CN210439438U - Rainwater bioretention device for multi-rainwater city - Google Patents
Rainwater bioretention device for multi-rainwater city Download PDFInfo
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- CN210439438U CN210439438U CN201920632349.5U CN201920632349U CN210439438U CN 210439438 U CN210439438 U CN 210439438U CN 201920632349 U CN201920632349 U CN 201920632349U CN 210439438 U CN210439438 U CN 210439438U
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Abstract
The utility model discloses a biological device that is detained of rainwater for many rainwater cities belongs to rainwater purification technical field. The device comprises a water filtering area and a water circulating area, wherein the water circulating area is arranged underground; the water filtering area is sequentially provided with a water storage layer, a bark covering layer, a vegetation and planting soil layer, an artificial packing layer, a gravel layer and a drainage pipe layer from top to bottom; the drainage pipe layer is uniformly provided with water permeable holes and is communicated with the overflow well; the top end of the overflow well is lower than the water collecting surface of the reservoir, a rainwater pipeline is arranged between the bottom end of the overflow well and the bottom of the reservoir, and the water storage layer is communicated with an inlet of an overground water suction pump. The utility model provides a raining concentrate, the biological detention device that leads to when rainfall is big structural stability poor, hold back not thorough, the plant survival rate is low and later stage facility maintenance cost too high problem.
Description
Technical Field
The utility model belongs to the technical field of the rainwater purifies, concretely relates to biological device that is detained of rainwater for many rainwater cities.
Background
The bioretention facility integrates the technologies of seepage, stagnation, purification and the like, and is used as an ecological rainwater utilization facility for greening communities, urban roads, parking lots, urban green lands, squares and the like. The bioretention pond mainly depends on assimilation and absorption of plants, restoration of microorganisms in soil, physical filtration, adsorption and ion exchange of fillers, solid precipitation of gravel layers and the like to purify pollutants in runoff rainwater. But in practical application, the problems of poor structural stability, incomplete rainwater interception, low plant survival rate and overhigh later-period facility maintenance cost of the bioretention facility are often caused by concentrated rainwater and large rainfall of part of cities.
Disclosure of Invention
The purpose of the invention is as follows: the utility model discloses to the not enough that exists among the prior art, provide a biological device that is detained of rainwater for many rainwater cities, solve among the prior art because the rainfall is concentrated, the biological detention facility structural stability that the big scheduling problem of rainfall leads to is poor, hold back not thorough, the plant survival rate is low and later stage facility maintenance cost too high problem.
The technical scheme is as follows: in order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
a rainwater bioretention device for a multi-rainwater city comprises a water filtering area and a water circulation area, wherein the water circulation area is arranged underground; the water filtering area comprises a water storage layer, a bark covering layer, a vegetation and planting soil layer, an artificial packing layer, a gravel layer, a drainage pipe layer and an overflow well, the water circulation area comprises a reservoir, and the reservoir is provided with an overground water pump inlet; wherein the water filtering area is sequentially provided with a water storage layer, a bark covering layer, a vegetation and planting soil layer, an artificial packing layer, a gravel layer and a drainage pipe layer from top to bottom; the drainage pipe layer is uniformly provided with water permeable holes and is communicated with the overflow well; the well mouth of overflow well is less than the catchment face of cistern, is equipped with rainwater pipeline between the bottom of overflow well and the bottom of cistern, and the aquifer communicates with above-ground suction pump entry.
The rainwater bioretention device for the multi-rainwater city is characterized in that vetiver grass is planted in vegetation and planting soil layers, and the vetiver grass has the advantages of strong root system selection, drought resistance, waterlogging resistance, cold and heat resistance, acid and alkali resistance and obvious nitrogen and phosphorus removal effect.
The rainwater bioretention device for the multi-rainwater city comprises a water storage layer, a bark covering layer, a vegetation and planting soil layer, an artificial packing layer and a sandstone layer, wherein the height ratio of the water storage layer to the bark covering layer to the vegetation and planting soil layer to the artificial packing layer to the sandstone layer is (6-7) to (1-2) to (5-20) to (2-3) to (4-6).
