intercepted rainwater enters the first water collection chamber 901 of the curbstone strip 9 through the infiltration pipe 8, and then enters the water collection well 11 through the pipe for centralized collection. The collected rainwater enters the distribution pipe 13 through the second drain pipe 12 and slowly infiltrates into the natural soil base 7.

[0057] To prevent excessive water volume in the collection well 11 during heavy rain, which could cause excessive water pressure entering the distribution pipe 13 and impacting the natural soil foundation 7, rainwater accumulates in the collection well 11 when the water volume is high. As the liquid level rises, the float ball 17 drives the hemispherical valve 15 to rotate inside the hemispherical cover 14 via the connecting rod 16, thereby sealing the passage from the collection well 11 to the second drain pipe 12. At the same time, the rainwater is discharged through the overflow pipe 18, ensuring that rainwater continues to infiltrate and preventing water accumulation on the surface of the permeable surface layer 1. This also reduces the wetting of the subbase layer 3 by rainwater, ensuring the structural stability and service life of the subbase layer 3, and further improving the safety of the roadbed.

[0058] It should be noted that the outlet of the overflow pipe 18 is connected to the municipal pipeline or the city's water system to ensure that rainwater is promptly removed from the road.

[0059] In this embodiment, an intermediate pad 4 is filled between the permeable base layer 2 and the pad layer 3 to isolate the permeable base layer 2 and the pad layer 3.

[0060] Specifically, by filling the spaces between the permeable underground pipes 8 and between the permeable base layer 2 and the subbase layer 3 with an intermediate subbase layer 4, the retention of rainwater between the permeable base layer 2 and the subbase layer 3 is reduced, the contact area and contact time between rainwater and the subbase layer 3 are reduced, and the drainage efficiency is improved.

[0061] In this embodiment, the infiltration pipe 8 is a circular pipe horizontally arranged along the width of the road, and the upper part of the infiltration pipe 8 is provided with uniformly distributed seepage holes 801, which are tapered through holes that are narrow on the outside and wide on the inside.

[0062] Specifically, rainwater can more easily penetrate the underground pipe 8 through the narrow outer and wide inner seepage holes 801 for rapid collection.

[0063] In this embodiment, the permeable base layer 2 and the padding layer 3 both have semi-circular grooves on their contact surfaces.

[0064] Specifically, semi-circular grooves are provided on the contact surfaces of the permeable base layer 2 and the cushion layer 3 to facilitate the accommodation of the infiltration pipe 8. At the same time, the contact positions of the lower end face of the permeable base layer 2 and the upper end face of the cushion layer 3 are both arched structures to improve the stability of the support and the strength of the contact surface.

[0065] In this embodiment, the hemispherical cover 14 is a hollow hemispherical cover, and the hemispherical valve 15 is a hemispherical structure. The hemispherical valve 15 is hinged to the inner wall of the hemispherical cover 14 through a connecting shaft.

[0066] Specifically, this facilitates the rotation and reset of the hemispherical valve 15 under the action of the connecting rod 16 and the float 17.

[0067] In this embodiment, the water distribution pipe 13 is a cylindrical pipe buried in the natural soil foundation, and a water distribution hole is provided on the lower circumferential outer wall of the water distribution pipe 13.

[0068] Specifically, rainwater enters the natural soil foundation 7 evenly through the water distribution holes on the lower end face of the water distribution pipe 13, avoiding water concentration, ensuring the infiltration rate, and preventing the roadbed from being washed away.

[0069] In another embodiment of the present invention, the semi-permeable pavement drainage structure further includes a second drainage structure, the second drainage structure including a second water collection cavity 902 opened on the upper part of the curb stone strip 9 and with an opening higher than the permeable surface layer 1, and a third drain pipe 19 connecting the second water collection cavity 902 to the first drain pipe 10.

[0070] Specifically, by providing a second water collection chamber 902, water on the permeable surface layer 1 is collected in a timely manner to avoid water accumulation on the road surface. The additional drainage structure improves efficiency and ensures drainage speed.

