CN112225348B - Method for collecting and purifying rainwater around building - Google Patents
Method for collecting and purifying rainwater around building Download PDFInfo
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- CN112225348B CN112225348B CN202011051808.4A CN202011051808A CN112225348B CN 112225348 B CN112225348 B CN 112225348B CN 202011051808 A CN202011051808 A CN 202011051808A CN 112225348 B CN112225348 B CN 112225348B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/103—Naturals or landscape retention bodies, e.g. ponds
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/18—Tanks for disinfecting, neutralising, or cooling sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention discloses a method for collecting and purifying rainwater around a building, which comprises the following steps: step one, collecting roof rainwater, surface rainwater and underground rainwater to a rainwater collecting pool; pumping rainwater in the rainwater collection tank through an absorption bell mouth, then pumping the rainwater into a sand filter tank through a rainwater recycling pressurization pump, putting a coagulant into the sand filter tank by a coagulation dosing device to mix with the rainwater, enabling the water discharged from the sand filter tank to sequentially enter a microporous filter and an ultrafiltration filter, connecting a clean water end of the ultrafiltration filter to a rainwater recycling clean water tank, and connecting the rainwater recycling clean water tank to a back flush end of the ultrafiltration filter through a back flush pump; and step three, conveying the water in the clear water tank to a waterscape pool to present a static waterscape. The invention can improve the humidity and microclimate of the soil and air around the building, reduce the urban heat island effect, create comfortable office environment, and enrich the landscape types and spatial levels of residential areas by implementing the landscape measures related to rainwater utilization.
Description
Technical Field
The invention belongs to the technical field of rainwater collection and purification, and particularly relates to a method for collecting and purifying rainwater around a building.
Background
Today, the voice of people in harmony with nature is higher and higher, water plays an important role as an intermediary in the space of a building, and the water can form a poetic and humanized space by combining with other elements. Water can create an environment which influences human emotion, and static water not only has a mirror reflection effect, but also has the effects of purifying the environment, planning the space, expanding the space and enriching the environmental color and the environmental atmosphere.
The characteristic waterscape design completely integrates the concept of 'storing wind and gathering gas to obtain water' and 'using aquatic property and carrying living things' in the traditional geomantic and hydrology of China with the mirror waterscape which is extremely simple in the west. The water flow which circulates and reciprocates takes away dust, thereby enjoying wealth, creating quiet, comfortable and elegant office atmosphere, and reflecting the water surface with calmness and transparency to the unique and ingenious ingenuity of designers and builders.
The large-area buildings and the hard pavement outside the buildings cover the original natural soil layer, the application of some stainless steel paving materials replaces the natural soil surface, if proper measures are not taken, the natural penetration of rainwater can be prevented, the conversion of surface water to underground water is influenced, and rainwater resources are lost, so that the design principle of green ecology and the value concept of sustainable development are violated. Meanwhile, a large amount of water is consumed for garage washing, greening irrigation, road sprinkling, water scene replenishing and the like of a building, and if tap water is used, a large amount of running cost is required, and a large amount of drinking water resources are wasted.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for collecting and purifying rainwater around a building, which can reduce the loss of rainwater in a building site, improve the water storage capacity of the site, and purify the collected rainwater through a series of rainwater purification measures, thereby reducing the waste of water resources.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for collecting and purifying rainwater around a building, which comprises the following steps: collecting and gathering roof rainwater, surface rainwater and underground rainwater, wherein the gathered rainwater is connected to a safe flow dividing well through a rainwater gathering pipe, the safe flow dividing well is connected with a flow discarding filter device, the flow discarding filter device is connected with a valve well, and the valve well is connected with a rainwater collecting pool;
pumping rainwater in the rainwater collection tank through an absorption bell mouth, then pumping the rainwater into a sand filter tank through a rainwater recycling pressurization pump, putting a coagulant into the sand filter tank by a coagulation dosing device to mix with the rainwater, enabling the water discharged from the sand filter tank to sequentially enter a microporous filter and an ultrafiltration filter, connecting a clean water end of the ultrafiltration filter to a rainwater recycling clean water tank, and connecting the rainwater recycling clean water tank to a back flush end of the ultrafiltration filter through a back flush pump;
And step three, conveying water in the clean water tank into a waterscape pool to present a static waterscape, wherein a connecting belt is arranged between the waterscape pool and a building, the connecting belt is of a water permeable structure, a water storage groove is arranged below the connecting belt, a flow guide pipe is arranged in the water storage groove, and the flow guide pipe is connected to a rainwater collecting pipe.
