CN104196277A - Functional rainwater garden suitable for interior of urban community grassy area in Shanghai - Google Patents

Functional rainwater garden suitable for interior of urban community grassy area in Shanghai Download PDF

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CN104196277A
CN104196277A CN201410513176.7A CN201410513176A CN104196277A CN 104196277 A CN104196277 A CN 104196277A CN 201410513176 A CN201410513176 A CN 201410513176A CN 104196277 A CN104196277 A CN 104196277A
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functional
rain garden
garden
slope
thickness
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CN201410513176.7A
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CN104196277B (en
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车生泉
陈舒
阚丽艳
沈子欣
谢长坤
臧洋飞
陈子涵
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上海交通大学
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Abstract

The invention discloses a functional rainwater garden suitable for the interior of an urban community grassy area in Shanghai. The functional rainwater garden suitable for the interior of urban community grassy area in Shanghai comprises pretreatment facilities, a water storage layer, water seepage facilities and an overflow facilities, wherein the pretreatment facilities comprise a ring-shaped side slope and gravels; the ring-shaped side slope is positioned on the periphery of the functional rainwater garden; the gravels are covered on the ring-shaped side slope; the water storage layer is a space formed by the ring-shaped side slope and the bottom of the functional rainwater garden in a horizontally encircling manner; the water seepage facilities are positioned at the bottom of the functional rainwater garden; the overflow facilities comprise an overflow pipe penetrating through the thickness direction of the water storage layer and an overflow drain pipe positioned at the bottom of the functional rainwater garden. The functional rainwater garden suitable for the interior of urban community grassy area in Shanghai provided by the invention can decrease the rainfall runoff peak value, purify water quality, supplement groundwater, reduce pressure on municipal water draining, improve microclimate and lift the livable degree of Shanghai.

Description

A kind of functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai
Technical field
The present invention relates to a kind of functional form Rain Garden, relate in particular to a kind of functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai, belong to storm water management technical field.
Background technology
In recent years, Shanghai Urban " rain island effect " and constantly aggravation of " muddy island effect " impact, occur that city amount of precipitation is obviously greater than the phenomenon in periphery suburb, according to statistics, nearly 1.5 one-tenth on the high side of Fengxian, Jiu Bi suburbs, Xujiahui, nearly 30 year Rainfall in Flood Seasons in 6~September urban district, District of Shanghai.In addition, urbanization speed is accelerated, and in city, river course area significantly reduces, and underlying surface mostly is tarmac road, cement pavement etc., affects water body infiltration.And at present China's standard of drainage is lower, Poor construction quality of terrace-bank, all of these factors taken together all easily causes runoff pollution, seeping phenomenon serious.Compared to large-scale municipal drainage transformation of facility engineering, use the ecological rain flood administrative skill that Rain Garden is relevant to process rainfall runoff and runoff pollution, will be more economically, attractive in appearance and feasible, its backwater effect on the spot also will be more remarkable.
District of Shanghai groundwater table is high, and phreatic water buried depth is generally at 0.5~1.0m.According to impermeability surface runoff polluting property research in Areas in Shanghai City is found, runoff event mean concentration intermediate value is: COD205mg/L, BOD568mg/L, SS185mg/L, NH4+~N3.14mg/L, TP0.40mg/L, TN7.23mg/L, degree of contamination is far above abroad.In addition, Soils of Shanghai Region belongs to clayed soil, and transmission coefficient is little.Groundwater table for Shanghai City is high, surface flow pollutes heavy, the special present situations such as soil viscosity height, be necessary to build a kind of functional form Rain Garden that is suitable for inside, greenery patches, communities in Shanghai, to pretreatment facility in Rain Garden, aquifer, covering layer, plantation layer, transition zone, packing layer, drainage blanket, detailed design is carried out in the structure infiltration of infiltration facility and overfall facility, can better bring into play rainfall runoff is held back to guarantee Rain Garden, regulate and store, filter, absorption, the functions such as purification, and it is connected better mutually with municipal drainage pipe network, thereby effectively reduce rainfall runoff peak value, purify water, recharge of groundwater, slow down municipal drainage pressure, and improve microclimate, promote the livable degree in city.
