CN212610129U - Gardens rainwater clean system in sponge city - Google Patents

Abstract

The utility model relates to a gardens rainwater clean system in sponge city, it includes the pond, still includes the inner circle filtering area, undercurrent filtering area and the outer lane infiltration zone that set up around the pond from inside to outside, the undercurrent filtering area includes that the basis ramming soil layer, prevention of seepage membrane, prevention of seepage and permeation protection layer, ecological packing layer, surface soil layer and the green layer of planting that set gradually from bottom to top, the outer lane is infiltrated the district and is included gravel layer and the cobblestone layer that sets gradually from bottom to top, the top surface and the bottom surface of gravel layer and ecological packing layer parallel and level respectively. The utility model discloses continuously absorb ground runoff and handle when the rainfall, reduce nitrogen phosphorus content wherein, reduce the risk that the pond takes place eutrophication.

Description

Gardens rainwater clean system in sponge city

Technical Field

The utility model belongs to the technical field of sewage treatment's technique and specifically relates to a gardens rainwater clean system in sponge city is related to.

Background

The sponge city refers to a city which can be like a sponge, has good self-regulation and control capability on environment and natural disasters, has the effects of water absorption, water storage, water seepage and water purification when raining, and releases and purifies the stored water when needed. Ecological gardens are human-oriented, natural environment-based and ecological virtuous cycle human living forms, which are an important part of sponge city construction, but gardens as artificial ecosystems generally need a large amount of fertilizer application and pesticide spraying to ensure good growth of green plants in the gardens. In daily precipitation, due to the low topography of the pond, substances such as pesticides and fertilizers are usually dissolved in rainwater and then gathered into the pond in the garden, so that the eutrophication of the pond is caused.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a can carry out filterable gardens rainwater clean system in sponge city to rich nutrition rainfall runoff.

The utility model discloses an above-mentioned one of the utility model purpose can realize through following technical scheme:

the utility model provides a gardens rainwater clean system in sponge city, includes the pond, still includes the inner circle filtering area, undercurrent filtering area and the outer lane infiltration region that set up around the pond from inside to outside, the undercurrent filtering area includes that basic rammed earth layer, prevention of seepage membrane, prevention of seepage that set gradually from bottom to top permeate protective layer, ecological packing layer, surface soil layer and green layer of planting, the outer lane infiltration region includes gravel layer and the cobblestone layer that sets gradually from bottom to top, the top surface and the bottom surface parallel and level respectively of gravel layer and ecological packing layer.

By adopting the technical scheme, the inner ring filtering area can filter and block the anti-seepage protective layer, the ecological packing layer and the surface soil layer in the undercurrent filtering area, so that the water and soil loss caused by the fact that the water flows into the pond under the scouring of rainwater and pond water is prevented. The developed root system of green layer of planting can fix the topsoil layer, avoids the topsoil layer to flow into the pond along with the rainwater in, and simultaneously, the developed root system of green plant can absorb the composition of chemical fertilizer pesticide in the rainwater effectively, reduces the nitrogen phosphorus in the infiltration rainwater. Ecological packing layer can further absorb the decomposition to the pollutant (for example nitrogen phosphorus) of rainwater, and the prevention of seepage passes through the protective layer and can avoid ecological packing layer to cause the harm to the prevention of seepage membrane, and basic rammer layer plays the supporting role to each layer in the top, and the prevention of seepage membrane can avoid the rainwater to ooze down and cause basic rammer layer not hard up. The infiltration layer of outer lane can accelerate the rainwater and in the infiltration ability of outer lane, promotes the rainwater and enters into ecological packing layer, avoids when precipitation is more because the rainwater is limited to the infiltration ability of green layer of planting and surface soil layer and leads to a large amount of rainwater directly to merge the pond.

The present invention may be further configured in a preferred embodiment as: the inner ring filtering area comprises a gravel layer and a fixing net penetrating through the gravel layer, and the gravel layer is connected to the side faces of the anti-seepage protective layer, the ecological packing layer and the topsoil layer.

Through adopting above-mentioned technical scheme, the gravel layer can block prevention of seepage and pass through protective layer, ecological packing layer and topsoil layer, prevents soil erosion and water loss's emergence, and the gravel layer has better water permeability simultaneously, and the drainage that topsoil layer and ecological packing layer flow can flow in the pond through the gravel layer. In addition, the fixing net can fix large-sized gravel.

The present invention may be further configured in a preferred embodiment as: the rainwater collecting device comprises a water collecting well for collecting rainwater, a water distribution pipe communicated with the water collecting well and penetrating through a surface soil layer, and a water distribution pump arranged on the water distribution pipe to control the water distribution pipe to distribute water to the surface soil layer.

Through adopting above-mentioned technical scheme, the sump pit can bear a large amount of precipitation, avoids the overlarge and throughput that surpasss undercurrent filtration district of ground runoff. When stopping precipitation, the water distribution pump is opened to in continuously extracting the rainwater in the sump pit and carrying the topsoil layer, the rainwater in the topsoil layer is handled to the root system of green layer of planting in the topsoil layer, and ecological packing layer is handled the rainwater of infiltration, thereby has increased the treatment time to the rainwater.

