A rainwater collection and utilization system for sponge city slope roads

Abstract

The present invention discloses a rainwater collection and utilization system for a sponge city slope road, which includes a motor vehicle lane, a sidewalk and a grassed swale arranged from the road center to both sides; an impervious asphalt filling colloid is arranged in the permeable motor vehicle lane to realize the diversion of ground seepage water, and the rainwater runoff on the ground is diverted through the water guiding and decelerating belt arranged on the motor vehicle lane and flows into the rainwater well; after the rainwater enters the rainwater well, it is initially purified by a flow-through device and flows into the water storage module arranged underground in the sidewalk through an overflow pipe for storage, and the excess rainwater flows into the municipal pipe network; after the water storage module is full of rainwater, it can flow into the infiltration well arranged in the grassed swale along the corresponding overflow pipe; a plastic water retaining wall is also arranged on the grassed swale to hinder the rainwater runoff in the grassed swale. The present invention can reduce the amount of rainwater flowing from the slope section to the flat section during heavy rain, relieve the waterlogging disaster in the flat area, delay the peak of the rain flood in the flat area, and enhance the anti-waterlogging ability of the sponge city road.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater collection in sponge cities, and particularly relates to a rainwater collection and utilization system for sloped roads in sponge cities. Background Art

[0002] The road surface permeability decreases with the increase of the hardened area. Moreover, the traditional road rainwater drainage system mainly discharges through urban pipelines. When the rainfall increases, the drainage pressure of the municipal pipe network surges easily, resulting in untimely drainage. At the same time, the stock of green spaces decreases, and the rainwater infiltration capacity reduces. Under the influence of the above factors, the urban rainwater adaptability decreases, and urban waterlogging frequently occurs during the rainy season.

[0003] To alleviate the above problems, the Ministry of Housing and Urban-Rural Development has proposed to enhance the rainwater in-situ consumption and retention capacity by constructing sponge cities. However, the existing rainwater collection systems in sponge cities are mainly designed and renovated for flat areas, and there are no specific measures for the design and renovation of sloped road sections in sponge cities. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the above-mentioned prior background art and provide a rainwater collection and utilization system for sloped roads in sponge cities.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a rainwater collection and utilization system for sloped roads in sponge cities, including a motor vehicle lane with drainage and infiltration functions, a sidewalk, and a grassed swale arranged in sequence from the road center to both sides of the road. The motor vehicle lane consists of a permeable road surface layer, a stabilized crushed stone cushion layer, and a compacted plain soil layer from top to bottom. In the permeable road surface layer, impervious asphalt filling colloids perpendicular to the road surface are arranged at equal intervals. A water guiding deceleration strip is provided on the motor vehicle lane surface directly above the impervious asphalt filling colloids. The two ends of the water guiding deceleration strip are spaced from the sidewalk. Rainwater wells extending longitudinally underground are provided on the downward side of the two ends of the water guiding deceleration strip on the motor vehicle lane, and the rainwater wells are connected to the municipal pipe network; the sidewalk consists of a sidewalk permeable brick layer, a permeable concrete mattress layer, a stabilized crushed stone cushion layer, and a compacted plain soil layer from top to bottom, and a water storage module one is arranged in the compacted plain soil layer below the sidewalk. A pumping well extending longitudinally underground is provided on the sidewalk, and the lower end of the pumping well is inserted into the water storage module one; the grassed swale consists of a covering layer, a planting layer, a sand layer, a gravel layer, and a compacted plain soil layer from top to bottom. An infiltration well arranged longitudinally is provided in the grassed swale, and the infiltration well is connected to the municipal pipe network. The upper end of the infiltration well is higher than the surface of the covering layer of the grassed swale; the above-mentioned rainwater wells, pumping wells, water storage module one, and infiltration wells are interconnected through overflow pipes.

