CN207210075U - A kind of Rain Garden system for slowing down substrate clogging - Google Patents
A kind of Rain Garden system for slowing down substrate clogging Download PDFInfo
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- CN207210075U CN207210075U CN201720752875.6U CN201720752875U CN207210075U CN 207210075 U CN207210075 U CN 207210075U CN 201720752875 U CN201720752875 U CN 201720752875U CN 207210075 U CN207210075 U CN 207210075U
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- rain garden
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Abstract
The utility model discloses a kind of Rain Garden system for slowing down substrate clogging, it is composed in series by pretreatment unit and enhanced type Rain Garden.Described pretreatment unit is a cross flow pond (1), be from top to bottom aquitard, planting soil layer and geotextile layer, aquitard be provided with water plant (3) and surface filter material layer (11).Suspension in early-stage rainwater can be reduced effectively behind cross flow pond；Enhanced type Rain Garden (2) is respectively from top to bottom aquitard, planting soil layer, packing layer, drainage blanket and geotextile layer, provided with water plant (3), reoxygenation breather pipe (21), overflow well (22).Packing layer is using double-deck classification filler, reoxygenation ventilation reinforcement filler layer oxygen content.Cross flow pond (1) technique is simple in the system, and enhanced type Rain Garden (2) enhancements are simple to operation, can effectively slow down the blocking process of rainwater garden filling by pretreatment and enhancements, ensures the permanently effective operation of Rain Garden.
Description
【Technical field】
It the utility model is related to municipal field of environment engineering, more particularly to a kind of Rain Garden system.
【Background technology】
Rain Garden, also known as biological delaying basin, because it has, manageability, landscape are good, cost is low, ecological good etc. excellent
Gesture, widely promoted and used in the practice of the storm water man- agements such as the U.S., Germany.Building the national policy in " sponge city "
Under stimulation, Rain Garden is paid attention to rapidly as " sponge cell body ".
The experimental study of Rain Garden dirt-removing power shows that it goes processing efficient stable the most, its mechanism of action to TSS
The predominantly filtering retention of soil and packing medium, and it is natural effect common in sewage filter system to block.First, enter water
In suspension can assemble in stromal surface and space when passing through matrix so that matrix effective porosity persistently reduces；Second,
With the reduction of voidage, matrix regional area can be caused to form anaerobic environment, its reduced level is higher, born of the same parents caused by microorganism
Outer polymer is more poly- more in matrix space, accelerates the process of substrate clogging.
At present, the research on Rain Garden blockage problem is still less, first, the one kind of Rain Garden as rainwater management
Facility, principal concern are its control to rainfall runoff, and different from sewage treatment facilities such as artificial swamps, more pay close attention to it
Pollutant removal；Two be due to that problem just gradually highlights blockage problem typically after the long period is run, and Rain Garden exists
Studies in China entered fast hair period of expansion from 2014 under the guiding of " sponge city " policy, but engineering practice at present still compared with
It is few.According to the he result of investigation of early-stage rainwater water quality, SS concentration is higher in early-stage rainwater, to ensure that Rain Garden is permanently effective
Operation, reasonable effective measures need to be taken to prevent and slow down the blocking of rainwater garden filling matrix.
【Utility model content】
Technical problem underlying to be solved in the utility model is to provide a kind of Rain Garden system for slowing down substrate clogging.
The utility model uses following technical schemes：A kind of Rain Garden system for slowing down substrate clogging, by pre-treatment
Unit and enhanced type Rain Garden are composed in series；
The pretreatment unit is a cross flow pond 1, and the recessed depth in cross flow pond is 10cm~20cm, is from top to bottom backwater
Layer, planting soil layer and geotextile layer, wherein aquitard are provided with water plant 3 and surface filter material layer 11；
The enhanced type Rain Garden 2 is respectively aquitard, planting soil layer, packing layer, drainage blanket and geotechnique from top to bottom
Layer of cloth, and it is provided with breather pipe 21, overflow well 22, punched collection pipe 23 and rainwater connecting tube 24.