[0071] In this embodiment, both the first water collection chamber 901 and the second water collection chamber 902 are strip-shaped grooves, and a filter screen is nested inside the opening of the second water collection chamber 902 facing the road surface.

[0072] Specifically, this prevents road debris from entering the second water collection chamber 902.

[0073] In this embodiment, the third drain pipe 19 is a vertically arranged strip pipe, and the first water collection chamber 901 and the third drain pipe 19 are connected by a first drain pipe 10 at a right angle, and the first drain pipe 10 and the third drain pipe 19 are vertically connected.

[0074] Specifically, through the vertically installed third drain pipe 19 and the right-angled first drain pipe 10, when the water volume is large, the first part of the water flow, rainwater flowing through the second water collection chamber 902, falls rapidly through the third drain pipe 19, while the second part of the water flow flows into the first water collection chamber 901 through the permeable surface layer 1, the permeable base layer 2, and the infiltration pipe 8. At this time, the flow velocity of the second part of the water is smaller after passing through the permeable surface layer 1, the permeable base layer 2, and the infiltration pipe 8. The first part of the water flow and the second part of the water flow are in the third drain pipe... At the contact and confluence point of pipe 19 and the first drain pipe 10, the flow velocity of the first part of the water flow is greater than that of the second part of the water flow, that is, the pressure inside the third drain pipe 19 is less than that inside the first drain pipe 10. The third drain pipe 19 forms a negative pressure suction on the water flow of the first drain pipe 10, thereby increasing the drainage speed of the first drain pipe 10. At the same time, the first drain pipe 10 performs negative pressure suction on the water flow in the infiltration pipe 8, thereby increasing the infiltration speed of rainwater in the permeable surface layer 1 and the permeable base layer 2, and improving the road surface drainage speed.

[0075] In another embodiment of the present invention, the construction process of the semi-permeable pavement drainage structure includes the following steps:

[0076] Step 1: Use excavation equipment to dig a strip trench and use a pipe laying machine to bury the water distribution pipe 13 in the natural soil foundation 7;

[0077] Step 2: Backfill the excavated strip trench and compact it intermittently using tamping equipment and road rollers to form rammed soil layer 6;

[0078] Step 3: Use dense-graded cement-stabilized gravel to pour and form an impermeable layer 5;

[0079] Step 4: Asphalt sand is used to pour the subbase 3, and equally spaced strip grooves are reserved during the pouring of subbase 3.

[0080] Step 5: Place the infiltration pipe 8 in the strip groove of the subbase 3, then pour the intermediate subbase 4, the height of which is less than the radius of the infiltration pipe 8; finally, pour the permeable base layer 2 with graded crushed stone.

[0081] Step 6: Use fine-grained asphalt concrete to construct the permeable surface layer 1;

[0082] Step 7: Install curb stones 9 and water collection wells 11 on the side of the road, and connect the first drain pipe 10, the second drain pipe 12 and the third drain pipe 19.

[0083] Specifically, the above steps minimize construction difficulty and ensure standardized construction procedures.

