CN219604512U - Purifying and regulating system for sponge city construction - Google Patents

Abstract

The utility model discloses a purification and regulation system for sponge city construction, which comprises: the bark covering layer is positioned above the gravel contact layer, and the gravel drainage layer is positioned below the gravel contact layer; the overflow well sequentially penetrates through the pebble contact layer, the bark covering layer, the gravel contact layer and the gravel drainage layer from top to bottom; the first storage tank is communicated with the overflow well and is arranged on the bark covering layer; and the second storage tank is communicated with the overflow well and is positioned in the gravel drainage layer. The utility model adopts a multi-layer and multi-step structural design, the three-level structural system of the pebble contact layer, the gravel contact layer and the gravel drainage layer is relatively stable, the structure is not damaged due to rain wash, and meanwhile, the hydraulic retention time is prolonged, so that the sewage interception and purification functions of the composite ecological treatment system integrating plants, soil and microorganisms are improved.

Description

Purifying and regulating system for sponge city construction

Technical Field

The utility model relates to the technical field of sponge city construction, in particular to a purification and regulation system for sponge city construction.

Background

Under the background of global water resource shortage, the active development and utilization of water resources to realize cyclic utilization become an important condition for sustainable urban development. The rainwater resource is an important link of urban water circulation, and plays a very key role in improving urban ecological environment and effectively relieving water resource shortage. In order to achieve the aims of relieving the shortage of water resources, improving the water quality type water shortage and the like, the aim of recycling rainwater resources and the like is very important by building sponge cities in the city development and construction process at home and abroad. In the construction process of the sponge city, the rainwater needs to be subjected to sewage interception and purification treatment in order to realize the water recycling of rainwater resources, wherein the biological detention facility is the most efficient ecological treatment facility for realizing the water recycling.

The biological detention facility is an ecological treatment facility for realizing the storage and the permeation of rainwater and purifying the rainwater through the adsorption and the degradation of plants, soil and a microbial system. However, the conventional bioretention facilities at present have disadvantages in process design and filler selection, such as unstable performance in reducing pollutants in runoff rainwater, poor purification treatment effect, and the like. Meanwhile, municipal water supply is used for backwashing of a third connecting pipe of the biological detention facility and flushing of a mud settling chamber of the overflow well, so that the recycling of rainwater resources is not facilitated.

Disclosure of Invention

The utility model aims to solve the technical problems that: the utility model provides a purification and regulation system for sponge city construction, which aims to solve the technical problems of unstable reduction performance, poor purification treatment effect and low cyclic utilization of rainwater resources of the existing biological detention facility runoff rainwater pollutants.

The technical scheme adopted for solving the technical problems is as follows: a purification regulation system for sponge city construction, comprising: the gravel drainage layer is positioned below the gravel contact layer; the overflow well sequentially penetrates through the pebble contact layer, the bark covering layer, the gravel contact layer and the gravel drainage layer from top to bottom; a first storage tank in communication with the overflow well, the first storage tank disposed on the bark blanket; and the second storage tank is communicated with the overflow well and is positioned inside the gravel drainage layer.

Therefore, the rainwater can be purified and filtered through the pebble contact layer, the gravel contact layer and the gravel drainage layer, so that harmful substances in the rainwater are removed, the gravel drainage layer can also ensure that the percolated rainwater is timely discharged, and the rainwater can flow into the overflow well through the third connecting pipe; the three-level structure system of the pebble contact layer, the gravel contact layer and the gravel drainage layer is relatively stable by adopting a multi-level and multi-step structure design, and the structure is not damaged by rain wash; meanwhile, the hydraulic retention time is prolonged, the sewage interception and purification functions of the composite ecological treatment system integrated with plants, soil and microorganisms are improved, and rainwater can be reasonably regulated and stored through the design of the first storage tank and the second storage tank, so that water resources are saved.

