CN106638918A - Construction method for sponge city rainwater collection system - Google Patents
Construction method for sponge city rainwater collection system Download PDFInfo
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- CN106638918A CN106638918A CN201611097668.8A CN201611097668A CN106638918A CN 106638918 A CN106638918 A CN 106638918A CN 201611097668 A CN201611097668 A CN 201611097668A CN 106638918 A CN106638918 A CN 106638918A
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- retaining
- well
- tank
- clarifier
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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
-
- 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
- E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
-
- 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
Abstract
The invention discloses a construction method for a sponge city rainwater collection system. The system comprises the steps of a, excavation of foundation pit; b, base treatment; c, water purification pool building; d, water storage tank being in place; e, water seepage base course paving; f, watering and maintenance. According to the construction method for the sponge city rainwater collection system, the construction is easy, the difficulty is low, the construction quality is easy to control, the construction cost is low, the referred construction equipment is little, the permeation effect is good, the water-holding capacity is strong, collected rainwater is purified and put into secondary use, the resource utilization efficiency of the rainwater is greatly improved, waste is turned into wealth, and the problem of scanty water resources is relieved.
Description
Technical field
The invention belongs to sponge city water resource utilizes field, more particularly to a kind of sponge urban rainwater collection system is applied
Work method.
Background technology
With the propulsion of Urbanization Construction, increasing for hardened ground changes original water regime, causes rainfall runoff
Increase, the frequent ponding in road surface, the normal large area ponding of urban Jing, while rain flood peak value becomes big, soil moisture content is reduced, underground
Water level decreasing phenomenon aggravation etc..In addition, China's Urban Water Shortage Problem of Cities is increasingly serious, and northern area resource-type water shortage, southern area
Water quality type water shortage.In such a case, government puts forward the target for building " sponge city ", gives in each side such as policy, finances
To support.
Sponge city, as the term suggests, city is such as sponge, in duration of raining, can quickly absorb, accumulate, permeating,
Purifying rainwater, reduces rainwater and forms runoff, recharge of groundwater；Simultaneously when not raining, by a series for the treatment of measures and supporting
Pipe network facilities, the water of accumulation is used, so as to allow rainwater resource to be preferably dissolved in the supply and drain water system in city.Make
Rational sponge urban water system, can both be effectively protected the original ecosystem in city, it is also possible to slowly recover original
The destroyed ecosystem, simultaneously for the Development control area of whole urbanization impact drop to it is lower.
Traditional sponge urban construction pattern, is everywhere hard surface.Whenever heavy rain, " the ash such as pipe duct, pumping plant is relied primarily on
Color " facility carrys out draining, and with " quick to exclude " and " end concentration " main planning and design concept is controlled to, and rainwater mainly passes through draining
Facility is drained, it is impossible to penetrate into underground, is often resulted in and is met rain flooded, and drought and waterlogging racing does not meet the requirement of sponge urban construction.
The content of the invention
Present invention aim at solving above-mentioned technical problem present in prior art, there is provided a kind of sponge urban rainwater is received
The construction method of collecting system, construction is simple, and difficulty is low, and construction quality is easily controllable, and construction cost is low, the construction equipment being related to
Few, osmotic effect is good, and water-holding capacity is strong, by the rainwater purification collected, and puts into the secondary money for using, substantially increasing rainwater
Source utilization ratio, turns waste into wealth, and alleviates the problem of water resources shortage.