Through prior art is retrieved and is found, the patent No. is that 201320386006.8 utility model patent discloses a kind of Rain Garden system that is applicable to Mountainous City many sand runoff, this patent comprises Rain Garden and sand and water separating system, it can separate silt particle and rainwater in runoff, reduces silt particle and enters Rain Garden; The patent No. is the test dress that 201110001511.1 patent of invention discloses a kind of permeability coefficient of rainwater garden filling, this patent comprises the method for testing arrangement and dependence test, can be good at the permeability parameters of the filler of testing different gradation, differing texture, different buried depth.In addition, Wang Shufen, Yang Le, Bai Weilan is at " technology and artistic perfect unity---Rain Garden is built analysis " (classical Chinese garden, 2009, 6), Xiang Lu, Li Junqi, Kuang Nuo is at " analysis of Rain Garden method for designing " (water supply and drainage, 2008, 06), Zeng Zhongzhong, literary composition love is in " resolving Portland Rain Garden " (Central China building, 2007, 25), Hou Kelong, Qin Hua, Yang Lili etc. are in " analysis of residential community Rain Garden construction method " (Agriculture of Anhui science, 2011, 39) in, all spoken of its development of Rain Garden, successful case is analyzed, the aspects such as Landscape Application and design Key Points Discussion, but be all confined on the qualitative description and its suggestion developing at home of Rain Garden.Above-mentioned patent and document all do not relate to concrete grammar and the structural parameters that the inner Rain Garden in greenery patches, urban community builds.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide that one can reduce rainfall runoff peak value, purifies water, recharge of groundwater, slow down municipal drainage pressure, and improves microclimate, promotes the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of the livable degree in city.
For achieving the above object, the invention provides a kind of functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai, described functional form Rain Garden is arranged in greenery patches, community, the structure of described functional form Rain Garden comprises pretreatment facility, aquifer, infiltration facility and overfall facility, wherein, described pretreatment facility comprises annular side slope and gravel, and described annular side slope is positioned at the periphery of described functional form Rain Garden, and described gravel is covered in described annular side slope; Described aquifer encloses formed space for the bottom level of described annular side slope and described functional form Rain Garden; Described infiltration facility is positioned at the bottom of described functional form Rain Garden; Described overfall facility comprises the bleed off pipe of the thickness direction that runs through described aquifer and is positioned at the relief sewer of bottom of described functional form Rain Garden, and described bleed off pipe is communicated with described relief sewer.
Further, be disposed with covering layer, plantation layer, transition zone, packing layer and drainage blanket along the thickness direction of described aquifer, described drainage blanket is positioned at the bottom of described functional form Rain Garden.
Further, described covering layer is laid and is formed by microlith, and described tectal thickness is 5cm, and the particle diameter of described microlith is 1~2cm.
Further, described plantation layer comprises fills a prescription soil and plants the vegetation in described formula soil, and described formula soil is evenly mixed with 40% medium sand by 60% Chinese garden planting soil, and the native thickness of described formula is 25~50cm; Described vegetation is perennial herb or the shrub with moisture-proof and drought-enduring performance, and the height of described vegetation is 25~75cm.
Further, described transition zone is laid and is formed by medium sand, and the thickness of described transition zone is 5~10cm, and the particle diameter of described medium sand is 0.35~0.5mm.
Further, described packing layer is laid and is formed by building block brick, and the thickness of described packing layer is 25~35cm, and the particle diameter of described building block brick is 3~5cm.
Further, described infiltration facility is made up of soakaway trench and infiltration gutter; Described soakaway trench is positioned at the bottom of described drainage blanket, and the caliber of described soakaway trench is 12~18cm, and the outer wrap of described soakaway trench has 1~2 layer of geotextiles, and tightens with cord; Described soakaway trench and described infiltration gutter are communicated with.
Further, described infiltration gutter has 1~3% the gradient, and higher one end of described infiltration gutter is communicated with described soakaway trench, and lower one end is communicated with near branch drain or catch-basin.
Further, described bleed off pipe has overfall, and it is the honeycomb type baffle plate of 1~2cm that pore size is installed on described overfall, and described honeycomb type baffle plate exceeds described aquifer 12~17cm, lower than the greenery patches 3cm of described community of periphery, the caliber of described bleed off pipe is 12~17cm.
Further, described relief sewer has 1~3% the gradient, and higher one end of described relief sewer is communicated with described bleed off pipe, and lower one end is communicated with near branch drain or catch-basin.
Further, the area of described functional form Rain Garden is 10~40m 2, aspect ratio is 1.5~2:1, structural thickness is 105~160cm.
Further, described annular side slope is positioned at the junction in described functional form Rain Garden and greenery patches, described community, and the gradient of described annular side slope is 30~35 °, and width is 43~67cm.
