CN110249844B - Street tree pool with water storage and drainage device - Google Patents

Street tree pool with water storage and drainage device Download PDF

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Publication number
CN110249844B
CN110249844B CN201910606047.5A CN201910606047A CN110249844B CN 110249844 B CN110249844 B CN 110249844B CN 201910606047 A CN201910606047 A CN 201910606047A CN 110249844 B CN110249844 B CN 110249844B
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water
drainage
layer
chamber
pipe
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CN110249844A (en
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芦建国
方静
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Nanjing Forestry University
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Nanjing Forestry University
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D24/00Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D36/00Filter circuits or combinations of filters with other separating devices
    • B01D36/02Combinations of filters of different kinds
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/22Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224Surface drainage of streets
    • E01C11/225Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F1/00Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/002Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells

Abstract

The technology relates to the field of municipal afforestation management, and provides a street tree pool with a water storage and drainage device, which comprises a collecting and drainage device arranged underground a sidewalk, an underground water storage and drainage device arranged between a green belt and a roadway, and a street tree pool arranged underground the green belt; the collecting and draining device is used for collecting proper amount of the downward-seeped rainwater and conveying the collected rainwater to the pavement tree pool; the storage and discharge device is used for filtering sewage in a proper amount to generate filtered water, conveying the filtered water to the street tree pool and discharging excessive sewage to a municipal road sewage pipe; the street tree pool is used for planting street trees, receiving and storing rainwater conveyed by the collecting and discharging device and filtered water conveyed by the storing and discharging device in a proper amount, continuously conveying the filtered water of the rainwater into a planting soil layer through a water absorbing cotton rope, discharging excessive filtered water of the rainwater to a municipal road rainwater pipe, receiving and storing irrigation water, and continuously conveying the irrigation water into the planting soil layer through the water absorbing cotton rope.

Description

Street tree pool with water storage and drainage device
Technical Field
The technology relates to the field of municipal afforestation management, a street tree pool of town road is provided, especially a street tree pool with hold drainage device, can collect and save the rainwater that comes by the earth's surface infiltration in a proper amount, discharge excessive rainwater to town road downspout, also can filter sewage in a proper amount and save drainage, discharge excessive drainage to town road downspout, the rainwater of saving, the sustainable needs that supply the street tree to grow of drainage, be the ecological water-saving city street tree pool that has the row of holding function.
Background
A tree pool structure for planting greening trees on a municipal road is widely applied to the mode that some simple coverings such as iron grates, resin grids, cobblestones, ceramic granules and grass planting bricks are added on the basis of bare soil, and the coverings are organic coverings formed by processing organic matters along with the development of the technology and the improvement of the environmental protection requirement, but the application range is not wide.
Regarding the current tree pool conditions in most domestic areas, the tree pool covering materials cannot meet the requirements of keeping moisture in drought seasons and improving drainage efficiency under the condition of flood disasters, and cannot avoid the condition that some pollutants (such as snow melt agents, grease and the like) enter the tree pool to cause death of street trees, which is a great problem in urban greening management and maintenance.
In recent years, extreme weather frequently occurs, drought and flood disasters are most common in summer every year, under the drought condition, in order to ensure the healthy growth of trees in a tree pool, urban greening management and maintenance needs to regularly water the tree pool, while the tree pool of some cities (such as Beijing) is lack of a cover, the bare soil tree pool is abundant, the soil in the tree pool is hardened due to long-term trampling of pedestrians, the holes are lacked, the water seepage rate is reduced, even if manual watering is carried out, the root of the tree is difficult to fully absorb water and breathe, the tree is easy to die, and the interior of the tree pool is not provided with a water retention measure and needs to be frequently watered, so that the management and maintenance cost is increased; in winter, in northern cities which often run snow, because snow covers the road surface, vehicles cannot pass through, a large amount of snow melting agent is used for melting the snow, and the snow melting agent contains high-concentration salt, so that in habit, people can shovel some snow water doped with the snow melting agent into a tree pool nearby, and trees are easy to die.
