Sponge city rainwater treatment system
By designing sunken green spaces and green roof structures, combined with rainwater harvesting ponds, the rainwater harvesting area is expanded, solving the problem of small harvesting area in existing sponge city rainwater treatment systems and achieving efficient rainwater collection and reuse.
Patent Information
- Application Number
- CN202520425978.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing sponge city rainwater treatment systems have small rainwater collection areas and can only collect a limited amount of rainwater.
A sponge city rainwater treatment system was designed, which includes a sunken green space structure, a green roof structure, and a rainwater collection pond. It utilizes components such as impermeable membranes, gravel drainage layers, permeable surface layers, overflow wells, and drainage pipes, combined with permeable pavement structures, to expand the rainwater collection area and improve rainwater collection capacity.
It improves rainwater harvesting capacity, enabling the extensive collection of rainwater, preventing rainwater infiltration, ensuring that the inlet holes are not blocked, and achieving effective collection and storage of rainwater to support plant irrigation and reuse.
Smart Images
Figure CN223951904U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rainwater treatment system technical field, especially to a kind of sponge city rainwater treatment system. BACKGROUND
[0002] Sponge city is a new generation of urban rainwater management concept, refers to the city in adapting to environmental change and responding to rainwater natural disasters, etc. With good "elasticity", also can be called "water elastic city", international general term is "low impact development rainwater system construction". Its main function is to absorb water, store water, infiltrate water, purify water when raining, and to "release" and utilize the stored water when needed.
[0003] The prior art sponge city rainwater treatment system has small rainwater collection area and limited rainwater collection.
[0004] Therefore, a sponge city rainwater treatment system is needed to solve the above technical problems. UTILITY MODEL CONTENT
[0005] The utility model provides a kind of sponge city rainwater treatment system, rainwater collection area is larger, can widely collect rainwater.
[0006] The technical scheme of the utility model is as follows:
[0007] A kind of sponge city rainwater treatment system, comprising:
[0008] Down concave green land structure, it includes foundation pit, anti-seepage membrane, water infiltration surface layer, gravel drainage layer, overflow well, rainwater grate and drain pipe;The foundation pit includes water storage pit and drainage pit, the drainage pit is arranged at the bottom of the water storage pit, and the slope of the two sides of the drainage pit is greater than the slope of the two sides of the water storage pit;The anti-seepage membrane is laid on the water storage pit and the drainage pit;The gravel drainage layer is filled in the drainage pit and is located above the anti-seepage membrane;The water infiltration surface layer is filled in the water storage pit and is located above the gravel drainage layer, and the water infiltration surface layer is concave at the drainage pit and forms a water storage pool, and the water infiltration surface layer is used for planting plants;The overflow well is arranged in the foundation pit and is located at the concave place of the water infiltration surface layer, and the top thereof protrudes from the water infiltration surface layer;The rainwater grate is arranged on the top of the overflow well, and the rainwater grate is used to make the rainwater in the water storage pool higher than the overflow well enter the overflow well;The drain pipe is arranged in the gravel drainage layer and is communicated with the overflow well, and a plurality of water inlets are arranged on the periphery of the drain pipe;
[0009] Green roof structure, for being arranged on roof and discharging roof rainwater;And,
[0010] Rainwater collection pool, connected to the overflow well and the green roof structure, for collecting rainwater.
[0011] The sponge city rainwater treatment system, wherein the top of the anti-seepage film is higher than the rainwater grate.
[0012] The sponge city rainwater treatment system, wherein the anti-seepage film extends to the position of 0.4m-0.6m outside the boundary of the water storage pool.
[0013] The sponge city rainwater treatment system, wherein the water-permeable surface layer comprises a cover layer and a planting soil layer, the planting soil layer is used for planting plants, and the cover layer is located above the planting soil layer.
[0014] The sponge city rainwater treatment system, wherein the concave green land structure further comprises a medium sand filtering layer and a water-permeable work cloth, the medium sand filtering layer is located below the water-permeable surface layer and above the gravel drainage layer, and the water-permeable work cloth is located below the medium sand filtering layer and above the gravel drainage layer.