[0006] Further, the water-conducting speed bump strips are horizontally arranged on the motor vehicle lane, perpendicular to the sidewalk, and there are multiple of them, arranged at intervals; multiple water-conducting speed bumps are connected in series in each water-conducting speed bump strip, and each water-conducting speed bump is provided with multiple fixing holes, and expansion screws pass through the corresponding fixing holes to fix the water-conducting speed bump on the motor vehicle lane; each water-conducting speed bump is internally provided with a water-conducting groove running through its length direction, and a water inlet is provided on the side of the water-conducting speed bump facing the top of the slope, and the inner end of the water inlet is communicated with the water-conducting groove; the outer edges of the water-conducting speed bumps at both ends of each water-conducting speed bump strip are arranged in a semi-circular shape.

[0007] Further, the rainwater well is made of concrete, and a rainwater grate is installed at the upper opening; three drain outlets are provided in the rainwater well, and an overflow pipe leading to the municipal pipeline, an overflow pipe leading to the water storage module one, and a municipal sewage pipe are connected in sequence from top to bottom.

[0008] Further, the permeable pavement layer of the motor vehicle lane includes a permeable concrete surface layer and a permeable concrete cushion layer, and the permeable concrete surface layer covers the upper part of the permeable concrete cushion layer.

[0009] Further, a water storage module two is arranged underground below the planting layer of the grassed swale; the infiltration well of the grassed swale is made of permeable concrete, and the infiltration well is provided with two water outlets, which are an overflow pipe connecting to the water storage module two and a municipal sewage pipe in sequence from top to bottom. A filter sand net is added at the water outlet of the overflow pipe from the infiltration well to the water storage module two, and a trash basket is detachably installed at the upper overflow port of the infiltration well.

[0010] Further, a plastic water retaining wall is also arranged in the grassed swale, and the bottom of the plastic water retaining wall is communicated with the water storage module two below the grassed swale; the plastic water retaining wall is provided with a water inlet hole, a water collecting trough, a pumping hole, and an irrigation nozzle. The water inlet hole is arranged on the front side of the plastic water retaining wall, and a sand retaining net is added at the outer end inlet; the irrigation nozzle is arranged at the upper part of the plastic water retaining wall, and its water inlet end is connected to the water storage module two through a flexible water pipe; the pumping holes are arranged on the back of the plastic water retaining wall and are connected to the water storage module two through a flexible pumping pipe.

[0011] Further, the water storage module one and the water storage module two have the same structural layout, and both are protected by a permeable concrete protective layer on the outside. A permeable geotextile is arranged in the upper gap between the permeable concrete protective layer and the water storage module, and a waterproof geotextile is arranged in the side gap and bottom gap between the two.

[0012] Further, the plastic water retaining wall is made of PPS material; the sand retaining net equipped with the water inlet hole on the plastic water retaining wall is made of nylon material.

[0013] Further, a sand retaining net is externally attached to the covering layer of the grassed swale.

[0014] Furthermore, a plurality of diagonal braces are provided on the back of the plastic water retaining wall, and the pumping holes can be arranged on the diagonal braces, and the opening direction is perpendicular to the plastic water retaining wall.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses measures such as asphalt filling colloid, water guiding deceleration belt, and plastic water retaining wall to block and divert underground seepage and road surface runoff, so that it is discharged into the water storage module and municipal pipeline according to the designed path, completing the automatic collection, preliminary purification and relatively flexible utilization of rainwater, and reasonably utilizing rainwater resources; When facing heavy rain, it can reduce the amount of rainwater flowing from the slope section to the gentle section, relieve the waterlogging disaster in the gentle area, and delay the peak of the rain flood in the gentle area; At the same time, by increasing the volume and number of water storage modules, the pressure on the municipal pipeline caused by heavy rain is relieved, and the anti-waterlogging ability of the sponge city road is enhanced, saving both labor costs and time costs, and improving the early treatment efficiency and recycling rate of urban rainwater resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic plan view of the system of the present invention (only showing one side of the sidewalk and the grass planting ditch);

[0017] Figure 2 It is a schematic longitudinal sectional view of the motor vehicle lane in the present invention;