In order to solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of construction method of sponge urban rainwater collection system, it is characterised in that comprise the steps：
(a) excavation of foundation pit：According to design working drawing, coordinated by the way of artificial grooving using excavator, excavation pit is to setting
Meter absolute altitude, clears up bottom of foundation ditch, and then the bullet line of ink marker is levelling, keeps the gradient of bottom of foundation ditch 2%～3%, controls foundation pit side-wall
Perpendicularity be respectively less than 1%, and do support protection, in the case where bottom of foundation ditch is made, grey wire tag, marks retaining clarifier-tank construction area,
Ensure foundation ditch flatness and perpendicularity, prevent foundation ditch from occurring subsiding, the generation of the phenomenon that come down, so as to ensure construction quality, construct
Region division clearly, improves efficiency of construction；
(b) base treatment：Waterproofing geomembrane is laid in the grey coil of mark, is fixed with cement nail every 5～8m,
Then the original soil of 150～200mm is backfilled on waterproofing geomembrane, and rolls compacting back and forth, then compacted density ＞ 92% is layered
Casting concrete bed course, total height is 250～300mm, reserved 100 between concrete cushion edge and waterproofing geomembrane～
The lap of splice of 150mm, every the reserved ventilating grooves of 10～15m on concrete cushion, and lays from below to up in ventilating groove
100～150mm thickness ventilation anti-seepage sand and 100～150mm thick pervious concrete, every layer of uniform compaction, concrete cushion is poured
After the completion of, surface wooden float rubs flat with the hands, and is covered in 12h, conserves 7～8 days, it is ensured that the structure of concrete cushion is strong
Degree, permeability and heat endurance, support baseboard based on concrete cushion, bearing capacity has to comply with design requirement, coagulation
Soil padding also acts as buffer action, prevents ground surface environment from affecting foundation ditch foundation structure；
C () retaining clarifier-tank is built by laying bricks or stones：After concrete cushion acceptance(check), retaining clarifier-tank is built by laying bricks or stones, building the pond body phase by laying bricks or stones
Between, water string is attached separately on water inlet and delivery port, then hammering compacting is arranged on collector pipe on water inlet, will
Drainpipe is arranged on delivery port, and is enclosed in interface winding 2～3 with waterstop, and according to positioning convex the side of locating slot is directed at
Formula loads water filtration separator in retaining well, then injects cement mortar into locating slot, while the slurries for overflowing locating slot are cleared up, from
Pond body side starts to lay retaining well, and brushing cement mortar in each outside wall surface of retaining well, adjacent retaining well is brought into close contact, retaining
After well laying is finished, cover plate and liquid level well are poured successively, liquid level well bassets 50～100mm, then lays on the cover board anti-
Water geomembrane, by waterproofing geomembrane whole cover plate is paved with, and evens up fixation, and reserves the lap of splice of 100～150mm, then tightly
Waterproofing geomembrane is enclosed in patch pond body outer wall laying one, then by the waterproofing geomembrane under the circle waterproofing geomembrane and concrete cushion,
Waterproofing geomembrane on cover plate completes overlap joint process, and retaining clarifier-tank gets up rain water-harvesting, no as the container for collecting rainwater
Ground space is occupied, filters synchronous with purification, antiseepage is with vaporization prevention simultaneously, net by concrete cushion, retaining with waterproofing geomembrane
In change pond and cover plate are wrapped in, prevent original soil around from invading, the squeezing action of surrounding original soil will not be subject to, play structural defence work
With；
D () water tank is in place：Water tank and suction pump are separately fixed on ground, the water side connection retaining of suction pump
Tank, each road drainpipe is assembled on many siphunculus, then the water side of many siphunculus is connected into the water inlet end of suction pump, and suction pump will store
The rainwater collected in water purifying tank is pumped into water tank and stores, for pouring crops, the daily water consumption of landscape plant, washing
Parking lot water, road rinse, flush the toilet and some other non-domestic water purposes, substantially increase the recycling effect of rainwater
Rate, turns waste into wealth, and alleviates the problem of water resources shortage, reduces soil erosion, to building the ecological agriculture, ecocity, protection
Environment all has very great meaning；
The laying of (e) infiltration basic unit：Retaining clarifier-tank and cover plate are buried with original soil backfill, is often filled out 200～300mm and is entered pedestrian
Work is tamped, then the laying infiltration basic unit on earthing face, the basic unit that seeps water be followed successively by from the bottom to top the thick coarse sands layers of 100～150mm,
The thick metalling of 200～250mm thick gravel layer and 100～150mm, coarse sands layer buries collector pipe, has laid rear vibration tamp,
Then screed-coat is laid on metalling, the screed-coat levelling compacting of sand is middle to both sides slope 1～1.5%, finally levelling
Water-permeable brick is staggeredly laid on layer, after water-permeable brick laying is finished, compacting is smooth, and rainwater permeates downwards, enters Infiltration water basic unit, in infiltration
Migrate in basic unit, can only downwards be permeated by hole, flow velocity is slow, and the time of staying is long, and coarse sands layer, gravel layer and metalling are all
There is adsorption capacity, the nitrogen in rainwater, phosphorus solid particle are adsorbed, dropped by the anaerobe of infiltration basic unit growth
Solution, purifying rainwater；Water-permeable brick has good gas permeability, water penetration, and rainwater can be enable rapidly to penetrate into underground, supplements ground
The soil moisture of table water and underground water, while with the effect for absorbing moisture and heat, so as to adjust the temperature of earth's surface local space
Humidity, and the tropical island effect in city is effectively solved, the pressure of municipal drainage and flood control, the dirt to preventing public waters can be alleviated
Dye and process sewage have good effect；
(f) water seasoning：After construction is finished, water-permeable brick, and water seasoning are covered with stack of rice straw, curing time is little more than 24
When, stack of rice straw moistening is ensured during maintenance, and forbid idler to trample, water seasoning can ensure the intensity of water-permeable brick, prevent
Crack, keeps the water penetration of water-permeable brick.