[0015] The sponge city rainwater treatment system, wherein the slope of the two sides of the drainage pit is 1:1, and the slope of the two sides of the water storage pit is 1:3.
[0016] The sponge city rainwater treatment system, wherein the green roof structure comprises a roof planting soil, a filtering layer, a concave-convex drainage board, a waterproof layer, a first leveling layer, a heat preservation layer, a second leveling layer, a structural layer, a brick wall and a rainwater head; the structural layer is used for being arranged on a roof, the structural layer is provided with a containing groove; the waterproof layer, the first leveling layer, the heat preservation layer and the second leveling layer are filled in the bottom of the containing groove from top to bottom; the roof planting soil, the filtering layer and the concave-convex drainage board are stacked on the waterproof layer from top to bottom; the brick wall is arranged on one side of the roof planting soil, the filtering layer and the concave-convex drainage board, the brick wall is arranged in the side wall of the containing groove in a spaced mode, so as to form a drainage ditch; one side of the concave-convex drainage board close to the drainage ditch is provided with a water outlet which is communicated with the drainage ditch; the side wall of the containing groove is provided with an overflow port which is communicated with the drainage ditch, the overflow port is used for allowing rainwater outside the structural layer to enter the drainage ditch; the top surface of the roof planting soil, the side wall of the containing groove and the brick wall form a water storage pool; the rainwater head is arranged in the waterproof layer, the first leveling layer, the heat preservation layer, the second leveling layer and the structural layer, the inlet of the rainwater head extends upwards into the drainage ditch, the outlet of the rainwater head extends downwards to the outside of the structural layer and is communicated to the rainwater collection pool.
[0017] The sponge city rainwater treatment system, the rainwater collecting pool is used for being buried in the ground, the rainwater collecting pool includes a PP module combined pool, a waterproof wrapping layer, a medium sand protection layer, a reinforced concrete bottom plate, a plain concrete cushion layer and a sewage pump, the PP module combined pool is connected with the overflow well and the green roof structure, the PP module combined pool is provided with a water storage well, the waterproof wrapping layer is wrapped outside the PP module combined pool, the medium sand protection layer is arranged above and on the side of the PP module combined pool, the reinforced concrete bottom plate is arranged below the PP module combined pool, the plain concrete cushion layer is arranged below the reinforced concrete bottom plate, and the sewage pump is arranged at the bottom of the water storage well and is used for discharging sludge deposited in the water storage well.
[0018] The sponge city rainwater treatment system, the rainwater collecting pool is used for being buried in the ground, the rainwater collecting pool includes a PP module combined pool, a waterproof wrapping layer, a medium sand protection layer, a reinforced concrete bottom plate, a plain concrete cushion layer and a sewage pump, the PP module combined pool is connected with the overflow well and the green roof structure, the PP module combined pool is provided with a water storage well, the waterproof wrapping layer is wrapped outside the PP module combined pool, the medium sand protection layer is arranged above and on the side of the PP module combined pool, the reinforced concrete bottom plate is arranged below the PP module combined pool, the plain concrete cushion layer is arranged below the reinforced concrete bottom plate, and the sewage pump is arranged at the bottom of the water storage well and is used for discharging sludge deposited in the water storage well.
[0019] The sponge city rainwater treatment system, the rainwater collecting pool is used for being buried in the ground, the rainwater collecting pool includes a PP module combined pool, a waterproof wrapping layer, a medium sand protection layer, a reinforced concrete bottom plate, a plain concrete cushion layer and a sewage pump, the PP module combined pool is connected with the overflow well and the green roof structure, the PP module combined pool is provided with a water storage well, the waterproof wrapping layer is wrapped outside the PP module combined pool, the medium sand protection layer is arranged above and on the side of the PP module combined pool, the reinforced concrete bottom plate is arranged below the PP module combined pool, the plain concrete cushion layer is arranged below the reinforced concrete bottom plate, and the sewage pump is arranged at the bottom of the water storage well and is used for discharging sludge deposited in the water storage well.
