CN108104247B - Mixed flow non-concave biological detention pool with initial rainwater discarding function - Google Patents
Mixed flow non-concave biological detention pool with initial rainwater discarding function Download PDFInfo
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- CN108104247B CN108104247B CN201711216666.0A CN201711216666A CN108104247B CN 108104247 B CN108104247 B CN 108104247B CN 201711216666 A CN201711216666 A CN 201711216666A CN 108104247 B CN108104247 B CN 108104247B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0403—Gullies for use in roads or pavements with a sediment trap
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/10—Dividing the first rain flush out of the stormwater flow
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Abstract
The invention discloses a mixed flow non-concave biological detention pool with an initial rainwater discarding function, which is provided with a bottom and a side wall and comprises three parts, namely an initial rainwater discarding and distributing well (10), a detention pool main body (20) and an overflow and outflow water collecting well (30). The effective flow discarding and separation of initial rainwater can be realized, and the runoff pollution is effectively controlled; the device has no concave requirement, can effectively reduce the particle pollutants in the runoff entering the facility, obviously reduce the possibility of blockage of the biological retention tank and ensure the long-term and high-efficiency operation of the facility; through the mixed flow mode of 'upstream + downstream', the increased runoff path in the facility can obviously improve the control effect of the facility on runoff pollution.
Description
Technical Field
The invention belongs to the field of urban drainage and sponge urban construction, and particularly relates to a mixed flow non-concave biological detention pond with an initial rainwater discarding function.
Background
Sponge city construction is an important measure for dealing with a series of urban environmental problems such as urban waterlogging, water body black and odorous, water ecological destruction and the like. As a typical facility in the source runoff control facility of sponge city construction, a rainwater bioretention facility (also called a rainwater garden) has multiple functions of reducing the total runoff amount at the source, delaying the peak discharge of runoff, controlling runoff pollution and the like, and is widely applied to the sponge city construction.
The runoff control of traditional biological detention facility is through the sunken 200~300mm formation water-storage layer in facility surface, realizes that the runoff stagnates and holds, surpasss this part and stagnates the rainwater overflow discharge that holds the ability, stagnates partial rainwater and realizes purifying the back through infiltration supplementary groundwater or through bottom perforation drain pipe and collect or discharge in 12~24 h. The runoff pollution control function is realized by the combined action of various fillers filled in the facility, plants and microorganisms.
The conventional bioretention facilities have the following problems due to their structural and design characteristics. (1) The facility does not have an initial rainwater discarding function, the initial rainwater pollution control is mainly realized through a facility percolation process, and a large amount of pollutants are enriched in the surface soil or fillers of the facility after running for a period of time under normal conditions, so that the fillers need to be replaced regularly; (2) the road surface runoff has more granular pollutants, and granular pollutants with different grain diameters, especially large granular pollutants are easy to accumulate on the surface layer of a facility, so that the permeability of the facility is reduced, and the rainwater control performance of the facility is seriously influenced; (3) when the catchment area of the facility is a road with heavy pollution or poor maintenance, such as a parking lot and a road with insufficient cleaning work, a great amount of pavement garbage, street dust and the like are flushed into the bioretention facility along with the runoff of rainwater, so that the daily operation and maintenance workload and difficulty of the facility are increased; (4) for some biological retention facilities constructed in building districts and public building areas, the subsidence of the green land can cause certain potential risks to the daily life of surrounding residents.
More than synthesizing, need overcome above-mentioned difficulty and problem through improving biological detention facility structure and operation mode to realize cutting down the runoff total amount, control runoff pollution at the source high efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of providing a mixed flow non-concave biological detention pool with an initial rainwater discarding function, wherein the detention pool has the functions of initial rainwater discarding, no concave requirement and mixed flow, the rainwater overflowing path can be obviously improved, and the pollutant removing effect is obviously enhanced.