Further, the gravel diafiltration ridge 4 is provided between pretreatment unit and enhanced type Rain Garden, highly less than water inlet height
Degree.
Further, pretreatment unit cross flow pool surface laying gravel filling.
Further, dispersed placement reoxygenation breather pipe in enhanced type Rain Garden.
Further, enhanced type rainwater garden filling layer uses double-deck filler, and upper strata filler uses porosity larger, high
The fillers such as water-based zeolite；Lower floor is using porosity, the filler such as fine sand of low permeability.
Further, enhanced type Rain Garden is provided with overflow well (containing overfall)；Perforated catchment pipe is arranged at gravel draining
Layer, front end set pipe plug, and rear end is discharged into overflow well.
By using easy pretreatment unit, pollutant, especially SS are tentatively removed, mitigates subsequent reinforced type rainwater flower
The pollutional load in garden；Reoxygenation breather pipe is uniformly laid in enhanced type Rain Garden, is increased in enhanced type rainwater garden filling layer
Oxygen supply, avoid the formation of anaerobic environment；Using two layers upper coarse and lower fine of grade filler, upper strata filler is avoided quickly to block, the above
The pretreatment and Rain Garden enhancements that system is taken according to filler plugging reason specific aim, construction is simple are convenient.
【Brief description of the drawings】
Fig. 1 is floor map of the present utility model.
Fig. 2 is cross-sectional view of the present utility model.
Shown in figure：1-cross flow pond, 11-top layer filler, 2-enhanced type Rain Garden, 3-water plant, 4-gravel
It is percolated the ridge, 21-breather pipe, 22-overflow well, 23-perforated catchment pipe, 24-rainwater connecting tube, 25-spout hole.
【Embodiment】
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
It is specific embodiment of the present utility model as shown in Figure 1, 2, a kind of Rain Garden system for slowing down substrate clogging,
It is composed in series by pretreatment unit cross flow pond 1 and enhanced type Rain Garden 2.
The 1 recessed depth of cross flow pond is 10cm~20cm, is followed successively by aquitard, planting soil layer and geotextiles from top to bottom
Layer.Planting aquatic plants 3 in cross flow pond 1, surface interspersion gravel formed surface filter material layer 11, average thickness be 5cm~
10cm, and lay geotextiles in planting soil and original soil interlayer.
The purpose that the pretreatment unit cross flow pond 1 is set is root system and surface gravel by setting water plant 3
Suspension and organic pollution in the effectively catching of filtrate 11 and absorption early-stage rainwater, reduce subsequent reinforced type Rain Garden and suspend
The pollutional load of thing, and then slow down the blocking of filler, extend the service life of Rain Garden.In addition, cross flow pond passes through interspersion gravel
Stone forms surface filter material layer, and it is easy to change.
It is respectively aquitard, planting soil layer, packing layer, drainage blanket and soil from top to bottom in the enhanced type Rain Garden 2
Work layer of cloth, and water plant 3, breather pipe 21, overflow well 22 and punched collection pipe 23 are provided with, wherein the infiltration coefficient of planting soil should
More than 1 × 10-6During m/s, soil removal and replacement should be carried out when being unsatisfactory for requiring；Effectively to slow down the blocking of filler, filler is matched somebody with somebody using hierarchical
Set, upper strata is using fillers, highly 50%~70% for packing layer such as the larger, zeolites of high water-permeability of porosity.Lower floor adopts
With porosity, the filler, highly 30%~50% for bed stuffing height such as fine sand of low permeability；The top of breather pipe 21 is high
Go out 5cm at the top of overfall, lower end to packing layer bottom, breather pipe overflow pipe higher slice is provided with multiple perforates；Overflow well 22 is set
Overfall 25 is set at the top of enhanced type Rain Garden lowest part, overflow well, and the top of overfall 25 is higher than aquitard 10cm；Perforation
Collecting pipe 23 is arranged in gravel drainage blanket, and enhanced type Rain Garden perforated catchment pipe is arranged at gravel drainage blanket, and front end sets pipe
Stifled, rear end access overflow well is simultaneously discharged into Stormwater Drainage System.
