CN105672459A - Low-elevation greenbelt for reducing urban initial-rainwater runoff pollution - Google Patents
Low-elevation greenbelt for reducing urban initial-rainwater runoff pollution Download PDFInfo
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- CN105672459A CN105672459A CN201610078156.0A CN201610078156A CN105672459A CN 105672459 A CN105672459 A CN 105672459A CN 201610078156 A CN201610078156 A CN 201610078156A CN 105672459 A CN105672459 A CN 105672459A
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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
- 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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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- E03F5/102—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins using already existing parts of the sewer system for runoff-regulation
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Public Health (AREA)
- Health & Medical Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a low elevation greenbelt for reducing urban initial-rainwater runoff pollution which comprises a low elevation greenbelt, a plurality of water retaining walls and a water catchment ditch, wherein the low elevation greenbelt is composed of a first section and a second section; a filler layer is horizontally laid on the first section; aquatic plants are planted in the filler layer; the water retaining walls are inserted in the filler layer; the bottoms of the water retaining walls are flush with the lower surface of the filler layer or extend out of the lower surface of the filler layer; the tops of the water retaining walls are flush with the upper surface of the filler layer or extend out of the upper surface of the filler layer; openings are formed in the water retaining walls; one water retaining wall is arranged at the junction of the first section and the second section; a reservoir is defined by the water retaining wall arranged at the junction of the first section and the second section, and inner side walls of the second section and the low elevation greenbelt; the water catchment ditch is formed around the outside of the low elevation greenbelt; a water inlet is formed inside the water catchment ditch; the water inlet is communicated with the low elevation greenbelt and the water catchment ditch. The low elevation greenbelt for reducing urban initial-rainwater runoff pollution can effectively alleviate the hydraulic load of urban initial-rainwater runoff pollution, so as to enhance the removal capability of the low elevation greenbelt to complex pollutants.
Description
Technical field
The present invention relates to city initial rainwater runoff pollution control field. It is more particularly related to a kind of concave green belt cutting down city initial rainwater runoff pollution.
Background technology
Along with city rainfall runoff washes away in the process confluxed, swept along a large amount of pollutant of accumulation on the different cities underlying surfaces such as air and roofing, road surface, community, greenery patches and pavement of road, unprocessed it is directly discharged in the receiving water body of city, cause the severe contamination of urban rivers and lakes water system, destroy the aquatic environment in city, also have a strong impact on the daily life of receiving water body nearby residents. Rainwater runoff pollution has bigger randomness, occasionality and popularity, and pollutional load change in time and space amplitude is big, research, controls and the difficulty that processes is also big. Non-point pollution caused by rainfall runoff has become one of key factor of Urban Water Environment pollution.
The development trend of current domestic rainfall runoff management is the enforcement controlled flood and drained flooded fields by attention, strengthen Rainwater Resources gradually and utilize the research with rainwater runoff pollution control technology and application development, to promote distributing rationally of urban rainwater resources, safeguard the ecological balance of city water cycle. Concave green belt is the one of greenery patches rainwater storage technology, more common greenery patches, and concave green belt utilizes the lower abundant rainwater harvest of concave space, significantly increases the rainwater infiltration time. There is infiltration rainwater, flood peak clipping flow and alleviate the advantages such as rainwash pollution.
The reduction of runoff pollution is by plant absorption utilization, soil matrix absorption and the coefficient result of Medium Culture microorganism three by concave green belt. Hydraulic detention time is shorter, causes that greenery patches is to COD, NH4 +The reduction of-N and TP relies primarily on the physical actions such as mechanical filter and the absorption of filtration media and cover plant, and in soil media, the Degradation of microorganism and the effect that absorbs of greenery patches cover plant are not yet not fully exerted.
Summary of the invention
It is an object of the invention to provide a kind of concave green belt cutting down city initial rainwater runoff pollution, it can reduce the rainwash hydraulic load at concave green belt, give full play to the biological chemistry action of plant and soil microorganism, improve the ability removing complicated pollutant, realize the high-efficient purification ability of concave green belt, after making city overland runoff sewage purification, stagnant storage is permeated on the spot, effectively solves city overland runoff and pollute while recharge of groundwater.