In order to solve the above technical problems, the present invention adopts the technical scheme that a mixed flow non-concave biological retention pond with an initial rainwater discarding function is provided, the retention pond is provided with a bottom and a side wall and comprises an initial rainwater discarding and distributing well 10, a retention pond main body 20 and an overflow and outflow collecting well 30, the initial rainwater discarding and distributing well 10 and the retention pond main body 20 and the overflow and outflow collecting well 30 are roughly divided into relatively independent areas by partition plates 40 and 50, a connecting hole 41 and a connecting hole 51 are respectively arranged below the partition plates 40 and 50 to connect the two adjacent areas, the initial rainwater discarding and distributing well 10 comprises an initial rainwater storage area 11 and a water distributing area 12 which are separated by a baffle plate 13, the water distributing area 12 is adjacent to the retention pond main body through the partition plate 40, the top of the water distributing area 12 is provided with a cover plate 14 for preventing rainwater from directly flowing in, the detention pool main body 20 is divided into a gravel layer 21 and a packing layer 22 from bottom to top, a main body baffle 23 extending from the bottom to the inside of the packing layer 22 is arranged in the main body, and a water outlet 31 communicated with a rainwater pipeline is arranged below the overflow and outflow water collecting well 30.
Furthermore, the bottom of the detention pool is a concrete bottom surface, and the side wall is a cement mortar brick wall plastered by cement mortar, concrete or polyvinyl chloride integrated forming material.
Further, the top of the initial rainwater storage area 11 is provided with a rainwater grate for preventing sundries from flowing in, and the rainwater grate is made of cast iron or concrete.
Further, there is a vegetation layer above the filler layer 22.
Furthermore, the gravel layer 21 of the retention pool main body is respectively provided with a plurality of water distribution pipes 24 with closed ends, a plurality of water collecting pipes 25 are connected with the communication holes of the partition plates 40 and 50, and a plurality of water outlet holes are distributed on the side walls of the water distribution pipes 24 and the water collecting pipes 25.
Further, the cover plate 14 is made of concrete or cast iron.
Further, the upper part of the baffle 13 is provided with an overflow weir.
Further, the baffle 13 and the partition boards 40 and 50 are made of stainless steel, glass fiber reinforced plastic, polyvinyl chloride, aluminum alloy or titanium alloy.
Further, the retention tank main body baffle 23 is 300mm lower than a baffle 13200 of the initial rainwater discarding and distributing well 10.
Furthermore, a permeable geotextile is laid between the gravel layer 21 and the filler layer 22.
The mixed flow non-concave biological detention pool with the initial rainwater discarding function has the following beneficial effects:
(1) the initial rainwater flow discarding and distributing well of the detention pond can realize primary separation of large-particle pollutants of initial rainwater with heavy pollution, and primarily purifies pollutants of runoff;
(2) the detention pool has no concave requirement, can effectively reduce the granular pollutants in the runoff entering the detention pool, obviously reduce the possibility of blockage of the biological detention pool, and ensure the long-term and high-efficiency operation of facilities;
(3) in the middle and later periods of rainfall of the detention pond, after the initial rainwater discarding and water distribution well part is filled, rainwater passes through the rainwater grate and the cover plate of the left rainwater discarding and water distribution well part and then enters the outflow water collecting well through the vegetation area, and the vegetation area also has the surface flow wetland effect, further purifies the rainwater and converges with the rainwater runoff filtered in the early period to enter the rainwater pipeline. Through the mixed flow mode of 'upstream + downstream', the increased runoff path of the runoff in the facility can further obviously improve the control effect of the facility on runoff pollution.
Drawings
Fig. 1 is a top view of a mixed-flow non-depressed bioretention tank having an incipient rain water runoff function according to an embodiment of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B in fig. 1.
Fig. 4 is a sectional view of C-C in fig. 1.
Fig. 5 is a sectional view taken along line D-D in fig. 1.
Fig. 6 is a schematic diagram of the operation of a mixed-flow non-concave bioretention pond with an initial rainwater discarding function according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1 to 5, a mixed flow non-depressed biological retention basin with initial rainwater discarding function according to an embodiment of the present invention is illustrated. The detention pool is provided with a bottom and a side wall, wherein the bottom of the detention pool is a concrete bottom surface, and the side wall is a cement mortar brick wall, concrete or polyvinyl chloride integrated forming material plastered by cement mortar. The detention pond comprises three parts of an initial rainwater discarding and distributing well 10, a detention pond main body 20 and an overflow and outflow collecting well 30. The initial rainwater drainage and distribution well 10 is usually disposed at the water collection port of the road edge. The initial rainwater discarding and distributing well 10 and the retention basin body 20, and the retention basin body 20 and the overflow and outflow water collecting well 30 are divided into relatively independent areas by partition plates 40 and 50, and communication holes 41 and 51 are respectively arranged below the partition plates 40 and 50 to communicate the adjacent areas. The partition boards 40 and 50 are made of stainless steel, glass fiber reinforced plastic, polyvinyl chloride, aluminum alloy or titanium alloy.