The enhancements one of the enhanced type Rain Garden are that porosity is upper coarse and lower fine, avoids using double-deck classification filler
Upper strata filler quickly blocks, and slows down the process of filler blocking；Second, setting up breather pipe, breather pipe vertically runs through packing layer, increase
The reoxygenation demand of packing layer bottom depths in enhanced type Rain Garden, avoids forming anaerobic condition in filler, while also reinforcing has
The removal effect of machine thing, ammonia nitrogen.
Further to reduce enhanced type Rain Garden water inlet concentration of suspension and uniformly water inlet, cross flow pond 1 and enhanced type rain
The trapezoidal cross-section gravel diafiltration ridge 4 is set in spray garden (2), for retaining the suspension of plant base of leaf etc. in cross flow pond.
The utility model patent purpose be to provide it is a kind of have with simple pretreatment unit, be oxygenated by strengthening rainwater
Ability and filler grading etc. measure maintain the long-term efficient stable of Rain Garden to slow down the process of the blocking of Rain Garden
Operation.
Above-described is only preferred embodiment of the present utility model, it is noted that for the ordinary skill of this area
For personnel, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.
Claims (3)
1. a kind of Rain Garden system for slowing down substrate clogging, is composed in series by pretreatment unit and enhanced type Rain Garden；
The pretreatment unit is cross flow pond (1), and cross flow pond (1) recessed depth is 10cm~20cm, be from top to bottom aquitard,
Planting soil layer and geotextile layer, wherein aquitard are provided with water plant (3) and surface filter material layer (11), planting soil layer bottom and original
Waterproof geotextiles are provided between soil layer；
The enhanced type Rain Garden (2) is respectively aquitard, planting soil layer, packing layer, drainage blanket and geotextiles from top to bottom
Layer；Water plant (3), breather pipe (21), overflow well (22), punched collection pipe (23), rainwater are provided with enhanced type Rain Garden
Connecting tube (24) and overfall (25).
2. a kind of Rain Garden system for slowing down substrate clogging according to claim 1, the pretreatment unit cross flow pond
(1) the gravel diafiltration ridge (4) is provided between enhanced type Rain Garden (2), retains plant stem-leaf suspension in cross flow pond.
3. a kind of Rain Garden system for slowing down substrate clogging according to claim 1, described enhanced type Rain Garden,
It is characterized in that one is upper coarse and lower fine using double-deck classification filler, porosity；Second, setting up breather pipe, breather pipe, which vertically runs through, to be filled out
The bed of material, the reoxygenation demand of packing layer bottom depths, avoids forming anaerobic condition in filler in enhanced type Rain Garden.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720752875.6U CN207210075U (en) | 2017-06-27 | 2017-06-27 | A kind of Rain Garden system for slowing down substrate clogging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720752875.6U CN207210075U (en) | 2017-06-27 | 2017-06-27 | A kind of Rain Garden system for slowing down substrate clogging |
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| Publication Number | Publication Date |
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| CN207210075U true CN207210075U (en) | 2018-04-10 |
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| CN201720752875.6U Active CN207210075U (en) | 2017-06-27 | 2017-06-27 | A kind of Rain Garden system for slowing down substrate clogging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745951A (en) * | 2019-11-18 | 2020-02-04 | 南京工业大学 | Biological detention pond with dephosphorization and deodorization functions |
-
2017
- 2017-06-27 CN CN201720752875.6U patent/CN207210075U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745951A (en) * | 2019-11-18 | 2020-02-04 | 南京工业大学 | Biological detention pond with dephosphorization and deodorization functions |
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