Further, abandoned stream screened well is buried in the range of foundation ditch periphery 2m in step (d), the water side of many siphunculus is accessed
The water inlet end of abandoned stream screened well, the water side of abandoned stream screened well connects the water inlet end of suction pump, from the rain that retaining clarifier-tank is collected
Water Jing drainpipes are entered in abandoned stream screened well, and the suspended particulate and rubbish thing remained in rainwater is eliminated by absorption so that rainwater
Effectively purified, improve the quality of rainwater, be pumped into water tank by drawing water, come into operation.
Further, in step (c) before the laying of retaining well, by retaining well unification water saturates, penetration period is 5～
6min, retaining well is piled up by hacking and is formed, and prevents retaining well from absorbing the moisture in cement mortar, causes cement not produce aquation mistake
Journey just solidifies in advance, substantially reduces mortar strength, with water saturates retaining well can be made to reach saturation state, prevents sending out for water suction phenomenon
It is raw.
Further, the specific practice of concrete cushion maintenance is to use covered rearing with plastic film concrete cushion in step (b), and
Water seasoning, ensures covering material moistening during maintenance, and forbids idler to trample or continue to construct thereon,
A kind of retaining clarifier-tank of the construction method for sponge urban rainwater collection system, it is characterised in that：Including pond
Body, retaining well, cover plate and water filtration separator, on retaining well, retaining well is evenly distributed in pond body cover plate, and water filtration separator is located at
In retaining well, treatment hole is evenly distributed with water filtration separator, positioning convex is symmetrically distributed with water filtration separator, it is symmetrical in retaining well
Locating slot is distributed with, locating slot matches with positioning convex, the side of retaining well is equipped with water-flowing trough, and the both sides of pond body set respectively
There are water inlet and delivery port；Retaining clarifier-tank easy construction, the efficiency high, as the container for collecting rainwater, rain water-harvesting are risen
Come, filter synchronous with purification, with vaporization prevention simultaneously, Stability Analysis of Structures is safe and reliable, prevents take up ground space, the rain of purification for antiseepage
Water can be used for various aspects, substantially increase the resource utilization efficiency of rainwater, turn waste into wealth, and alleviate asking for water resources shortage
Topic.
Further, annular protrusion is provided with the top of retaining well, between adjacent annular projection drainage channel, adjacent retaining is formed
Drainage channel between well is interconnected so that the moisture fallen on retaining well falls into the bottom of pond body along drainage channel, gathers
Collection gets up.
Further, cover plate is provided with liquid level well, and liquid level well penetrates cover plate, and liquid level well is connected with retaining well, is set on liquid level well
There is well lid, well lid is provided with leaking hole, and liquid level well facilitates the retaining situation that staff's timing is checked in retaining clarifier-tank, liquid level
It is too high, need to be drawn water, the setting of leaking hole facilitates the downward seepage of ground rainwater, reduces land drainage pressure.
Further, water inlet is provided with water string, and delivery port is provided with water string, and the water string is using flexible anti-
Jacket pipe, improves the water resistance inside and outside water inlet and inside and outside delivery port, and prevention collector pipe and drainpipe are subjected to displacement deformation.
Further, retaining well is in regular hexagon shape, and retaining gang of wells body forms alveolate texture, stablizes safe and reliable, do not account for
According to ground space, filter synchronous with purification, antiseepage is with vaporization prevention simultaneously.