[0018] Figure 3 It is a schematic longitudinal sectional view at the rainwater well of the motor vehicle lane in the present invention;

[0019] Figure 4 It is a schematic cross-sectional view at the pumping well of the sidewalk in the present invention;

[0020] Figure 5 It is a schematic cross-sectional view at the infiltration well of the grass planting ditch in the present invention;

[0021] Figure 6 It is a top view of the water guiding deceleration belt (excerpt) in the present invention;

[0022] Figure 7 It is an end view of the water guiding deceleration belt in the present invention;

[0023] Figure 8 It is a sectional view of the fixing part of the water guiding deceleration belt in the present invention;

[0024] Figure 9 It is a sectional view at the water inlet of the water guiding deceleration belt in the present invention;

[0025] Figure 10 It is a layout diagram of the underground connection of the slope road rainwater collection and utilization system of the present invention;

[0026] Figure 11 It is a longitudinal sectional view of the grass planting ditch with a plastic water retaining wall added in the present invention;

[0027] Figure 12 Front view of the plastic water retaining wall in the present invention;

[0028] Figure 13 Top view of the plastic water retaining wall in the present invention;

[0029] Figure 14 Side view of the plastic water retaining wall in the present invention;

[0030] Figure 15 Rear view of the plastic water retaining wall in the present invention;

[0031] Figure 16 Transverse cross-sectional view of the plastic water retaining wall in the present invention;

[0032] Figure 17 Longitudinal cross-sectional view of the plastic water retaining wall in the present invention;

[0033] In the figure: 1. Motor vehicle lane, 2. Sidewalk, 3. Grass planting ditch, 4. Water guiding and decelerating belt, 5. Rainwater well, 6. Pumping well, 7. Side curb of sidewalk, 8. Infiltration well, 9. Plastic water retaining wall, 11. Permeable concrete surface layer, 12. Permeable concrete cushion layer, 13. Stable crushed stone cushion layer, 14. Rammed plain soil layer, 15. Impermeable asphalt filling colloid, 21. Permeable brick layer of sidewalk, 22. Water storage module one, 23. Permeable concrete protective layer, 24. Overflow pipe (connected to infiltration well), 31. Covering layer, 32. Planting layer, 33. Sand layer, 34. Crushed stone layer, 35. Water storage module two, 36. Permeable concrete protective layer, 41. Decelerating belt body, 42. Water inlet, 43. Water guiding groove, 44. Expansion screw, 51. Rainwater grate, 52. Overflow pipe (connected to municipal pipe network), 53. Overflow pipe (connected to water storage module one), 54. Municipal sewage pipe, 61. Cast iron manhole cover, 81. Overflow port, 82. Trash basket, 83. Overflow pipe (connected to water storage module two), 84. Municipal sewage pipe, 91. Water inlet hole, 92. Irrigation sprinkler, 93. Water collecting trough, 94. Pumping channel, 95. Flexible water pipe, 96. Flexible pumping pipe, 97. Pumping hole, 98. Sand retaining net, 99. Diagonal brace body. Detailed implementation manners

[0034] It should be noted that in the description of the present invention, the structures, ratios, sizes, etc. shown in the specification drawings are only used to cooperate with the content shown in the specification for professionals to read and use, and are not used as restrictive conditions to limit the invention patent of the present invention; without any change in technical essence, any modification of the structure or change in the proportional relationship, without affecting the effects that the present invention can produce and the purposes that can be achieved, should fall within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "front", "rear", "middle" in the specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational words determined for the convenience of describing the structural relationships of the various components of the present invention, and do not specifically refer to any component of the present invention that must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation to the present invention.