[0020] The sponge city rainwater treatment system, the rainwater collecting pool is used for being buried in the ground, the rainwater collecting pool includes a PP module combined pool, a waterproof wrapping layer, a medium sand protection layer, a reinforced concrete bottom plate, a plain concrete cushion layer and a sewage pump, the PP module combined pool is connected with the overflow well and the green roof structure, the PP module combined pool is provided with a water storage well, the waterproof wrapping layer is wrapped outside the PP module combined pool, the medium sand protection layer is arranged above and on the side of the PP module combined pool, the reinforced concrete bottom plate is arranged below the PP module combined pool, the plain concrete cushion layer is arranged below the reinforced concrete bottom plate, and the sewage pump is arranged at the bottom of the water storage well and is used for discharging sludge deposited in the water storage well. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following briefly introduces the drawings needed to be used in the embodiments, and the drawings in the following description are only corresponding drawings of some embodiments of the present application.
[0022] Figure 1The utility model provides a three-dimensional section structure schematic drawing of the sunken green land structure of the sponge city rainwater treatment system.
[0023] Figure 2 The utility model provides a three-dimensional section structure schematic drawing of the green roof structure of the sponge city rainwater treatment system.
[0024] Figure 3 The utility model provides a three-dimensional section structure schematic drawing of the rainwater collecting pool of the sponge city rainwater treatment system.
[0025] Figure 4 The utility model provides a plane structure schematic drawing of the rainwater collecting pool and rainwater processor of the sponge city rainwater treatment system.
[0026] Figure 5 The utility model provides a three-dimensional section structure schematic drawing of the permeable pavement structure of the sponge city rainwater treatment system.
[0027] Among them,
[0028] 1, sunken green land structure,
[0029] 11, foundation pit, 111, water storage pit, 112, drainage pit, 113, water storage pool,
[0030] 12, impermeable membrane,
[0031] 13, water permeable surface layer, 131, cover layer, 132, planting soil layer,
[0032] 14, gravel drainage layer,
[0033] 15, overflow well,
[0034] 16, rainwater grate,
[0035] 17, drain pipe,
[0036] 18, medium sand filter layer,
[0037] 19, water permeable work cloth,
[0038] 2, green roof structure, 20, roof planting soil, 21, filter layer, 22, concave-convex drainage board, 221, water outlet, 23, waterproof layer, 24, first leveling layer, 25, heat preservation layer, 26, second leveling layer, 27, structure layer, 271, drainage ditch, 272, overflow port, 273, water storage pool, 28, brick wall, 29, rainwater bucket,
[0039] 3, rainwater collection tank, 31, PP module combination water tank, 311, water storage well, 32, waterproof wrapping layer, 33, medium sand protection layer, 34, reinforced concrete bottom plate, 35, plain concrete cushion layer, 36, sewage pump, 37, reuse pump,
[0040] 4, permeable pavement structure, 41, permeable tile, 42, medium sand leveling layer, 43, permeable concrete layer, 44, graded gravel layer,
[0041] 5, rainwater processor, 51, rainwater reuse pipe, 52, backwash pipeline.
[0042] In the drawings, similar elements are denoted by the same reference numerals. DETAILED DESCRIPTION
[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0044] The direction terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only the orientation of the drawings. The direction terms are used to explain and understand the present application, not to limit the present application.
[0045] The terms "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance, and are not limited as the order of precedence.
[0046] In the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0047] The rainwater treatment system of the sponge city in the prior art has a small rainwater collection area, and the amount of rainwater that can be collected is limited.
[0048] The following is a preferred embodiment of a sponge city rainwater treatment system provided by the present application which can solve the above technical problems.
[0049] Please refer to Figure 1 , Figure 2 and Figure 3 , the sponge city rainwater treatment system comprises a sunken green land structure 1, a green roof structure 2 and a rainwater collecting pool 3.