In order to realize these purposes according to the present invention and further advantage, it is provided that a kind of concave green belt cutting down city initial rainwater runoff pollution, including:
Concave green belt, it is made up of less second piece of area bigger first piece and area, and described first piece of upper level is equipped with packing layer, described packing layer is planted and is implanted with water plant;
Polylith dash partition wall, it is vertically inserted in described packing layer in interval, the bottom of described dash partition wall flushes with the lower surface of described packing layer or extends its lower surface, described dash is every the upper surface flush of coping and described packing layer or extends its upper surface, the both sides of described dash partition wall are all fixing with the medial wall of described concave green belt to be connected, so that described packing layer is divided into multiple purifying area, the top of described dash partition wall is provided with an opening, the lowest point of described opening is between the upper and lower surface of described packing layer, the intersection of described first piece and described second piece is provided with one piece of dash partition wall, and be positioned at described first piece and described second piece intersection dash partition wall on aperture position higher than described second piece, cistern is surrounded with the medial wall of described second piece and described concave green belt by the dash partition wall of intersection being positioned at described first piece and described second piece,
Charge for remittance ditch, the arranged outside of concave green belt described in its ring, the inner side of described charge for remittance ditch is provided with at least one water inlet, described water inlet all connects with inside described concave green belt and described charge for remittance ditch, and the rainwater from the described water inlet described concave green belt of entrance all flow to and the purifying area of described second piece of furthest apart, height inside charge for remittance ditch bottom of trench is not higher than the height outside described charge for remittance ditch bottom of trench, the height of the lowest point of described water inlet is equal with the height inside described charge for remittance ditch bottom of trench, and is not less than the height at the top of described packing layer.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, described polylith dash partition wall is parallel to each other, and is crisscross arranged about the opening on adjacent two pieces of dash partition walls.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, at least one water inlet described is a water inlet, described water inlet and being crisscross arranged about the opening on described dash partition wall corresponding thereto.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, described packing layer is followed successively by gravel layer, zeolite layer, biological ceramic particle layer and gravel layer from top to bottom, and the thickness of every layer is 10mm.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, bottom and the top of described dash partition wall flush with the upper and lower surface of described packing layer respectively, the upper surface flush of the highest point of described opening and described packing layer, described opening is arranged on the side of described dash partition wall.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, the height inside described charge for remittance ditch bottom of trench is lower than the height outside described charge for remittance ditch bottom of trench, and the gradient of described charge for remittance ditch bottom of trench is 2%～8%.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, described water inlet is vertically arranged at intervals with many metal grate, and the spacing between described metal grate is 10mm.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, the medial wall of described concave green belt and bottom are all equipped with antiseepage film.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, the height of the highest point of described metal grate is lower than the height of the highest point of described water inlet.
Preferably, in the concave green belt of described reduction city initial rainwater runoff pollution, also include:
Backing plate, its level is laid on position relative with described water inlet on described packing layer, the size being sized larger than described water inlet of described backing plate, the side of described backing plate is fixing with the medial wall of described concave green belt to be connected, and the curved surface of side of described backing plate fits with the medial wall of described concave green belt, described backing plate is vertically arranged at intervals with multiple first hole, location;
Base plate, its level is laid on described backing plate, described base plate is arranged at intervals with multiple through hole, the size of described base plate is equivalently-sized with described backing plate, described base plate is vertically arranged at intervals with multiple second hole, location, described first hole, location and the described second equivalently-sized and one_to_one corresponding positioning hole;
Many are filtered thorn, it is disposed on the upper surface of described base plate, and the described thorn that filters is for taper, and one end that described filtration thorn is relatively large in diameter is fixing with described base plate to be connected, and with described through hole and described second location hole do not interfere, described filter thorn between be smaller than 10mm;
Many latches, each described first hole, location and second positioning in hole and be provided with a latch corresponding thereto.
The present invention at least includes following beneficial effect:
The present invention is by arranging left right-alternative opening, runoff pollution is made to form circuitous channel in purifying area, thus reducing rainwater runoff pollution hydraulic load in concave green belt, extend hydraulic detention time, give full play to the biological chemistry action of plant and soil microorganism, improve the ability removing complicated pollutant, it is achieved the high-efficient purification ability of concave green belt.
The present invention is planting aquatic plants on packing layer, existing beautification of landscape effect, can play again plant purification effect.
The present invention is provided with metal grate in water inlet, it can retain the big pollutant such as leaves, cigarette end and house refuse, early-stage rainwater is filtered for the first time, because the height of highest point of metal grate is lower than the height of the highest point of water inlet, when later stage rainfall is bigger, metal grate Partial Blocking or completely plugged after, later stage rainwater can directly enter concave green belt above metal grate, improve the stability of concave green belt.