The present invention may be further configured in a preferred embodiment as: the circulating device further comprises a water collecting pipe and a water collecting pump, the water collecting pipe penetrates through the anti-seepage protective layer, the two ends of the anti-seepage protective layer are communicated with the pond and the water collecting well respectively, and the water collecting pump is arranged on the water collecting pipe and used for pumping pond water into the water collecting well.

By adopting the technical scheme, when no precipitation exists, the water collecting pump is started and continuously pumps the water in the pond into the water collecting well, and the water distributing pump is started again and continuously conveys the water in the water collecting well to the undercurrent filtering area, so that the continuous filtering of the water in the pond by the undercurrent filtering area is realized, the eutrophication of the water in the pond can be effectively reduced, and the occurrence of water bloom is prevented. And meanwhile, an additional device is not needed to be arranged for watering the green plant layer.

The present invention may be further configured in a preferred embodiment as: the green plant layer is divided into a cattail area and a reed area in the direction away from the pond.

By adopting the technical scheme, the cattail and reed have different adaptive capacities to water and can adapt to different water depths.

The present invention may be further configured in a preferred embodiment as: the ecological packing layer is composed of a round ceramsite filter material.

By adopting the technical scheme, the ceramsite filter material has the characteristics of hard surface, internal microporous property, high porosity and the like. Aerobic activated sludge is used for inoculation, and the treatment effect of the biological aerated filter can be achieved after two weeks of water inlet.

The present invention may be further configured in a preferred embodiment as: the top surface of cobble layer and the top surface parallel and level of topsoil layer and form the pavement that encircles the pond.

By adopting the technical scheme, the cobblestone has large particles, can effectively infiltrate rainwater, can be used as a sidewalk around the pond, does not need to additionally build the sidewalk, and is favorable for saving cost.

The present invention may be further configured in a preferred embodiment as: the anti-seepage protective layer is made of coarse sand.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the surface runoff is continuously absorbed and treated during rainfall, the nitrogen and phosphorus content in the rainwater is reduced, and the risk of eutrophication of the pond is reduced;

2. rainwater can be stored when the precipitation is large, and the rainwater is pumped into the undercurrent filtering area for treatment when the precipitation is reduced or no precipitation exists, so that the continuous work of the undercurrent filtering area is kept;

3. and when no precipitation exists, the circulating system is utilized to filter the pond water, so that the eutrophication of the pond water is reduced.

Drawings

Fig. 1 is an overall schematic diagram of a garden rainwater purification system of a sponge city in the embodiment.

In the figure, the position of the upper end of the main shaft,

1. a pond;

2. an outer infiltration zone; 21. a sandstone layer; 22. a cobble layer;

3. an undercurrent filtration zone; 31. ramming a soil layer on the foundation; 32. an impermeable membrane; 33. an anti-permeation protective layer; 34. an ecological packing layer; 35. a top soil layer; 36. a green plant layer; 361. a cattail area; 362. a reed area;

4. an inner ring filtering area; 41. a gravel layer; 42. fixing the net;

5. a circulation device; 51. a water collecting well; 52. a water distribution pipe; 53. distributing a water pump; 54. a water collection pipe; 55. a water collecting pump.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a gardens rainwater clean system in sponge city lasts the absorption ground runoff and handles when the rainfall, reduces nitrogen phosphorus content wherein, reduces pond 1 and takes place the risk of eutrophication, including pond 1, still include around pond 1 by outer to interior the setting gradually be used for receiving and make ground runoff infiltration's outer lane infiltration district 2, handle and filterable undercurrent filtration district 3 and be used for the inner circle filtration district 4 of spacing undercurrent filtration district 3.

The inner ring filtering area 4 comprises a gravel layer 41 and a fixing net 42, wherein the fixing net 42 is arranged in the gravel layer 41 and is in a spatial net shape, so that relative slippage of gravel is limited, and the gravel layer 41 is prevented from slipping and collapsing towards the pond 1.

The undercurrent filtering area 3 comprises a basic ramming layer 31, an impermeable membrane 32, an impermeable protective layer 33, an ecological filler layer 34, a surface soil layer 35 and a green plant layer 36 which are arranged from bottom to top in sequence, wherein the impermeable protective layer 33, the ecological filler layer 34 and the surface soil layer 35 are all connected to the side surface of a gravel layer 41. In this embodiment, the green plant layer 36 is divided into a cattail area 361 and a reed area 362 in the direction away from the pond 1, developed root systems of cattail and reed can fix the topsoil layer 35, the topsoil layer 35 is prevented from flowing into the pond 1 along with the ground radial flow, and meanwhile, the developed root systems of cattail and reed can effectively absorb the components of chemical fertilizers and pesticides in rainwater, so that the nitrogen and phosphorus content in the rainwater seeping downwards is reduced. In this embodiment, the ecological packing layer 34 is composed of a circular ceramsite filter material, which has the characteristics of hard surface, internal microporous, high porosity and the like, and can achieve the treatment effect of the biological aerated filter after aerobic activated sludge is inoculated and water enters for two weeks, so as to absorb and decompose inorganic pollutants and organic pollutants in the downward-permeating rainwater. In this embodiment, the impermeable protective layer 33 is made of coarse sand, so as to prevent the ecological filler layer 34 from damaging the impermeable membrane 32. The foundation ramming layer 31 plays a supporting role on each layer above, and the impermeable membrane 32 can prevent rainwater from infiltrating downwards to cause the foundation ramming layer 31 to be loosened.