The present invention has the advantages that as a result of above-mentioned technical proposal：
Construct in the present invention simple, difficulty is low, and construction quality is easily controllable, and construction cost is low, and the construction equipment being related to is few,
Osmotic effect is good, and water-holding capacity is strong, by the rainwater purification collected, reduces the secondary pollution of rainwater；Water-permeable brick is staggeredly laid,
Rainwater is permeated downwards rapidly, enter Infiltration water basic unit, migrate in infiltration basic unit, can only downwards be permeated by hole,
Flow velocity is slow, and the time of staying is long, and coarse sands layer, gravel layer and metalling have adsorption capacity, and the nitrogen in rainwater, phosphorus solid particle are entered
Row absorption, is degraded by the anaerobe of infiltration basic unit growth, purifying rainwater, the rainwater Jing coarse sands layers bottom after purification
Collector pipe flows into retaining clarifier-tank, and retaining clarifier-tank gets up rain water-harvesting as the container for collecting rainwater, prevents take up ground empty
Between, filtering synchronous with purification, the rainwater of collection simultaneously, is pumped into water tank and is stored by antiseepage with vaporization prevention by suction pump
Come, rinse, flush the toilet and some other non-lives for pouring crops, the daily water consumption of landscape plant, washing bay water, road
Water purposes is used, urban pavement discharge pressure is reduced, and by the rainwater purification collected, input is secondary to be used, and is substantially increased
The resource utilization efficiency of rainwater, turns waste into wealth, and alleviates the problem of water resources shortage.
The easy construction of retaining clarifier-tank, efficiency high in the present invention, only locating slot need to be directed at during construction according to positioning convex
Mode loads water filtration separator in retaining well, then injects cement mortar into locating slot so that water filtration separator is bonded and fixed at storage
It is reliable and stable in well, simple to operate, quick effective, the reduction of erection time；Water filtration separator plays a part of to block rainwater, and rainwater is only
Infiltration can downwards be continued by treatment hole, the fixed particle remained in rainwater is stopped on water filtration separator surface, it is impossible to fallen, point
From impurity；Retaining clarifier-tank as collect rainwater container, rain water-harvesting is got up, filter synchronous with purification, antiseepage with prevent
Simultaneously, Stability Analysis of Structures is safe and reliable, prevents take up ground space for evaporation.
Description of the drawings
Below in conjunction with the accompanying drawings the invention will be further described：
Fig. 1 is the structural representation of retaining clarifier-tank in the present invention；
Fig. 2 is the structural representation after retaining well is piled up in the present invention；
Fig. 3 is retaining well and the structural representation of water filtration separator connection in the present invention；
Fig. 4 is the structural representation of pond body in the present invention；
Fig. 5 is a kind of schematic flow sheet of the construction method of sponge urban rainwater collection system of the invention.
In figure：1- pond bodies；2- retaining wells；3- cover plates；4- water filtration separators；5- treatment holes；6- positioning convex；7- locating slots；
8- water-flowing troughs；9- water inlets；10- delivery ports；11- water strings；12- annular protrusions；13- drainage channels；14- liquid level wells；15-
Well lid；16- leaking holes.
Specific embodiment
As shown in Figures 1 to 5, it is a kind of construction method of sponge urban rainwater collection system of the invention, including following step
Suddenly：
(a) excavation of foundation pit：According to design working drawing, coordinated by the way of artificial grooving using excavator, excavation pit is to setting
Meter absolute altitude, clears up bottom of foundation ditch, and then the bullet line of ink marker is levelling, keeps the gradient of bottom of foundation ditch 2%～3%, controls foundation pit side-wall
Perpendicularity be respectively less than 1%, and do support protection, in the case where bottom of foundation ditch is made, grey wire tag, marks retaining clarifier-tank construction area,
Ensure foundation ditch flatness and perpendicularity, prevent foundation ditch from occurring subsiding, the generation of the phenomenon that come down, so as to ensure construction quality, construct
Region division clearly, improves efficiency of construction.
(b) base treatment：Waterproofing geomembrane is laid in the grey coil of mark, is fixed with cement nail every 5～8m,
Then the original soil of 150～200mm is backfilled on waterproofing geomembrane, and rolls compacting back and forth, then compacted density ＞ 92% is layered
Casting concrete bed course, total height is 250～300mm, reserved 100 between concrete cushion edge and waterproofing geomembrane～
The lap of splice of 150mm, every the reserved ventilating grooves of 10～15m on concrete cushion, and lays from below to up in ventilating groove
100～150mm thickness ventilation anti-seepage sand and 100～150mm thick pervious concrete, every layer of uniform compaction, concrete cushion is poured
After the completion of, surface wooden float rubs flat with the hands, and is covered in 12h, conserves 7～8 days, the specific practice of concrete cushion maintenance
It is to use covered rearing with plastic film concrete cushion, and water seasoning, covering material moistening is ensured during maintenance, and forbid idler to trample
Or continue to construct thereon, it is ensured that the structural strength of concrete cushion, permeability and heat endurance, concrete cushion is used as base
Plinth support baseboard, bearing capacity has to comply with design requirement, and concrete cushion also acts as buffer action, prevents ground surface environment from affecting base
Hole foundation structure.