[0050] The sunken green land structure 1 comprises a foundation pit 11, an anti-seepage film 12, a water-permeable surface layer 13, a gravel drainage layer 14, an overflow well 15, a rainwater grate 16 and a drainage pipe 17. The foundation pit 11 comprises a water storage pit 111 and a drainage pit 112, the drainage pit 112 is arranged at the bottom of the water storage pit 111, and the slope of the two sides of the drainage pit 112 is greater than that of the water storage pit 111. The anti-seepage film 12 is laid on the water storage pit 111 and the drainage pit 112. The gravel drainage layer 14 is filled in the drainage pit 112 and is located above the anti-seepage film 12. The water-permeable surface layer 13 is filled in the water storage pit 111 and is located above the gravel drainage layer 14, the water-permeable surface layer 13 is sunken at the drainage pit 112 and forms a water storage pool 113, and the water-permeable surface layer 13 is used for planting plants. The overflow well 15 is arranged in the foundation pit 11 and is located at the sunken position of the water-permeable surface layer 13, and the top of the overflow well 15 protrudes from the water-permeable surface layer 13. The rainwater grate 16 is arranged at the top of the overflow well 15, and the rainwater grate 16 is used for allowing the rainwater in the water storage pool 113 that is higher than the overflow well 15 to flow into the overflow well 15. The drainage pipe 17 is arranged in the gravel drainage layer 14 and is in communication with the overflow well 15, and a plurality of water inlets are arranged on the side of the drainage pipe 17.
[0051] The green roof structure 2 is used for being arranged on a roof and discharging rainwater on the roof.
[0052] The rainwater collecting pool 3 is connected with the overflow well 15 and the green roof structure 2 and is used for collecting rainwater.
[0053] The sponge city rainwater treatment system of the utility model, the rainwater around the foundation pit 11 flows into the water storage pool 113, irrigates the plants planted in the water-permeable surface layer 13, and the excessive water permeates downward to the gravel drainage layer 14 of the drainage pit 112 and enters the drainage pipe 17 through the water inlets and is discharged. The structure of the gravel drainage layer 14 prevents the water inlets from being blocked. The slope of the two sides of the drainage pit 112 is relatively large, which is beneficial to the rainwater to flow to the drainage pipe 17; the slope of the two sides of the water storage pit 111 is small, which can expand the area of the water storage pit 111 and improve the rainwater collecting capacity; the foundation pit 11 is laid with the anti-seepage film 12, which can prevent the rainwater from permeating downward and is beneficial to the rainwater collection. The green roof structure 2 can collect and discharge the rainwater on the roof, and the rainwater collecting pool 3 can collect the rainwater of the sunken green land structure 1 and the green roof structure 2 at the same time, thereby improving the rainwater collecting capacity.
[0054] If the rainfall is large, the rainwater cannot be infiltrated in time, the water storage tank 113 can store a certain amount of rainwater, when the rainwater in the water storage tank 113 reaches a certain height, part of the rainwater will flow into the overflow well 15 through the rainwater grate 16, so as to timely drain away.
[0055] Please refer to Figure 1 , the top of the impermeable film 12 is higher than the rainwater grate 16, which can improve the rainwater collection capacity.
[0056] Please refer to Figure 1 , the impermeable film 12 extends to 0.4m-0.6m outside the boundary of the water storage tank 113, which can further improve the rainwater collection capacity, preferably 0.5m.
[0057] Please refer to Figure 1 , the water-permeable surface layer 13 includes a cover layer 131 and a planting soil layer 132, the planting soil layer 132 is used for planting plants, and the cover layer 131 is located above the planting soil layer 132. The cover layer 131 can effectively protect the planting soil layer 132 and prevent the planting soil layer 132 from being lost.
[0058] Please refer to Figure 1 , the sunken green structure 1 further includes a medium sand filtering layer 18 and a water-permeable work cloth 19; the medium sand filtering layer 18 is located below the water-permeable surface layer 13 and above the gravel drainage layer 14; the water-permeable work cloth 19 is located below the medium sand filtering layer 18 and above the gravel drainage layer 14. The medium sand filtering layer 18 and the water-permeable work cloth 19 can filter out impurities mixed in the rainwater, avoiding the water inlet hole being blocked.
