CN212388714U - Rainwater infiltration system for sponge city - Google Patents

Rainwater infiltration system for sponge city Download PDF

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Publication number
CN212388714U
CN212388714U CN202020508799.6U CN202020508799U CN212388714U CN 212388714 U CN212388714 U CN 212388714U CN 202020508799 U CN202020508799 U CN 202020508799U CN 212388714 U CN212388714 U CN 212388714U
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China
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rainwater
roadway
energy dissipation
grit chamber
sidewalk
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CN202020508799.6U
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Chinese (zh)
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张策
于吉铎
傅磊
任广欣
张群
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China Construction Eighth Engineering Division Co Ltd
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China Construction Eighth Engineering Division Co Ltd
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Abstract

The utility model relates to a rainwater filtration system for sponge city, rainwater filtration system includes: the rainwater channel is transversely buried in the sidewalk, kerbs are arranged on two sides of the sidewalk corresponding to the rainwater channel, and openings are formed in the kerbs corresponding to the rainwater channel; the energy dissipation grit chamber is arranged corresponding to the opening on one side far away from the roadway and is used for performing preliminary energy dissipation and sand setting on rainwater; the pebble ditch is arranged corresponding to one side of the energy dissipation grit chamber, which is far away from the opening, and further dissipates energy and settles sand for rainwater; the sunken greenbelt is arranged corresponding to one side of the pebble ditch, which is far away from the energy dissipation grit chamber, vegetation is planted on the sunken greenbelt, and rainwater is absorbed and purified through the vegetation; and a first gabion retaining wall provided along an edge of the sunken green land. The utility model discloses carry out infiltration, energy dissipation, buffering, retaining, absorption, purification to the rainwater, reduce the flood peak flow, reduce the roadway surface ponding, alleviate traffic pressure to avoid producing urban waterlogging and runoff pollution.

Description

Rainwater infiltration system for sponge city
Technical Field
The utility model relates to a technical field is administered to sponge urban environment, refers in particular to a rainwater filtration system for sponge city.
Background
In the traditional city, sustainable development and utilization of rainwater are not considered, and the concept of 'drainage' is emphasized. The traditional city just utilizes facilities such as inlet for stom water, rainwater pipeline and canal, rainwater pump station to collect and discharge fast the rainwater. Along with the continuous development of urbanization, the increase of road impervious road surfaces, the too many inlet for stom water, rainwater pipeline and canal, rainwater pump station of blind development will lead to the unable timely infiltration and the utilization of rainwater, has lead to the frequent emergence of urban waterlogging, and the impurity that is mingled with in the rainwater runoff has caused the pollution of runoff.
Therefore, it is highly desirable to provide a rainwater infiltration system for sponge cities, which can realize rainwater drainage while avoiding urban waterlogging and runoff pollution, to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a rainwater filtration system for sponge city to solve current urban rainwater system and take place urban waterlogging and runoff pollution's problem easily.
In order to achieve the above object, the utility model provides a rainwater filtration system for sponge city locates pavement department, pavement is located one side of roadway, a serial communication port, rainwater filtration system includes:
the rainwater channel is transversely buried in the sidewalk, two sides of the sidewalk are provided with kerbs corresponding to the rainwater channel, and the kerbs are provided with openings corresponding to the rainwater channel; rainwater on the roadway flows into the rainwater channel through the opening close to one side of the roadway;
the energy dissipation grit chamber is arranged corresponding to the opening on one side far away from the roadway, rainwater in the rainwater channel flows into the energy dissipation grit chamber from the opening on one side far away from the roadway, and the energy dissipation grit chamber performs primary energy dissipation and sand setting on the rainwater;
the pebble ditch is arranged corresponding to one side, far away from the opening, of the energy dissipation grit chamber, rainwater in the energy dissipation grit chamber flows into the pebble ditch, and the pebble ditch further dissipates the energy of the rainwater and settles sand;
the sunken green land is arranged corresponding to one side of the pebble trench, which is far away from the energy dissipation grit chamber, a pit is formed on the surface of the sunken green land in a sunken mode, vegetation is planted in the pit, rainwater in the pebble trench flows into and is stored in the pit, and the rainwater is absorbed and purified through the vegetation; and
and the first gabion retaining wall is arranged along the edge of the sunken green land.