As a preferred technical scheme, in the first step, a sludge discharge pump is arranged at the bottom of the rainwater collecting pool, a water inlet of the rainwater collecting pool is formed in the upper portion of the rainwater collecting pool, and an overflow port is formed in the top of the rainwater collecting pool.
As the preferred technical scheme, the sludge discharge pump is started and after the sludge discharge is finished, the rainwater recycling pressure pump is started.
In the second step, a disinfectant is added into the clean water end of the ultrafiltration filter through a disinfection device, and a turbidity online monitoring device and a residual chlorine online monitoring device are arranged at the clean water end of the ultrafiltration filter.
As a preferred technical scheme, when any one monitoring value of the turbidity online monitoring device and the residual chlorine online monitoring device exceeds a standard value, a backwashing pump is started to perform backwashing on the ultrafiltration filter.
According to the preferable technical scheme, the clean water end of the ultrafiltration filter is connected with the drug washing water tank through a valve, the drug washing water tank is connected with the drug washing filter, the drug washing filter is connected with the ultrafiltration filter, a tap water replenishing port is formed in the drug washing water tank, when rainwater is in shortage in the clean water tank for reuse, the tap water replenishing port of the drug washing water tank continuously replenishes water, a part of water in the drug washing water tank flows into the backwashing end of the ultrafiltration filter, and a part of water flows into the ultrafiltration filter through the drug washing filter to perform backwashing on the ultrafiltration filter.
In the second step, the rainwater recycling clean water tank comprises a first clean water tank and a second clean water tank, and the effective volume of the first clean water tank is18m3The effective volume of the second clear water tank is 9m3The first clear water tank is connected with a reclaimed water pipeline, the second clear water tank is connected with a waterscape pool, and the effective volume of the rainwater collecting pool is 200m3。
According to the preferable technical scheme, the first clean water tank is connected with a tap water replenishing pipeline, the first clean water tank and the second clean water tank are communicated through a pipeline with a valve, when any one clean water tank reaches a set low water level, the rainwater recycling pressure pump and the filtering equipment are started to purify rainwater, when the rainwater collecting pool and the clean water tank are both in the low water level, the tap water replenishing pipeline is opened to replenish water, and when the first clean water tank and the second clean water tank are both in the high water level, the rainwater recycling pressure pump is closed.
As a preferable technical solution, in the third step, the surface of the connecting belt is lower than the elevation of the road surface and higher than the elevation of the surface of the waterscape pond.
Compared with the prior art, the invention has the following beneficial effects:
(1) the static waterscape design simulates the circulation process of natural rainwater, and starts from three stages of surface runoff collection, a transmission and purification way and a rainwater storage system, rainwater is fully utilized as a water source of the waterscape, so that a set of complete waterscape system is formed, the later maintenance and management cost is reduced, and the static waterscape design has economic significance.
(2) The invention can improve the humidity and microclimate of the soil and air around the building, reduce the urban heat island effect, create a comfortable office environment, and enrich the landscape types and the space levels of the residential areas by implementing the landscape measures related to the rainwater utilization.
(3) In the invention, rainwater is collected by a rainwater bank after being subjected to different collection ways and preliminary purification and filtration. The rainwater bank is a mode combining rainwater storage and landscape water body construction, and is designed in a mode of combining a clear water recycling tank and a mirror surface waterscape, wherein the clear water recycling tank is mainly used for rainwater short-time storage and regulation, and the mirror surface waterscape is mainly used for rainwater long-time storage and landscape display.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of the rainwater collection and purification method of the present invention.
FIG. 2 is a flow chart of the rainwater purification treatment according to the present invention.
Fig. 3 is a schematic structural view of the rainwater collecting tank of the present invention.
Fig. 4 is a schematic structural view of the first clean water tank of the present invention.
Fig. 5 is a schematic structural view of a second clean water tank of the present invention.