The rainwater bioretention device for the multi-rainwater city has the pipe diameter of the drainage pipe layer of 100-150mm, and the aperture of the water permeable hole is smaller than the particle size of the sandstone layer.
The top end of the overflow well is 100-150mm lower than the water collecting surface of the water storage tank.
A biological device that is detained of rainwater for many rainwater cities, the well head of overflow well is equipped with the well lid of adjustable opening size.
A suction pump is arranged between an inlet of the overground suction pump and the water storage layer.
Has the advantages that: compared with the prior art, the utility model has the advantages that:
(1) the utility model discloses a water filtering area is connected this circulation system with the hydrologic cycle district, concentrates at the rainfall, discharges unnecessary rainwater into the cistern when rainfall is big and store, prevents that the water storage layer is too high or spill over, highly maintains the best scope at vegetation growth with the water storage layer, has improved the effect of holding back of rainwater, has increased the vegetation life-span of surviving, reduces later stage facility maintenance cost.
(2) The utility model discloses well vegetation and planting soil layer are strong through planting the root system, and drought resisting, waterlogging tolerant, anti cold and hot, the vetiver grass of acid and alkali resistance and setting up multilayer filtration have improved the effect of getting rid of COD, TN, TP, N, P in the rainwater.
Drawings
Fig. 1 is a schematic structural view of the biological retention device of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to specific embodiments.
Example 1
A rainwater bioretention device for a multi-rainwater city, as shown in figure 1. The device comprises a water filtering area and a water circulating area, wherein the water circulating area is arranged underground; the water filtering area comprises a water storage layer 1, a bark covering layer 2, a vegetation and planting soil layer 3, an artificial packing layer 4, a gravel layer 5, a drainage pipe layer 6 and an overflow well 7, the water circulating area comprises a reservoir 8, and the reservoir 8 is provided with an overground water pump inlet 10; wherein the water filtering area is sequentially provided with a water storage layer 1, a bark covering layer 2, a vegetation and planting soil layer 3, an artificial packing layer 4, a gravel layer 5 and a drainage pipe layer 6 from top to bottom; water permeable holes are uniformly formed in the drain pipe layer 6, and the drain pipe layer 6 is communicated with an overflow well 7; the well mouth of the overflow well 7 is lower than the water collecting surface of the reservoir 8, a rainwater pipeline 9 is arranged between the bottom end of the overflow well 7 and the bottom of the reservoir 8, and the water storage layer 8 is communicated with an inlet 10 of the above-ground water suction pump.
Vetiver grass is planted in the vegetation and planting soil layer 3, the pipe diameter of the drainage pipe layer 6 is 100mm, the diameter of a water permeable hole of the drainage pipe layer is smaller than the particle size of gravel, a well cover with the size of an adjustable opening is additionally arranged at the well mouth of the overflow well 8, a rainwater pipeline 9 is arranged at the bottom end of the overflow well and is connected with the reservoir 8, when rainfall is concentrated and the rainfall is large, rainwater is discharged into the reservoir 8 through the overflow well 7 in order to prevent the water level of the water storage layer 1 from being overhigh or overflowing, the reservoir 8 is located underground and is connected with the water storage layer 1; the biological detention device is made of reinforced concrete.
Working principle; the flowing state of rainwater in the biological retention device is as follows: rainwater flows from top to bottom through the water storage layer 1, the bark covering layer 2, the vegetation and planting soil layer 3, the artificial packing layer 4, the gravel layer 5 and the drainage pipe layer 6 and is discharged into rivers and lakes. When the rainfall is concentrated and the rainfall is large, the opening size of the well cover of the overflow well 7 is adjusted, part of the rainwater is discharged into the reservoir 8 through the overflow well 7, and the liquid level of the water storage layer 1 is maintained; when the rainfall is less or the liquid level of the water storage layer 1 is too low, the rainwater in the water storage tank 8 can be pumped into the water storage layer 1 of the bioretention device through the water suction pump, and the liquid level of the water storage layer 1 is maintained in the range where vegetation is suitable to grow.