[0059] Please refer to Figure 1 , the slope of the two sides of the drainage pit 112 is 1:1, and the slope of the two sides of the water storage pit 111 is 1:3. The slope of the two sides of the drainage pit 112 is 1:1, which utilizes the rainwater in the water storage pit 111 to flow into the drainage pit 112, and is also beneficial to the rainwater to converge at the drainage pipe 17. The slope of the two sides of the water storage pit 111 is 1:3, which utilizes the rainwater around the foundation pit 11 to flow into the water storage pit 111, and is also beneficial to expand the area of the water storage pit 111.
[0060] Please refer to Figure 2The green roof structure 2 comprises a roof planting soil 20, a filter layer 21, a concave-convex drainage plate 22, a waterproof layer 23, a first leveling layer 24, an insulation layer 25, a second leveling layer 26, a structural layer 27, a brick wall 28 and a rainwater collector 29. The structural layer 27 is arranged on the roof, and the structural layer 27 is provided with a receiving groove. The waterproof layer 23, the first leveling layer 24, the insulation layer 25 and the second leveling layer 26 are filled in the bottom of the receiving groove from top to bottom. The roof planting soil 20, the filter layer 21 and the concave-convex drainage plate 22 are stacked on the waterproof layer 23 from top to bottom. The brick wall 28 is arranged on one side of the roof planting soil 20, the filter layer 21 and the concave-convex drainage plate 22, and the brick wall 28 is arranged in the side wall of the receiving groove to form a drainage ditch 271. The concave-convex drainage plate 22 is provided with a drainage port 221 which is in communication with the drainage ditch 271. The side wall of the receiving groove is provided with an overflow port 272 which is in communication with the drainage ditch 271, and the overflow port 272 is used for allowing rainwater outside the structural layer 27 to enter the drainage ditch 271. The top surface of the roof planting soil 20, the side wall of the receiving groove and the brick wall 28 form a water storage pool 273. The rainwater collector 29 is arranged in the waterproof layer 23, the first leveling layer 24, the insulation layer 25, the second leveling layer 26 and the structural layer 27. The inlet of the rainwater collector 29 extends upwardly into the drainage ditch 271, the outlet of the rainwater collector 29 extends downwardly to the outside of the structural layer 27, and the outlet of the rainwater collector 29 is in communication with the rainwater collection pool 3.
[0061] When rainwater falls on the roof planting soil 20, the rainwater penetrates downwardly, flows into the concave-convex drainage plate 22 after being filtered by the filter layer 21, and is discharged into the drainage ditch 271 through the drainage port 221, and then is discharged into the rainwater collection pool 3 through the rainwater collector 29, so as to complete the collection of the rainwater. When the water level outside the structural layer 27 is high, the rainwater can be discharged into the drainage ditch 271 through the overflow port 272. When the rainfall is large and the rainwater cannot be penetrated in time, a certain amount of rainwater can be stored in the water storage pool 273 to provide water source for the plants planted in the roof planting soil 20. The waterproof layer 23 can prevent the rainwater reaching the concave-convex drainage plate 22 from penetrating downwardly, the insulation layer 25 can ensure the temperature of the building space below the roof, the first leveling layer 24 and the second leveling layer 26 can enable the concave-convex drainage plate 22 to be placed horizontally, and the structural layer 27 can prevent the rainwater from penetrating into the space below the roof.
[0062] Please refer to Figure 3, the rainwater collecting pool 3 is used for being buried underground, the rainwater collecting pool 3 includes a PP module combined pool 31, a waterproof wrapping layer 32, a medium sand protection layer 33, a reinforced concrete bottom plate 34, a plain concrete cushion layer 35 and a sewage pump 36. The PP module combined pool 31 is communicated with the overflow well 15 and the green roof structure 2, and the PP module combined pool 31 is provided with a water storage well 311. The waterproof wrapping layer 32 is wrapped outside the PP module combined pool 31. The medium sand protection layer 33 is arranged above and on the side of the PP module combined pool 31. The reinforced concrete bottom plate 34 is arranged below the PP module combined pool 31. The plain concrete cushion layer 35 is arranged below the reinforced concrete bottom plate 34. The sewage pump 36 is arranged at the bottom of the water storage well 311 and is used for discharging sludge deposited in the water storage well 311.