FIG. 6 is a schematic view of the structure of the waterscape pool and the connecting belt of the present invention.
Wherein the reference numerals are specified as follows: a connecting belt 1, a waterscape pool 2, a basement roof 3, a waterproof coating film 4, a bottom waterproof coiled material 5, a lower waterproof coiled material 6, an upper waterproof coiled material 7, fiberglass cloth 8, a bottom plate 9, a reinforced concrete structural slab 10, a waterproof mortar layer 11, a grid ditch cover plate 12, a cobble layer 13, a hydrophobic structural slab 14, geotextile 15, a soil rammed layer 16, a gravel cushion layer 17, supporting angle steel 18, a high polymer waterproof layer 19, a cement mortar bonding layer 20, a stone facing 21, a safe diversion well 22, a rainwater gathering pipe 23, an overflow pipe 24, a drainage filtering device 25, a valve well 26, a rainwater collecting pool 27, a sludge discharge pump 28, an overflow port 29, a rainwater recycling pressure pump 30, a concrete dosing device 31, a sand filter tank 32, a microporous filter 33, an ultrafiltration filter 34, a pesticide washing water tank 35, a pesticide washing filter 36, a disinfection device 37, a turbidity online monitoring device 38, a residual chlorine online monitoring device 39, a residual chlorine online monitoring device, a water level monitoring device, a, A first clean water tank 40, a second clean water tank 41, a back washing pump 42, a tap water replenishing port 43 and a lighting lamp 44.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without inventive step, are within the scope of the present invention.
The present embodiment provides a method for constructing a characteristic static waterscape structure of a building, and is explained by taking a newly developed bank headquarters building in Shanghai as an example.
The newly developed large-area building and hard pavement of the bank headquarters cover the original natural soil layer, and the application of some waterproof pavement materials replaces the natural soil surface. If no proper measures are taken, the natural infiltration of rainwater can be prevented, the natural conversion of surface water to underground water is influenced, and rainwater resources are lost, so that the design principle of green ecology of a building of a headquarter of a newly developed bank and the value concept of sustainable development of the newly developed bank are violated. Meanwhile, the large amount of water is consumed for the flushing of the headquarters building garage, greening irrigation, road watering, waterscape water replenishing and the like, and if tap water is used, the operation cost is high, and the waste of a large amount of drinking water resources is caused. The annual precipitation of Shanghai city is about 1271.9mm, the rainfall is abundant, and favorable conditions are provided for rainwater collection.
The rainwater collecting and purifying method comprises three aspects of a water source utilization way, rainwater transmission and purification and a rainwater storage system, and comprises the following specific steps:
step one, collecting and collecting roof rainwater, surface rainwater and underground rainwater, and storing the collected rainwater in a rainwater collecting tank 27.
The large catchment area of the roof of the headquarters building and the large runoff quantity generated are important sources for collecting rainwater. The content of pollutants in roof rainwater is relatively low, and the resource utilization value is high. The roof rainwater can be utilized in two modes, one mode is that rainwater on a common roof is collected, the other mode is that the rainwater on the common roof is collected, the roof of a headquarters building is built into a roof garden, compared with a quick drainage mode for collecting rainwater on the common roof, the green roof is safer, and the green structure of the roof can accumulate rainwater and reduce rainwater runoff. This embodiment collects the rainwater as the raw water through setting up 87 type rainwater hoppers on tower roof, skirt house roof, and the rainwater after collecting gathers to rainwater collecting tank 27 in through the pipeline.
The surface runoff formed by rainwater in the headquarters building mainly comprises rainwater runoff generated by a hard ground and a landscape green land, and the rainwater is introduced into the rainwater collecting tank 27 by mainly adopting a water pipe or a groove aiming at the surface runoff.
In conventional building design, rainwater penetrating into the ground is often drained away by connecting to a drainage blind ditch and a water delivery pipe of a municipal pipeline. In this embodiment, the underground rainwater is collected by the blind drain and the water pipe and guided into the rainwater collecting tank 27.
And step two, performing rainwater purification treatment in the rainwater collection tank 27 to obtain clear water.