Further, the thickness of described gravel is 8~12cm, and particle diameter is 5~8cm.
Further, the bottom of described aquifer is than greenery patches, described community to recessed 15~20cm.
The functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of the present invention can reduce rainfall runoff peak value, purifies water, and recharge of groundwater, slows down municipal drainage pressure, and improves microclimate, promotes the livable degree in city.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the theory structure profile of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of preferred embodiment of the present invention;
Fig. 2 is the theory structure plan view of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of preferred embodiment of the present invention;
Fig. 3 is the theory structure profile of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of embodiment 1;
Fig. 4 is the theory structure plan view of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of embodiment 1;
Fig. 5 is the theory structure profile of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of embodiment 2;
Fig. 6 is the theory structure plan view of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of embodiment 2.
Detailed description of the invention
As shown in Fig. 1~2, preferred embodiment of the present invention provides a kind of functional form Rain Garden 1 that is applicable to inside, greenery patches, communities in Shanghai, and this functional form Rain Garden 1 is positioned at the inside in greenery patches, community 14, and area is 10~40m 2, aspect ratio is 1.5~2:1, and structural thickness is 105~160cm, and its structure comprises pretreatment facility 2, aquifer 3, infiltration facility 9 and overfall facility.Arrow 18 in Fig. 1 and Fig. 2 has been pointed out the flow direction of rainfall runoff.
Wherein, pretreatment facility 2 comprises annular side slope and covers the gravel in annular side slope, and annular side slope is positioned at the junction in functional form Rain Garden 1 and greenery patches, community 14, the gradient of annular side slope is 30~35 °, width is 43~67cm, and the thickness of gravel is 8~12cm, and particle diameter is 5~8cm.
Aquifer 3 encloses formed space for the bottom level of annular side slope and functional form Rain Garden, and the bottom of aquifer 3 is than greenery patches, community to recessed 15~20cm.
Be disposed with covering layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8 along the thickness direction of aquifer 3, drainage blanket 8 is positioned at the bottom of functional form Rain Garden 1.Covering layer 4 is laid and is formed by microlith, and the thickness of covering layer 4 is 5cm, and the particle diameter of microlith is 1~2cm.Plantation layer 5 comprises fills a prescription native and plants the vegetation 11 in formula soil, and formula soil is evenly mixed by 60% Chinese garden planting medium sand native and 40%, and the native thickness of filling a prescription is 25~50cm; Vegetation 11 is for having perennial herb or the shrub of moisture-proof and drought-enduring performance, and the height of vegetation 11 is 25~75cm.Transition zone 6 is laid and is formed by medium sand, and the thickness of transition zone 6 is 5~10cm, and the particle diameter of medium sand is 0.35~0.5mm.Packing layer 7 is laid and is formed by building block brick, and the thickness of packing layer 7 is 25~35cm, and the particle diameter of building block brick is 3~5cm.
Infiltration facility 9 is positioned at the bottom of drainage blanket 8, is made up of soakaway trench 15 and infiltration gutter 12.The caliber of soakaway trench 15 is 12~18cm, and the outer wrap of soakaway trench 15 has 1~2 layer of geotextiles, and tightens with cord.Infiltration gutter 12 has 1~3% the gradient, and higher one end of infiltration gutter 12 is communicated with soakaway trench 15, and lower one end is communicated with near branch drain 16 or catch-basin 17.
Overfall facility comprises the bleed off pipe 19 of the thickness direction that runs through aquifer and is positioned at the relief sewer 13 of functional form Rain Garden 1 bottom.Bleed off pipe 19 has overfall 10, and it is the honeycomb type baffle plate 20 of 1~2cm that pore size is installed on overfall 10, and honeycomb type baffle plate 20 exceeds 12~17cm than aquifer 3, and than the low 3cm in greenery patches, community 14 of periphery, the caliber of bleed off pipe 19 is 12~18cm.Relief sewer 13 has 1~3% the gradient, and higher one end of relief sewer 13 is communicated with bleed off pipe 19, and lower one end is communicated with near branch drain 16 or catch-basin 17.
The operating principle of the functional form Rain Garden that is applicable to inside, greenery patches, communities in Shanghai of preferred embodiment of the present invention is as follows:
(1) while there is rainfall, the rainfall runoff that converge in greenery patches, community 14 is because Action of Gravity Field imports in functional form Rain Garden 1, after the buffering and preliminary filtration of pretreatment facility 2, enter aquifer 3, by the overground part of the vegetation 11 in aquifer 3 block and preliminary purification after, under most of rainfall runoff, ooze, under the water body that oozes pass through successively covering layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8, the precipitation of rainfall runoff process said structure layer in infitration process, absorption, ion-exchange, denitrogenation, after the effects such as biomembrane oxidation and the absorption of plant root to nitrogen phosphorus, reach the object of cutting down runoff pollution and subduing rainfall runoff.