Further, the overflow well is provided with a three-way connector at the top and inside the gravel drainage layer, a third connecting pipe is connected to a first connector of the three-way connector, a first connecting pipe is connected to a second connector of the three-way connector, a second connecting pipe is connected to a third connector of the three-way connector, an outlet end of the first connecting pipe is communicated with the first storage tank, and an outlet end of the second connecting pipe is communicated with the second storage tank.

Further, a first filling medium exchange soil layer and a first permeable geotechnical cloth layer are arranged between the bark covering layer and the sand contact layer, and the first permeable geotechnical cloth layer is positioned below the first filling medium exchange soil layer.

Further, a second filling medium soil layer and a second permeable geotechnical cloth layer are arranged between the sand and stone contact layer and the gravel drainage layer, and the second permeable geotechnical cloth layer is positioned below the second filling medium soil layer. From this, first trade fill-in medium soil layer and second trade fill-in medium soil layer and can carry out further purification, filtration to the rainwater, first geotechnique's cloth layer that permeates water can ensure that first trade fill-in medium soil layer can not take place soil erosion and water loss, second geotechnique's cloth layer that permeates water can ensure that second trade fill-in medium soil layer can not take place soil erosion and water loss.

Further, an ultrahigh retention layer is arranged above the pebble contact layer, and an impermeable membrane layer is arranged below the gravel drainage layer. Therefore, the ultra-high retention layer can store rainwater, so that the rainwater can flow into an overflow well through the pebble contact layer, the bark covering layer, the first filling medium soil layer, the first permeable geotechnical cloth layer, the gravel contact layer, the second filling medium soil layer, the second permeable geotechnical cloth layer and the gravel drainage layer in sequence, finally flow into the first storage tank through the first connecting pipe for collection, and flow into the second storage tank through the second connecting pipe for collection; the impermeable membrane layer can prevent the occurrence of secondary disasters.

Further, the third connecting pipe comprises a horizontal section and a vertical section, wherein the horizontal section is positioned in the gravel drainage layer, and the vertical section sequentially penetrates through the gravel drainage layer, the second permeable geotechnical cloth layer, the second filling medium exchange soil layer, the sand contact layer, the first permeable geotechnical cloth layer, the first filling medium exchange soil layer, the bark cover layer, the pebble contact layer and the ultrahigh detention layer.

Further, a plurality of holes are formed in the horizontal section, and a back flushing port is formed in the top of the vertical section. Therefore, the back flushing port can prevent the third connecting pipe from being blocked, and the third connecting pipe is prevented from being blocked due to the fact that external impurities pass through the back flushing port, so that the operation of the whole purification and regulation system is further influenced.

Further, the top of overflow well is provided with overflow formula inlet for stom water, first storage tank is located one side of overflow formula inlet for stom water, the bottom of overflow well is provided with the silt chamber.

Further, the top of overflow well is provided with overflow formula inlet for stom water, first storage tank is located one side of overflow formula inlet for stom water, the bottom of overflow well is provided with the silt chamber. Therefore, the overflow type rain water inlet can directly flow out the rainwater exceeding the standard into the overflow well, so that the rainwater on the road can be timely discharged in the process of ultra-large rainfall, and the phenomenon that excessive accumulated water is accumulated on the road is avoided; the second storage tank is used for collecting the purified and filtered rainwater, the purified and filtered rainwater can be used for greening irrigation and road watering, and the first storage tank is used for collecting the purified and filtered rainwater and flushing a third connecting pipe back flushing and an overflow well mud settling chamber.

Further, the bark cover layer is fir bark. Therefore, the bark cover layer has certain water-retaining, purifying and filtering functions, and the fir bark has certain water-retaining function and moderate smell.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model adopts a multi-layer and multi-step structural design, the three-level structural system of the pebble contact layer, the gravel contact layer and the gravel drainage layer is relatively stable, the structure is not damaged due to rain wash, meanwhile, the hydraulic retention time is prolonged, the sewage interception and purification functions of the composite ecological treatment system integrating plants, soil and microorganisms are improved, and the application range is wide, including communities, roads, squares and the like.