The initial rainwater drainage and distribution well 10 comprises an initial rainwater storage area 11 and a water distribution area 12 which are separated by a baffle 13, the water distribution area 12 is adjacent to the detention pond main body through a partition plate 40, and the top of the water distribution area 12 is provided with a cover plate 14 for preventing the initial rainwater from directly flowing in. The cover plate 14 is made of concrete or cast iron. The upper part of the baffle 13 is provided with an overflow weir 15, and the baffle 13 is made of stainless steel, glass fiber reinforced plastic, polyvinyl chloride, aluminum alloy or titanium alloy. The top of the initial rainwater storage area 11 is provided with a rainwater grate 16 for preventing sundries from flowing in, and the rainwater grate is made of cast iron or concrete.
The detention pool main body 20 is divided into a gravel layer 21 and a packing layer 22 from bottom to top, and a main body baffle 23 extending from the bottom to the inside of the packing layer 22 is arranged in the main body, and in order to ensure the acting water head, the main body baffle 23 of the detention pool is 200 mm and 300mm lower than the baffle 13 of the initial rainwater discarding and distributing well 10. The main body baffle 23 is made of stainless steel, glass fiber reinforced plastic, polyvinyl chloride, aluminum alloy or titanium alloy. Above the filler layer 22, a vegetation layer can be further designed. A permeable geotextile is laid between the filler layer 22 and the gravel layer 21 to prevent the fine particle filler from entering the gravel layer 21. A water distribution pipe 24 is laid in the gravel layer on one side close to the water distribution area, one end of the water distribution pipe 24 is connected with the water distribution area 12, the other end of the water distribution pipe is a plug, the side wall of the water distribution pipe is provided with a plurality of through holes, and the aperture of the through holes is smaller than the particle size of the minimum graded gravel of the gravel layer, so that the particles of the gravel layer are prevented from entering the water distribution pipe 24. And laying a water collecting pipe 25 on the gravel layer on one side close to the water collecting area, wherein one end of the water collecting pipe is a plug, the other end of the water collecting pipe is connected with the outflow water collecting well 30, the side wall of the water collecting pipe is provided with a plurality of through holes, and the aperture of the through holes is smaller than the diameter of the minimum graded gravel of the gravel layer. The lower part of the outflow water collecting well 30 is provided with a water outlet 31 which is communicated with a rainwater pipeline.
The operation principle and the operation process of the mixed flow non-concave biological detention pool with the initial rainwater discarding function according to the embodiment of the invention are as follows:
after rainfall runoff, rainwater runoff with heavy initial pollution enters the initial rainwater storage area 11 through the rainwater grate, and large-particle pollutants in the initial rainwater are gradually deposited to the bottom sediment area and stored. With continuous rainfall and rising water level, when the initial rainwater storage area reaches the height of the overflow weir 15 of the baffle 13, the overflow enters the water distribution area 12 and enters the biological detention pool main body through the water distribution pipe 24, and the 'up flow' + 'down flow' permeation process can be realized because the main body baffle 23 is arranged in the middle of the detention pool main body. Compared with the traditional facility, the seepage path is prolonged, and the runoff pollution control effect can be obviously improved. The run-off rainwater subjected to the infiltration treatment is collected through the bottom water collecting pipe 25, enters the outflow water collecting well 30 and is discharged into the municipal rainwater pipeline through the drainage pipe.