(2) in the time that amount of precipitation is less than 29.9mm/12h, rainfall runoff imports in functional form Rain Garden 1, the rainfall runoff converging by defaulted in deck, flow through successively covering layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8, after successively oozing under slowly, the soil moisture that is used for the greenery patches, community 14 that supplements periphery, the runoff oozing under continuation, by recharge of groundwater, is realized whole absorption cleanings of rainfall runoff.
(3) in the time that amount of precipitation is 30~139.9mm/12h, rainfall runoff imports in functional form Rain Garden 1, the rainfall runoff converging is through Rain Garden deck, flow through successively covering layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8, after successively oozing under slowly, be used for supplementing Soil Surrounding moisture and underground water through the water body part purifying, the water body of the another part that has little time down to ooze enters municipal drainage pipe network through infiltration facility, can cut down 70~80% run-off, remove 70~90% overall contamination.
(4), in the time that amount of precipitation is greater than 140mm/12h, the higher initial rainfall runoff of pollutant levels, through after the holding back, filter, purify of functional form Rain Garden 1, can be removed more than 70% overall contamination, delays flood peak 40~60 minutes simultaneously; In the time that the lower infiltration rate degree of rainfall runoff in Rain Garden system is less than the inflow velocity of flow mode, system gradually ponding to overfall 10 height, rainfall runoff can enter bleed off pipe 19 by overfall 10 rapidly, then directly drain into municipal drainage pipeline, and the ponding that does not reach overfall 10 height in functional form Rain Garden 1 oozes under still continuing, extenuate to a certain extent municipal drainage pressure, reduce periphery ponding.
Embodiment 1:
Between the show house residence of south, view demonstration area, villa district, Xiangcheng District, greenery patches, Suzhou, in greenery patches, functional form Rain Garden 21 is set, in order to collect the runoff of greenery patches 22 interior generations.As shown in Figures 3 and 4, the area of this functional form Rain Garden 21 is 12m 2, being shaped as kidney shape, bottom lengths is 4.8m, and width is 2.5m, and structural thickness is 105cm, and the arrow 40 in Fig. 3 and Fig. 4 has provided the flow direction of rainfall runoff.
The structure of functional form Rain Garden 21 comprises pretreatment facility 23, aquifer 24, infiltration facility 25 and overfall facility.
Wherein, pretreatment facility 23 comprises annular side slope and covers the gravel in annular side slope, and annular side slope is positioned at the junction in functional form Rain Garden 21 and greenery patches 22, the gradient of annular side slope is 35 °, width is 43cm, and the thickness of gravel is 8cm, and particle diameter is 5cm.
Aquifer 24 encloses formed space for the bottom level of annular side slope and functional form Rain Garden 21, and the bottom of aquifer 24 is than greenery patches 22 to recessed 15cm.
Be disposed with covering layer 26, plantation layer 27, transition zone 28, packing layer 29 and drainage blanket 30 along the thickness direction of aquifer 24, drainage blanket 30 is positioned at the bottom of functional form Rain Garden 21.Covering layer 26 is laid and is formed by microlith, and the thickness of covering layer 26 is 5cm, and the particle diameter of microlith is 1cm.Plantation layer 27 comprises fills a prescription native and plants the vegetation 31 in formula soil, and formula soil is evenly mixed by 60% Chinese garden planting medium sand native and 40%, and the native thickness of filling a prescription is 25cm; Vegetation 31 is the short tuber of dwarf lilyturf of height 30cm.The medium sand that transition zone 28 is 0.5mm by particle diameter is laid and is formed, and its thickness is 5cm.Packing layer 29 is laid and is formed by the building block brick of particle diameter 3cm, and the thickness of packing layer 29 is 25cm.
Infiltration facility 25 is positioned at the bottom of drainage blanket 50, is made up of soakaway trench 32 and infiltration gutter 33.The caliber of soakaway trench 32 is 12cm, and the outer wrap of soakaway trench 32 has 1 layer of geotextiles, and tightens with cord.Infiltration gutter 33 has 3% the gradient, and higher one end of infiltration gutter 33 is communicated with soakaway trench 32, and lower one end is communicated with near branch drain 34 or catch-basin 35.
