CN104196277B - 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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Publication number
CN104196277B
CN104196277B CN201410513176.7A CN201410513176A CN104196277B CN 104196277 B CN104196277 B CN 104196277B CN 201410513176 A CN201410513176 A CN 201410513176A CN 104196277 B CN104196277 B CN 104196277B
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garden
functional type
slope
thickness
rain garden
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CN201410513176.7A
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CN104196277A (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 type Rain Garden being applied within communities in Shanghai greenery patches
Technical field
The present invention relates to a kind of functional type Rain Garden, more particularly, to a kind of it is applied within communities in Shanghai greenery patches Functional type Rain Garden, belongs to storm water management technical field.
Background technology
In recent years, Shanghai Urban " urban dry island effect " and " muddy island effect " impact constantly aggravates, and occurs in that urban precipitation amount It is significantly greater than the phenomenon in periphery suburb, according to statistics, the nearly 30 years 6~September Rainfall in Flood Seasons urban districts in District of Shanghai Xujiahui is just than city Nearly 1.5 one-tenth on the high side of suburb Fengxian.Additionally, urbanization speed is accelerated, in city, river course area is greatly decreased, and underlying surface mostly is pitch Road, cement pavement etc., impact water body infiltration.And current China standard of drainage ratio is relatively low, Poor construction quality of terrace-bank, all these because It is serious that element all easily causes runoff pollution, seeping phenomenon.Compared to large-scale municipal drainage transformation of facility engineering, with rainwater The related ecological storm water man- agement technology in garden, will be more economical, attractive in appearance and feasible processing rainfall runoff and runoff pollution, and it is just Ground backwater effect also will be more notable.
District of Shanghai level of ground water is high, and phreatic water buried depth is typically in 0.5~1.0m.According to Areas in Shanghai City impermeable Property surface runoff polluting property research find, runoff event mean concentration intermediate value is: cod205mg/l, bod568mg/l, Ss185mg/l, nh4+~n3.14mg/l, tp0.40mg/l, tn7.23mg/l, pollution level is far above external.In addition, Shanghai Soils In The Region belongs to clayed soil, and infiltration coefficient is little.Stick for the level of ground water height in Shanghai City, rainwash pollution weight, soil Spend high special present situation it is necessary to construct a kind of functional type Rain Garden being suitable within communities in Shanghai greenery patches, to rain Pretreatment facility, aquifer, cover layer, plantation layer, transition zone, packing layer, drainage blanket, infiltration facility and overflow in spray garden Facility structure infiltration carry out detailed design, with guarantee Rain Garden can more preferably play rainfall runoff is retained, regulates and stores, mistake The functions such as filter, absorption, purification, and so that it is preferably connected with municipal drainage pipe network phase, thus efficiently reducing rainfall runoff peak Value, purifies water, and recharge of groundwater slows down municipal drainage pressure, and improves miniclimate, the livable degree in lifting city.
Find through retrieving to prior art, the utility model patent of Patent No. 201320386006.8 discloses one kind It is applied to the Rain Garden system of Mountainous City many sand runoff, this patent includes Rain Garden and sand and water separating system, its energy Separate the silt particle in runoff and rainwater, reduce silt particle and enter Rain Garden;The patent of invention of Patent No. 201110001511.1 Disclose a kind of test dress of permeability coefficient of rainwater garden filling, this patent includes test device and the method for dependence test, Can be good at testing different gradation, differing texture, the permeability parameters of the filler of different buried depth.Additionally, it is Wang Shufen, Yang Le, white Big haze is in " technology builds analysis with artistic perfect unity Rain Garden " (classical Chinese garden, 2009,6), Xiang Lu, Li Jun Very, Kuang Nuo " analysis of Rain Garden method for designing " (water supply and drainage, 2008,06), Zeng Zhongzhong, literary composition love are in " parsing Portland rain Spray garden " (Central China is built, 2007,25), Hou Kelong, Qin Hua, Yang Lili etc. are in " analysis of residential area Rain Garden method of construction " Its development of Rain Garden, successful case analysis, Landscape Application and setting all has been spoken of in (Agriculture of Anhui science, 2011,39) The meter aspect such as Key Points Discussion, but be all confined on the qualitative description of Rain Garden and its suggestion of developing at home.Above-mentioned patent All do not relate to concrete grammar and the structural parameters that the internal Rain Garden in community in urban areas greenery patches builds with document.