[0035] The following further details the specific embodiments of the present invention with reference to the drawings:

[0036] Embodiment 1

[0037] As Figures 1 to 5 shown, a sponge city slope road rainwater collection and utilization system includes a motor vehicle lane 1 with a drainage and infiltration function, a sidewalk 2, and a grassed swale 3 arranged in sequence from the road center to both sides of the road. The main structure of the motor vehicle lane 1 is paved from top to bottom with a permeable pavement layer, a stabilized crushed stone cushion layer 13, and a compacted plain soil layer 14. The permeable pavement layer includes a permeable concrete surface layer 11 and a permeable concrete cushion layer 12. The permeable concrete surface layer 11 tightly covers the upper part of the permeable concrete cushion layer 12 to enhance the drainage and infiltration capacity of the road surface. A plurality of impervious asphalt filling colloids 15 perpendicular to the road surface are arranged at equal intervals in the permeable pavement layer. A corresponding water guiding deceleration strip is provided on the motor vehicle lane surface directly above the impervious asphalt filling colloid 15. A plurality of water guiding deceleration strips are arranged horizontally at equal intervals and are parallel to each other. The set length is slightly shorter than the width of the motor vehicle lane 1. The two ends of the water guiding deceleration strips are spaced from the sidewalks 2 on both sides. Rainwater wells 5 extending longitudinally underground are provided on the downward side (i.e., the downhill side) of the motor vehicle lane 1 at both ends of each water guiding deceleration strip. The rainwater wells 5 are connected to the municipal pipe network. A rainwater grate 51 is installed at the upper opening of the rainwater well 5 to facilitate drainage and prevent other things from falling in, causing potential safety hazards. The rainwater well 5 is made of concrete and is provided with three drainage ports, which are connected in sequence from top to bottom to an overflow pipe 52 leading to the municipal pipe, an overflow pipe 53 leading to the water storage module one 22, and a municipal sewage pipe 54.

[0038] Combined with Figures 6 to 9As shown in the figure, each water-conducting speed bump strip is formed by connecting multiple water-conducting speed bumps 4 in series. The water-conducting speed bump 4 includes a speed bump body 41 with an upper arc-shaped cross-section. On the upper and lower sides of the speed bump body 41, a plurality of fixing holes are symmetrically arranged. The water-conducting speed bump 4 is fixed to the motor vehicle lane 1 by passing expansion screws 44 through the corresponding fixing holes. Inside the speed bump body 41 of the water-conducting speed bump 4, there is a water-conducting groove 43 running through its length direction. On the upper side (the side facing the top of the slope) of the speed bump body 41, there is a water inlet 42, and the inner end of the water inlet 42 is connected to the water-conducting groove 43. The outer edges of the two water-conducting speed bumps 4 at both ends of the water-conducting speed bump strip are both arranged in a semi-circular arc to form a gentle slope transition to avoid damage or collision to moving vehicles and pedestrians.

[0039] A sidewalk curbstone 7 is laid between the sidewalk 2 and the motor vehicle lane 1 for zoning. The main structure of the sidewalk 2 is laid from top to bottom in sequence as a sidewalk permeable brick layer 21, a permeable concrete cushion layer 12, a stabilized gravel cushion layer 13, and a compacted plain soil layer 14. The sidewalk permeable brick layer 21 is flush with the upper end of the sidewalk curbstone 7. And a water storage module one 22 is arranged in the compacted plain soil layer 14 below the sidewalk 2. The outside of the water storage module one 22 is protected by a permeable concrete protective layer 23. Among them, a permeable geotextile is arranged in the upper gap between the permeable concrete protective layer 23 and the water storage module one 22, and a waterproof geotextile is arranged in the side and bottom gaps between the two. A pumping well 6 extending longitudinally into the ground is provided on the sidewalk 2. The main body is made of PVC material. An iron manhole cover 61 is installed at the upper opening of the pumping well 6, and the lower end of the pumping well 6 is inserted into the water storage module one 22.