Overfall facility comprises the bleed off pipe 36 of the thickness direction that runs through aquifer 24 and is positioned at the relief sewer 37 of functional form Rain Garden 21 bottoms.Bleed off pipe 36 has overfall 38, and it is the honeycomb type baffle plate 39 of 1cm that pore size is installed on overfall 38, and honeycomb type baffle plate 39 exceeds 12cm than aquifer 24, and than the low 3cm in the greenery patches of periphery 22, the caliber of bleed off pipe 36 is 12cm.Relief sewer 37 has 3% the gradient, and higher one end of relief sewer 37 is communicated with bleed off pipe 36, and lower one end is communicated with near branch drain 34 or catch-basin 35.
According to above design of Structural Parameters, this Rain Garden effective about 80m of rainfall runoff of (12h amount of precipitation is less than 29.9mm) under the large, medium and small raininess degree of purified treatment every year 3, process the highest about 48m of initial rainfall runoff of (12h amount of precipitation is greater than 30mm) pollutant levels under storm intensity 3, the reduction rate of TSS is about to 90%, the reduction rate of COD is about to 60%, the reduction rate of TP is about to 80%, the reduction rate of TN is about to 65%.Meanwhile, this Rain Garden is every year for this sheet greenery patches saving pouring water is about 20 tons.
Embodiment 2:
Between the high residential building residence of Sheng Hui community, marine site, Shanghai Baoshan greenery patches, in greenery patches, functional form Rain Garden 41 is set, in order to collect the runoff of greenery patches 42 interior generations.As illustrated in Figures 5 and 6, the area of this functional form Rain Garden 41 is 39m 2, being shaped as kidney shape, bottom lengths is 8.5m, and width is 4.6m, and structural thickness is 160cm, and the arrow 60 in Fig. 5 and Fig. 6 has provided the flow direction of rainfall runoff.
The structure of functional form Rain Garden 41 comprises pretreatment facility 43, aquifer 44, infiltration facility 45 and overfall facility.
Wherein, pretreatment facility 43 comprises annular side slope and covers the gravel in annular side slope, and annular side slope is positioned at the junction in functional form Rain Garden and greenery patches 42, and the gradient of annular side slope is 30 °, and width is 67cm, and the thickness of gravel is 12cm, and particle diameter is 8cm.
Aquifer 44 encloses formed space for the bottom level of annular side slope and functional form Rain Garden 41, and the bottom of aquifer 44 is than greenery patches 42 to recessed 20cm.
Be disposed with covering layer 46, plantation layer 47, transition zone 48, packing layer 49 and drainage blanket 50 along the thickness direction of aquifer 44, drainage blanket 50 is positioned at the bottom of functional form Rain Garden 41.Covering layer 46 is laid and is formed by microlith, and the thickness of covering layer 46 is 5cm, and the particle diameter of microlith is 1cm.Plantation layer 47 comprises fills a prescription native and plants the vegetation 51 in formula soil, and formula soil is evenly mixed by 60% Chinese garden planting medium sand native and 40%, and the native thickness of filling a prescription is 50cm; Vegetation 51 is the leaflet cape jasmine of height 65cm.The medium sand that transition zone 48 is 0.5mm by particle diameter is laid and is formed, and its thickness is 10cm.Packing layer 49 is laid and is formed by the building block brick of particle diameter 3cm, and the thickness of packing layer 49 is 35cm.
Infiltration facility 45 is positioned at the bottom of drainage blanket 50, is made up of soakaway trench 52 and infiltration gutter 53.The caliber of soakaway trench 52 is 18cm, and the outer wrap of soakaway trench 52 has 2 layers of geotextiles, and tightens with cord.Infiltration gutter 53 has 1% the gradient, and higher one end of infiltration gutter 53 is communicated with soakaway trench 52, and lower one end is communicated with near branch drain 54 or catch-basin 55.
Overfall facility comprises the bleed off pipe 56 of the thickness direction that runs through aquifer 44 and is positioned at the relief sewer 57 of functional form Rain Garden 41 bottoms.Bleed off pipe 56 has overfall 58, and it is the honeycomb type baffle plate 59 of 2cm that pore size is installed on overfall 58, and honeycomb type baffle plate 59 exceeds 17cm than aquifer 44, and than the low 3cm in the greenery patches of periphery, the caliber of bleed off pipe 56 is 18cm.Relief sewer 57 has 1% the gradient, and higher one end of relief sewer 57 is communicated with bleed off pipe 56, and lower one end is communicated with near branch drain 54 or catch-basin 55.