In rainy season, urban flood disasters in south are frequent, urban ponding is serious, great inconvenience is brought to outgoing and living of people, serious economic loss is brought to people sometimes, and it is urgent to drain ponding rapidly.
However, the tree pool of the street tree in the current city still can not effectively participate in the drainage of the city, the drainage efficiency of the city is improved, pollutants such as grease, chemical products and the like can be deposited on the street of the city, and the pollutants can permeate into the ground along with rainwater through surface runoff to pollute the underground water environment of the city and influence the healthy growth of the street tree.
Under the call of actively promoting and constructing 'sponge city', a new scheme is proposed for city construction. In order to reduce the environmental pollution, the 'rain and sewage diversion' project is already spread in most cities, in short, for municipal roads, rain water and sewage respectively flow in different ways (municipal road rain water pipes and municipal road sewage pipes), the rain water can be directly or circularly utilized and is allowed to be directly discharged to rivers and lakes, and the sewage is conveyed to sewage treatment plants for pollution reduction and removal.
The basic structure of the town road is as follows: the road is divided from outside to inside by a pedestrian path, a green belt and a roadway, a road tooth embedded between the roadway and the green belt separates the roadway from the green belt, the road tooth, the green belt and a sidewalk are equal in height, the roadway is lower than the green belt and the sidewalk, and a roadway tree is planted in a tree pool arranged on the green belt.
In this case, water used by the management personnel to irrigate the street trees and replenish water to the street trees is referred to as irrigation water, snow melt water and/or rainwater on the roadways, which are heavily polluted, are collectively referred to as sewage, and water obtained by percolating the sewage is referred to as filtered water.
Disclosure of Invention
The technical purpose is to provide a street tree pool with a water storage and drainage device, which can properly collect and store rainwater permeated from the earth surface and discharge excessive rainwater to a municipal road rainwater pipe, also can properly filter sewage and store filtered water and discharge excessive filtered water to the municipal road rainwater pipe, and the stored rainwater and the filtered water can continuously meet the requirement of growing street trees, thereby being an ecological water-saving urban street tree pool with the water storage and drainage function.
The technical purpose is realized by the following technical scheme:
a pavement tree pool with a water storage and drainage device comprises a collecting and drainage device arranged underground a sidewalk, an underground storage and drainage device arranged between a green belt and a roadway and a pavement tree pool arranged underground the green belt.
The collecting and draining device is used for collecting the downward-seeping rainwater in a proper amount and conveying the collected rainwater to the street tree pool.
The storage and discharge device is used for filtering sewage in a proper amount to generate filtered water, conveying the filtered water to the street tree pool and discharging excessive sewage to the municipal road sewage pipe.
The street tree pool is used for planting street trees, receiving and storing rainwater conveyed by the collecting and discharging device and filtered water conveyed by the storing and discharging device in a proper amount, continuously conveying the filtered water of the rainwater into a planting soil layer through a water absorbing cotton rope, discharging excessive filtered water of the rainwater to a municipal road rainwater pipe, receiving and storing irrigation water, and continuously conveying the irrigation water into the planting soil layer through the water absorbing cotton rope.
The collecting and discharging device comprises a collecting and discharging ditch which is concavely arranged on the sidewalk along the longitudinal direction of the sidewalk and is provided with a lower groove bottom tamped by plain soil, permeable geotextile laid on the bottom of the collecting and discharging ditch, a fine gravel layer filled in the collecting and discharging ditch, a coarse gravel layer which is wrapped in the fine gravel layer along the longitudinal direction of the collecting and discharging ditch and is positioned at the lower part of the collecting and discharging ditch, a water collecting pipe which is wrapped in the coarse gravel layer along the longitudinal direction of the collecting and discharging ditch and is provided with water seepage holes on the pipe wall, a fine sand layer laid on the fine gravel layer, and permeable bricks laid on the fine sand layer and used as the pavement of the sidewal.