Adjust urban rainwater through using above device, vegetation and the vetiver grass survival rate in planting soil layer 3 are more than 90% in the device to COD, TN, TP, N, P's removal effect in the rainwater compares prior art and improves 65%.
Example 2
A rainwater bioretention device for a multi-rainwater city, as shown in figure 1. The device comprises a water filtering area and a water circulating area, wherein the water circulating area is arranged underground; the water filtering area comprises a water storage layer 1, a bark covering layer 2, a vegetation and planting soil layer 3, an artificial packing layer 4, a gravel layer 5, a drainage pipe layer 6 and an overflow well 7, the water circulating area comprises a reservoir 8, and the reservoir 8 is provided with an overground water pump inlet 10; wherein the water filtering area is sequentially provided with a water storage layer 1, a bark covering layer 2, a vegetation and planting soil layer 3, an artificial packing layer 4, a gravel layer 5 and a drainage pipe layer 6 from top to bottom; water permeable holes are uniformly formed in the drain pipe layer 6, and the drain pipe layer 6 is communicated with an overflow well 7; the well mouth of the overflow well 7 is lower than the water collecting surface of the reservoir 8, a rainwater pipeline 9 is arranged between the bottom end of the overflow well 7 and the bottom of the reservoir 8, and the water storage layer 8 is communicated with an inlet 10 of the above-ground water suction pump.
The height of a water storage layer 1 is set to be 300mm, the height of a bark covering layer 2 is set to be 80mm, the height of a vegetation and planting soil layer 3 is set to be 800mm, the vegetation has strong root system selection, is drought-resistant, waterlogging-resistant, cold-heat-resistant and acid-alkali-resistant, and is vetiver grass with obvious removal effect on nitrogen and phosphorus, the height of an artificial packing layer 4 is set to be 120mm, the artificial packing layer 4 consists of fly ash and sand in the volume ratio of 1: 5, a sandstone layer 5 is set to be 250mm, a drain pipe layer 6 has the pipe diameter of 100mm, the diameter of a water permeable hole is smaller than the diameter of the sandstone, the height of an overflow well 8 is 100mm lower than the water converging surface of the water storage layer 1, a well cover with the size capable of adjusting the opening is additionally arranged at the well mouth of the overflow well 8, the bottom of the overflow well is provided with a rainwater pipeline 9, the reservoir 8 is positioned underground and is connected with the water storage layer 1 through a water pump; the biological detention device is made of reinforced concrete.
Working principle; the flowing state of rainwater in the biological retention device is as follows: rainwater passes through the water storage layer 1, the bark covering layer 2, the vegetation and planting soil layer 3, the artificial packing layer 4, the gravel layer 5 and the drainage pipe layer 6 from top to bottom. When the rainfall is concentrated and the rainfall is large, the opening size of the well cover of the overflow well 7 is adjusted, part of the rainwater is discharged into the reservoir 8 through the overflow well 7, and the liquid level of the water storage layer 1 is maintained; when the rainfall is less or the water level of the water storage layer 1 is too low, the rainwater in the water storage tank 8 can be pumped into the water storage layer 1 of the bioretention device through the water suction pump, and the water level of the water storage layer 1 is maintained in the range suitable for vegetation growth.
Carry out further optimization to the device on embodiment 1's basis, adjust urban rainwater through using above device, vegetation and the vetiver grass survival rate of planting in the soil layer 3 have also certain improvement in the device, reach more than 95% to COD in the rainwater, TN, TP, N, P get rid of the effect and compare prior art and improve 69%, discover through practice, the utility model discloses the result of use is more stable, and the cost saving is up to 30%.