[0063] Rainwater of the overflow well 15 and the green roof structure 2 flows into the PP module combined pool 31, and then flows into the water storage well 311, and the sewage pump 36 introduces deposited sludge to a downstream rainwater well. The waterproof wrapping layer 32 can prevent rainwater of the PP module combined pool 31 from flowing out. The medium sand protection layer 33, the reinforced concrete bottom plate 34 and the plain concrete cushion layer 35 can all protect the PP module combined pool 31.
[0064] Please refer to Figure 3 and Figure 4 , the sponge city rainwater treatment system further includes a rainwater processor 5, an output end of the rainwater processor 5 is provided with a rainwater recycling pipe 51 and a backwashing pipe 52, the backwashing pipe 52 is communicated to the PP module combined pool 31. The rainwater collecting pool 3 further includes a recycling pump 37, the recycling pump 37 is arranged in the water storage well 311 and is higher than the sewage pump 36, and the recycling pump 37 is connected to the rainwater processor 5. The recycling pump 37 is higher than the sewage pump 36, so that the recycling pump 37 can introduce clean water above to the rainwater processor 5, for rainwater recycling, and the PP module combined pool 31 can be washed.
[0065] Please refer to Figure 5 , the sponge city rainwater treatment system further includes a permeable pavement structure 4, the permeable pavement structure 4 is used for being arranged on plain soil of a road surface, and the permeable pavement structure 4 sequentially includes permeable floor tiles 41, a medium sand leveling layer 42, a permeable concrete layer 43 and a graded gravel layer 44 from top to bottom. Rainwater of the road surface can be sequentially penetrated to the permeable floor tiles 41, the medium sand leveling layer 42, the permeable concrete layer 43 and the graded gravel layer 44, and the greater the rainfall is, the deeper the penetration depth is, so that the road surface waterlogging can be effectively reduced.
[0066] The working principle of the sponge city rainwater treatment system of the preferred embodiment of the utility model:
[0067] At the sunken green structure 1, rainwater around the foundation pit 11 flows into the water storage pit 113, irrigates the plants planted in the water-permeable surface layer 13, and the excess water seeps into the gravel drainage layer 14 of the drainage pit 112, enters the drainage pipe 17 through the water inlet hole. During the seepage process, the medium sand filter layer 18 and the water-permeable cloth 19 are passed through to filter out impurities mixed in the rainwater. The structure of the gravel drainage layer 14 prevents the water inlet hole from being blocked. The slope of the two sides of the drainage pit 112 is relatively large, which is beneficial to the collection of rainwater at the drainage pipe 17. The slope of the two sides of the water storage pit 111 is small, which can expand the area of the water storage pit 111 and improve the rainwater collection capacity. The foundation pit 11 is laid with the impermeable membrane 12, which can prevent rainwater from seeping and is beneficial to rainwater collection. The cover layer 131 is located above the planting soil layer 132. The cover layer 131 can effectively protect the planting soil layer 132 and prevent the loss of the planting soil layer 132. If the rainfall is large, the rainwater cannot be seeped in time, and the water storage pit 113 can store a certain amount of rainwater. When the rainwater in the water storage pit 113 reaches a certain height, part of the rainwater will flow into the overflow well 15 through the rainwater grate 16, so as to be discharged in time.