The storage and drainage device comprises a storage and drainage inner chamber which is embedded between a green belt and a roadway and is hermetically connected between adjacent brickworks, the storage and drainage inner chamber is divided into a percolation chamber which is positioned in the storage and drainage inner chamber vertically and is hermetically connected with the brickworks at the bottom of the storage and drainage inner chamber, a drainage chamber which is positioned on the upper part of the inner side and is provided with an overflow port, and a water inlet chamber which is positioned on the upper parts of the percolation chamber and the drainage chamber, wherein a water inlet is formed in the side surface of the water inlet chamber and leads to the roadway; filling a fine gravel layer, a fine sand layer, an activated carbon layer, a filter cotton layer, a volcanic rock layer and a slag layer in sequence from bottom to top in a percolation chamber, and lining a permeable geotextile between the fine gravel layer and the fine sand layer; the opening of the percolation chamber is lower than the overflow port.
The street tree pool comprises a tree pool body which is concavely arranged on a green belt and is provided with inner and outer masonry bodies and a concave pool bottom tamped by plain soil, permeable geotextile laid on the pool bottom, a coarse gravel layer filled on the lower part of the tree pool body, a municipal road rainwater pipe embedded in the coarse gravel layer and provided with a water seepage hole on the pipe wall, a fine gravel layer laid on the coarse gravel layer, permeable geotextile laid on the fine gravel layer, a planting soil layer filled on the permeable geotextile and used for embedding a street tree soil ball, an organic covering layer laid on the planting soil layer, a cast iron cover plate laid on the organic covering layer and provided with a hole, a water collecting tank embedded between the coarse gravel layer and the fine gravel layer and having a top surface coplanar with the bottom surface of the fine gravel layer, and a water absorption cotton rope penetrating through the fine gravel layer and provided on the water collecting tank top plate and connecting the inside of the water collecting tank with the planting soil layer, the top plate of the water collecting tank is provided with a water seepage seam.
The lower part of the outer masonry of the storage and drainage inner chamber and the water collecting tank are hermetically provided with a water delivery pipe for communicating the percolation chamber and the water collecting tank, the bottom of the water collecting pipe and the water collecting tank are hermetically provided with a water delivery pipe for communicating the water collecting pipe and the water collecting tank, and the bottom of the drainage chamber is fixedly connected with a drainage pipe for communicating the drainage chamber and a municipal road sewage pipe.
Pavement, tree pool body, hold row inner chamber top brickwork such as high, hold row inner chamber top brickwork apart from the roadway road slab and equal curb height.
The water collecting pipe and the percolation chamber are positioned above the water collecting tank.
The beneficial effect of this technique is:
above-mentioned street tree pond during operation with hold drainage device:
1. in the drought season:
the management personnel irrigate and replenish water to street trees with soil balls embedded in the planting soil layer, irrigation water can permeate into the planting soil layer through the cast iron cover plate and the organic cover layer of the tree pool body, tree roots can fully absorb irrigation water in the planting soil layer which is not trampled tightly due to protection of the cast iron cover plate and the organic cover layer, redundant irrigation water seeps downwards and is gathered into the water collecting tank through the water seepage seam for storage, and the irrigation water is continuously conveyed into the planting soil layer through the water absorption cotton rope for the absorption of the tree roots, so that the planting soil layer can be moisturized for a long time; the organic covering has the effects of heat preservation and moisture preservation, and can provide necessary nutrients for the street trees through decomposition.