2. The overflow well is provided with a three-way joint which is respectively connected with a third connecting pipe, a first connecting pipe and a rainwater drainage pipe. The first storage tank collects rainwater subjected to sewage interception and purification treatment during rainfall and is used for back flushing of the third connecting pipe and flushing of the overflow well mud settling chamber, and the second storage tank collects rainwater subjected to sewage interception and purification treatment and is used for greening irrigation and road sprinkling, so that water resources are saved.

3. The bark covering layer adopts fir bark, has a certain water-retaining effect and has moderate smell. The ceramic powder is adopted to replace fine sand in the proportion of the medium-changing soil, so that the high-pressure-resistant ceramic powder has higher specific surface area and stronger adsorption capacity.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic cross-sectional view of a purification and regulation system for sponge city construction according to the present utility model;

FIG. 2 is a schematic plan view of a purification and regulation system for sponge city construction according to the present utility model;

FIG. 3 is a schematic diagram of the installation of the overflow well and the second storage tank of the present utility model.

In the figure: 1. an ultra-high retention layer; 2. a pebble contact layer; 3. bark cover layer; 4. a first fill-medium layer; 401. a second medium-changing soil layer; 5. a first water permeable geotextile layer; 501. a second water permeable geotextile layer; 6. a sand contact layer; 7. a gravel drainage layer; 8. an impermeable membrane layer; 9. overflow type gully; 10. a back flushing port; 11. a first storage tank; 12. a third connection pipe; 121. a horizontal section; 122. a vertical section; 13. an overflow well; 14. a first connection pipe; 15. a second connection pipe; 16. a mud settling chamber; 17. a second storage tank.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 3, which are preferred embodiments of the present utility model, the purification and regulation system for sponge city construction of the present embodiment comprises: the pebble contact layer 2, the bark cover layer 3, the gravel contact layer 6 and the gravel drainage layer 7, wherein the pebble contact layer 2 is positioned above the bark cover layer 3, the bark cover layer 3 is positioned above the gravel contact layer 6, and the gravel drainage layer 7 is positioned below the gravel contact layer 6; an overflow well 13, wherein the overflow well 13 sequentially penetrates through the pebble contact layer 2, the bark covering layer 3, the gravel contact layer 6 and the gravel drainage layer 7 from top to bottom; a first storage tank 11, the first storage tank 11 being in communication with the overflow well 13, the first storage tank 11 being arranged on the bark cover layer 3; a second storage tank 17, the second storage tank 17 being in communication with the overflow well 13, the second storage tank 17 being located inside the gravel drainage layer 7. For example, the thickness of the pebble contact layer 2 is 30mm, the particle diameter of the pebbles is 30mm-50mm, the thickness of the gravel contact layer 6 is 100mm, the particle diameter of the gravel is 20mm-30mm, the thickness of the gravel drainage layer 7 is 300mm, the particle diameter of the gravel is 10mm-20mm, the rainwater can be purified and filtered through the pebble contact layer 2, the gravel contact layer 6 and the gravel drainage layer 7, the harmful substances in the rainwater can be removed, and the gravel drainage layer 7 can also ensure that the percolated rainwater is discharged in time, so that the rainwater can flow into the overflow well 13 through the third connecting pipe 12. Therefore, a three-level structure system of the pebble contact layer 2, the gravel contact layer 6 and the gravel drainage layer 7 is relatively stable by adopting a multi-level and multi-step structure design, and the structure is not damaged by rain wash; meanwhile, the hydraulic retention time is prolonged, the sewage interception and purification functions of the composite ecological treatment system integrated with plants, soil and microorganisms are improved, and rainwater can be reasonably regulated and stored through the design of the first storage tank and the second storage tank 17, so that water resources are saved.