[0040] The grass-planting ditch 3 is laid from top to bottom in sequence as a covering layer 31, a planting layer 32, a sand layer 33, a gravel layer 34, and a compacted plain soil layer 14. A sand retaining net is laid on the upper surface of the covering layer 31 to reduce the lifting of sand and soil. A vertically arranged infiltration well 8 is arranged in the grass-planting ditch 3. The infiltration well 8 is also connected to the municipal pipe network. The upper end of the infiltration well 8 is higher than the surface of the covering layer 31 of the grass-planting ditch 3. An overflow port 81 is provided at the upper end, and a detachable sewage interception basket 82 is installed in the well opening below the overflow port 81. The infiltration well 8 is made of permeable concrete. There are two water outlets in the infiltration well 8. From top to bottom, they are an overflow pipe 83 connecting to the water storage module two and a municipal sewage pipe 84. An inlet for the overflow pipe 24 connecting to the water storage module one 22 is provided in the middle part between the above two water outlets. At the same time, a sand filtering net is added at the connection port of the overflow pipe 83 where the infiltration well 8 flows to the water storage module two. Figure 11As shown, the second water storage module 35 is arranged underground below the planting layer 32 of the grass planting ditch 3. Its structural layout is the same as that of the first water storage module 22. Similarly, the outside of the second water storage module 35 is protected by a permeable concrete protective layer 36. A permeable geotextile is arranged in the upper gap between the permeable concrete protective layer 36 and the second water storage module 35, and waterproof geotextiles are arranged in the side and bottom gaps between the two.

[0041] Embodiment 2,

[0042] Based on the technical solution described in the above Embodiment 1, combined with Figures 11 to 17 As shown, a plurality of plastic water retaining walls 9 are further arranged in the grass planting ditch 3. The plastic water retaining walls 9 are arranged on the downstream side (i.e., the downhill side) of the infiltration well 8. Their bottoms are buried in the sand layer 33 of the grass planting ditch 3 and are connected to the second water storage module 35 underground in the grass planting ditch 3. The second water storage module 35 can be provided with a number corresponding to the number of plastic water retaining walls 9 and are respectively located below the corresponding plastic water retaining walls 9. The plurality of second water storage modules 35 are connected to each other through an overflow pipe; the bottom of the above plastic water retaining wall 9 and the permeable concrete protective layer 36 above the second water storage module 35 are fixed by an adhesive to prevent its position from shifting easily. The plastic water retaining wall 9 is provided with a water inlet hole 91, a pumping hole 97 and an irrigation nozzle 92, and internally provided with a water collecting tank 93 and a connected pumping channel 94. The lower end of the pumping channel 94 is connected to the second water storage module 35; the water inlet hole 91 is arranged on the front side of the plastic water retaining wall 9, and a sand retaining net 98 is added at the outer end entrance. The inner end of the water inlet hole 91 communicates with the water collecting tank 93; the irrigation nozzle 92 is arranged on the upper part of the plastic water retaining wall 9, and its water inlet end is connected with a flexible water pipe 95. The flexible water pipe is arranged in the pumping channel 94; the pumping hole 97 is arranged on the back of the plastic water retaining wall 9 and is connected to the second water storage module 35 through a flexible pumping pipe 96. The flexible pumping pipe 96 is also arranged in the pumping channel 94. Preferably, the plastic water retaining wall 9 is made of PPS material, and the sand retaining net 98 configured for the water inlet hole 91 on the plastic water retaining wall 9 is made of nylon material.

[0043] Furthermore, in order to increase the stability of the plastic water retaining wall 9, a plurality of equally spaced inclined support bodies 99 are arranged on its back. The pumping hole 97 can be arranged on the inclined support body 99, and its opening direction is perpendicular to the plastic water retaining wall 9.

[0044] The specific application principle is as follows. During rainfall, the flow of rainwater is mainly divided into two parts: one is surface runoff, and the other is subsurface seepage. Rainwater is collected through surface runoff and subsurface seepage. First, the collected rainwater flows into the soil and is absorbed and utilized by the vegetation in the grassed swale 3. Secondly, it flows into the water storage module for storage. Finally, the excess rainwater is discharged through the municipal overflow pipe. Under the interception of the sand retention net, the rainwater can be preliminarily cleaned; the preliminarily treated rainwater in the water storage module two 35 can be pumped out from the pumping hole 97 on the back of the plastic water retaining wall 9 and utilized.