Content of the invention
In view of the drawbacks described above of prior art, the technical problem to be solved is to provide one kind can reduce fall Rain runoff peak value, purify water, recharge of groundwater, slow down municipal drainage pressure, and improving miniclimate, the livable degree in lifting city The functional type Rain Garden being applied within communities in Shanghai greenery patches.
For achieving the above object, the invention provides a kind of functional type rainwater being applied within communities in Shanghai greenery patches Garden, described functional type Rain Garden is located in community greenery patches, the structure of described functional type Rain Garden include pretreatment facility, Aquifer, infiltration facility and overfall facility, wherein, described pretreatment facility includes annular side slope and gravel, described annular side slope Positioned at the periphery of described functional type Rain Garden, described clod cover is in described annular side slope;Described aquifer is described ring Shape side slope encloses constituted space with the bottom level of described functional type Rain Garden;Described infiltration facility is located at described function The bottom of type Rain Garden;Described overfall facility includes running through the overflow pipe of the thickness direction of described aquifer and is located at described work( The relief sewer of the bottom of energy type Rain Garden, described overflow pipe is connected with described relief sewer.
Further, it is disposed with cover layer, plantation layer, transition zone, packing layer along the thickness direction of described aquifer And drainage blanket, described drainage blanket is positioned at the bottom of described functional type Rain Garden.
Further, described cover layer is formed by microlith laying, and the thickness of described cover layer is 5cm, the grain of described microlith Footpath is 1~2cm.
Further, described plantation layer includes formula soil and plants the vegetation in described formula soil, described formula soil It is uniformly mixed with 40% middle sand by 60% Chinese garden planting soil, the thickness of described formula soil is 25~50cm;Described plant By perennial herb or shrub for having moisture-proof and drought-enduring performance, the height of described vegetation is 25~75cm.
Further, described transition zone is formed by the laying of middle sand, and the thickness of described transition zone is 5~10cm, described middle sand Particle diameter be 0.35~0.5mm.
Further, described filler layer is formed by building block brick laying, and the thickness of described filler layer is 25~35cm, described block The particle diameter of block brick is 3~5cm.
Further, described infiltration facility is made up of soakaway trench and infiltration drain pipe;Described soakaway trench is located at described draining The bottom of layer, the caliber of described soakaway trench is 12~18cm, and the outer wrap of described soakaway trench has 1~2 layer of geotextiles, and with carefully Rope tightens;Described soakaway trench connects with described infiltration drain pipe.
Further, described infiltration drain pipe have 1~3% the gradient, higher one end of described infiltration drain pipe with Described soakaway trench connection, relatively low one end is connected with neighbouring branch drain or catch-basin.
Further, described overflow pipe has overfall, and described overfall is provided with the honeybee that pore size is 1~2cm Socket type baffle plate, described honeycomb type baffle plate exceeds described aquifer 12~17cm, less than the described community greenery patches 3cm of periphery, described The caliber of overflow pipe is 12~17cm.
Further, described relief sewer has 1~3% gradient, higher one end of described relief sewer with Described overflow pipe connection, relatively low one end is connected with neighbouring branch drain or catch-basin.
Further, the area of described functional type Rain Garden is 10~40m2, length-width ratio is 1.5~2:1, structural thickness For 105~160cm.
Further, described annular side slope is located at the junction of described functional type Rain Garden and described community greenery patches, institute The gradient stating 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 compared to described community greenery patches to recessed 15~20cm.
The functional type Rain Garden being applied within communities in Shanghai greenery patches of the present invention can reduce rainfall runoff peak Value, purifies water, and recharge of groundwater slows down municipal drainage pressure, and improves miniclimate, the livable degree in lifting city.
Technique effect below with reference to design, concrete structure and generation to the present invention for the accompanying drawing is described further, with It is fully understood from the purpose of the present invention, feature and effect.
Brief description
Fig. 1 is the functional type Rain Garden being applied within communities in Shanghai greenery patches of presently preferred embodiments of the present invention Theory structure sectional drawing;
Fig. 2 is the functional type Rain Garden being applied within communities in Shanghai greenery patches of presently preferred embodiments of the present invention Theory structure plane graph;
Fig. 3 is that the theory structure of the functional type Rain Garden being applied within communities in Shanghai greenery patches of embodiment 1 breaks Face figure;
Fig. 4 is that the theory structure of the functional type Rain Garden being applied within communities in Shanghai greenery patches of embodiment 1 is put down Face figure;
Fig. 5 is that the theory structure of the functional type Rain Garden being applied within communities in Shanghai greenery patches of embodiment 2 breaks Face figure;
Fig. 6 is that the theory structure of the functional type Rain Garden being applied within communities in Shanghai greenery patches of embodiment 2 is put down Face figure.