In the process of rainwater formation and falling, soluble gas, metal ions, suspended particles and other harmful substances in the atmosphere can be mixed into rainwater, the rainwater on the roof can be polluted to different degrees under the influence of roof materials, pollutants in surface runoff mainly come from scouring of the rainwater in the process of transmission movement to the surface of the ground, and accordingly surface sediments can also influence the quality of the rainwater. In order to ensure the quality of water and perfect mirror effect, safe and reasonable purification measures are required to be taken to purify the rainwater. In this embodiment, the purification process of rainwater is as follows: and the rainwater in the step two is collected and then is connected to a safe diversion well 22 through a rainwater collection pipe 23, the safe diversion well 22 is arranged outdoors downstairs of a headquarters building, an overflow pipe 24 is arranged in the safe diversion well 22, and the overflow pipe 24 has the function of directly discharging the rainwater from the overflow pipe 24 when the water flow is excessively large instantly. The safe flow-dividing well 22 is connected with a flow-discarding filter device 25, and is used for discarding initial rainwater and large particle impurities, the flow-discarding filter device 25 is connected with a valve well 26, the valve well 26 is connected with a rainwater collecting tank 27, the valve well 26 is used for cutting off a valve of a water inlet pipe when the liquid level in the rainwater collecting tank 27 reaches the highest liquid level, and rainwater is directly discharged to an outdoor rainwater pipe network. The rainwater collecting tank 27 is constructed of concrete and has Effective volume of 200m3The highest water level is 3.6m, and decorative materials are paved outside the concrete tank body. Wherein, the water inlet of rainwater collecting tank 27 sets up the upper portion at rainwater collecting tank 27, and this kind of mode of setting can prevent to break away the sedimentary silt in rainwater collecting tank 27 bottom when rainwater gets into rainwater collecting tank 27. The inside two sludge pumps 28 that are provided with of rainwater collecting tank 27, one with one be equipped with, regularly open and collect sludge pump 28, the sedimentary silt in the clearance rainwater collecting tank 27, the top of rainwater collecting tank 27 is provided with overflow mouth 29, is connected to outdoor rainwater pipe network. The rainwater to be purified in the rainwater collecting pool 27 is sucked through the absorption bell mouth and then enters the sand filtration tank 32 through the rainwater recycling pressure pump 30, the sludge discharge pump 28 is started and sludge discharge is completed, then the rainwater recycling pressure pump 30 is started, simultaneously, a coagulant adding device 31 is used for adding a coagulant into the sand filtration tank 32 to be mixed with the rainwater, the water discharged from the sand filtration tank 32 sequentially enters the microporous filter 33 and the ultrafiltration filter 34, and the concentrated water end of the ultrafiltration filter 34 is discharged or reflows to the rainwater collecting pool 27 for cyclic purification treatment. In order to ensure the water outlet safety, a disinfectant is added to the clean water end of the ultrafiltration filter 34 through a disinfection device 37, meanwhile, a turbidity online monitoring device 38 and a residual chlorine online monitoring device 39 are arranged at the clean water end to monitor the quality of produced water, and when the water quality is poor, the ultrafiltration filter 34 is subjected to back flushing. The clear water end of the ultrafiltration filter 34 is connected to a first clear water tank 40 and a second clear water tank 41, the first clear water tank 40 having an effective volume of 18m 3The water outlet pipe is connected with a reclaimed water pipeline for greening watering and garage washing. The effective volume of the second clear water tank 41 is 9m3And the water outlet pipe is connected with a waterscape machine room for supplying water for special waterscape. The first clear water tank 40 is connected with a tap water replenishing pipeline, and the first clear water tank 40 is communicated with the second clear water tank 41 through a pipeline with a valve. When any clear water tank reaches a set low water level, the rainwater recycling pressure pump 30 and the filtering equipment are started to purify rainwater, and when the rainwater collecting tank 27 and the clear water tank are both at the low water level, a tap water replenishing pipe is opened to replenish water. When the first clean water tank 40 and the second clean water tank 41 are both at a high water level, the filtering apparatus stops operating.
Meanwhile, the first clean water tank 40 is connected with the ultrafiltration filter 34 through a backwash pump 42, the clean water end of the ultrafiltration filter 34 is connected with the chemical washing water tank 35 through a valve, the chemical washing water tank 35 is connected with the chemical washing filter 36, the chemical washing filter 36 is connected with the ultrafiltration filter 34, and the chemical washing water tank 35 is provided with a tap water replenishing port 43.