[0068] At the green roof structure 2, rainwater falls on the roof planting soil 20 and seeps downward, flows into the concave-convex drainage plate 22 after being filtered by the filter layer 21, and is discharged into the drainage ditch 271 through the water outlet 221, and then is discharged into the PP module combined water pool 31 through the rainwater bucket 29. When the water level outside the structural layer 27 is high, it can be discharged into the drainage ditch 271 through the overflow port 272. When the rainfall is large and cannot be seeped in time, a certain amount of rainwater can be stored through the water storage pool 273 to provide water for the plants planted in the roof planting soil 20. The waterproof layer 23 can prevent the rainwater reaching the concave-convex drainage plate 22 from continuing to seep downward, the heat preservation layer 25 can ensure the temperature of the building space below the roof, the first leveling layer 24 and the second leveling layer 26 enable the concave-convex drainage plate 22 to be placed horizontally, and the structural layer 27 can prevent rainwater from seeping into the space below the roof.
[0069] The rainwater of the overflow well 15 and the rainwater discharged from the rainwater bucket 29 is collected into the PP module combined water pool 31, is transported into the water storage well 311 after being filtered, the sludge below the water storage well 311 is introduced into the downstream rainwater well by the sewage pump 36, the clean water above the water storage well 311 is introduced into the rainwater processor 5 by the reuse pump 37, rainwater is reused, and the PP module combined water pool 31 can be washed.
[0070] The rainwater of the road surface can seep downward into the water-permeable pavement brick 41, the medium sand leveling layer 42, the water-permeable concrete layer 43, and the graded gravel layer 44 in sequence. The greater the rainfall, the deeper the seepage depth, which can effectively reduce the water accumulation on the road surface.
[0071] Thus, the working principle of the sponge city rainwater treatment system of the preferred embodiment is achieved.
[0072] The sponge city rainwater treatment system, rainwater around the foundation pit flows into the water storage pool, plants planted in the water-permeable surface layer are irrigated, and the excessive water permeates to the gravel drainage layer of the drainage pit downward, enters the drainage pipe through the water inlet hole and is drained away. The structure of the gravel drainage layer prevents the water inlet hole from being blocked. The slope of the two sides of the drainage pit is relatively large, which is beneficial to the rainwater collection at the drainage pipe; the slope of the two sides of the water storage pit is small, the area of the water storage pit can be expanded, and the rainwater collection capacity is improved; the foundation pit is laid with an anti-seepage film, which can prevent rainwater from infiltrating and is beneficial to rainwater collection. The green roof structure can collect and discharge the rainwater on the roof, the rainwater collection pool can simultaneously collect the rainwater of the sunken green land structure and the green roof structure, and the rainwater collection capacity is improved.
[0073] To sum up, although the utility model has disclosed above with preferred embodiments, the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the conception of the technical scheme of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A sponge city rainwater treatment system, characterized in that, The application relates to a sunken green land structure, a green roof structure and a rainwater collecting pool. The sunken green land structure comprises a foundation pit, an anti-seepage film, a water-permeable surface layer, a gravel drainage layer, an overflow well, a rainwater grate and a drain pipe; the foundation pit comprises a water storage pit and a drainage pit, the drainage pit is arranged at the bottom of the water storage pit, and the slope of the two sides of the drainage pit is greater than that of the water storage pit; the anti-seepage film is laid on the water storage pit and the drainage pit; the gravel drainage layer is filled in the drainage pit and above the anti-seepage film; the water-permeable surface layer is filled in the water storage pit and above the gravel drainage layer, the water-permeable surface layer is sunken at the drainage pit and forms a water storage pool, and the water-permeable surface layer is used for planting plants; the overflow well is arranged in the foundation pit and at the sunken position of the water-permeable surface layer, and the top of the overflow well protrudes from the water-permeable surface layer; the rainwater grate is arranged at the top of the overflow well, and the rainwater grate is used for storing rainwater in the water storage pool which is higher than the overflow well into the overflow well; the drain pipe is arranged in the gravel drainage layer and communicates with the overflow well, and a plurality of water inlets are arranged on the periphery of the drain pipe. The green roof structure is arranged on a roof and is used for draining rainwater on the roof. The rainwater collecting pool is connected with the overflow well and the green roof structure and is used for collecting rainwater. 2.The sponge city rainwater treatment system according to claim 1, characterized in that, The top of the anti-seepage film is higher than the rainwater grate.
