CN102976557B - Underground percolation and purification simulating device of urban natural type bank belt rainfall radial flow - Google Patents
Underground percolation and purification simulating device of urban natural type bank belt rainfall radial flow Download PDFInfo
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- CN102976557B CN102976557B CN201210514442.9A CN201210514442A CN102976557B CN 102976557 B CN102976557 B CN 102976557B CN 201210514442 A CN201210514442 A CN 201210514442A CN 102976557 B CN102976557 B CN 102976557B
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Abstract
The invention discloses an underground percolation and purification simulating device of an urban natural type bank belt rainfall radial flow, comprising a base and a main body part placed on the base, wherein the main body part comprises a surface radial flow collecting tank, a water distribution anti-sputtering plate, a water distribution suit, surface vegetation and a growth soil layer of the surface vegetation, a soil and coal dreg mixing layer in a ratio of 5: 1, a sawdust layer, a zeolite and medical stone filtering material layer in a ratio of 3: 7, a soil and sawdust mixing layer in a ratio of 5: 1, a raw soil layer, and medium percolate sampling openings between each two layers of all the layers; and the base comprises a steel bar cement base and bottom-layer percolate collecting tanks arranged inside the steel bar cement base. The device disclosed by the invention is easy to realize and low in cost, and realizes good purification effect.
Description
Technical field
The construction process that the present invention relates to a kind of Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device, belongs to urban water-body ecological purification field of engineering technology.
Background technology
At present, rainfall runoff pollution of area source has become the important source of pollution that urban water-body pollutes, according to preresearch estimates, city rainwater runoff pollution accounts for the ratio of water pollution load, account for 10% left and right in Beijing and Shanghai at present, to 2010, Urban Rainwater Runoff Pollution load proportion will rise in Beijing more than 12%, and Shanghai will rise to 20% left and right.Current, the improvement of Urban Rain pollution of area source is focused mostly in the both sides of community and road, and be applied to farmland for the purification in source, Riparian Zone opposite more, therefore, at urban riverbank band, the improvement of urban rainwater pollution of area source is had a extensive future.
Summary of the invention
City inland river bank band is that urban rainfall runoff enters last one barrier before river course, but for the needs of waterpower functional design and urban construction, urban river replaces natural earth and vegetation with the bank slope of a large amount of Reinforced Concrete Retaining Walls or cement laid stone masonry, and Riparian Zone is very narrow, the gradient is excessive, vegetation pattern is single, and ecological environment function reduces.Urban Natural type bank band of the present invention by Urban Natural type bank band is carried out to ecology transformation, is not destroying strong its environmental functional of increase under its original social function prerequisite to rainfall runoff subsurface infiltration purification system; This system does not need large-area storage area simultaneously, does not need outer power to drive it yet, only relies on rainfall runoff flow pattern of following seepage flow and horizontal flow in model to purify it; The recessed portion that model carries can significantly increase runoff hydraulic detention time and strengthen runoff under ooze; In addition, by the monitoring to lower seepage paths flow point layer effluent quality, can grasp at any time the purge cases of each layer of medium, be conducive to the maintenance service of whole system performance.
Be suitable for for providing the technical scheme that under different hydraulic load conditions, bank band filtration system adopts, comprise the configuration of bank band filtration system, simulation, the filling ratio of filtration system and the simulation of method and the purification of different gradient model etc. of hydraulic load, the present invention proposes a kind of Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device, comprises base and is placed in the main part on base; Wherein, main part comprises: overland flow receiving tank, water distribution splasher, water distribution external member, from top to bottom the top layer vegetation that is arranged in order and soil for growth layer thereof, 5:1 soil cinder mixolimnion, sawdust layer, 3:7 zeolite medical stone filter material layer, 5:1 soil sawdust mixolimnion, former soil layer and every medium percolate thief hatch between two-layer in above-mentioned each layer; And base comprises reinforced concrete pedestal and is arranged at the bottom leachate collection groove in reinforced concrete pedestal.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, device further comprises multiple layered samplers, multiple layered samplers are arranged in main part, and multiple layered sampler is arranged at the different positions of above-below direction in main part; Wherein, each layered sampler has filter layer and reservoir bed, separate, and each layered sampler is communicated with corresponding medium percolate thief hatch by communicating pipe in the middle of filter layer and reservoir bed with porous permeable plate.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, apparatus surface has recessed portion.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, the top layer of top layer vegetation and soil for growth layer thereof has 10cm thickness.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, 5:1 soil cinder mixolimnion by 10cm thickness, there is greater particle size granulometric composition.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, sawdust layer has 0.5cm thickness.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, 3:7 zeolite medical stone filter material layer has 30cm thickness; And 3:7 zeolite medical stone filter material layer 9 comprises zeolite and medical stone, and the volume ratio of the two is 3:7, wherein, the thinner medical stone of particle under, the thicker zeolite of particle is upper.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, 5:1 soil sawdust mixolimnion has 10cm thickness.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, former soil layer has the thickness of upstream 60cm, downstream 20cm.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, water distribution external member comprises flowrate control valve, simulates the scavenging process of dissimilar city bank band to rainfall runoff under Different Diameter stream load condition by adjust flux control valve.