2. In rainy and snowy days:
1) for the collecting and draining device, rainwater and snow melt water with light pollution on the sidewalk penetrate into the fine sand layer through the water permeable bricks on the surface layer, continuously penetrate downwards through the fine sand layer, reach the gravel layer, are gathered to the water collecting pipe through the water seepage holes, are conveyed into the water collecting tank inside the tree pool body through the water conveying pipe at the bottom of the water collecting pipe for storage, and are continuously conveyed into the planting soil layer through the water absorbing cotton rope for the absorption of tree roots, so that the planting soil layer is kept moist for a long time;
2) for the storage and discharge device, sewage is intercepted at a water inlet through a stainless steel barrier net along the ground surface through the gradient of a roadway, the stainless steel barrier net with certain density blocks leaves or other garbage on the road surface, rainwater is allowed to permeate, an inner chamber is prevented from being blocked, the rainwater firstly enters a percolation chamber through a slope partition, flows into a water inlet chamber through a water inlet after being filtered and purified by fillers with strong filtering performance, firstly enters the percolation chamber, forms drainage water through filtering and purifying of the fillers, the drainage water is conveyed into a water collecting tank through a water conveying pipe to be stored, and is continuously conveyed into a planting soil layer through a water absorption cotton rope to be absorbed by tree roots, so that the planting soil layer is kept moist for a long time;
3. when the rainfall is sudden, the percolation chamber can not filter excessive sewage, the excessive sewage overflows and enters the drainage chamber through the overflow port through a partition opening above a partition plate of the drainage chamber, a blocking net which is the same as the water inlet is arranged at the partition opening to block other impurities so as to prevent the drainage port from being blocked, and because the pavement of the roadway is seriously polluted, a water source which is not filtered and purified can be used or seeps into the ground after being treated, the water source is directly discharged to a municipal road sewage pipe through a drainage pipe arranged at the bottom of the drainage chamber; when snow melt water containing the snow melt agent enters the infiltration chamber through the water inlet, the snow melt water is also filtered and purified by the filter filling in the infiltration chamber, so that the snow melt water containing the snow melt agent is prevented from directly contacting with the street trees to cause the death of the street trees;
4. when the precipitation is too large and the precipitation time is long, the water delivery pipe continuously delivers rainwater and filtered water to the water collection tank, most of the excessive rainwater and filtered water overflow through a water seepage seam arranged on the top plate of the water collection tank, seep downwards through the coarse gravel layer and seep into the municipal road rainwater pipe through a water seepage hole; a small part of rainwater and filtered water permeate into the underground through the permeable geotextile to supplement underground water.
The street tree pool with the water storage and drainage device can properly collect and store rainwater permeated from the ground surface and discharge excessive rainwater to the municipal road rainwater pipe, also can properly filter sewage and store filtered water and discharge excessive filtered water to the municipal road rainwater pipe, and the stored rainwater and the filtered water can continuously meet the requirement of growing of the street trees, so that the street tree pool is a water-saving ecological urban street tree pool with the water storage and drainage function.
The pipe diameter of the water delivery pipe is 20 mm-40 mm, the pipe diameter of the water drainage pipe is 40 mm-60 mm, and the pipe diameter of the water collection pipe is 150 mm-170 mm.
In the street tree pool with the water storage and drainage device, the particle size of the fine crushed stone layer is 20-30 mm, and the particle size of the coarse crushed stone layer is 30-50 mm.
Regarding the collecting and draining device, the fine sand layer is a leveling layer with the thickness of 20 mm-40 mm, and the specification of the water permeable bricks is 300mm multiplied by 50 mm.
The shade tree pool with the water storage and drainage device has the advantages that the thickness of the fine crushed stone layer is 20-40 mm, the thickness of the planting soil layer is 800-1000 mm, and the thickness of the organic cover layer is 40-60 mm; the water collecting tank is a box body with a big-end-up trapezoidal frustum pyramid structure, the aperture of a plurality of through holes uniformly distributed on a top plate of the water collecting tank is 40-60 mm, the width of a water seepage seam parallel to the side edge of the top plate of the water collecting tank is 8-12 mm, and the water collecting tank is made of glass fiber reinforced plastic, PE or PVC.
The organic covering layer is an organic plate covering formed by processing various organic biological materials (such as trimmed tree branches, barks and the like) and is laid on the surface of the planting soil layer of the street trees, has certain functions of heat preservation, moisture preservation, degradation and pollution, and can increase nutrients of the planting soil layer after the organic plate covering is decomposed. The water collecting tank made of the glass fiber reinforced plastics or the hard plastics has the function of corrosion resistance, the service life of the water collecting tank can be effectively prolonged, and the manufacturing cost is also reduced.