The utility model discloses a rainwater on the roadway flows into rainwater passageway through the opening that is close to roadway one side, rainwater flows through rainwater passageway and flows into energy dissipation grit chamber from the opening of keeping away from roadway one side, the impurity of energy dissipation grit chamber in can filtering the rainwater, consume, the energy of dispersion rivers, play preliminary energy dissipation and the effect of grit, the rainwater flows into the cobble ditch again and filters, the buffering, the cobble ditch plays deeper energy dissipation, the grit, the effect of scour prevention, the rainwater flows in at last and holds in formula greenery patches that sink, absorb the purification to the rainwater through the vegetation. The sunken greenbelt is used for collecting, absorbing, purifying and storing rainwater. The first gabion retaining wall is used for filtering rainwater in the sunken green land, so that pollutants in the rainwater cannot be diffused in a large area, and the landscape effect is improved. Whole rainwater filtration system can go on the rainwater, infiltration, energy dissipation, buffering, retaining, absorption, purification, and then reduce the flood peak flow, reduce the roadway surface ponding, alleviate traffic pressure to avoid producing city waterlogging and runoff pollution.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, still includes the concrete back that is the L shape, the concrete back has mutually perpendicular vertical portion and horizontal portion;
the longitudinal part is arranged between the kerb and the energy dissipation grit chamber on one side far away from the roadway, and the top surface of the longitudinal part is lower than the lower edge of the opening of the kerb connected with the longitudinal part;
the transverse part is embedded and fixed in the sidewalk, and the top surface of the transverse part is attached to the bottom surface of the curb.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, still including locating the pavement with the compound geomembrane layer that is the form of buckling between the energy dissipation grit chamber, compound geomembrane layer is including transversely laying in the concrete back with first portion between the pavement, vertically lay in the energy dissipation grit chamber is close to the second part of the side of pavement to and transversely lay in third portion in the energy dissipation grit chamber, the first portion the second part and the third portion connects gradually and mutually perpendicular.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, the height of second portion with energy dissipation grit chamber's height equals.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, still include locate the pavement near the concrete angle bead of one side of the roadway;
the concrete angle bead parcel is close to roadway one side the lower part of curb just the top part of concrete angle bead is located in the opening, the top of concrete angle bead is formed with an inclined plane, the inclined plane with the opening forms a water conservancy diversion space that is the slope form.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, still include locate the lane keep away from the side walk one side and a plurality of overflow wells in the formula greenery patches of sinking;
the overflow well comprises a cylindrical overflow well body, a well cover, a C20 fine stone concrete layer and a drain pipe, wherein the well cover is arranged at the top of the overflow well body in a covering manner, the C20 fine stone concrete layer is arranged at the bottom of the overflow well body, and the drain pipe is partially embedded in the C20 fine stone concrete layer;
and a cement mortar leveling layer is arranged on the inner wall of the overflow well body.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, supreme including is down followed to formula of sinking greenery patches: the planting soil layer is sunken to form the pits, and the vegetation is planted on the planting soil layer.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, first gabion barricade is by supreme including in proper order down: first order is joined in marriage rubble layer and first gabion box, first gabion box intussuseption is filled with first stone, first gabion barricade is kept away from one side of formula greenery patches that sinks is equipped with first polyester and filters non-woven fabrics layer.
The utility model discloses a rainwater filtration system for sponge city's further improvement lies in, the formula greenery patches that sinks is a plurality of, adjacent two be equipped with ecological buffering area between the formula greenery patches that sinks, ecological buffering area corresponds with both sides the formula greenery patches intercommunication that sinks, ecological buffering area set up the direction with the pavement set up the direction unanimously, the both sides in ecological buffering area are provided with second gabion barricade, second gabion barricade includes second level and joins in marriage metalling and second gabion box with a net, second gabion box with a net intussuseption is filled with the second stone, the second gabion barricade is kept away from one side in ecological buffering area is equipped with second polyester and filters the non-woven fabrics layer.
Drawings
Fig. 1 is the structural schematic diagram of the rainwater infiltration system for sponge city of the utility model.
Fig. 2 is a partially enlarged schematic view of fig. 1.