[0084] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A semi-permeable pavement drainage structure, comprising a natural soil base (7) and, constructed sequentially from bottom to top from the natural soil base (7), a rammed earth layer (6), an impermeable layer (5), a subbase (3), a permeable base course (2), and a permeable surface layer (1), characterized in that, include: The water collection component and the water distribution component include a permeable underground pipe (8) installed at the junction of the permeable base layer (2) and the subbase layer (3) and extending to the permeable base layer (2) and the subbase layer (3) respectively; a curb stone strip (9) buried in the roadside soil, and the curb stone strip (9) has a first water collection cavity (901) connected to the permeable underground pipe (8); and a water collection well (11) buried in the soil and located below the curb stone strip (9) and connected to the first water collection cavity (901) through a pipe. The water distribution assembly includes a water distribution pipe (13) buried in the natural soil foundation (7) and a second drain pipe (12) connecting the water distribution pipe (13) and the water collection well (11); the water collection well (11) is equipped with a seepage adjustment component; The seepage volume regulating component includes a suspension valve assembly installed at the connection between the second drain pipe (12) and the collection well (11) and an overflow pipe (18) installed on the side of the collection well (11) away from the suspension valve assembly. The suspension valve assembly includes a hemispherical cover (14) installed at the connection between the second drain pipe (12) and the collection well (11), a hemispherical valve (15) nested in the hemispherical cover (14) and hinged to the hemispherical cover (14), a connecting rod (16) fixedly connected to the front end of the hemispherical valve (15), and a float (17) fixedly connected to the end of the connecting rod (16) away from the hemispherical valve (15). The overflow pipe (18) is a siphon pipe. The outlet of the overflow pipe (18) located inside the water collection well (11) is at the same height as the hemispherical valve (15). The outlet of the outer end of the overflow pipe (18) is lower than the lower end face of the water collection well (11). It also includes a second drainage structure, which includes a second water collection chamber (902) opened on the upper part of the curbstone strip (9) and with an opening higher than the permeable surface layer (1), and a third drain pipe (19) connecting the second water collection chamber (902) to the first drain pipe (10); The third drain pipe (19) is a vertically arranged strip pipe, and the first water collection chamber (901) and the third drain pipe (19) are connected by the first drain pipe (10) at a right angle; The water distribution pipe (13) is a cylindrical pipe buried in the natural soil foundation and has a water distribution hole that penetrates the water distribution pipe (13) on the lower circumferential outer wall.

2. The semi-permeable pavement drainage structure according to claim 1, characterized in that: The spaces between the permeable underground pipes (8) are filled with an intermediate cushion layer (4) that isolates the permeable base layer (2) and the cushion layer (3).

3. The semi-permeable pavement drainage structure according to claim 2, characterized in that: The infiltration pipe (8) is a circular pipe that is horizontally arranged along the width of the road. The upper part of the infiltration pipe (8) is provided with uniformly distributed seepage holes (801). The seepage holes (801) are tapered through holes that are narrow on the outside and wide on the inside.

4. The semi-permeable pavement drainage structure according to claim 3, characterized in that: The permeable base layer (2) and the subbase layer (3) both have semi-circular grooves at their contact surfaces.

5. A semi-permeable pavement drainage structure according to claim 4, characterized in that: The hemispherical cover (14) is a hollow hemispherical cover, and the hemispherical valve (15) is a hemispherical structure. The hemispherical valve (15) is hinged to the inner wall of the hemispherical cover (14) through a connecting shaft.

6. A semi-permeable pavement drainage structure according to claim 5, characterized in that: Both the first water collection chamber (901) and the second water collection chamber (902) are strip-shaped grooves, and a filter screen is nested inside the opening of the second water collection chamber (902) facing the road surface.

7. A semi-permeable pavement drainage structure according to claim 6, characterized in that: The construction process of the semi-permeable pavement drainage structure includes the following steps: Step 1: Use excavation equipment to dig a strip trench and use a pipe laying machine to bury the water distribution pipe (13) in the natural soil foundation (7); Step 2: Backfill the excavated strip trench and compact it intermittently using tamping equipment and road rollers to form a rammed soil layer (6); Step 3: Use dense-graded cement-stabilized gravel to pour and form an impermeable layer (5); Step 4: Asphalt sand is used to pour the cushion layer (3), and equally spaced strip grooves are reserved during the pouring of the cushion layer (3); Step 5: Place the infiltration pipe (8) in the strip groove of the pad (3), and then pour the intermediate pad (4). The height of the intermediate pad (4) is less than the radius of the infiltration pipe (8). Finally, use graded crushed stone to pour the permeable base layer (2). Step 6: Use fine-grained asphalt concrete to construct a permeable surface layer (1); Step 7: Bury curb stones (9) and water collection wells (11) on the side of the road, and connect the first drain pipe (10), the second drain pipe (12) and the third drain pipe (19).

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