The above description is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit or essential characteristics of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (2)
1. A rainwater bioretention device for a multi-rainwater city is characterized by comprising a water filtering area and a water circulation area, wherein the water circulation area is arranged underground; the water filtering area comprises a water storage layer (1), a bark covering layer (2), a vegetation and planting soil layer (3), an artificial packing layer (4), a gravel layer (5), a drainage pipe layer (6) and an overflow well (7), the water circulating area comprises a reservoir (8), and the reservoir (8) is provided with an overground water pump inlet (10); wherein the water filtering area is sequentially provided with a water storage layer (1), a bark covering layer (2), a vegetation and planting soil layer (3), an artificial packing layer (4), a gravel layer (5) and a drainage pipe layer (6) from top to bottom; the drainage pipe layer (6) is uniformly provided with water permeable holes, and the drainage pipe layer (6) is communicated with the overflow well (7); the well mouth of the overflow well (7) is lower than the water collecting surface of the reservoir (8), a rainwater pipeline (9) is arranged between the overflow well (7) and the reservoir (8), and the water storage layer (1) is communicated with the inlet (10) of the underground water pumping pump; vetiver grass is planted in the vegetation and planting soil layer (3); the height ratio of the water storage layer (1), the bark covering layer (2), the vegetation and planting soil layer (3), the artificial packing layer (4) and the gravel layer (5) is (6-7): (1-2): (5-20): (2-3): (4-6); a well cover is arranged at the well mouth of the overflow well (7); a water pump is arranged between the inlet (10) of the above-ground water pump and the water storage layer (1); the well mouth of the overflow well (7) is 100mm and 150mm lower than the water collecting surface of the reservoir.
2. A stormwater bioretention device for use in multi-stormwater cities as claimed in claim 1, wherein the pipe diameter of the drainage pipe layer (6) is 100-150mm and the diameter of the water-permeable holes is smaller than the particle size of the gravel layer (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920632349.5U CN210439438U (en) | 2019-05-05 | 2019-05-05 | Rainwater bioretention device for multi-rainwater city |
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| CN201920632349.5U CN210439438U (en) | 2019-05-05 | 2019-05-05 | Rainwater bioretention device for multi-rainwater city |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081213A (en) * | 2020-08-25 | 2020-12-15 | 华恒建设集团有限公司 | Road water storage circulation structure suitable for sponge city |
| CN112127419A (en) * | 2020-09-12 | 2020-12-25 | 上海亦构创意设计有限公司 | Landscape rainwater is collected and water recycling system |
| CN113044991A (en) * | 2021-04-07 | 2021-06-29 | 上海市城市建设设计研究总院（集团）有限公司 | Suction type bioretention facility utilizing solar energy and wind energy |
| CN113445382A (en) * | 2021-07-28 | 2021-09-28 | 广州园林建筑规划设计研究总院有限公司 | High ground water level area early sponge type road auxiliary system and road |
-
2019
- 2019-05-05 CN CN201920632349.5U patent/CN210439438U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081213A (en) * | 2020-08-25 | 2020-12-15 | 华恒建设集团有限公司 | Road water storage circulation structure suitable for sponge city |
| CN112127419A (en) * | 2020-09-12 | 2020-12-25 | 上海亦构创意设计有限公司 | Landscape rainwater is collected and water recycling system |
| CN113044991A (en) * | 2021-04-07 | 2021-06-29 | 上海市城市建设设计研究总院（集团）有限公司 | Suction type bioretention facility utilizing solar energy and wind energy |
| CN113445382A (en) * | 2021-07-28 | 2021-09-28 | 广州园林建筑规划设计研究总院有限公司 | High ground water level area early sponge type road auxiliary system and road |
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Address after: Building 20, No.2, Lingxian Road, Qixia District, Nanjing City, Jiangsu Province Patentee after: NANJING ZHONGKE WATER ENVIRONMENT ENGINEERING Co.,Ltd. Address before: Building 20, block B, Rand Geographic Information Industrial Park, 18 Lingshan North Road, Qixia District, Nanjing City, Jiangsu Province, 210046 Patentee before: NANJING ZHONGKE WATER ENVIRONMENT ENGINEERING Co.,Ltd. |