Fig. 3 is the utility model discloses a structural schematic for sponge city's rainwater filtration system's pavement.
Fig. 4 is a schematic structural view of the sinking type green land of the rainwater infiltration system for the sponge city.
Fig. 5 is a schematic structural view of the overflow well of the rainwater infiltration system for sponge city.
Figure 6 is the utility model discloses a structural schematic for a first gabion retaining wall of rainwater filtration system in sponge city.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a rainwater filtration system for sponge city locates pavement department, and the pavement is located one side of roadway, and rainwater filtration system includes: rainwater passageway, energy dissipation grit chamber, cobble ditch, formula greenery patches and first gabion barricade sink. The utility model discloses a rainwater on the roadway flows into rainwater passageway through the opening that is close to roadway one side, rainwater flows through rainwater passageway and flows into energy dissipation grit chamber from the opening of keeping away from roadway one side, the impurity of energy dissipation grit chamber in can filtering the rainwater, consume, the energy of dispersion rivers, play preliminary energy dissipation and the effect of grit, the rainwater flows into the cobble ditch again and filters, the buffering, the cobble ditch plays deeper energy dissipation, the grit, the effect of scour prevention, the rainwater flows in at last and holds in formula greenery patches that sink, absorb the purification to the rainwater through the vegetation. The sunken greenbelt is used for collecting, absorbing, purifying and storing rainwater. The first gabion retaining wall is used for filtering rainwater in the sunken green land, so that pollutants in the rainwater cannot be diffused in a large area, and the landscape effect is improved. Whole rainwater filtration system can go on the rainwater, infiltration, energy dissipation, buffering, retaining, absorption, purification, and then reduce the flood peak flow, reduce the roadway surface ponding, alleviate traffic pressure to avoid producing city waterlogging and runoff pollution.
The rainwater infiltration system for sponge city of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, in the present embodiment, a rainwater infiltration system for a sponge city is provided at a sidewalk, the sidewalk is located at one side of a roadway, and the rainwater infiltration system includes: rainwater channel 18, energy dissipation grit chamber 2, cobble ditch 3, formula of sinking greenery patches 4 and first gabion retaining wall 5. The rainwater channel 18 is transversely buried in the sidewalk 1, two sides of the sidewalk 1 are provided with kerbs 19 corresponding to the rainwater channel 18, the kerbs 19 are provided with openings corresponding to the rainwater channel 18, and the openings are communicated with the rainwater channel 18. The rainwater on the roadway 8 flows into the rainwater passage 18 through an opening near one side of the roadway 8. Energy dissipation grit chamber 2 corresponds the opening setting of keeping away from lane 8 one side, and the rainwater in the rainwater passageway 18 flows into energy dissipation grit chamber 2 from the opening of keeping away from lane 8 one side, and energy dissipation grit chamber 2 carries out preliminary energy dissipation and grit to the rainwater. The pebble ditch 3 is arranged corresponding to one side, away from the opening, of the energy dissipation grit chamber 2, rainwater in the energy dissipation grit chamber 2 flows into the pebble ditch 3, and the pebble ditch 3 further dissipates energy and settles sand for the rainwater. Sunken formula greenery patches 4 correspond cobble ditch 3 and keep away from energy dissipation grit chamber 2 one side setting, and sunken formula greenery patches 4 surperficial sunken being formed with a pit, and the planting has vegetation in the pit, and the rainwater in the cobble ditch flows into and holds in the pit, absorbs the purification through the vegetation to the rainwater. A first gabion retaining wall 5 is provided along the edge of the sunken green space 4. Preferably, a fan-shaped pebble buffer zone is arranged between the pebble ditch 3 and the sunken green land 4, so that rainwater is further filtered, energy is dissipated, scour is prevented, and the function of flow expansion is achieved. The water in the pebble buffer zone flows into the sunken green land 4 after being filtered by the first gabion retaining wall 5.
Referring to fig. 3, specifically, the opening near one side of the roadway 8 is connected to the road surface of the roadway 8, so that rainwater on the roadway 8 can flow into the rainwater channel 18 through the opening near one side of the roadway 8, further reducing water accumulated on the road surface of the roadway 8, and alleviating traffic pressure. The opening of the kerb 19 is 800mm 250mm in size and the rainwater passage 18 is 600mm 80mm in cross-sectional size.