The above-mentioned shade tree pond with store drainage device, about storing drainage device: in the infiltration chamber, the thickness of the fine sand layer is 40 mm-60 mm, the thickness of the activated carbon layer is 280 mm-320 mm, the thickness of the volcanic rock layer is 40 mm-60 mm, and the thickness of the slag layer is 80 mm-120 mm; the drainage chamber is characterized in that a masonry body which is fixedly connected with a water inlet and the top of the drainage chamber on the middle masonry body inclines downwards from inside to outside, an overflow port is formed in the middle masonry body to communicate the drainage chamber with the water inlet, and stainless steel blocking nets are fixedly arranged on the water inlet and the overflow port and used for blocking sundries mixed in sewage; the inlet of the water delivery pipe is positioned in the fine gravel layer and inclines downwards from the percolation chamber to the water collection tank.
The filter chamber is filled with the fillers with different thicknesses in the sequence, so that the filtering and purifying effect of the filter chamber on sewage can be optimized; the inclined direction of the brickwork at the top of the drainage chamber has better diversion effect on sewage; the water delivery pipe which is arranged obliquely downwards is adopted, so that the pressure for delivering filtered water from the percolation chamber to the water collection tank can be increased, and the water delivery is smoother and more thorough.
The dimensions of the tree pool body, the water inlet and the overflow port in the horizontal direction are equal.
In the roadway tree pool with the water storage and drainage device, the road plates on two sides of the roadway are inclined downwards towards the water inlet, and the upper surfaces of the road plates are aligned with the lower edge of the water inlet.
The pavement tree pool with the water storage and drainage device can ensure that sewage is thoroughly discharged to the water storage and drainage inner chamber, and water accumulation on the pavement is prevented.
Drawings
FIG. 1 is a schematic illustration of a shade tree pool with water storage and drainage means;
FIG. 2 is a schematic illustration of a charge-discharge device;
FIG. 3 is a schematic view of a header tank;
fig. 4 is a rear view of fig. 3.
Detailed Description
The present technology is further described below with reference to the accompanying drawings:
referring to fig. 1, 2 and 3, the pavement tree pool with the water storage and drainage device comprises a collecting and drainage device 3 arranged underground a sidewalk 38, a water storage and drainage device 2 arranged underground between a green belt 5 and a roadway 4, and a pavement tree pool 8 arranged underground the green belt 5.
The collecting and draining device 3 is used for collecting the downward-seeping rainwater in a proper amount and conveying the collected rainwater to the street tree pool 8. The collecting and draining device 8 comprises a collecting and draining ditch 39 which is concavely arranged on the sidewalk 38 along the longitudinal direction of the sidewalk 38 and is provided with a lower groove bottom tamped by plain soil, a permeable geotextile 35 which is laid on the ditch bottom of the collecting and draining ditch 39, a fine gravel layer 34 filled in the collecting and draining ditch 39, a coarse gravel layer 36 which is wrapped in the fine gravel layer 34 along the longitudinal direction of the collecting and draining ditch 39 and is positioned at the lower part of the collecting and draining ditch 39, a water collecting pipe 33 which is wrapped in the coarse gravel layer 36 along the longitudinal direction of the collecting and draining ditch 39 and is provided with water seepage holes (not shown in the figure) on the pipe wall, a fine sand layer 32 which is laid on the fine gravel layer 34, and a permeable brick 31 which is laid on the fine sand layer 32.
The width of the collecting and draining ditch 39 is equal to the width of the sidewalk 38, and the water permeable bricks 31 are paved on the sidewalk 38 to be used as a sidewalk pavement.
The fine sand layer 32 of the collecting and draining ditch 39 is a leveling layer with the thickness of 20 mm-40 mm (in the present case, the thickness of the fine sand layer 32 is 30mm), and the specification of the water permeable brick is 300mm multiplied by 50 mm.