C () retaining clarifier-tank is built by laying bricks or stones：After concrete cushion acceptance(check), retaining clarifier-tank, retaining clarifier-tank bag are built by laying bricks or stones
Pond body 1, retaining well 2, cover plate 3 and water filtration separator 4 are included, on retaining well 2, retaining well 2 is evenly distributed in pond body 1 cover plate 3,
Retaining well 2 is in regular hexagon shape, forms alveolate texture, stablizes safe and reliable.Water filtration separator 4 in the retaining well 2, drainage every
Be evenly distributed with treatment hole 5 on plate 4, water filtration separator 4 plays a part of to block rainwater, rainwater can only by treatment hole 5 downwards after
Continuous infiltration, the fixed particle of rainwater residual is being stopped on the surface of water filtration separator 4, it is impossible to is fallen, has been separated impurity.
Be symmetrically distributed with positioning convex 6 on water filtration separator 4, be symmetrically distributed with locating slot 7 in retaining well 2, locating slot 7 with it is fixed
Position raised 6 matches, and water filtration separator 4 is loaded retaining well 2 by the mode that only need to be directed at locating slot 7 according to positioning convex 6 during construction
Interior, simple to operate, easy construction, efficiency high are quick effective.The side of retaining well 2 is equipped with water-flowing trough 8, adjacent retaining well 2 it
Between water-flowing trough 8 be mutually communicated, expand the flow range of rainwater, keep activity.Pond body 1 is respectively provided on two sides with water inlet 9
With delivery port 10, water string 11 is equipped with water inlet 9 and delivery port 10, the water string 11 adopts soft waterproof casing,
The water resistance inside and outside water inlet 9 and inside and outside delivery port 10 is improved, prevention pipeline is subjected to displacement deformation.The top of retaining well 2 sets
There is annular protrusion 12, drainage channel 13 is formed between adjacent annular projection 12, the drainage channel 13 between adjacent retaining well 2 is mutual
Connection so that the moisture fallen on retaining well 2 falls into the bottom of pond body 1 along drainage channel 13, gathers together.Set on cover plate 3
There is liquid level well 14, liquid level well 14 penetrates cover plate 3, and liquid level well 14 is connected with retaining well 2, and liquid level well 14 is provided with well lid 15, well lid
15 are provided with leaking hole 16, and liquid level well 14 facilitates the retaining situation that staff's timing is checked in retaining clarifier-tank, and liquid level is too high
Then need to be drawn water, the setting of leaking hole 16 facilitates the downward seepage of ground rainwater, reduces land drainage pressure.
During pond body 1 is built by laying bricks or stones, water string 11 is attached separately on water inlet 9 and delivery port 10, hammering compacting, then
Collector pipe is arranged on water inlet 9, drainpipe is arranged on delivery port 10, and 2～3 are wound in interface with waterstop
Circle, loads water filtration separator 4 in retaining well 2 according to the mode that positioning convex 6 is directed at locating slot 7, then injects into locating slot 7
Cement mortar, while clearing up the slurries for overflowing locating slot 7, starts to lay retaining well 2 from the side of pond body 1, before retaining well 2 is laid,
It is 5～6min by the unification water saturates of retaining well 2, penetration period, retaining well 2 is piled up by hacking and formed, and prevents retaining well 2 from absorbing
Moisture in cement mortar, causes cement not produce hydration process and just solidifies in advance, substantially reduces mortar strength, uses water saturates energy
Make retaining well 2 reach saturation state, prevent the generation of water suction phenomenon.Brushing cement mortar in each outside wall surface of retaining well 2 is adjacent
Retaining well 2 is brought into close contact, and after the laying of retaining well 2 is finished, pours cover plate 3 and liquid level well 14 successively, and liquid level well 14 bassets 50
～100mm, then sets waterproofing geomembrane on the upper berth of cover plate 3, and waterproofing geomembrane is paved with into whole cover plate 3, evens up fixation, and reserves
The lap of splice of 100～150mm, is then close to the outer wall of pond body 1 laying one and encloses waterproofing geomembrane, then by the circle waterproofing geomembrane
Overlap joint is completed with the waterproofing geomembrane on the waterproofing geomembrane under concrete cushion, cover plate 3 to process, retaining clarifier-tank is used as collection
The container of rainwater, rain water-harvesting is got up, and prevents take up ground space, filters synchronous with purification, and antiseepage with vaporization prevention simultaneously, uses anti-
In water geomembrane is wrapped in concrete cushion, retaining clarifier-tank and cover plate 3, prevent original soil around from invading, surrounding will not be subject to
The squeezing action of original soil, plays structural defence effect.