According to above design of Structural Parameters, this Rain Garden effective about 310m of rainfall runoff of (12h amount of precipitation is less than 29.9mm) under the large, medium and small raininess degree of purified treatment every year 3, process the highest about 190m of initial rainfall runoff of (12h amount of precipitation is greater than 30mm) pollutant levels under storm intensity 3, the reduction rate of TSS is about to 90%, the reduction rate of COD is about to 80%, the reduction rate of TP is about to 90%, the reduction rate of TN is about to 75%.Meanwhile, this Rain Garden is every year for this sheet greenery patches saving pouring water is about 78 tons.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (10)

1. one kind is applicable to the functional form Rain Garden of inside, greenery patches, communities in Shanghai, it is characterized in that, described functional form Rain Garden is arranged in greenery patches, community, the structure of described functional form Rain Garden comprises pretreatment facility, aquifer, infiltration facility and overfall facility, wherein, described pretreatment facility comprises annular side slope and gravel, and described annular side slope is positioned at the periphery of described functional form Rain Garden, and described gravel is covered in described annular side slope; Described aquifer encloses formed space for the bottom level of described annular side slope and described functional form Rain Garden; Described infiltration facility is positioned at the bottom of described functional form Rain Garden; Described overfall facility comprises the bleed off pipe of the thickness direction that runs through described aquifer and is positioned at the relief sewer of bottom of described functional form Rain Garden, and described bleed off pipe is communicated with described relief sewer.
2. functional form Rain Garden as claimed in claim 1, is characterized in that, is disposed with covering layer, plantation layer, transition zone, packing layer and drainage blanket along the thickness direction of described aquifer, and described drainage blanket is positioned at the bottom of described functional form Rain Garden.
3. functional form Rain Garden as claimed in claim 2, is characterized in that, described covering layer is laid and formed by microlith, and described tectal thickness is 5cm, and the particle diameter of described microlith is 1~2cm.
4. functional form Rain Garden as claimed in claim 2, it is characterized in that, described plantation layer comprises fills a prescription soil and plants the vegetation in described formula soil, and described formula soil is evenly mixed with 40% medium sand by 60% Chinese garden planting soil, and the native thickness of described formula is 25~50cm; Described vegetation is perennial herb or the shrub with moisture-proof and drought-enduring performance, and the height of described vegetation is 25~75cm.
5. functional form Rain Garden as claimed in claim 2, is characterized in that, described transition zone is laid and formed by medium sand, and the thickness of described transition zone is 5~10cm, and the particle diameter of described medium sand is 0.35~0.5mm.
6. functional form Rain Garden as claimed in claim 2, is characterized in that, described packing layer is laid and formed by building block brick, and the thickness of described packing layer is 25~35cm, and the particle diameter of described building block brick is 3~5cm.
7. functional form Rain Garden as claimed in claim 1, is characterized in that, described infiltration facility is made up of soakaway trench and infiltration gutter; Described soakaway trench is positioned at the bottom of described drainage blanket, and the caliber of described soakaway trench is 12~18cm, and the outer wrap of described soakaway trench has 1~2 layer of geotextiles, and tightens with cord; Described soakaway trench and described infiltration gutter are communicated with.
8. functional form Rain Garden as claimed in claim 7, is characterized in that, described infiltration gutter has 1~3% the gradient, and higher one end of described infiltration gutter is communicated with described soakaway trench, and lower one end is communicated with near branch drain or catch-basin.
9. functional form Rain Garden as claimed in claim 1, it is characterized in that, described bleed off pipe has overfall, it is the honeycomb type baffle plate of 1~2cm that pore size is installed on described overfall, described honeycomb type baffle plate exceeds described aquifer 12~17cm, lower than the greenery patches 3cm of described community of periphery, the caliber of described bleed off pipe is 12~17cm.
10. functional form Rain Garden as claimed in claim 1, it is characterized in that, described relief sewer has 1~3% the gradient, and higher one end of described relief sewer is communicated with described bleed off pipe, and lower one end is communicated with near branch drain or catch-basin.
CN201410513176.7A 2014-09-29 2014-09-29 Functional rainwater garden suitable for interior of urban community grassy area in Shanghai CN104196277B (en)

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CN107514050A (en) * 2017-08-07 2017-12-26 中国建筑设计院有限公司 A kind of AO formula rainwater flower beds based on the storage of sponge urban rainwater, purification
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