The outer-ring infiltration area 2 comprises a gravel layer 21 and a cobblestone layer 22 which are sequentially arranged from bottom to top, the top surfaces and the bottom surfaces of the gravel layer 21 and the ecological packing layer 34 are respectively flush, and the top surface of the cobblestone layer 22 is flush with the top surface of the surface soil layer 35 to form a sidewalk surrounding the pond 1. The cobblestones have large particles, can effectively seep rainwater down, can be used as a sidewalk around the pond 1, does not need to additionally build the sidewalk, and is favorable for saving cost. The sandstone layer 21 has strong water storage capacity and can continuously convey rainwater to the ecological filler layer 34.

The system further comprises a circulating device 5, wherein the circulating device 5 comprises a water collecting well 51 used for collecting rainwater, a water distribution pipe 52 communicated with the water collecting well 51 and penetrating through a surface soil layer 35, a water distribution pump 53 arranged on the water distribution pipe 52, a water collecting pipe 54 communicated with the water collecting well 51 and penetrating through the anti-seepage protective layer 33, and a water collecting pump 55 arranged on the water collecting pipe 54, one end of the water collecting pipe 54 far away from the water collecting well 51 is communicated with the pond 1, the water distribution pump 53 is used for extracting water in the water collecting well 51, and the water collecting pump 55 is used for extracting water in the pond 1. The sump 51 can carry a large amount of precipitation, and the overlarge ground runoff is prevented from exceeding the treatment capacity of the undercurrent filtration area 3. When the precipitation is stopped, the water distribution pump 53 is started, the rainwater in the water collection well 51 is continuously extracted and conveyed to the topsoil layer 35, the root system of the green plant layer 36 in the topsoil layer 35 treats the rainwater in the topsoil layer 35, and the ecological packing layer 34 treats the downward-infiltrated rainwater, so that the rainwater treatment duration is prolonged. When no precipitation exists, the water collecting pump 55 is started, water in the pond 1 is continuously pumped into the water collecting well 51, the water distributing pump 53 is started again, and water in the water collecting well 51 is continuously conveyed to the undercurrent filtering area 3, so that continuous filtering of the water in the pond 1 by the undercurrent filtering area 3 is realized, eutrophication of the water in the pond 1 can be effectively reduced, and water bloom is prevented. And no additional device is needed to water the green plant layer 36.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a gardens rainwater clean system in sponge city, includes pond (1), its characterized in that still includes inner circle filtering area (4), undercurrent filtering area (3) and outer lane infiltration district (2) that set up from inside to outside around pond (1), undercurrent filtering area (3) include basic rammer layer (31), prevention of seepage membrane (32), prevention of seepage protective layer (33), ecological packing layer (34), topsoil layer (35) and green planting layer (36) that set gradually from bottom to top, outer lane infiltration district (2) include gravel layer (21) and cobblestone layer (22) that set gradually from bottom to top, the top surface and the bottom surface parallel and level respectively of gravel layer (21) and ecological packing layer (34).

2. Garden rainwater purification system for sponge cities as per claim 1, where the inner circle filtering area (4) comprises a gravel layer (41) connected to the side of the impermeable protection layer (33), the ecological filler layer (34) and the topsoil layer (35), and a fixing net (42) inserted in the gravel layer (41).

3. The garden rainwater purification system for the sponge city according to claim 1, further comprising a circulation device (5), wherein the circulation device (5) comprises a water collecting well (51) for collecting rainwater, a water distribution pipe (52) communicated with the water collecting well (51) and penetrating through the topsoil layer (35), and a water distribution pump (53) arranged on the water distribution pipe (52) for controlling the water distribution of the water distribution pipe (52) to the topsoil layer (35).

4. The garden rainwater purification system for the sponge city according to claim 3, wherein the circulation device (5) further comprises a water collection pipe (54) and a water collection pump (55), the water collection pipe (54) penetrates through the anti-seepage protection layer (33) and two ends of the water collection pipe are respectively communicated with the pond (1) and the water collection well (51), and the water collection pump (55) is arranged on the water collection pipe (54) and used for pumping the pond (1) into the water collection well (51).

5. The garden rainwater purification system in a sponge city according to claim 1, wherein the green vegetation layer (36) is divided into a cattail area (361) and a reed area (362) in a direction away from the pond (1).

6. The garden rainwater purification system in sponge city according to claim 1, characterized in that the ecological filler layer (34) is composed of round ceramsite filter material.

7. Garden rain purification system for sponge cities as per claim 1, where the top surface of the cobble layer (22) is level with the top surface of the topsoil layer (35) and forms a sidewalk around the pond (1).

8. Garden rainwater purification system for sponge cities according to claim 1, characterized in that the impermeable protection layer (33) is made of grit.

Images