D () water tank is in place：Water tank and suction pump are separately fixed on ground, the water side connection retaining of suction pump
Tank, each road drainpipe is assembled on many siphunculus, abandoned stream screened well is buried in the range of foundation ditch periphery 2m, by the water outlet of many siphunculus
The water inlet end into abandoned stream screened well is terminated, the water side of abandoned stream screened well connects the water inlet end of suction pump, receives from retaining clarifier-tank
The rainwater Jing drainpipes of collection are entered in abandoned stream screened well, and the suspended particulate and rubbish thing remained in rainwater is eliminated by absorption, is made
Obtain rainwater effectively to be purified, improve the quality of rainwater, be pumped into water tank by drawing water and stored, for pouring agriculture
Crop, the daily water consumption of landscape plant, washing bay water, road rinse, flush the toilet and some other non-domestic water purposes, significantly
The resource utilization efficiency of rainwater is improve, is turned waste into wealth, alleviate the problem of water resources shortage, soil erosion is reduced, to building
If the ecological agriculture, ecocity, environmental protection all have very great meaning.
The laying of (e) infiltration basic unit：Retaining clarifier-tank and cover plate 3 are buried with original soil backfill, often filling out 200～300mm is carried out
Hand compaction, then lays infiltration basic unit on earthing face, and the basic unit that seeps water is followed successively by from the bottom to top the thick coarse sands of 100～150mm
The thick metalling of layer, 200～250mm thick gravel layer and 100～150mm, coarse sands layer buries collector pipe, has laid rear vibro-rammer
It is real, screed-coat is then laid on metalling, the screed-coat levelling compacting of sand, centre finally exists to both sides slope 1～1.5%
Water-permeable brick is staggeredly laid on screed-coat, after water-permeable brick laying is finished, compacting is smooth, and rainwater permeates downwards, enters Infiltration water basic unit,
Migrate in infiltration basic unit, can only downwards be permeated by hole, flow velocity is slow, and the time of staying is long, coarse sands layer, gravel layer and rubble
Layer has adsorption capacity, and the nitrogen in rainwater, phosphorus solid particle are adsorbed, and is carried out by the anaerobe of infiltration basic unit growth
Degraded, purifying rainwater；Water-permeable brick has good gas permeability, water penetration, and rainwater can be enable rapidly to penetrate into underground, supplements
The soil moisture of surface water and groundwater, while with the effect for absorbing moisture and heat, so as to adjust earth's surface local space
Humiture, and the tropical island effect in city is effectively solved, the pressure of municipal drainage and flood control can be alleviated, to preventing public waters
Pollution and process sewage have good effect.
(f) water seasoning：After construction is finished, water-permeable brick, and water seasoning are covered with stack of rice straw, curing time is little more than 24
When, stack of rice straw moistening is ensured during maintenance, and forbid idler to trample, water seasoning can ensure the intensity of water-permeable brick, prevent
Crack, keeps the water penetration of water-permeable brick.
Construct in the present invention simple, difficulty is low, and construction quality is easily controllable, and construction cost is low, and the construction equipment being related to is few,
Osmotic effect is good, and water-holding capacity is strong, by the rainwater purification collected, reduces the secondary pollution of rainwater；Water-permeable brick is staggeredly laid,
Rainwater is permeated downwards rapidly, enter Infiltration water basic unit, migrate in infiltration basic unit, can only downwards be permeated by hole,
Flow velocity is slow, and the time of staying is long, and coarse sands layer, gravel layer and metalling have adsorption capacity, and the nitrogen in rainwater, phosphorus solid particle are entered
Row absorption, is degraded by the anaerobe of infiltration basic unit growth, purifying rainwater, the rainwater Jing coarse sands layers bottom after purification
Collector pipe flows into retaining clarifier-tank, and retaining clarifier-tank gets up rain water-harvesting as the container for collecting rainwater, prevents take up ground empty
Between, filtering synchronous with purification, the rainwater of collection simultaneously, is pumped into water tank and is stored by antiseepage with vaporization prevention by suction pump
Come, rinse, flush the toilet and some other non-lives for pouring crops, the daily water consumption of landscape plant, washing bay water, road
Water purposes is used, urban pavement discharge pressure is reduced, and by the rainwater purification collected, input is secondary to be used, and is substantially increased
The resource utilization efficiency of rainwater, turns waste into wealth, and alleviates the problem of water resources shortage.