The position that the present invention is relative with water inlet on packing layer is equipped with backing plate and base plate, base plate is provided with filtration thorn, the rainwater entered concave green belt from water inlet flow on base plate, little pollutant are made to be trapped in the space filtered between thorn, and the impact of rainwater can also be played cushioning effect by base plate and filtration thorn, it is prevented that rainwater directly washes away packing layer.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part is also by by being understood by those skilled in the art the research of the present invention and practice.
Accompanying drawing explanation
Fig. 1 is the structural representation of concave green belt of the present invention;
Fig. 2 is packing layer of the present invention and the structural representation of dash partition wall;
Fig. 3 is the structural representation of dash partition wall of the present invention;
Fig. 4 is the structural representation of water inlet of the present invention;
Fig. 5 is the structural representation of water inlet of the present invention and base plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to description word.
It should be noted that, in describing the invention, term " transverse direction ", " longitudinal direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, be not instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
As shown in Figures 1 to 5, the present invention provides a kind of concave green belt 100 cutting down city initial rainwater runoff pollution, including:
Concave green belt 100, it is made up of less second piece of area bigger first piece and area, and described first piece of upper level is equipped with packing layer 110, described packing layer 110 is planted and is implanted with water plant; Optional drought-enduring moisture-proof and have the plant of high-efficient purification effect, such as Rhizoma Acori Graminei and Rhizoma Acori Graminei, existing beautification of landscape effect, can play again plant purification effect.
Polylith dash partition wall 120, it is vertically inserted in described packing layer 110 in interval, the bottom of described dash partition wall 120 flushes with the lower surface of described packing layer 110 or extends its lower surface, the upper surface flush of the top of described dash partition wall 120 and described packing layer 110 or extend its upper surface, the both sides of described dash partition wall 120 are all fixing with the medial wall of described concave green belt 100 to be connected, so that described packing layer 110 is divided into multiple purifying area 111, the top of described dash partition wall 120 is provided with an opening 121, the lowest point of described opening 121 is between the upper and lower surface of described packing layer 110, when the upper surface of packing layer 110 is extended at the top of dash partition wall 120, the highest point of opening 121 can be higher than the upper surface of packing layer 110, may be lower than the upper surface of packing layer 110, as long as the lowest point of opening 121 is between the upper and lower surface of packing layer 110, then rainwater one flow to next stage purifying area from upper level purifying area surely, the intersection of described first piece and described second piece is provided with one piece of dash partition wall 120, and be positioned at described first piece and described second piece intersection dash partition wall 120 on opening 121 position higher than described second piece, cistern 101 is surrounded with the medial wall of described second piece and described concave green belt 100 by the dash partition wall 120 of intersection being positioned at described first piece and described second piece,
Charge for remittance ditch 130, the arranged outside of concave green belt 100 described in its ring, the inner side of described charge for remittance ditch 130 is provided with at least one water inlet 131, described water inlet 131 is internal with described concave green belt 100 and described charge for remittance ditch 130 all to be connected, and enter the rainwater described concave green belt 100 from described water inlet 131 and all flow to and the purifying area of described second piece of furthest apart, such rainwater can by flowing in cistern 101 after filtering step by step, height inside charge for remittance ditch 130 bottom of trench is not higher than the height outside described charge for remittance ditch 130 bottom of trench, the height of the lowest point of described water inlet 131 is equal with the height inside described charge for remittance ditch 130 bottom of trench, and it is not less than the height at the top of described packing layer 110, rainwater in such charge for remittance ditch 130 can all flow in concave green belt 100, and first it flow to the surface of packing layer 110, permeate gradually still further below and constantly filter. namely near the side of concave green belt 100 inside charge for remittance ditch 130 bottom of trench, namely away from the side of concave green belt 100 outside charge for remittance ditch 130 bottom of trench.Rainwater flows in charge for remittance ditch 130, because the height inside charge for remittance ditch 130 bottom of trench is not higher than the height outside charge for remittance ditch 130 bottom of trench, i.e. charge for remittance ditch 130 bottom of trench level, or charge for remittance ditch 130 bottom of trench inside height is relatively low, so, rainwater can pass through water inlet 131 and flow into the purifying area with second piece of furthest apart, i.e. first order purifying area.