The present invention has realized and has strengthened the resistance control ability of Urban Natural type bank band to urban rainfall runoff, and the present invention is mainly made up of overland flow water leg, layered sampler, splasher, water distribution external member, top layer vegetation and soil for growth layer thereof, soil cinder mixolimnion, sawdust layer, filter material layer, soil sawdust mixolimnion, former soil layer, bottom water leg and pedestal etc.Its main part is mainly made up of wide material sources, cheap filtrates such as cinder, sawdust, local soil, zeolite and medical stones.
When apparatus of the present invention operation, without any external impetus, the urban rainfall runoff of this system of flowing through, under the effect of gravity, forms overland flow and forms lower seepage paths stream through each dielectric structure layer successively along the gradient.Under field conditions (factors), apparatus of the present invention are to NH
4 +, TN, TP and COD
crthere is good removal effect.
The present invention, in conjunction with present Research both domestic and external, considers the actual demand of the different hydraulic load simulations of China's Riparian Zone, has developed and has been suitable for simulating bank band subsurface infiltration refining plant under the different hydraulic load conditions of different gradient.Its beneficial effect is: (1) provides and is applicable to diafiltration refining plant under different hydraulic load conditions, can simcity Riparian Zone different gradient and different rainfall runoff loading condiction under the scavenging process of filtration system to runoff; (2) in practical application, do not need additional any extra power, rely on action of gravity to complete the working process of whole system completely, it is simple in structure, cost is lower and easy to use, the effectively scavenging process of the actual bank band in simcity to rainfall runoff; (3) adopt filtration system to be detained with recessed portion the method combining, delayed the runoff yield of overland flow, increased infiltration rate.
Accompanying drawing explanation
The master that accompanying drawing 1 is Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device looks schematic diagram;
Fig. 2 (a) is stratified sampler front view and vertical view;
Fig. 2 (b) is the A-A sectional view of Fig. 2 (a).
Drawing reference numeral:
1 overland flow receiving tank; 2 medium percolate thief hatchs; 3 bottom leachate collection grooves; 4 water distribution splashers; 5 water distribution external members; 6 top layer vegetation and soil for growth layer thereof; 75:1 soil cinder mixolimnion; 8 sawdust layers; 93:7 zeolite medical stone filter material layer; 105:1 soil sawdust mixolimnion; 11 former soil layers; 3 bottom leachate collection grooves; 12 reinforced concrete pedestals; 13 filter layers; 14 porous permeable plates; 15 reservoir beds; 16 communicating pipe.
Embodiment
In conjunction with following embodiment, further describe the present invention.Specifically: according to preferred embodiment of the present invention, the present invention proposes a kind of Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device, comprise base and be placed in the main part on base; Wherein, main part comprises: the overland flow receiving tank 1, water distribution splasher 4, water distribution external member 5, top layer vegetation and the soil for growth layer 6 thereof that are arranged in order from top to bottom, 5:1 soil cinder mixolimnion 7, sawdust layer 8,3:7 zeolite medical stone filter material layer 9,5:1 soil sawdust mixolimnion 10, former soil layer 11 and every medium percolate thief hatch 2 between two-layer in above-mentioned each layer; And base comprises reinforced concrete pedestal 12 and is arranged at the bottom leachate collection groove 3 in reinforced concrete pedestal 12.
Further, according to Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device provided by the invention, device further comprises multiple layered samplers, multiple layered samplers are arranged in main part, and multiple layered sampler is arranged at the different positions of above-below direction in main part; Wherein, each layered sampler has filter layer 13 and reservoir bed 15, separate, and each layered sampler is communicated with corresponding medium percolate thief hatch 2 by communicating pipe 16 in the middle of filter layer 13 and reservoir bed 15 with porous permeable plate 14.