In this embodiment, a three-way joint is disposed on the overflow well 13 and located inside the gravel drainage layer 7, a third connecting pipe 12 is connected to a first joint of the three-way joint, a first connecting pipe 14 is connected to a second joint of the three-way joint, a second connecting pipe 15 is connected to the third joint of the three-way joint, an outlet end of the first connecting pipe 14 is communicated with the first storage tank 11, and an outlet end of the second connecting pipe 15 is communicated with the second storage tank 17. For example, the first storage tank 11 may be a siphon water storage tank, the first connection pipe 14 may be a siphon pipe, and the second storage tank 17 may be a modular rainwater regulation tank. Thereby, the first storage tank 11 collects the purified and filtered rainwater for back flushing of the third connecting pipe 12 and flushing of the mud settling chamber 16 of the overflow well 13; the second storage tank 17 collects the purified and filtered rainwater and can be used for greening irrigation and road sprinkling.

In this embodiment, a first filling medium soil layer 4 and a first permeable geotechnical cloth layer 5 are disposed between the bark covering layer 3 and the sand contact layer 6, the first permeable geotechnical cloth layer 5 is located below the first filling medium soil layer 4, a second filling medium soil layer 401 and a second permeable geotechnical cloth layer 501 are disposed between the sand contact layer 6 and the gravel drainage layer 7, the second permeable geotechnical cloth layer 501 is located below the second filling medium soil layer 401, an ultrahigh retention layer 1 is disposed above the pebble contact layer 2, and an impermeable membrane layer 8 is disposed below the gravel drainage layer 7. For example, the thickness of the ultra-high retention layer 1 is 300mm, and plants with long-term drought tolerance and short-term waterlogging tolerance with purification function are planted in a matched mode, suitable plants comprise boxwood melon seeds, oleander, hosta plantain, fine-leaf mango and the like, the ultra-high retention layer 1 can store rainwater, so that the rainwater can flow into the overflow well 13 through the pebble contact layer 2, the bark covering layer 3, the first filling medium soil layer 4, the first permeable geotechnical cloth layer 5, the sandstone contact layer 6, the second filling medium soil layer 401, the second permeable geotechnical cloth layer 501 and the drainage layer 7 in sequence, and finally flow into the first storage tank 11 through the first connecting pipe 14 for collection, and flow into the second storage tank 17 through the second connecting pipe 15 for collection; the thickness of the first filling medium soil layer 4 is 400mm, the thickness of the second filling medium soil layer 401 is 150mm, and the first filling medium soil layer and the second filling medium soil layer can contact and adsorb and degrade pollutants in runoff rainwater in a multi-layer and multi-step manner; the density of the first water-permeable geotechnical cloth layer 5 and the second water-permeable geotechnical cloth layer 501 is 200g/m2, the vertical permeability coefficient is not less than 5 multiplied by 10 < -2 > cm/s, the thickness is not less than 2.4mm, the breaking strength is not less than 9.5KN/m, and the CBR bursting strength is not less than 1.5KN; the thickness of the anti-seepage film layer 8 is not less than 2.0mm, the density is 340g/m < 2 >, and the anti-seepage film layer 8 can be used for placing the occurrence of secondary disasters. The first filling medium soil layer 4 and the second filling medium soil layer 401 are prepared by stirring and mixing 10% of ceramic powder, 40% of medium coarse sand, 45% of landscape planting soil, 4% of coconut husk and 1% of nutrient soil (five substances are all existing materials and can be obtained through purchase, and only stirring and mixing are carried out between the five substances, so that chemical reaction can not occur), and the rainwater runoff pollutants can be effectively removed and the growth and metabolism requirements of plants and microorganisms can be met. The ceramic powder has higher specific surface area and stronger adsorption capacity. Therefore, the first filling medium soil layer 4 and the second filling medium soil layer 401 can further purify and filter rainwater, the first permeable geotechnical cloth layer 5 can ensure that the first filling medium soil layer 4 cannot be subjected to water and soil loss, and the second permeable geotechnical cloth layer 501 can ensure that the second filling medium soil layer 401 cannot be subjected to water and soil loss.