The easy construction of retaining clarifier-tank, efficiency high in the present invention, only locating slot 7 need to be directed at during construction according to positioning convex 6
Mode water filtration separator 4 is loaded in retaining well 2, then inject cement mortar into locating slot 7 so that the bonding of water filtration separator 4 is solid
It is scheduled in retaining well 2, reliable and stable, simple to operate, quick effective, the reduction of erection time；Water filtration separator 4 plays the work of retardance rainwater
With, rainwater can only downwards continue to permeate by treatment hole 5, and the fixed particle remained in rainwater is stopped on the surface of water filtration separator 4,
Cannot fall, separate impurity；Retaining clarifier-tank gets up rain water-harvesting as the container for collecting rainwater, filters same with purification
Step, with vaporization prevention simultaneously, Stability Analysis of Structures is safe and reliable, prevents take up ground space for antiseepage.
The specific embodiment of the present invention is these are only, but the technical characteristic of the present invention is not limited thereto.It is any with this
It is to solve essentially identical technical problem based on bright, realizes essentially identical technique effect, done simple change, etc.
With replacement or modification etc., all it is covered by among protection scope of the present invention.
Claims (9)
1. a kind of construction method of sponge urban rainwater collection system, it is characterised in that comprise the steps：
(a) excavation of foundation pit：According to design working drawing, coordinated by the way of artificial grooving using excavator, excavation pit is to designing mark
Height, clears up bottom of foundation ditch, and then the bullet line of ink marker is levelling, keeps the gradient of bottom of foundation ditch 2%～3%, controls hanging down for foundation pit side-wall
Straight degree is respectively less than 1%, and does support protection, and in the case where bottom of foundation ditch is made, grey wire tag, marks retaining clarifier-tank construction area；
(b) base treatment：Waterproofing geomembrane is laid in the grey coil of mark, is fixed with cement nail every 5～8m, then
The original soil of 150～200mm is backfilled on waterproofing geomembrane, and compacting is rolled back and forth, compacted density ＞ 92%, then placement layer by layer
Concrete cushion, total height is 250～300mm, reserves 100～150mm's between concrete cushion edge and waterproofing geomembrane
The lap of splice, every the reserved ventilating grooves of 10～15m on concrete cushion, and lay 100 from below to up in ventilating groove～
150mm thickness ventilation anti-seepage sand and 100～150mm thick pervious concrete, every layer of uniform compaction, concrete cushion is poured and completed
Afterwards, surface wooden float rubs flat with the hands, and is covered in 12h, conserves 7～8 days；
C () retaining clarifier-tank is built by laying bricks or stones：After concrete cushion acceptance(check), retaining clarifier-tank is built by laying bricks or stones, during pond body is built by laying bricks or stones, will
Water string is attached separately on water inlet and delivery port, hammering compacting, and then collector pipe is arranged on water inlet, by drainpipe
On delivery port, and enclosed in interface winding 2～3 with waterstop, will be filtered according to the mode that positioning convex is directed at locating slot
Water dividing plate loads in retaining well, then injects cement mortar into locating slot, while the slurries for overflowing locating slot are cleared up, from pond body one
Side starts to lay retaining well, and brushing cement mortar in each outside wall surface of retaining well, adjacent retaining well is brought into close contact, the laying of retaining well
After finishing, cover plate and liquid level well are poured successively, liquid level well bassets 50～100mm, and waterproof geotechnique is then laid on the cover board
Film, by waterproofing geomembrane whole cover plate is paved with, and evens up fixation, and reserves the lap of splice of 100～150mm, is then close to pond body
Waterproofing geomembrane is enclosed in outer wall laying one, then by the waterproofing geomembrane under the circle waterproofing geomembrane and concrete cushion, cover plate
Waterproofing geomembrane complete overlap joint process；
D () water tank is in place：Water tank and suction pump are separately fixed on ground, the water side connection water tank of suction pump,
Each road drainpipe is assembled on many siphunculus, then the water side of many siphunculus is connected into the water inlet end of suction pump；
The laying of (e) infiltration basic unit：Retaining clarifier-tank and cover plate are buried with original soil backfill, is often filled out 200～300mm and is manually rammed
It is real, the then laying infiltration basic unit on earthing face, the basic unit that seeps water be followed successively by from the bottom to top the thick coarse sands layers of 100～150mm, 200
The thick metalling of～250mm thick gravel layer and 100～150mm, coarse sands layer buries collector pipe, has laid rear vibration tamp, so
Lay screed-coat on metalling afterwards, the screed-coat levelling compacting of sand is middle to both sides slope 1～1.5%, finally in screed-coat
Upper staggeredly laying water-permeable brick, after water-permeable brick laying is finished, tamps smooth；
(f) water seasoning：After construction is finished, water-permeable brick, and water seasoning are covered with stack of rice straw, curing time is more than 24 hours,
Ensure stack of rice straw moistening during maintenance, and forbid idler to trample.