The backwash process of the ultrafiltration filter 34 is as follows:
under normal conditions: when the turbidity online monitoring device 38 and the residual chlorine online monitoring device 39 detect that the water quality is poor, the ultrafiltration filter 34 is backwashed, water in the first clean water tank 40 and the first clean water tank 40 is connected to the ultrafiltration filter 34 through the backwash pump 42, clean water is stored in the chemical washing water tank 35, a bactericide is added into the ultrafiltration filter 34 through the chemical washing filter 36, and water after backwashing of the ultrafiltration filter 34 is discharged into an outdoor rainwater pipe network.
When the first clean water tank 40 and the second clean water tank 41 are in water shortage condition: the first clean water tank 40 is connected with a tap water replenishing pipeline to replenish water into the first clean water tank, a tap water replenishing port 43 on the chemical washing water tank 35 continuously replenishes water, and the water in the chemical washing water tank 35 flows into the ultrafiltration filter 34 through the chemical washing filter 36 to backwash the ultrafiltration filter 34.
Step three, storing clear water in a rainwater recycling clear water tank; conveying the water in the clear water tank into a waterscape pool 2 to present a static waterscape; the waterscape pool 2 is arranged around a building, a connecting belt 1 is arranged between the waterscape pool 2 and the building, the connecting belt 1 is of a water permeable structure, a water storage groove is arranged below the connecting belt 1, a flow guide pipe is arranged in the water storage groove, and the flow guide pipe is connected to the rainwater collecting pipe 23. The surface of the connecting belt 1 is lower than the elevation of the road surface and higher than the elevation of the surface of the waterscape pool 2. The connecting belt 1 is arranged, so that on one hand, the rainwater on the ground surface is prevented from directly flowing into the waterscape pool 2 to pollute the water body; on the other hand, can collect the earth's surface rainwater, realize the rainwater circulation.
During the construction of the waterscape pool 2, the narrowest part of the waterscape plane is selected as a partition point, the waterscape pool 2 is divided into 5 areas for construction, the areas can be constructed in parallel after being partitioned, the construction period is shortened, and the construction of each area block comprises the following steps:
S1, laying a bottom plate 9; the bottom plate 9 is made of fine stone concrete plates. The strength grade of the fine stone concrete is C20, the bidirectional ribs with phi 6@200 are internally matched, the laying thickness is not more than +/-0.5% of the designed thickness, the thickness of the thinnest part is 50mm, the base layer is leveled and laid at the uneven or gradient position, and the contraction joint is arranged between the fine stone concrete slab and the fine stone concrete slab, so that irregular cracks cannot be generated when the fine stone concrete slab contracts. Before the bottom plate 9 is paved, a waterproof coating film 4, a lower waterproof coiled material 6, an upper waterproof coiled material 7 and glass fiber cloth 8 are paved in sequence. The waterproof coating 4 is a polyurethane waterproof coating 4 with the thickness of 2mm, the lower waterproof coiled material 6 is an ethylene propylene diene monomer waterproof coiled material with the thickness of 1.5mm, and the upper waterproof coiled material 7 is an ethylene propylene diene monomer root-resistant waterproof coiled material with the thickness of 1.5 mm. The bottom plate 9 is laid to a thickness of 200mm at the position of the basement top plate 3, and the bottom plate 9 is laid to a thickness of 350mm at the position of the non-basement top plate 3 to prevent uneven settlement. The basement top plate 3 is of a self-waterproof structure, and the waterproof grade is P6.
And S2, laying the hydrophobic structure plate 14.
S3, laying a rammed earth layer 16, and arranging a geotextile 15 between the rammed earth layer 16 and the hydrophobic structure plate 14.
And S4, paving the gravel cushion layer 17.
S5, paving a reinforced concrete structure plate 10 with the thickness of 60 mm; one side of the reinforced concrete structure plate 10 close to the connecting band 1 is protruded to form a pool structure.