Referring to fig. 1 and 3, the rainwater infiltration system in this embodiment is communicated with the openings on both sides through the rainwater channel 18, so that rainwater on the roadway 8 flows into the rainwater channel 18 through the opening on the side close to the roadway 8, the rainwater flows through the rainwater channel 18 and flows into the energy dissipation grit chamber 2 from the opening on the side far from the roadway 8, the energy dissipation grit chamber 2 can filter impurities in the rainwater, consume and disperse energy of the rainwater, and perform a preliminary energy dissipation and grit dissipation function, the rainwater flows into the pebble ditch 3 for filtering and buffering, the pebble ditch 3 performs a deeper energy dissipation, grit and erosion prevention function, the rainwater flows into the pebble buffer zone again, performs a deeper filtering, energy dissipation, erosion prevention and flow expansion function on the rainwater, and finally flows into the sunken green land 4 to be stored, and the rainwater is absorbed and purified through vegetation. The sunken greenbelt 4 is used for collecting, absorbing, purifying and storing rainwater. The first gabion retaining wall 5 is used for filtering the sunken green land 4, so that pollutants in rainwater cannot be diffused in a large area, and the landscape effect is improved. Whole rainwater filtration system can go on the rainwater, infiltration, energy dissipation, buffering, retaining, absorption, purification, and then reduce the flood peak flow, reduce 8 road surface pondings on the roadway, alleviate traffic pressure to avoid producing city waterlogging and runoff pollution.
Referring to fig. 3, in one embodiment, the sidewalk 1 includes, from bottom to top: the concrete block comprises a plain soil rammed layer 11, a graded gravel layer 12, a C20 concrete layer 13, a waterproof cement mortar layer 14, a prefabricated reinforced concrete cover plate 15, a dry hard cement mortar layer 16 and a brick block layer 17. Specifically, the expansion joints are symmetrically arranged on two sides of the C20 concrete layer 13 at equal intervals, and asphalt sand is adopted for caulking to prevent expansion caused by temperature change and contraction caused by structure, so that the pavement 1 is prevented from cracking or being damaged.
Referring to fig. 3, further, a rain water passage 18 is buried between the waterproof cement mortar layer 14 and the prefabricated reinforced concrete cover plate 15. The dry and hard cement mortar layer 16 is doped with 5% of waterproof powder, so that the waterproof, anti-seepage, anti-aging, freeze-thaw resistance and other performances of the waterproof cement mortar layer 14 are improved, rainwater in the rainwater channel 18 can be effectively prevented from seeping downwards through the waterproof cement mortar layer 14, and the rainwater can flow into the energy dissipation grit chamber 2 through the rainwater channel 18.
Referring to fig. 3, the rainwater infiltration system in the present embodiment further includes a concrete back 7 having an L shape, and the concrete back 7 has a longitudinal portion and a lateral portion perpendicular to each other. The longitudinal part is arranged between the curb 19 far away from the roadway 8 and the energy dissipation grit chamber 2, and the top surface of the longitudinal part is lower than the lower edge of the opening of the curb 19 connected with the longitudinal part. The transverse portion is embedded and fixed in the sidewalk 1, and the top surface of the transverse portion is attached to the bottom surface of the curb 19. The concrete back 7 plays a role in supporting and fixing the curb 19 on the second side of the sidewalk 1 on one hand, and plays a role in stabilizing the joint of the sidewalk 1 and the energy dissipation grit chamber 2 on the other hand.