In this embodiment, the third connecting pipe 12 includes a horizontal segment 121 and a vertical segment 122, the horizontal segment 121 is located in the gravel drainage layer 7, the vertical segment 122 sequentially passes through the gravel drainage layer 7, the second permeable geotechnical cloth layer 501, the second filling medium exchange layer 401, the sand and stone contact layer 6, the first permeable geotechnical cloth layer 5, the first filling medium exchange layer 4, the bark covering layer 3, the pebble contact layer 2 and the ultra-high retention layer 1, a plurality of holes are formed in the horizontal segment 121, and a back flushing port 10 is formed in the top of the vertical segment 122. For example, the third connecting pipe 12 may be a blind pipe, the hole may be a blind hole, the third connecting pipe 12 is made of PE pipe with DN400, and the aperture ratio of the third connecting pipe 12 is 3%, so that runoff rainwater can be drained in time. Therefore, the back flushing port can prevent the third connecting pipe from being blocked, and the third connecting pipe is prevented from being blocked due to the fact that external impurities pass through the back flushing port, so that the operation of the whole purification and regulation system is further influenced.

In this embodiment, the top of the overflow well 13 is provided with an overflow gully 9, the first storage tank 11 is located at one side of the overflow gully 9, and the bottom of the overflow well 13 is provided with a mud settling chamber 16. For example, overflow well 13 is made of PVC tubing of DN 400; the overflow type rain water inlet 9 is made of PP material, and the overflow type rain water inlet 9 can directly flow out the exceeding rainwater into the overflow well 13, so that the road rain water can be timely discharged in the process of ultra-large rainfall, and the road is prevented from being excessively accumulated; the first storage tank 11 is made of high carbon steel, and has a diameter of 500mm and a mounting height of 750mm; the first connecting tube 14 is made of a PE tube with DN 32; the second connecting pipe 15 is made of HDPE pipe DN 200; the first storage tank 11 collects rainwater subjected to sewage interception and purification treatment and is used for back flushing of the third connecting pipe 12 and flushing of a mud settling chamber of the overflow well 13, and the second storage tank 17 collects rainwater subjected to sewage interception and purification treatment and can be used for greening irrigation and road sprinkling.

In this embodiment, the bark cover layer 3 is fir bark. For example, the bark cover layer 3 has a thickness of 30mm, the bark cover layer 3 has a certain water-retaining and purifying and filtering function, and the fir bark has a certain water-retaining function and a moderate smell.

The sewage interception and purification treatment of the rainwater of the utility model is as follows: rainwater sequentially permeates the ultrahigh retention layer 1, the pebble contact layer 2, the bark cover layer 3, the first filling medium exchange soil layer 4, the second filling medium exchange soil layer 401, the first permeable geotechnical cloth layer 5, the second permeable geotechnical cloth layer 501, the gravel contact layer 6 and the gravel drainage layer 7, permeates into the third connecting pipe 12 through holes, flows into the overflow well 13 through the third connecting pipe 12, part of rainwater is collected and stored in the first storage tank 11 in a siphoning mode through the first connecting pipe 14, is used for backwashing of the third connecting pipe 12 after a rainfall period and flushing of a silt chamber of the overflow well 13, and the other part of rainwater flows into the second storage tank 17 through the second connecting pipe 15 and is used for greening irrigation and road watering after the rainfall period, so that the regulation and storage functions are realized.