[0045] During rainfall, rainwater first enters the system through subsurface seepage. The rainwater seeping into the motor lane 1 flows towards the rainwater well 5 under the blocking effect of the impervious asphalt filling colloid 15; the rainwater seeping into the sidewalk 2 and the grassed swale 3 enters the corresponding water storage module through the permeable pavement. The initial rainwater flowing into the rainwater well 5 and the infiltration well 8 is discharged through the first flush from the municipal sewage pipe 84. As time goes by and the rainfall gradually increases, the flow mode of rainwater changes from subsurface seepage to surface runoff. The rainwater on the slope flows downward along it and passes through the water guiding speed reducer 4. Blocked by the water guiding speed reducer 4, it flows into the internal water guiding groove 43 from its water inlet 42, and then flows out from both ends of the water guiding speed reducer strip and enters the rainwater well 5; the grassed swale 3 is blocked by the plastic water retaining wall 9 to guide the rainwater into the infiltration well 8. The rainwater that has been preliminarily cleaned through the road surface structure flows into each water storage module for storage, and finally the stored rainwater in the corresponding water storage module is pumped out through the pumping well 6 on the sidewalk 2 or the pumping hole 97 on the back of the plastic water retaining wall 9 for use.

[0046] The sponge city slope rainwater collection and utilization system has remarkable effects. After the rainwater seeps into the interior of the motor lane 1, the different water permeability of the two parts of the road surface is used to guide the rainwater seeping into the road surface so that it flows into the pre-arranged rainwater well 5; and due to the flexibility of the impervious asphalt filling colloid 15, it can also produce an adaptive deformation maintenance effect on the road surface settlement generated during use. When rainwater runoff occurs on the road surface, the water guiding speed reducer 4 laid on the road surface plays a guiding role in the runoff rainwater, and it flows into the rainwater well 5 from both ends, so that as little rainwater runoff as possible flows into the flat area, reducing the harm of waterlogging and delaying the flood peak period of the flat area. The collected rainwater is stored through multiple water storage modules after flowing into the system, and the rainwater can be subsequently utilized through the pumping hole 97 set on the plastic water retaining wall 9 and the irrigation nozzle 92, reducing the waste of fresh water resources. Applying this system to the actual sponge city construction, using its orderly, environmentally friendly and efficient characteristics, realizing the systematic treatment of rainwater, improving the rainwater collection efficiency while also being purified, facilitating the subsequent utilization of the collected rainwater, meeting the corresponding strength requirements and being convenient for maintenance.

[0047] The related technical features not described in detail in the above technical solution are prior art and will not be elaborated here.

[0048] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention shall also fall within the protection scope of the present invention.