In the middle and later periods of rainfall, after the initial rainwater discarding and water distribution well part is full, rainwater passes through the vegetation area and enters the outflow water collecting well after passing through the rainwater grate and the cover plate of the left rainwater discarding and water distribution well part, the vegetation area also has the surface flow wetland effect, the rainwater is further purified, and the rainwater is converged with the rainwater runoff filtered in the early period and enters the rainwater pipeline. Through the mixed flow mode of 'upstream + downstream', the increased runoff path of the runoff in the facility can further obviously improve the control effect of the facility on runoff pollution.
After rainfall is finished, rainwater accumulated in the initial rainwater area is in a static precipitation stage, wherein particulate pollutants can be gradually deposited to a bottom sediment area, solid-liquid separation is realized to a certain degree, clear water at the upper part can be dissipated through an evaporation part in non-rainfall days, and sediment at the bottom can be regularly removed.
Although the heavy runoff with initial pollution is separated, and the large-particle pollutants entering the rainwater bioretention pond are reduced, the water distribution area still has a small amount of maintenance requirements for the long-term operation of the facility. The top of the water distribution area is provided with a cover plate, and the cover plate can be opened periodically on non-rainfall days to perform operation maintenance on the water distribution area and the water distribution pipe under the required condition.
The mixed flow non-concave biological detention pond with the initial rainwater discarding function can realize effective discarding and separation of initial rainwater and effectively control runoff pollution; compared with the traditional biological detention facility, the invention has no concave requirement, can realize the runoff control of rainwater under the condition of no concave (even the 'high green land' can be adopted, and the runoff control is realized under the condition that the vegetation area is higher than the surrounding terrace); by discarding the initial rainwater, particulate pollutants in runoff entering the facility can be effectively reduced, the possibility of blockage of the bioretention pond is obviously reduced, and the long-term high-efficiency operation of the facility is guaranteed; in the middle and later periods of rainfall of the detention pond, after the initial rainwater discarding and water distribution well part is filled, rainwater passes through the rainwater grate and the cover plate of the left rainwater discarding and water distribution well part and then enters the outflow water collecting well through the vegetation area, and the vegetation area also has the surface flow wetland effect, further purifies the rainwater and converges with the rainwater runoff filtered in the early period to enter the rainwater pipeline. Through the mixed flow mode of 'upstream + downstream', the increased runoff path of the runoff in the facility can further obviously improve the control effect of the facility on runoff pollution.
The invention is based on the embodiments with reference to the drawings, and the technical features described and disclosed in detail are not limited thereto. It will be understood by those skilled in the art to which the present invention pertains that various modifications may be made without departing from the true scope and spirit of the invention as claimed in the claims. Therefore, various modifications to the present invention are to be construed as covering all the embodiments within the scope of the claims of the present invention.
Claims (10)
1. A mixed flow non-concave biological detention pool with initial rainwater discarding function, which has a bottom and a side wall, is characterized in that the detention pool comprises three parts of an initial rainwater discarding and distributing well (10), a detention pool main body (20) and an overflow and outflow collecting well (30),
the initial rainwater discarding and distributing well (10) and the retention tank body (20), and the retention tank body (20) and the overflow and outflow water collecting well (30) are divided into relatively independent areas by partition boards (40, 50), communication holes (41, 51) are respectively arranged below the partition boards (40, 50) to communicate the two adjacent areas,
the initial rainwater discarding and distributing well (10) comprises an initial rainwater storage area (11) and a water distribution area (12) which are separated by a baffle plate (13), the water distribution area (12) is adjacent to the detention pond main body through a partition plate (40), the top of the water distribution area (12) is provided with a cover plate (14) for preventing rainwater from directly flowing into,
the detention pool main body (20) is divided into a gravel layer (21) and a packing layer (22) from bottom to top, and a main body baffle plate (23) extending from the bottom to the inside of the packing layer (22) is arranged in the main body,
the height of the baffle (13) is higher than that of the main body baffle (23);
a water outlet (31) is arranged below the overflow and outflow water collecting well (30) and is communicated with a rainwater pipeline.
2. The mixed-flow non-concave bioretention pond with initial rainwater abandoning function of claim 1 wherein the bottom of the detention pond is a concrete bottom surface and the side wall is a cement mortar brick wall plastered by cement mortar, concrete or polyvinyl chloride integrated molding material.