2. the construction method of a kind of sponge urban rainwater collection system according to claim 1, it is characterised in that：Step
Abandoned stream screened well is buried in the range of foundation ditch periphery 2m in (d), the water inlet end of abandoned stream screened well is accessed in the water side of many siphunculus,
The water side of abandoned stream screened well connects the water inlet end of suction pump.
3. the construction method of a kind of sponge urban rainwater collection system according to claim 1, it is characterised in that：Step
C in () before the laying of retaining well, by retaining well unification water saturates, penetration period is 5～6min.
4. the construction method of a kind of sponge urban rainwater collection system according to claim 1, it is characterised in that：Step
B the specific practice of concrete cushion maintenance is to use covered rearing with plastic film concrete cushion in (), and water seasoning, is protected during maintenance
Card covering material moistening, and forbid idler to trample or continue to construct thereon.
5. a kind of retaining clarifier-tank of the construction method for sponge urban rainwater collection system as claimed in claim 1, its
It is characterised by：Including pond body, retaining well, cover plate and water filtration separator, the cover plate is on the retaining well, and the retaining well is equal
Even to be distributed in the pond body, the water filtration separator is evenly distributed with drainage in the retaining well on the water filtration separator
Hole, is symmetrically distributed with positioning convex on the water filtration separator, be symmetrically distributed with locating slot in the retaining well, the locating slot with
The positioning convex matches, the side of the retaining well is equipped with water-flowing trough, and the pond body is respectively provided on two sides with water inlet
And delivery port.
6. the retaining clarifier-tank of a kind of construction method for sponge urban rainwater collection system according to claim 5,
It is characterized in that：Annular protrusion is provided with the top of the retaining well, between the adjacent annular protrusion drainage channel is formed.
7. the retaining clarifier-tank of a kind of construction method for sponge urban rainwater collection system according to claim 5,
It is characterized in that：The cover plate is provided with liquid level well, and the liquid level well penetrates the cover plate, the liquid level well and the retaining well
Connection, the liquid level well is provided with well lid, and the well lid is provided with leaking hole.
8. the retaining clarifier-tank of a kind of construction method for sponge urban rainwater collection system according to claim 5,
It is characterized in that：The water inlet is provided with water string, and the delivery port is provided with the water string.
9. the retaining clarifier-tank of a kind of construction method for sponge urban rainwater collection system according to claim 5,
It is characterized in that：The retaining well is in regular hexagon shape.
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| CN107989153A (en) * | 2017-12-08 | 2018-05-04 | 芜湖德司节能科技有限公司 | A kind of novel construction method for building sponge city |
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| CN109989474A (en) * | 2017-12-29 | 2019-07-09 | 江苏森洋环境建设集团有限公司 | A kind of construction method of rain water collecting system |
| CN108560677A (en) * | 2018-05-31 | 2018-09-21 | 浙江建设职业技术学院 | Rain water collecting system |
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| CN112095711A (en) * | 2020-09-07 | 2020-12-18 | 苏州胜景泰园林环境建设有限公司 | Rainwater collection and recovery construction method applied to sponge city |
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| CN114994272A (en) * | 2022-05-05 | 2022-09-02 | 南京大学 | Underground water plug-in type composite monitoring well |
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