S6, paving a cement mortar bonding layer 20, and paving a high polymer waterproof layer 19 with the thickness of 4mm before paving the cement mortar bonding layer 20. The bulge of the cement mortar bonding layer 20 close to one side of the connecting strip 1 is positioned at the side part to form a supporting block of the stone facing 21 for vertical paving, the distance between the supporting block and the bottom of the cement mortar bonding layer 20 is equal to the thickness of the stone facing 21, and the length of the supporting block is less than or equal to the thickness of the stone facing 21.
And S7, paving the stone overlay 21. The stone facing 21 is made of basalt, belongs to a low-radiation and environment-friendly product, is black and black, has a condensed and elegant tone, accumulates a 100mm water layer on the stone facing 21, and reflects a tower with a main white tone on black paving to form a beautiful mirror surface water scene.
The construction of the connecting strip 1 comprises the following steps:
step 1, paving a bottom plate 9; the bottom plate 9 is made of fine stone concrete plates. The strength grade of the fine stone concrete slab is C20, the bidirectional ribs with phi 6@200 are internally matched, the laying thickness is not more than +/-0.5% of the designed thickness, the thickness of the thinnest part is 50mm, the base layer is leveled and laid at the uneven or gradient position, and the contraction joint is arranged between the fine stone concrete slab and the fine stone concrete slab, so that irregular cracks cannot be generated when the fine stone concrete slab contracts. The bottom plate 9 is made of fine stone concrete plates. Before the bottom plate 9 is paved, a waterproof coating film 4, a bottom waterproof coiled material 5, a lower waterproof coiled material 6, an upper waterproof coiled material 7 and glass fiber cloth 8 are paved in sequence. The waterproof coating 4 is a polyurethane waterproof coating 4 with the thickness of 2mm, the bottom waterproof coiled material 5 is an ethylene propylene diene monomer waterproof coiled material with the thickness of 1.5mm, the lower waterproof coiled material 6 is an ethylene propylene diene monomer waterproof coiled material with the thickness of 1.5mm, and the upper waterproof coiled material 7 is an ethylene propylene diene monomer root-puncture-resistant waterproof coiled material with the thickness of 1.5 mm. The bottom plate 9 is laid to a thickness of 200mm at a position at the top plate 3 of the basement, and the bottom plate 9 is laid to a thickness of 350mm at a position at the top plate 3 of the non-basement.
Step 3, paving a waterproof mortar layer 11 with the thinnest position of 20 mm; one side of the waterproof mortar layer 11 close to the waterscape pool 2 is raised, and the height of the protrusion is smaller than that of the protrusion of the reinforced concrete structural slab 10. After the waterproof mortar layer 11 is laid, a supporting angle steel 18 is installed on one side of the reinforced concrete structural slab 10, the supporting angle steel 18 is arranged on the top of the waterproof mortar layer 11, and the supporting angle steel 18 is used for placing the grating trench cover plate 12.
And 4, arranging a grid ditch cover plate 12 at the top of the water storage groove. The grid trench cover 12 is made of 316 stainless steel.
And 5, paving a cobble layer 13 to form the connecting belt 1, and arranging an illuminating lamp 44 on the cobbles.
The mirror effect presented by the characteristic waterscape of the building of the headquarters of the newly developed bank is mapped to form a peripheral beautiful landscape, on one hand, the collected and purified rainwater is used as a water replenishing source, so that the method is economic and environment-friendly, and perfectly embodies the value concept of green ecology and sustainable development of the newly developed bank; on the other hand, the construction scheme is reasonable in arrangement, so that the construction period can be shortened, and the presentation effect can be guaranteed.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and that such modifications and improvements are within the spirit and scope of the invention.