Specific embodiment
As shown in Fig. 1~2, presently preferred embodiments of the present invention provides a kind of being applied within communities in Shanghai greenery patches Functional type Rain Garden 1, this functional type Rain Garden 1 is located at the inside in community greenery patches 14, and area is 10~40m2, length-width ratio is 1.5~2:1, structural thickness is 105~160cm, and its structure includes pretreatment facility 2, aquifer 3, infiltration facility 9 and overflow and sets Apply.Arrow 18 in Fig. 1 and Fig. 2 indicates the flow direction of rainfall runoff.
Wherein, pretreatment facility 2 includes annular side slope and covers the gravel in annular side slope, and annular side slope is located at work( Energy type Rain Garden 1 and the junction in community greenery patches 14, the gradient of annular side slope is 30~35 °, and width is 43~67cm, gravel Thickness be 8~12cm, particle diameter be 5~8cm.
Aquifer 3 encloses constituted space by the bottom level of annular side slope and functional type Rain Garden, aquifer 3 Bottom is compared to community greenery patches to recessed 15~20cm.
Thickness direction along aquifer 3 is disposed with cover layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8, drainage blanket 8 is located at the bottom of functional type Rain Garden 1.Cover layer 4 is formed by microlith laying, and the thickness of cover layer 4 is 5cm, The particle diameter of microlith is 1~2cm.Plantation layer 5 includes formula soil and plants the vegetation 11 in formula soil, and formula soil is by 60% Native and 40% the middle sand of Chinese garden planting is uniformly mixed, and the thickness of formula soil is 25~50cm;Vegetation 11 be have moisture-proof and The perennial herb of drought-enduring performance or shrub, the height of vegetation 11 is 25~75cm.Transition zone 6 is formed by the laying of middle sand, transition The thickness of layer 6 is 5~10cm, and the particle diameter of middle sand is 0.35~0.5mm.Packing layer 7 is formed by building block brick laying, packing layer 7 Thickness is 25~35cm, and the particle diameter of building block brick is 3~5cm.
Infiltration facility 9 is located at the bottom of drainage blanket 8, is made up of soakaway trench 15 and infiltration drain pipe 12.The pipe of soakaway trench 15 Footpath is 12~18cm, and the outer wrap of soakaway trench 15 has 1~2 layer of geotextiles, and is tightened with cord.Infiltration drain pipe 12 has 1 ~3% gradient, higher one end of infiltration drain pipe 12 connects with soakaway trench 15, relatively low one end and neighbouring branch drain 16 or catch-basin 17 connect.
Overfall facility includes running through the overflow pipe 19 of the thickness direction of aquifer and is located at functional type Rain Garden 1 bottom Relief sewer 13.Overflow pipe 19 has overfall 10, and overfall 10 is provided with the honeycomb type that pore size is 1~2cm Baffle plate 20, honeycomb type baffle plate 20 exceeds 12~17cm than aquifer 3,3cm lower than the community greenery patches 14 of periphery, the pipe of overflow pipe 19 Footpath is 12~18cm.Relief sewer 13 has 1~3% gradient, higher one end of relief sewer 13 and overflow pipe 19 Connection, relatively low one end is connected with neighbouring branch drain 16 or catch-basin 17.
The work of the functional type Rain Garden being applied within communities in Shanghai greenery patches of presently preferred embodiments of the present invention Principle is as follows:
(1), when there is rainfall, the rainfall runoff that community greenery patches 14 is converged is due to action of gravity remittance functional type Rain Garden 1 Interior, after the buffering of pretreatment facility 2 and preliminary filtration, enter aquifer 3, by the overground part of the vegetation 11 in aquifer 3 After point carrying out retardance and preliminary purification, ooze under most of rainfall runoff, under the water body that oozes sequentially pass through cover layer 4, plantation layer 5, Transition zone 6, packing layer 7 and drainage blanket 8, rainfall runoff is handed over through the precipitation of said structure layer, absorption, ion in infitration process Change, denitrogenation, biomembrane oxidation and plant root to the effect such as absorption of nitrogen phosphorus after, reach reduction runoff pollution and abatement rainfall The purpose of runoff.