In early-stage rainwater, pollutant are more, rainfall is less, after rainwater circulates step by step from first order purifying area to the purifying area (afterbody purifying area) adjacent with second piece and filters, rainwater after filtration flows in cistern 101 by the opening 121 on the dash partition wall 120 of the intersection of first piece and second piece, rainwater in cistern 101 can be used for treegarden irrigation and landscape water, it is possible to flows directly into river course or imports in subsoil water. In purifying area 111, filler and water plant can pass through the physical action such as mechanical filter and absorption and cut down pollutant, the metabolism of root system of plant and the biological chemistry action of microorganism simultaneously can be not fully exerted, and by the synergism of filler-plant-microorganism, early-stage rainwater runoff pollution is effectively cut down.
Middle and late stage rain water pollutant is less, and when rainfall is also less, filter type is identical with early-stage rainwater. because of the top of dash partition wall 120 and the upper surface flush of packing layer 110 or extend its upper surface, when rainfall is bigger, and during the upper surface flush of the top of dash partition wall 120 and packing layer 110, excessive rainwater can directly flow to cistern 101 from the surface of packing layer 110, when the top of packing layer 110 is extended at the top of dash partition wall 120, and the highest point of opening 121 lower than the upper surface of packing layer 110 time, the top of dash partition wall 120 can not be extended too much, in order to avoid when rainfall is bigger, rainwater can not directly flow to cistern 101 from the upper surface of packing layer 110, if but upper surface that packing layer 110 is extended at the top of dash partition wall 120 is too many, rainwater can collect in first order purifying area, only by the downward first class purification district transition of opening 121, or when rainfall is very big, top directly through dash partition wall 120 enters next stage purifying area, when the top of packing layer 110 is extended at the top of dash partition wall 120, and dash partition wall 120 higher than packing layer 110 a lot of time, the upper surface higher than packing layer 110 that can be arranged by the highest point of opening 121, such rainwater also can directly flow to cistern 101 from the upper surface of packing layer 110. it is typically in actual implementation process, considers from the angle saving cost, that the top of dash partition wall 120 is arranged with packing layer 110 upper surface flush, but other forms also can realize the purpose of the present invention, belongs to protection scope of the present invention.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, described polylith dash partition wall 120 is parallel to each other, and the opening about 121 on adjacent two pieces of dash partition walls 120 is crisscross arranged. Such rainwater can flow to opposite side from the side of upper level purifying area, it flow to next stage purifying area from the opposite side of upper level purifying area again, runoff pollution is made to form circuitous channel in purifying area 111, thus reducing rainwater runoff pollution hydraulic load in concave green belt 100, extend hydraulic detention time, give full play to the biological chemistry action of plant and soil microorganism, improve the ability removing complicated pollutant, it is achieved the high-efficient purification ability of concave green belt 100. To be crisscross arranged be with the middle part of dash partition wall for reference point in left and right, the left side seen towards dash partition wall and the right.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, at least one water inlet 131 described is a water inlet 131, and described water inlet 131 and the opening about 121 on described dash partition wall 120 corresponding thereto are crisscross arranged. So can increase the rainwater time of staying in first order purifying area.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, described packing layer 110 is followed successively by gravel layer, zeolite layer, biological ceramic particle layer and gravel layer from top to bottom, and the thickness of every layer is 10mm.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, the bottom of described dash partition wall 120 and top flush with the upper and lower surface of described packing layer 110 respectively, the upper surface flush of the highest point of described opening 121 and described packing layer 110, described opening 121 is arranged on the side of described dash partition wall 120. Packing layer 110 so can be divided into multiple purifying area 111, opening 121 can be passed through again and connect each purifying area 111, moreover it is possible to save cost.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, the height inside described charge for remittance ditch 130 bottom of trench is lower than the height outside described charge for remittance ditch 130 bottom of trench, and the gradient of described charge for remittance ditch 130 bottom of trench is 2%～8%. Because charge for remittance ditch 130 bottom of trench is provided with the gradient, be conducive to rainwater to pass through water inlet 131 and flow into first order purifying area, if the gradient is too little, easily causes and charge for remittance ditch 130 collects a large amount of rainwater, it is impossible to timely enter first order purifying area; If the gradient is too big, water inlet 131 not only can be impacted when flowing into concave green belt 100 from charge for remittance ditch 130 by rainwater, and can the filler near water inlet and plant be impacted.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, described water inlet 131 place is vertically arranged at intervals with many metal grate 140, and the spacing between described metal grate 140 is 10mm. So retaining the pollutant such as leaves, cigarette end and house refuse, float and bulky grain pollutant in city initial rainwater runoff are undertaken precipitating and filtering by charge for remittance ditch 130, and charge for remittance ditch needs periodic cleaning. Other float etc. are undertaken degrading and adsorbing by purifying area 111.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, medial wall and the bottom of described concave green belt 100 are all equipped with antiseepage film. Packing layer 110 and concave green belt 100 are separated, so can prevent the sewage permeation after stain subsoil water in processing.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, the height of the highest point of described metal grate 140 is lower than the height of the highest point of described water inlet 131. If metal grate 140 is not cleared up in time, Partial Blocking or after completely plugged, the part that the later stage rainwater in charge for remittance ditch 130 can pass through between top and the highest point of water inlet 131 of metal grate 140 flows in concave green belt 100.