The utility model adopts a multi-layer and multi-step structural design, the three-level structural system of the pebble contact layer 2, the gravel contact layer 6 and the gravel drainage layer 7 is relatively stable, the structure is not damaged due to rain wash, meanwhile, the hydraulic retention time is prolonged, the sewage interception and purification functions of the composite ecological treatment system integrating plants, soil and microorganisms are improved, and the application range is wider, including communities, roads, squares and the like; the overflow well 13 is provided with a three-way joint which is respectively connected with the third connecting pipe 12, the first connecting pipe 14 and the rainwater drainage pipe. The first storage tank 11 collects rainwater subjected to sewage interception and purification treatment during rainfall for backwashing of the third connecting pipe 12 and flushing of a mud settling chamber of the overflow well 13, and the second storage tank 17 collects rainwater subjected to sewage interception and purification treatment for greening irrigation and road sprinkling, so that water resources are saved; the bark cover layer 3 adopts fir bark, has certain water retention effect and moderate smell.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims (9)

1. A purification and regulation system for sponge city construction, comprising:

the pebble bark cutting device comprises a pebble contact layer (2), a bark covering layer (3), a gravel contact layer (6) and a gravel drainage layer (7), wherein the pebble contact layer (2) is positioned above the bark covering layer (3), the bark covering layer (3) is positioned above the gravel contact layer (6), and the gravel drainage layer (7) is positioned below the gravel contact layer (6);

an overflow well (13), wherein the overflow well (13) sequentially penetrates through the pebble contact layer (2), the bark covering layer (3), the gravel contact layer (6) and the gravel drainage layer (7) from top to bottom;

-a first storage tank (11), said first storage tank (11) being in communication with said overflow well (13), said first storage tank (11) being arranged on said bark cover layer (3);

-a second storage tank (17), said second storage tank (17) being in communication with said overflow well (13), said second storage tank (17) being located inside said gravel drainage layer (7).

2. The purification and regulation system for sponge city construction according to claim 1, characterized in that a three-way joint is arranged on the overflow well (13) and positioned in the gravel drainage layer (7), a first joint of the three-way joint is connected with a third connecting pipe (12), a second joint of the three-way joint is connected with a first connecting pipe (14), the third joint of the three-way joint is connected with a second connecting pipe (15), an outlet end of the first connecting pipe (14) is communicated with the first storage tank (11), and an outlet end of the second connecting pipe (15) is communicated with the second storage tank (17).

3. The purification and regulation system for sponge city construction according to claim 2, characterized in that a first filling medium soil layer (4) and a first permeable geotechnical cloth layer (5) are arranged between the bark cover layer (3) and the sand contact layer (6), and the first permeable geotechnical cloth layer (5) is positioned below the first filling medium soil layer (4).

4. A purification and regulation system for sponge urban construction according to claim 3, characterized in that a second filling medium soil layer (401), a second water permeable geotechnical cloth layer (501) are arranged between the gravel contact layer (6) and the gravel drainage layer (7), and the second water permeable geotechnical cloth layer (501) is positioned below the second filling medium soil layer (401).

5. The purification and regulation system for sponge city construction according to claim 4, wherein an ultra-high retention layer (1) is provided above the pebble contact layer (2), and an impermeable membrane layer (8) is provided below the gravel drainage layer (7).

6. The purification and regulation system for sponge urban construction according to claim 5, characterized in that the third connecting pipe (12) comprises a horizontal section (121) and a vertical section (122), the horizontal section (121) is located in the gravel drainage layer (7), the vertical section (122) sequentially passes through the gravel drainage layer (7), the second water-permeable geotechnical cloth layer (501), the second filling medium soil layer (401), the sand contact layer (6), the first water-permeable geotechnical cloth layer (5), the first filling medium soil layer (4), the bark cover layer (3), the pebble contact layer (2) and the ultra-high retention layer (1).

7. The purification and regulation system for sponge city construction as claimed in claim 6 wherein a plurality of holes are provided in the horizontal section (121), and a back flushing port (10) is provided at the top of the vertical section (122).

8. The purification and regulation system for sponge city construction according to claim 1, wherein the top of the overflow well (13) is provided with an overflow type gully (9), the first storage tank (11) is located at one side of the overflow type gully (9), and the bottom of the overflow well (13) is provided with a mud settling chamber (16).

9. Purification and regulation system for sponge urban construction according to claim 1, characterized in that the bark cover layer (3) is fir bark.