Referring to fig. 3, the rainwater infiltration system in this embodiment further includes a bent composite geomembrane layer 21 disposed between the sidewalk 1 and the energy dissipation grit chamber 2, and the composite geomembrane layer 21 has waterproof and anti-seepage functions, so as to prevent rainwater in the energy dissipation grit chamber 2 from penetrating into the sidewalk 1 and damaging the sidewalk 1. The composite geomembrane layer 21 comprises a first part, a second part and a third part, wherein the first part is transversely paved between the concrete backrest 7 and the sidewalk 1, the second part is longitudinally paved on the side surface, close to the sidewalk, of the energy dissipation grit chamber 2, the third part is transversely paved in the energy dissipation grit chamber 2, and the first part, the second part and the third part are sequentially connected and are mutually vertical. The height of the second part is equal to the height of the energy dissipation grit chamber 2. Specifically, the first part is laid between the concrete backrest 7 and the graded gravel layer 12, and the first part is pressed and fixed through the concrete backrest 7 and the graded gravel layer 12. The third part is laid at the bottom of the energy dissipation grit chamber 2 according to the setting depth of the energy dissipation grit chamber 2 and is pressed and fixed by the soil in the energy dissipation grit chamber 2. Preferably, the inner wall of the energy dissipation grit chamber 2 is laid with a composite geomembrane. Specifically, the composite geomembrane layer is made of two cloth films and one film.
Referring to fig. 3, the rainwater infiltration system in the embodiment further includes a concrete corner 81 disposed on one side of the sidewalk near the roadway 8, wherein the concrete corner 81 is disposed in the roadway 8 and is used for fixedly connecting the curb 19 to the sidewalk 1. The concrete angle bead 81 wraps the lower portion of the curb 19 located on one side, close to the roadway 8, of the sidewalk, and the top portion of the concrete angle bead 81 is located in the opening, an inclined surface is formed at the top of the concrete angle bead 81, the inclined surface and the opening form an inclined flow guide space, and the inclined shape of the flow guide space helps rainwater of the roadway 8 to be smoothly guided into the rainwater channel 18. Specifically, the concrete guard 81 is embedded in the roadway 8.
Referring to fig. 1, fig. 2 and fig. 5, the rainwater infiltration system in this embodiment further includes a plurality of overflow wells 9 disposed on one side of the roadway 8 away from the sidewalk 1 and in the sunken green land 4, each overflow well 9 includes a cylindrical overflow well body 91, a well lid 92 covering the top of the overflow well body 91, a C20 fine stone concrete layer 93 disposed at the bottom of the overflow well body 91, and a drain pipe 94 partially embedded in the C20 fine stone concrete layer 93, the overflow well body 91, the well lid 92 and the C20 fine stone concrete layer 93 enclose to form an accommodation space, and the accommodation space is communicated with the drain pipe 94.
Referring to fig. 5, preferably, a cement mortar leveling layer 95 is disposed on the inner wall of the overflow well body 91, and the cement mortar leveling layer 95 is doped with 5% waterproof powder to prevent rainwater in the accommodating space from penetrating into the overflow well body 91.
Specifically, the roadway 8 is inclined from the side far away from the sidewalk 1 to the side close to the sidewalk, and the height of the side far away from the sidewalk 1 is higher than that of the side close to the sidewalk 1, so that rainwater on the roadway 8 flows to the sidewalk 1 first and flows into the opening of the side close to the roadway 8. However, when the amount of rainwater on the roadway is too much, rainwater on one side of the roadway 8 is gathered on one side of the roadway 8 away from the sidewalk 1, and then can flow into the overflow well 9 located on one side of the roadway 8 away from the sidewalk 1, and is discharged into the urban rainwater pipe network after being filtered by the overflow well 9, so that the purposes of reducing peak flow, reducing surface water, relieving traffic pressure and avoiding urban waterlogging and runoff pollution are achieved.
The plurality of overflow wells 9 in the sunken green lands 4 are used for discharging rainwater in the sunken green lands 4, controlling the water storage amount of the rainwater in the sunken green lands 4 and avoiding the excessive rainwater stored in the sunken green lands 4 from breeding bacteria and pests.
Referring to fig. 4, the subsidence greenbelt 4 comprises, from bottom to top: the planting soil layer 41 is sunken to form a pit, and the vegetation is planted on the planting soil layer 41. The planting soil has high permeability coefficient and can filter rainwater in time. Specifically, a 1000-square-meter subsided green land has 300 cubic meters of water storage capacity, and the storage regulation capacity of the green land is enough for reducing the peak flood flow, reducing the surface water and relieving the traffic pressure. The vegetation is flood-resistant, drought-resistant, salt-resistant and stain-resistant rural vegetation, and the rural soil vegetation has strong vitality and tolerance and good adaptability to climate and environment, so that the later-period operation and maintenance cost is greatly saved.