Claims

1. A rainwater collection and utilization system for a sponge city slope road, characterized in that: it includes a motor vehicle lane, a sidewalk, and a grassed swale arranged in sequence from the road center to both sides of the road, with the motor vehicle lane having a drainage and infiltration function; the motor vehicle lane from top to bottom is a permeable pavement layer, a stabilized crushed stone cushion layer, and a compacted plain soil layer. In the permeable pavement layer, impervious asphalt filling colloids perpendicular to the road surface are arranged at equal intervals. On the motor vehicle lane surface directly above the impervious asphalt filling colloids, there are water guiding deceleration strip bars. The two ends of the water guiding deceleration strip bars are spaced from the sidewalk. On the downward side of the two ends of the water guiding deceleration strip bars on the motor vehicle lane, there are rainwater wells extending longitudinally underground, and the rainwater wells are connected to the municipal pipe network; the sidewalk from top to bottom is a sidewalk permeable brick layer, a permeable concrete mattress layer, a stabilized crushed stone cushion layer, and a compacted plain soil layer. And a water storage module one is arranged in the compacted plain soil layer below the sidewalk. There is a pumping well extending longitudinally underground on the sidewalk, and the lower end of the pumping well is inserted into the water storage module one; the grassed swale from top to bottom is a covering layer, a planting layer, a sand layer, a gravel layer, and a compacted plain soil layer. In the grassed swale, there are infiltration wells arranged longitudinally, and the infiltration wells are connected to the municipal pipe network. The upper end of the infiltration well is higher than the surface of the covering layer of the grassed swale; the above-mentioned rainwater wells, pumping wells, water storage module one, and infiltration wells are interconnected through overflow pipes; a water storage module two is arranged underground below the planting layer of the grassed swale; the infiltration well of the grassed swale is made of permeable concrete. The infiltration well has two water outlets, which are, from top to bottom, an overflow pipe connecting to the water storage module two and a municipal sewage pipe in sequence. A sand filtering net is added at the water outlet of the overflow pipe of the infiltration well flowing to the water storage module two. A trash basket is detachably installed at the upper end overflow opening of the infiltration well; a plastic water retaining wall is also arranged in the grassed swale, and the bottom of the plastic water retaining wall is connected to the water storage module two below the grassed swale; the plastic water retaining wall is provided with a water inlet hole, a water collecting tank, a pumping hole, and an irrigation nozzle. Among them, the water inlet hole is arranged on the front side of the plastic water retaining wall, and a sand retaining net is added at the outer end inlet; the irrigation nozzle is arranged at the upper part of the plastic water retaining wall, and its water inlet end is connected to the water storage module two through a flexible water pipe; the pumping hole is arranged on the back of the plastic water retaining wall and is connected to the water storage module two through a flexible pumping pipe.

2. The rainwater collection and utilization system for a sponge city slope road according to claim 1, characterized in that: the water guiding deceleration strip bars are horizontally arranged on the motor vehicle lane, perpendicular to the sidewalk, and there are multiple of them, spaced from each other; multiple water guiding decelerations are connected in series in each water guiding deceleration strip bar. Each water guiding deceleration has multiple fixing holes, and expansion screws pass through the corresponding fixing holes to fix the water guiding deceleration on the motor vehicle lane; each water guiding deceleration internally has a water guiding groove running through its length direction. On the side of each water guiding deceleration facing the top of the slope, there is a water inlet, and the inner end of the water inlet is connected to the water guiding groove; the outer edges of the water guiding decelerations at both ends of each water guiding deceleration strip bar are in a semi-circular shape.

3. The rainwater collection and utilization system for a sponge city slope road according to claim 1, characterized in that: The rainwater well is made of concrete, and a rainwater grate is installed at the upper opening; three drain outlets are provided in the rainwater well, and an overflow pipe leading to the municipal pipeline, an overflow pipe leading to the first water storage module, and a municipal sewage pipe are connected in sequence from top to bottom.

4. A sponge city slope road rainwater collection and utilization system according to claim 1, characterized in that: The permeable pavement layer of the motor vehicle lane includes a permeable concrete surface layer and a permeable concrete mattress layer, and the permeable concrete surface layer covers the upper part of the permeable concrete mattress layer.

5. A sponge city slope road rainwater collection and utilization system according to claim 1, characterized in that: The first water storage module and the second water storage module have the same structural layout, and are both protected by a permeable concrete protective layer on the outside. A permeable geotextile is arranged in the upper gap between the permeable concrete protective layer and the water storage module, and a waterproof geotextile is arranged in the side gap and the bottom gap between the two.

6. A sponge city slope road rainwater collection and utilization system according to claim 1, characterized in that: The plastic water retaining wall is made of PPS material; the sand retaining net equipped for the water inlet hole on the plastic water retaining wall is made of nylon material.

7. A sponge city slope road rainwater collection and utilization system according to claim 1, characterized in that: A sand retaining net is externally attached to the covering layer of the grass planting ditch.

8. A sponge city slope road rainwater collection and utilization system according to claim 1, characterized in that: A plurality of inclined support bodies are provided on the back of the plastic water retaining wall, and the pumping holes can be arranged on the inclined support bodies, and their opening directions are perpendicular to the plastic water retaining wall.

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