In the concave green belt 100 of described reduction city initial rainwater runoff pollution, also include:
Backing plate 150, its level is laid on position relative with described water inlet 131 on described packing layer 110, the size being sized larger than described water inlet 131 of described backing plate 150, the side of described backing plate 150 is fixing with the medial wall of described concave green belt 100 to be connected, and the curved surface of side of described backing plate 150 fits with the medial wall of described concave green belt 100, described backing plate 150 is vertically arranged at intervals with multiple first hole, location;
Base plate 160, its level is laid on described backing plate 150, described base plate 160 is arranged at intervals with multiple through hole, the size of described base plate 160 is equivalently-sized with described backing plate 150, described base plate 160 is vertically arranged at intervals with multiple second hole 161, location, described first hole, location and the described second equivalently-sized and one_to_one corresponding positioning hole 161;
Many are filtered thorn 162, it is disposed on the upper surface of described base plate 160, the described thorn 162 that filters is for taper, the one end being relatively large in diameter in described filtration thorn 162 is fixing with described base plate 160 to be connected, and with described through hole and described second location hole 161 do not interfere, described filter thorn 162 between be smaller than 10mm;
Many latches, each described first hole, location and second positioning in hole 161 and be provided with a latch corresponding thereto. Position relative with water inlet 131 on packing layer 110 is equipped with backing plate 150 and base plate 160, base plate 160 is provided with filtration thorn 162, enter the rainwater concave green belt 100 from water inlet 131 and flow on base plate 160, partial contamination thing is made to be trapped in the space filtered between thorn 162, rainwater can be filtered further, and the impact of rainwater can also be played cushioning effect by base plate 160 and filtration thorn 162, it is prevented that rainwater directly washes away packing layer 110.
Can base plate 160 be fixed on backing plate 150 by latch, thus fixing base plate 160, pollutant it are full of between thorn 162 when filtering, when needing to clean, only need to extract latch out, base plate 160 can be taken off, during cleaning, giant is faced toward the lower surface of base plate 160, by through hole, the foreign material filtered between thorn 162 can be gone out. Also by filtering thorn 162 down, a twig can be taken at random, twig is inserted in through hole, then extracts out, the foreign material between filtration thorn 162 can be stabbed out. Because filtering thorn 162 for taper, the space filtered between thorn 162 is gradually increased from top to bottom, thus the various sizes of pollutant from the rainwater that water inlet 131 flows into can be retained, it is equivalent to be provided with the multistorey strainer mesh that mesh aperture is gradually increased from top to bottom, pollutant constantly can be piled up from top to bottom between filtration thorn 162, reducing cleaning frequency, all being blocked by foreign material even if filtering between thorn 162, later stage rainwater may also flow in concave green belt 100.
Although embodiment of the present invention are disclosed as above, but listed utilization that it is not restricted in description and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited to specific details and shown here as the legend with description.