More specifically, as Figure of description 1, Figure of description 2(a) and Figure of description 2(b) as shown in, according to the present invention, the device of preferred embodiment has following structure:
(1) configuration of multimedium diafiltration purification system: this filtration system main part is uncovered rectangular parallelepiped synthetic glass groove, on main part outside surface, has overland flow receiving tank 1, water distribution splasher 4, water distribution external member 5, top layer vegetation and soil for growth layer 6 thereof, 5:1 soil cinder mixolimnion 7, sawdust layer 8,3:7 zeolite medical stone filter material layer 9,5:1 soil sawdust mixolimnion 10, former soil layer 11, and be arranged at the medium percolate thief hatch 2 between each layer.Further, whole main part is seated in bottom leachate collection groove 3 and (its structure as shown in Figure 1) above reinforced concrete pedestal 12.System body inside is also provided with some layered samplers according to different depths, and it is made up of filter layer 13 and reservoir bed 15, and separate with porous permeable plate 14 centre, by be connected with stratified sampling mouth communicating pipe 16 (its structure is as shown in Fig. 2 (a) and Fig. 2 (b)).
(2) simulation of hydraulic load: can control the flow velocity of its water outlet by the ball valve under meter and the return water pipe that are arranged on water end (W.E.) in water distribution external member 5, and then realize the simulation to different hydraulic loads;
(3) filling ratio and the method for system media: first lay former soil layer 11 in bottom of device, the lower end thickness of former soil layer 11 on water flow flow direction is that 20cm, upper end thickness are 50cm, the gradient is 5 °, and forms at 1/3 place, model upper end recessed that 20cm is dark, 20cm is wide; Then laying depth is similarly the 5:1 soil sawdust mixolimnion 10 of 10cm thereon, on it, be 3:7 zeolite and the medical stone filter material layer 9 of 30cm for thickness, zeolite and be the sawdust layer 8 of 0.5cm thickness above medical stone filter material layer, sawdust layer 8 is the 5:1 soil cinder mixolimnion 7 of 10cm thickness above, is the soil for growth layer that top layer vegetation and 10cm are thick on it.Each layer all with the consistent formation of former soil layer 11 recessed portion.Simulate as much as possible crude sedimentation environment for guaranteeing this system, layers of material all adopts substep completion method while filling, be every layer of dielectric material of each uniform filling, the stratified sampler of landfill last layer percolate, after the real deposition of becoming silted up of watering, then continue to fill last layer dielectric material, then bury the stratified sampler of last layer percolate underground, watering equally, it is real to become silted up, and goes round and begins again until reach filling thickness requirement; After filling, natural sediment can normally move after 15 days.When stratified sampler is buried underground, the upper edge of sampling thief filter layer is parallel with two layer medium boundary line, in filter layer, is quartz sand;
(4) enter the collocation method of water: extract river with submersible pump and enter water butt, then extract river in water butt with submersible pump and, to water distributor, in the middle of submersible pump and water distributor, enter the water yield with under meter and return line control.
In the present invention, water distribution external member 5 is a set of.
In the present invention, water distribution splasher 4 is a set of.
In the present invention, overland flow receiving tank 1 is one group.
In the present invention, layered sampler is eight covers.
In the present invention, bottom leachate collection groove 3 is two groups.
In experimentation, extract river with submersible pump and enter water butt, then extract river in water butt with submersible pump and, to water distributor, in the middle of submersible pump and water distributor, enter the water yield with under meter and return line control.Enter water and enter after model, under blend that side is oozed and form ponding at recessed portion, recessed portion charge for remittance is saturated to flow afterwards along model surface, forms overland flow, enter simultaneously water in model, form under seepage flow; Gather each layer of percolate and top layer runoff at each stratified sampler and top layer runoff receiving tank 1; In different waters, under concentration of nitrogen and phosphorus, model is to NH
4 +, TN, TP and COD
crremoval ability be respectively 1114.53,633.89,100.47 and 2220.84mgm
-2h
-1.
Above embodiment can find out, in the present invention, the master of Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device can the scavenging process of simcity nature bank band to rainfall runoff depending on schematic diagram, and have good removal effect.
The above embodiment of the present invention is not limitation of the present invention.Do not deviating under the spirit and scope of inventive concept, the variation that those skilled in the art can expect and advantage are all included in the present invention.