(2) when rainfall is less than 29.9mm/12h, rainfall runoff imports in functional type Rain Garden 1, the rainfall of convergence Runoff in structure sheaf, is flowed through cover layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8 successively, successively delays by defaulted After oozing under slow, for supplementing the soil moisture in the community greenery patches 14 of periphery, the runoff oozing under continuation, by recharge of groundwater, realizes fall Whole absorption cleanings of rain runoff.
(3) when rainfall is 30~139.9mm/12h, rainfall runoff imports in functional type Rain Garden 1, the fall of convergence Rain runoff, through Rain Garden structure sheaf, flows through cover layer 4, plantation layer 5, transition zone 6, packing layer 7 and drainage blanket 8 successively, After oozing under successively slow, the water body part through purifying is used for supplementing Soil Surrounding moisture and subsoil water, oozes under having little time The water body of another part enters municipal drainage pipe network through infiltration facility, can cut down 70~80% run-off, remove 70~ 90% overall contamination.
(4) when rainfall is more than 140mm/12h, the higher initial rainfall runoff of pollutant levels is through functional type rainwater The retention in garden 1, filtration, purify after, more than 70% overall contamination can be removed, delay flood peak 40~60 minutes simultaneously; When lower infiltration rate degree in Rain Garden system for the rainfall runoff is less than the inflow velocity of flow mode, system can gradually hydrops To overfall 10 height, rainfall runoff rapidly can enter overflow pipe 19 by overfall 10, then be immediately discharged to municipal drain Road, and in functional type Rain Garden 1, the hydrops of not up to overfall 10 height ooze under still continuing, and extenuate municipal administration to a certain extent Discharge pressure, reduces periphery hydrops.
Embodiment 1:
Setting functional type rainwater flower in greenery patches between the show house residence of Suzhou greenery patches Xiangcheng District villa quarter landscape demonstration area south Garden 21, in order to collect the runoff producing in greenery patches 22.As shown in Figures 3 and 4, the area of this functional type Rain Garden 21 is 12m2, It is shaped as kidney shape, bottom lengths are 4.8m, width is 2.5m, structural thickness is 105cm, the arrow 40 in Fig. 3 and Fig. 4 gives The flow direction of rainfall runoff.
The structure of functional type Rain Garden 21 includes pretreatment facility 23, aquifer 24, infiltration facility 25 and overfall facility.
Wherein, pretreatment facility 23 includes annular side slope and covers the gravel in annular side slope, and annular side slope is located at Functional type Rain Garden 21 and the junction in greenery patches 22, the gradient of annular side slope is 35 °, and width is 43cm, and the thickness of gravel is 8cm, particle diameter is 5cm.
Aquifer 24 encloses constituted space, aquifer by the bottom level of annular side slope and functional type Rain Garden 21 24 bottom is compared to greenery patches 22 to recessed 15cm.
Thickness direction along aquifer 24 is disposed with cover layer 26, plantation layer 27, transition zone 28, packing layer 29 and row Water layer 30, drainage blanket 30 is located at the bottom of functional type Rain Garden 21.Cover layer 26 is formed by microlith laying, the thickness of cover layer 26 Spend for 5cm, the particle diameter of microlith is 1cm.Plantation layer 27 include formula soil and plant the vegetation 31 in formula soil, formula soil by 60% Chinese garden planting soil is uniformly mixed with 40% middle sand, and the thickness of formula soil is 25cm;Vegetation 31 is height 30cm Short Radix Ophiopogonis.By particle diameter, the middle sand laying for 0.5mm forms transition zone 28, and its thickness is 5cm.Packing layer 29 is by particle diameter 3cm's Building block brick laying forms, and the thickness of packing layer 29 is 25cm.
Infiltration facility 25 is located at the bottom of drainage blanket 50, is made up of soakaway trench 32 and infiltration drain pipe 33.Soakaway trench 32 Caliber is 12cm, and the outer wrap of soakaway trench 32 has 1 layer of geotextiles, and is tightened with cord.Infiltration drain pipe 33 has 3% slope Degree, higher one end of infiltration drain pipe 33 connects with soakaway trench 32, relatively low one end and neighbouring branch drain 34 or rainwater Well 35 connects.