3. The mixed flow non-concave bioretention pond with initial rainwater abandoning function according to claim 1, wherein the top of the initial rainwater storage area (11) is provided with a rainwater grate for preventing the inflow of impurities, and the rainwater grate is made of cast iron or concrete.
4. The mixed flow non-depressed bioretention pond with initial rainwater abandoning function according to claim 1, characterized in that there is a vegetation layer above the packing layer (22).
5. The mixed-flow non-recessed bioretention pond with initial rainwater discarding function according to claim 1, wherein the gravel layer (21) of the detention pond main body is respectively provided with a plurality of water distribution pipes (24) with one closed end, the water collection pipe (25) is connected with the communication holes of the partition plates (40, 50), and a plurality of water outlet holes are distributed on the side walls of the water distribution pipes (24) and the water collection pipe (25).
6. The mixed-flow non-depressed bioretention pond with initial rainwater runoff function of claim 1 wherein the cover plate (14) is of concrete or cast iron.
7. A mixed-flow non-depressed bioretention pond with initial rainwater runoff function according to claim 1 wherein the baffle (13) has an overflow weir (15) above it.
8. The mixed flow non-concave bioretention pond with initial rainwater abandoning function according to claim 1 wherein the baffle (13) and the partition plates (40, 50) are made of stainless steel, glass fiber reinforced plastic, polyvinyl chloride, aluminum alloy or titanium alloy.
9. The mixed flow non-concave biological retention tank with initial rainwater drainage function as claimed in claim 1, wherein the retention tank main body baffle (23) is 200 mm and 300mm lower than a baffle (13) of the initial rainwater drainage and distribution well (10).
10. A mixed-flow non-recessed bioretention pond with initial rainwater abandoning function according to claim 1 wherein a permeable geotextile is laid between the gravel layer (21) and the packing layer (22).
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| CN109809632A (en) * | 2019-02-01 | 2019-05-28 | 江苏大学 | A kind of biological delaying basin improving denitrogenation dephosphorizing ability |
| CN110130461A (en) * | 2019-05-29 | 2019-08-16 | 合肥亿境景观建筑设计有限公司 | A kind of rain of Landscape Forest, the compensation supply and drain water system of water |
| CN110240358A (en) * | 2019-06-19 | 2019-09-17 | 哈尔滨工业大学 | It is a kind of for purifying the combined type filter tank of contaminated urban rainwater water quality |
| CN110759481A (en) * | 2019-11-05 | 2020-02-07 | 南京工业大学 | Biological detention pond of high-efficient dephosphorization |
| CN110818196A (en) * | 2019-11-25 | 2020-02-21 | 张锦霞 | System and method for purifying and recycling surface runoff water resource |
| CN111305348A (en) * | 2020-03-05 | 2020-06-19 | 重庆文理学院 | Non-excavation formula biological detention system |
| CN111255042B (en) * | 2020-03-09 | 2021-03-05 | 北京建筑大学 | Ecological tree pool with floater for automatically controlling initial rainwater drainage and working method |
| CN113493249A (en) * | 2021-06-07 | 2021-10-12 | 江苏金陵环境股份有限公司 | Method for treating escherichia coli in tail water of sewage plant |
| CN115010323B (en) * | 2022-06-27 | 2023-06-30 | 重庆大学 | Two-way water inlet type rainwater biological detention pond |
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| CN102359172B (en) * | 2011-08-22 | 2013-07-10 | 重庆大学 | City life residential area rainwater shunting, collecting and disposal system |
| CN103073111B (en) * | 2013-02-01 | 2014-06-11 | 北京建筑工程学院 | Urban road rainfall runoff ecological coprocessing device and method |
| CN103758201B (en) * | 2014-01-14 | 2015-10-21 | 北京建筑大学 | Band floods the clean integrated apparatus of surface flow rain-water accumulating and the method for culvert pipe |
| CN204570880U (en) * | 2015-04-18 | 2015-08-19 | 重庆文理学院 | A kind of urban road storm runoff purifier |
| CN105220757B (en) * | 2015-09-22 | 2017-03-22 | 北京建筑大学 | Combined device for treating road runoff rainwater |
| CN105753158A (en) * | 2016-03-04 | 2016-07-13 | 重庆文理学院 | Application of nandina domestica to biological retention systems |
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