Claims (9)
1. a Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device, is characterized in that, comprises base and is placed in the main part on described base; Wherein, described main part comprises: overland flow receiving tank (1), water distribution splasher (4), water distribution external member (5), from top to bottom the top layer vegetation that is arranged in order and soil for growth layer (6) thereof, 5:1 soil cinder mixolimnion (7), sawdust layer (8), 3:7 zeolite medical stone filter material layer (9), 5:1 soil sawdust mixolimnion (10), former soil layer (11) and every medium percolate thief hatch (2) between two-layer in above-mentioned each layer; Wherein, described overland flow receiving tank (1), water distribution splasher (4), water distribution external member (5) is located on described main part outside surface; And described base comprises reinforcing bar water
Mud pedestal (12) and be arranged at the bottom leachate collection groove (3) in reinforced concrete pedestal (12);
Described apparatus surface has recessed portion; Described recessed portion is arranged on apart from 1/3 place, described device upper end, for 20cm is dark, 20cm is wide.
2. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device as claimed in claim 1, it is characterized in that, described device further comprises multiple layered samplers, described multiple layered sampler is arranged in described main part, and described multiple layered sampler is arranged at the different positions of above-below direction and each described layered sampler in described main part between each layer of dielectric material in described main part; Wherein, each described layered sampler has filter layer (13) and reservoir bed (15) from top to bottom, in the middle of described filter layer (13) and described reservoir bed (15), separate with porous permeable plate (14), described reservoir bed (15) was connected with communicating pipe (16), and each layered sampler was communicated with corresponding medium percolate thief hatch (2) by described communicating pipe (16).
3. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 2, it is characterized in that, described top layer vegetation and soil for growth layer (6) thereof comprise the soil for growth layer of top layer vegetation and this top layer vegetation, and described soil for growth layer has 10cm thickness.
4. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 2, is characterized in that, described 5:1 soil cinder mixolimnion (7) has 10cm thickness, by greater particle size granulometric composition.
5. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 2, is characterized in that, described sawdust layer (8) has 0.5cm thickness.
6. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 2, is characterized in that, described 3:7 zeolite medical stone filter material layer (9) has 30cm thickness; And described 3:7 zeolite medical stone filter material layer (9) comprises zeolite and medical stone, the volume ratio of the two is 3:7, wherein, the thinner medical stone of particle under, the thicker zeolite of particle is upper.
7. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 2, is characterized in that, described 5:1 soil sawdust mixolimnion (10) has 10cm thickness.
8. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 2, is characterized in that, described former soil layer (11) has the thickness of upstream 60cm, downstream 20cm.
9. Urban Natural type bank band rainfall runoff subsurface infiltration purification simulation device according to claim 1, it is characterized in that, described water distribution external member (5) comprises flowrate control valve, by regulating described flowrate control valve to simulate the scavenging process of dissimilar city bank band to rainfall runoff under Different Diameter stream load condition.
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| CN105369767B (en) * | 2015-09-30 | 2018-08-07 | 四川大学 | Simulate retaining wall earthing spoil disposal area vegetation growth water test method |
| CN111474013A (en) * | 2020-03-22 | 2020-07-31 | 西南大学 | Collecting system capable of realizing quantitative research on surface runoff and interflow of slope farmland |
| CN113250034A (en) * | 2021-05-18 | 2021-08-13 | 华东师范大学 | Rainwater runoff step resistance control technology simulation device and method |
Citations (2)
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| CN2595792Y (en) * | 2003-01-28 | 2003-12-31 | 中国科学院沈阳应用生态研究所 | Soil quick percolation analogue device |
| CN102757155A (en) * | 2012-07-24 | 2012-10-31 | 华东师范大学 | Experimental facility for multi-medium percolation and purification of urban rainfall runoff |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007330889A (en) * | 2006-06-14 | 2007-12-27 | Japan Enviro Chemicals Ltd | Filter for recovering chemical substance in water, and method and apparatus for recovering chemical substance in water using this filter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2595792Y (en) * | 2003-01-28 | 2003-12-31 | 中国科学院沈阳应用生态研究所 | Soil quick percolation analogue device |
| CN102757155A (en) * | 2012-07-24 | 2012-10-31 | 华东师范大学 | Experimental facility for multi-medium percolation and purification of urban rainfall runoff |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2007-330889A 2007.12.27 |
| 周栋 等.沸石和麦饭石组合滤料对城市降雨径流氮磷去除效率的研究.《华东师范大学学报（自然科学版）》.2011,第187页1.3部分及第190-191页第3部分. * |
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