Overfall facility includes running through the overflow pipe 36 of the thickness direction of aquifer 24 and is located at functional type Rain Garden 21 The relief sewer 37 of bottom.Overflow pipe 36 has overfall 38, and overfall 38 is provided with the honeycomb type that pore size is 1cm Baffle plate 39, honeycomb type baffle plate 39 exceeds 12cm than aquifer 24,3cm lower than the greenery patches 22 of periphery, and the caliber of overflow pipe 36 is 12cm.Relief sewer 37 has 3% gradient, and higher one end of relief sewer 37 is connected with overflow pipe 36, relatively low One end is connected with neighbouring branch drain 34 or catch-basin 35.
According to above design of Structural Parameters, this Rain Garden every year can (12h effectively under purified treatment large, medium and small raininess degree Rainfall be less than 29.9mm) rainfall runoff about 80m3, process (12h rainfall is more than 30mm) pollutant levels under storm intensity Highest initial rainfall runoff about 48m3, 90% is about to the reduction rate of tss, 60% is about to the reduction rate of cod, tp is cut Lapse rate is about 80%, is about 65% to the reduction rate of tn.Meanwhile, this Rain Garden is that water for irrigation is saved about in this piece greenery patches every year For 20 tons.
Embodiment 2:
Functional type Rain Garden 41 is set in greenery patches between the sheng, a reed pipe wind instrument sunshine cell high residential building residence of Shanghai Baoshan greenery patches marine site, in order to Collect the runoff producing in greenery patches 42.As it can be seen in figures 5 and 6, the area of this functional type Rain Garden 41 is 39m2, it is shaped as kidney Shape, bottom lengths are 8.5m, and width is 4.6m, and structural thickness is 160cm, and the arrow 60 in Fig. 5 and Fig. 6 gives rainfall runoff Flow direction.
The structure of functional type Rain Garden 41 includes pretreatment facility 43, aquifer 44, infiltration facility 45 and overfall facility.
Wherein, pretreatment facility 43 includes annular side slope and covers the gravel in annular side slope, and annular side slope is located at Functional type Rain Garden and the junction in greenery patches 42, the gradient of annular side slope is 30 °, and width is 67cm, and the thickness of gravel is 12cm, particle diameter is 8cm.
Aquifer 44 encloses constituted space, aquifer by the bottom level of annular side slope and functional type Rain Garden 41 44 bottom is compared to greenery patches 42 to recessed 20cm.
Thickness direction along aquifer 44 is disposed with cover layer 46, plantation layer 47, transition zone 48, packing layer 49 and row Water layer 50, drainage blanket 50 is located at the bottom of functional type Rain Garden 41.Cover layer 46 is formed by microlith laying, the thickness of cover layer 46 Spend for 5cm, the particle diameter of microlith is 1cm.Plantation layer 47 include formula soil and plant the vegetation 51 in formula soil, formula soil by 60% Chinese garden planting soil is uniformly mixed with 40% middle sand, and the thickness of formula soil is 50cm;Vegetation 51 is height 65cm Lobule Fructus Gardeniae.By particle diameter, the middle sand laying for 0.5mm forms transition zone 48, and its thickness is 10cm.Packing layer 49 is by particle diameter 3cm Building block brick laying form, the thickness of packing layer 49 is 35cm.
Infiltration facility 45 is located at the bottom of drainage blanket 50, is made up of soakaway trench 52 and infiltration drain pipe 53.Soakaway trench 52 Caliber is 18cm, and the outer wrap of soakaway trench 52 has 2 layers of geotextiles, and is tightened with cord.Infiltration drain pipe 53 has 1% slope Degree, higher one end of infiltration drain pipe 53 connects with soakaway trench 52, relatively low one end and neighbouring branch drain 54 or rainwater Well 55 connects.
Overfall facility includes running through the overflow pipe 56 of the thickness direction of aquifer 44 and is located at functional type Rain Garden 41 The relief sewer 57 of bottom.Overflow pipe 56 has overfall 58, and overfall 58 is provided with the honeycomb type that pore size is 2cm Baffle plate 59, honeycomb type baffle plate 59 exceeds 17cm than aquifer 44,3cm lower than the greenery patches of periphery, and the caliber of overflow pipe 56 is 18cm. Relief sewer 57 has 1% gradient, and higher one end of relief sewer 57 is connected with overflow pipe 56, relatively low one end with Neighbouring branch drain 54 or catch-basin 55 connect.