Claims (8)
1. A method for collecting and purifying rainwater around a building is characterized by comprising the following steps:
collecting and gathering roof rainwater, surface rainwater and underground rainwater, wherein the gathered rainwater is connected to a safe flow dividing well through a rainwater gathering pipe, the safe flow dividing well is connected with a flow discarding filter device, the flow discarding filter device is connected with a valve well, and the valve well is connected with a rainwater collecting pool;
step two, pumping rainwater in the rainwater collection pool through an absorption bell mouth, then pumping the rainwater into a sand filter tank through a rainwater recycling pressurization pump, putting a coagulant into the sand filter tank by a coagulation dosing device to mix with the rainwater, enabling the effluent of the sand filter tank to sequentially enter a microporous filter and an ultrafiltration filter, connecting a clear water end of the ultrafiltration filter to a rainwater recycling clear water tank, and connecting the rainwater recycling clear water tank to a back flush end of the ultrafiltration filter through a back flush pump;
conveying water in the clean water tank into a waterscape pool to present a static waterscape, wherein the waterscape pool is arranged around a building, a connecting belt is arranged between the waterscape pool and the building, the connecting belt is of a water permeable structure, a water storage groove is arranged below the connecting belt, a flow guide pipe is arranged in the water storage groove, and the flow guide pipe is connected to a rainwater collecting pipe; the top of the water storage groove is provided with a grid groove cover plate, cobblestone layers are laid to form a connecting belt, the cobblestones are provided with lighting lamps, and the surface of the connecting belt is lower than the elevation of the road surface and higher than the elevation of the surface of the waterscape pool.
2. The method for collecting and purifying the rainwater around the building as claimed in claim 1, wherein in the first step, a dredge pump is provided at the bottom of the rainwater collecting pool, a water inlet of the rainwater collecting pool is provided at the upper part of the rainwater collecting pool, and an overflow port is provided at the top of the rainwater collecting pool.
3. The method for collecting and purifying rainwater around the building as claimed in claim 2, wherein the rainwater recycling pressure pump is started after the sludge discharge pump is started and the sludge discharge is completed.
4. The method for collecting and purifying rainwater around a building as claimed in claim 1, wherein in the second step, the disinfectant is added to the clear water end of the ultrafiltration filter through a disinfection device, and the turbidity on-line monitoring device and the residual chlorine on-line monitoring device are arranged at the clear water end of the ultrafiltration filter.
5. The method for collecting and purifying rainwater around a building as claimed in claim 4, wherein when any one of the turbidity on-line monitoring device and the residual chlorine on-line monitoring device exceeds a standard value, the backwashing pump is started to backwash the ultrafiltration filter.
6. The method of claim 5, wherein the clear water end of the ultrafiltration filter is connected to the chemical washing tank through a valve, the chemical washing tank is connected to the chemical washing filter, the chemical washing filter is connected to the ultrafiltration filter, the chemical washing tank is provided with a tap water replenishing port, when rainwater is in short supply to the clear water tank for reuse, the tap water replenishing port of the chemical washing tank continuously replenishes water, a part of water in the chemical washing tank flows into the back washing end of the ultrafiltration filter, and a part of water flows into the ultrafiltration filter through the chemical washing filter, so as to back wash the ultrafiltration filter.
7. The method for collecting and purifying rainwater around a building of claim 1, wherein in the second step, the rainwater reuse clear water tank comprises a first clear water tank and a second clear water tank, and the effective volume of the first clear water tank is 18m3The effective volume of the second clear water tank is 9m3The first clear water tank is connected with a reclaimed water pipeline, the second clear water tank is connected with a waterscape pool, and the effective volume of the rainwater collecting pool is 200m3。
8. The method for collecting and purifying rainwater around a building according to claim 7, wherein the first clean water tank is connected with a tap water replenishing pipeline, the first clean water tank and the second clean water tank are communicated through a pipeline with a valve, when any one clean water tank reaches a set low water level, the rainwater recycling pressure pump and the filtering device are started to purify the rainwater, when the rainwater collecting pool and the clean water tank are both at the low water level, the tap water replenishing pipe is opened to replenish the rainwater, and when the first clean water tank and the second clean water tank are both at a high water level, the rainwater recycling pressure pump is closed.
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| CN210151811U (en) * | 2019-04-19 | 2020-03-17 | 江苏工程职业技术学院 | Landscape type overground rainwater collecting device |
| CN210869121U (en) * | 2019-05-24 | 2020-06-30 | 宁波丰邦海绵城市科技有限公司 | Landscape system for collecting and recycling rainwater |
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| US20040040598A1 (en) * | 2002-08-30 | 2004-03-04 | Zimmerman Robert L. | Rainwater recovery system |
| CN102505728A (en) * | 2011-11-03 | 2012-06-20 | 云南高科环境保护科技有限公司 | Complete technology for resource utilization of rainwater |
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