Referring to fig. 6, the first gabion retaining wall 5 comprises from bottom to top in sequence: the first-stage gravel layer 51 and the first gabion net cage 52 are arranged, first stones are filled in the first gabion net cage 52, and a first polyester filtering non-woven fabric layer 53 is arranged on one side, away from the sunken green land 4, of the first gabion retaining wall 5. The first polyester filtering non-woven fabric layer 53 on the first gabion retaining wall 5 plays a role in filtering, rainwater in the sunken green land 4 is filtered, diffusion of pollutants in the rainwater is avoided, and the landscape effect is improved. The first gabion retaining wall 5 is stable in structure and strong in anti-scouring capacity.
Referring to fig. 1 and 2, the sunken greenbelts 4 are a plurality of, an ecological buffer zone 6 is arranged between two adjacent sunken greenbelts 4, the ecological buffer zone 6 is communicated with the sunken greenbelts 4 corresponding to two sides, the setting direction of the ecological buffer zone 6 is consistent with that of the sidewalk 1, second gabion retaining walls 61 are arranged on two sides of the ecological buffer zone 6, each second gabion retaining wall 61 comprises a second-level crushed stone layer and a second gabion cage, second stones are filled in the second gabion cage, and a second polyester filter non-woven fabric layer is arranged on one side, away from the ecological buffer zone 6, of the second gabion retaining wall 61. The ecological buffer zone 6 plays a role in filtering, absorbing and purifying the rainwater entering the ecological buffer zone 6 through rainfall, and meanwhile, the filtered, absorbed and purified rainwater flows into the sunken green land 4. The second polyester on the second gabion retaining wall 61 filters the non-woven fabric layer and plays a role in filtration, rainwater in the ecological buffer zone 6 plays a role in filtration, diffusion of pollutants in the rainwater is avoided, and the landscape effect is improved. The second gabion retaining wall 61 is stable in structure and strong in anti-scouring capacity.
Specifically, the first gabion mesh cage 52 and the second gabion mesh cage are formed by spot welding galvanized mesh sheets, the diameter is 4-5mm, the tensile strength is 450N per square meter, and the mesh openings are 10 x 10 cm. The first polyester filtering non-woven fabric layer 53 and the second polyester filtering non-woven fabric layer were made of polyester filtering non-woven fabric and had a weight of 200 g/square meter.
By adopting the technical scheme, the utility model discloses following beneficial effect has:
the utility model discloses a rainwater on the roadway flows into rainwater passageway through the opening that is close to roadway one side, rainwater flows through rainwater passageway and flows into energy dissipation grit chamber from the opening of keeping away from roadway one side, the impurity of energy dissipation grit chamber in can filtering the rainwater, consume, the energy of dispersion rivers, play preliminary energy dissipation and the effect of grit, the rainwater flows into the cobble ditch again and filters, the buffering, the cobble ditch plays deeper energy dissipation, the grit, the effect of scour prevention, the rainwater flows in at last and holds in formula greenery patches that sink, absorb the purification to the rainwater through the vegetation. The sunken greenbelt is used for collecting, absorbing, purifying and storing rainwater. The first gabion retaining wall is used for filtering rainwater in the sunken green land, so that pollutants in the rainwater cannot be diffused in a large area, and the landscape effect is improved. Whole rainwater filtration system can go on the rainwater, infiltration, energy dissipation, buffering, retaining, absorption, purification, and then reduce the flood peak flow, reduce the roadway surface ponding, alleviate traffic pressure to avoid producing city waterlogging and runoff pollution.
It should be noted that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.

Claims (9)

1. A rainwater infiltration system for sponge cities, provided at sidewalks located at one side of a roadway, comprising:
the rainwater channel is transversely buried in the sidewalk, two sides of the sidewalk are provided with kerbs corresponding to the rainwater channel, and the kerbs are provided with openings corresponding to the rainwater channel; rainwater on the roadway flows into the rainwater channel through the opening close to one side of the roadway;
the energy dissipation grit chamber is arranged corresponding to the opening on one side far away from the roadway, rainwater in the rainwater channel flows into the energy dissipation grit chamber from the opening on one side far away from the roadway, and the energy dissipation grit chamber performs primary energy dissipation and sand setting on the rainwater;
the pebble ditch is arranged corresponding to one side, far away from the opening, of the energy dissipation grit chamber, rainwater in the energy dissipation grit chamber flows into the pebble ditch, and the pebble ditch further dissipates the energy of the rainwater and settles sand;
the sunken green land is arranged corresponding to one side of the pebble trench, which is far away from the energy dissipation grit chamber, a pit is formed on the surface of the sunken green land in a sunken mode, vegetation is planted in the pit, rainwater in the pebble trench flows into and is stored in the pit, and the rainwater is absorbed and purified through the vegetation; and
and the first gabion retaining wall is arranged along the edge of the sunken green land.