According to above design of Structural Parameters, this Rain Garden every year can (12h effectively under purified treatment large, medium and small raininess degree Rainfall be less than 29.9mm) rainfall runoff about 310m3, process (12h rainfall is more than 30mm) pollutant under storm intensity dense Degree highest initial rainfall runoff about 190m3, 90% is about to the reduction rate of tss, 80% is about to the reduction rate of cod, to tp Reduction rate be about 90%, 75% is about to the reduction rate of tn.Meanwhile, this Rain Garden is that pouring use is saved in this piece greenery patches every year Water is about 78 tons.
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art is no Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technology in the art It is available that personnel pass through logical analysis, reasoning, or a limited experiment under this invention's idea on the basis of existing technology Technical scheme, all should be in the protection domain being defined in the patent claims.

Claims (5)

1. a kind of functional type Rain Garden being applied within communities in Shanghai greenery patches is it is characterised in that described functional type rain Spray garden is located in community greenery patches, the structure of described functional type Rain Garden include pretreatment facility, aquifer, infiltration facility and Overfall facility, wherein, described pretreatment facility includes annular side slope and gravel, and described annular side slope is located at described functional type rainwater The periphery in garden, described clod cover is in described annular side slope;The gradient of described annular side slope is 30~35 °, and width is 43 ~67cm;The thickness of described gravel is 8~12cm, and particle diameter is 5~8cm;Described aquifer is described annular side slope and described work( The bottom level of energy type Rain Garden encloses constituted space;The bottom of described aquifer is downward compared to described community greenery patches Recessed 15~20cm;Described infiltration facility is located at the bottom of described functional type Rain Garden;Described overfall facility includes running through described The overflow pipe of the thickness direction of aquifer and the relief sewer of the bottom positioned at described functional type Rain Garden, described overflow pipe Connect with described relief sewer;Thickness direction along described aquifer is disposed with cover layer, plantation layer, transition Layer, packing layer and drainage blanket, described drainage blanket is located at the bottom of described functional type Rain Garden;Described cover layer is laid by microlith Form, the thickness of described cover layer is 5cm, the particle diameter of described microlith is 1~2cm;Described plantation layer includes formula soil and kind Plant the vegetation in described formula soil, described formula soil is uniformly mixed with 40% middle sand by 60% Chinese garden planting soil, The thickness of described formula soil is 25~50cm;Described vegetation is perennial herb or the shrub with moisture-proof and drought-enduring performance, institute The height stating vegetation is 25~75cm;Described transition zone is formed by the laying of middle sand, and the thickness of described transition zone is 5~10cm, institute The particle diameter stating middle sand is 0.35~0.5mm;Described filler layer is formed by building block brick laying, and the thickness of described filler layer is 25~ 35cm, the particle diameter of described building block brick is 3~5cm;The area of described functional type Rain Garden is 10~40m2, length-width ratio is 1.5 ~2:1, structural thickness is 105~160cm.
2. functional type Rain Garden as claimed in claim 1 is it is characterised in that described infiltration facility is by soakaway trench and infiltration row Water pipe is constituted;Described soakaway trench is located at the bottom of described drainage blanket, and the caliber of described soakaway trench is 12~18cm, described soakaway trench Outer wrap have 1~2 layer of geotextiles, and tightened with cord;Described soakaway trench connects with described infiltration drain pipe.
3. functional type Rain Garden as claimed in claim 2 is it is characterised in that described infiltration drain pipe has 1~3% slope Degree, higher one end of described infiltration drain pipe connects with described soakaway trench, relatively low one end and neighbouring branch drain or rain Well connects.
4. functional type Rain Garden as claimed in claim 1 is it is characterised in that described overflow pipe has overfall, described excessive The honeycomb type baffle plate that pore size is 1~2cm is provided with head piece, described honeycomb type baffle plate exceed described aquifer 12~ 17cm, less than the described community greenery patches 3cm of periphery, the caliber of described overflow pipe is 12~17cm.
5. functional type Rain Garden as claimed in claim 1 is it is characterised in that described relief sewer has 1~3% slope Degree, higher one end of described relief sewer connects with described overflow pipe, relatively low one end and neighbouring branch drain or rain Well connects.
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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CN102359172B (en) * 2011-08-22 2013-07-10 重庆大学 City life residential area rainwater shunting, collecting and disposal system
CN202380558U (en) * 2011-12-27 2012-08-15 北京建筑工程学院 Anti-water-logging system
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CN103306360B (en) * 2013-06-14 2015-01-28 天津大学 Multidimensional ecological drainage system for intercepting and controlling separate system rainwater pollutants into river
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