Claims (10)
1. the concave green belt cutting down city initial rainwater runoff pollution, it is characterised in that including:
Concave green belt, it is made up of less second piece of area bigger first piece and area, and described first piece of upper level is equipped with packing layer, described packing layer is planted and is implanted with water plant;
Polylith dash partition wall, it is vertically inserted in described packing layer in interval, the bottom of described dash partition wall flushes with the lower surface of described packing layer or extends its lower surface, described dash is every the upper surface flush of coping and described packing layer or extends its upper surface, the both sides of described dash partition wall are all fixing with the medial wall of described concave green belt to be connected, so that described packing layer is divided into multiple purifying area, the top of described dash partition wall is provided with an opening, the lowest point of described opening is between the upper and lower surface of described packing layer, the intersection of described first piece and described second piece is provided with one piece of dash partition wall, and be positioned at described first piece and described second piece intersection dash partition wall on aperture position higher than described second piece, cistern is surrounded with the medial wall of described second piece and described concave green belt by the dash partition wall of intersection being positioned at described first piece and described second piece,
Charge for remittance ditch, the arranged outside of concave green belt described in its ring, the inner side of described charge for remittance ditch is provided with at least one water inlet, described water inlet all connects with inside described concave green belt and described charge for remittance ditch, and the rainwater from the described water inlet described concave green belt of entrance all flow to and the purifying area of described second piece of furthest apart, height inside charge for remittance ditch bottom of trench is not higher than the height outside described charge for remittance ditch bottom of trench, the height of the lowest point of described water inlet is equal with the height inside described charge for remittance ditch bottom of trench, and is not less than the height at the top of described packing layer.
2. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 1, it is characterised in that described polylith dash partition wall is parallel to each other, and is crisscross arranged about the opening on adjacent two pieces of dash partition walls.
3. the as claimed in claim 1 concave green belt cutting down city initial rainwater runoff pollution, it is characterised in that at least one water inlet described is a water inlet, described water inlet and being crisscross arranged about the opening on described dash partition wall corresponding thereto.
4. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 1, it is characterised in that described packing layer is followed successively by gravel layer, zeolite layer, biological ceramic particle layer and gravel layer from top to bottom, and the thickness of every layer is 10mm.
5. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 2, it is characterized in that, bottom and the top of described dash partition wall flush with the upper and lower surface of described packing layer respectively, the upper surface flush of the highest point of described opening and described packing layer, described opening is arranged on the side of described dash partition wall.
6. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 1, it is characterised in that the height inside described charge for remittance ditch bottom of trench is lower than the height outside described charge for remittance ditch bottom of trench, and the gradient of described charge for remittance ditch bottom of trench is 2%～8%.
7. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 1, it is characterised in that described water inlet is vertically arranged at intervals with many metal grate, and the spacing between described metal grate is 10mm.
8. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 1, it is characterised in that the medial wall of described concave green belt and bottom are all equipped with antiseepage film.
9. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 7, it is characterised in that the height of the highest point of described metal grate is lower than the height of the highest point of described water inlet.
10. the concave green belt cutting down city initial rainwater runoff pollution as claimed in claim 1, it is characterised in that also include:
Backing plate, its level is laid on position relative with described water inlet on described packing layer, the size being sized larger than described water inlet of described backing plate, the side of described backing plate is fixing with the medial wall of described concave green belt to be connected, and the curved surface of side of described backing plate fits with the medial wall of described concave green belt, described backing plate is vertically arranged at intervals with multiple first hole, location;
Base plate, its level is laid on described backing plate, described base plate is arranged at intervals with multiple through hole, the size of described base plate is equivalently-sized with described backing plate, described base plate is vertically arranged at intervals with multiple second hole, location, described first hole, location and the described second equivalently-sized and one_to_one corresponding positioning hole;
Many are filtered thorn, it is disposed on the upper surface of described base plate, and the described thorn that filters is for taper, and one end that described filtration thorn is relatively large in diameter is fixing with described base plate to be connected, and with described through hole and described second location hole do not interfere, described filter thorn between be smaller than 10mm;
Many latches, each described first hole, location and second positioning in hole and be provided with a latch corresponding thereto.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610078156.0A CN105672459A (en) | 2016-02-04 | 2016-02-04 | Low-elevation greenbelt for reducing urban initial-rainwater runoff pollution |
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| CN201610078156.0A CN105672459A (en) | 2016-02-04 | 2016-02-04 | Low-elevation greenbelt for reducing urban initial-rainwater runoff pollution |
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| CN105672459A true CN105672459A (en) | 2016-06-15 |
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| CN201610078156.0A Pending CN105672459A (en) | 2016-02-04 | 2016-02-04 | Low-elevation greenbelt for reducing urban initial-rainwater runoff pollution |
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Application publication date: 20160615 |