2. The rainwater infiltration system for sponge cities of claim 1, further comprising a concrete back rest in the shape of an L having a longitudinal portion and a transverse portion perpendicular to each other;
the longitudinal part is arranged between the kerb and the energy dissipation grit chamber on one side far away from the roadway, and the top surface of the longitudinal part is lower than the lower edge of the opening of the kerb connected with the longitudinal part;
the transverse part is embedded and fixed in the sidewalk, and the top surface of the transverse part is attached to the bottom surface of the curb.
3. The rainwater infiltration system for sponge city according to claim 2, further comprising a composite geomembrane layer with a bent shape between the sidewalk and the energy-dissipating grit chamber, wherein the composite geomembrane layer comprises a first part transversely laid between the concrete back and the sidewalk, a second part longitudinally laid on the side of the energy-dissipating grit chamber close to the sidewalk, and a third part transversely laid in the energy-dissipating grit chamber, and the first part, the second part and the third part are connected in sequence and are perpendicular to each other.
4. A rainwater infiltration system for sponge cities according to claim 3, characterized in that the height of the second section is equal to the height of the energy-dissipating grit chamber.
5. The rainwater infiltration system for sponge city according to claim 1, characterized by also comprising concrete corner protectors arranged on one side of the sidewalk close to the roadway;
the concrete angle bead parcel is close to roadway one side the lower part of curb just the top part of concrete angle bead is located in the opening, the top of concrete angle bead is formed with an inclined plane, the inclined plane with the opening forms a water conservancy diversion space that is the slope form.
6. The rainwater infiltration system for sponge cities as claimed in claim 1, further comprising a plurality of overflow wells provided on the side of said roadway remote from said sidewalk and within said sunken greenbelt;
the overflow well comprises a cylindrical overflow well body, a well cover, a C20 fine stone concrete layer and a drain pipe, wherein the well cover is arranged at the top of the overflow well body in a covering manner, the C20 fine stone concrete layer is arranged at the bottom of the overflow well body, and the drain pipe is partially embedded in the C20 fine stone concrete layer;
and a cement mortar leveling layer is arranged on the inner wall of the overflow well body.
7. Rainwater infiltration system for sponge cities according to claim 1, characterized in that said sunken greens comprise, from bottom to top: the planting soil layer is sunken to form the pits, and the vegetation is planted on the planting soil layer.
8. The rainwater infiltration system for sponge city according to claim 1, wherein said first gabion retaining wall comprises, from bottom to top: first order is joined in marriage rubble layer and first gabion box, first gabion box intussuseption is filled with first stone, first gabion barricade is kept away from one side of formula greenery patches that sinks is equipped with first polyester and filters non-woven fabrics layer.
9. The rainwater infiltration system for sponge city according to claim 1, wherein said sunk greenbelts are several, an ecological buffer zone is provided between two adjacent sunk greenbelts, said ecological buffer zone is communicated with said sunk greenbelts corresponding to two sides, said ecological buffer zone is provided in the same direction as said sidewalk, said two sides of said ecological buffer zone are provided with second gabion retaining walls, said second gabion retaining walls comprise a second-level gravel layer and a second gabion cage, said second gabion cage is filled with second stones, and a second polyester filtering non-woven fabric layer is provided on one side of said second gabion retaining wall away from said ecological buffer zone.
CN202020508799.6U 2020-04-09 2020-04-09 Rainwater infiltration system for sponge city Active CN212388714U (en)

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CN202020508799.6U CN212388714U (en) 2020-04-09 2020-04-09 Rainwater infiltration system for sponge city

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