3. The sponge city rainwater treatment system according to claim 2, characterized in that, The anti-seepage film extends to 0.4 m-0.6 m outside the boundary of the water storage pool. 4.The sponge city rainwater treatment system according to claim 1, characterized in that, The water-permeable surface layer comprises a covering layer and a planting soil layer, the planting soil layer is used for planting plants, and the covering layer is arranged above the planting soil layer. 5.The sponge city rainwater treatment system according to claim 1, characterized in that, The sunken green land structure further comprises a medium sand filter layer and a water-permeable work cloth; the medium sand filter layer is arranged below the water-permeable surface layer and above the gravel drainage layer; and the water-permeable work cloth is arranged below the medium sand filter layer and above the gravel drainage layer. 6.The sponge city rainwater treatment system according to claim 1, characterized in that, The slope of the two sides of the drainage pit is 1:1, and the slope of the two sides of the water storage pit is 1:
3. 7.The sponge city rainwater treatment system according to claim 1, characterized in that, The green roof structure comprises a roof planting soil, a filter layer, a concave-convex drainage plate, a waterproof layer, a first leveling layer, an insulation layer, a second leveling layer, a structural layer, a brick wall and a rainwater collector; the structural layer is arranged on the roof, and the structural layer is provided with a containing groove; the waterproof layer, the first leveling layer, the insulation layer and the second leveling layer are filled in the bottom of the containing groove from top to bottom; the roof planting soil, the filter layer and the concave-convex drainage plate are stacked on the waterproof layer from top to bottom; the brick wall is arranged on one side of the roof planting soil, the filter layer and the concave-convex drainage plate, and the brick wall is arranged in the side wall of the containing groove to form a drainage ditch; the concave-convex drainage plate is provided with a water outlet communicated with the drainage ditch on the side close to the drainage ditch; the side wall of the containing groove is provided with an overflow port communicated with the drainage ditch, and the overflow port is used for allowing rainwater outside the structural layer to enter the drainage ditch; the top surface of the roof planting soil, the side wall of the containing groove and the brick wall form a water storage pool; the rainwater collector penetrates the waterproof layer, the first leveling layer, the insulation layer, the second leveling layer and the structural layer, the inlet of the rainwater collector extends upward into the drainage ditch, the outlet of the rainwater collector extends downward to the outside of the structural layer and is communicated to the rainwater collection pool. 8.The sponge city rainwater treatment system according to claim 1, characterized in that, The rainwater collection pool is used to be buried underground, and the rainwater collection pool comprises a PP module combined pool, a waterproof wrapping layer, a medium sand protection layer, a reinforced concrete bottom plate, a plain concrete cushion layer and a sewage pump; the PP module combined pool is communicated with the overflow well and the green roof structure, and the PP module combined pool is provided with a water storage well; the waterproof wrapping layer is wrapped outside the PP module combined pool; the medium sand protection layer is arranged above and on the side of the PP module combined pool; the reinforced concrete bottom plate is arranged below the PP module combined pool; the plain concrete cushion layer is arranged below the reinforced concrete bottom plate; and the sewage pump is arranged at the bottom of the water storage well and is used to discharge sludge deposited in the water storage well.
9. The sponge city rainwater treatment system according to claim 8, characterized in that, The rainwater treatment system of the sponge city further comprises a rainwater processor, an output end of the rainwater processor is provided with a rainwater recycling pipe and a backwashing pipeline, and the backwashing pipeline is communicated to the PP module combined pool; the rainwater collection pool further comprises a recycling pump arranged in the water storage well and higher than the sewage pump, and the recycling pump is connected to the rainwater processor. 10.The sponge city rainwater treatment system according to claim 1, characterized in that, The rainwater treatment system of the sponge city further comprises a permeable pavement structure arranged on the plain soil of the road surface, and the permeable pavement structure comprises, from top to bottom, a permeable tile, a medium sand leveling layer, a permeable concrete layer and a graded gravel layer.