The storage and discharge device 2 is used for filtering sewage in a proper amount to generate filtered water, conveying the filtered water to the street tree pool 8 and discharging excessive sewage to a municipal road sewage pipe (not shown). The storage and drainage device 2 comprises a storage and drainage inner chamber 27 which is embedded between the green belt 5 and the roadway 4 and is hermetically connected between adjacent masonries 26, the storage and drainage inner chamber 27 is divided into a percolation chamber 272 which is positioned at the top opening 271 of the outer side, a drainage chamber 274 which is positioned at the upper part of the inner side and is provided with an overflow port 273, and a water inlet chamber 275 which is positioned at the upper parts of the percolation chamber 272 and the drainage chamber 274 by middle masonries 28 which are vertically arranged in the storage and drainage inner chamber 27 and are hermetically connected with the masonries, and the side surface of the water inlet chamber 275 is provided with a water inlet 276 which leads to the; a fine gravel layer 227, a fine sand layer 225, an activated carbon layer 224, a filter cotton layer 223, a volcanic rock layer 222 and a slag layer 221 are sequentially filled in the infiltration chamber 272 from bottom to top, and a permeable geotextile 226 is lined between the fine gravel layer 227 and the fine sand layer 225; the percolation chamber opening 271 is lower than the overflow 273.
In the infiltration chamber 272, the fine sand layer 225 has a thickness of 40mm to 60mm (in this case, 50mm), the activated carbon layer 224 has a thickness of 280mm to 320mm (in this case, 300mm), the volcanic rock layer has a thickness of 40mm to 60mm (in this case, 50mm), and the slag layer has a thickness of 80mm to 120mm (in this case, 100 mm).
On the drainage chamber 274, a drainage chamber top masonry 277 fixedly connected to the water inlet 276 and the middle masonry 28 inclines downwards from inside to outside, an overflow 273 (in the figure, the overflow 273 is arranged at the top of the middle masonry 28) is arranged on the middle masonry 28 and is communicated with the drainage chamber 274 and the water inlet chamber 275, and a stainless steel barrier net 21 is fixedly arranged on the water inlet 276 and the overflow 273 and is used for intercepting sundries mixed in the sewage.
The road plates 41 on both sides of the road surface of the roadway 4 are inclined downward toward the water inlet 276, and the upper surfaces of the road plates 41 are flush with the lower edges of the water inlet 276.
The street tree pool 8 is used for planting the street trees 11, receiving and storing rainwater conveyed by the collecting and draining device 3 and filtered water conveyed by the storing and draining device 2 in a proper amount, continuously conveying the rainwater and (or) the filtered water into a planting soil layer 17 through a water absorbing cotton rope 13, releasing excessive rainwater and (or) the filtered water into a municipal road rainwater pipe 15, receiving and storing irrigation water, and continuously conveying the irrigation water into the planting soil layer 17 through the water absorbing cotton rope 13. The shade tree pool 8 comprises a tree pool body 1 concavely arranged on a green belt 5 and having inner and outer masonry 51, 52 and a concave pool bottom tamped with plain soil, a permeable geotextile 53 laid on the pool bottom, a coarse gravel layer 20 filled in the lower part of the tree pool body 1, a town road rainwater pipe 15 embedded in the coarse gravel layer 20 and having a water seepage hole (not shown in the drawing) on the pipe wall, a fine gravel layer 19 laid on the coarse gravel layer 20, a permeable geotextile 18 laid on the fine gravel layer 19, a planting soil layer 17 filled on the permeable geotextile 18 for embedding a shade tree ball 111, an organic cover layer 16 laid on the planting soil layer 17, a cast iron cover plate 12 laid on the organic cover layer 16 and having a pore, a water collection tank 14 embedded between the coarse gravel layer 20 and the fine gravel layer 19 and having a tank top surface coplanar with the bottom surface of the fine gravel layer 19, a penetrating hole 142 formed on the water collection tank top plate 19 and a penetrating hole 142 formed on the water collection tank top plate, The water absorption cotton rope 13 connecting the inside of the water collection tank 14 and the planting soil layer 17 is provided with a water seepage seam 141 on the top plate of the water collection tank 14. The cast iron cover plate 12 is prior art and will not be described in detail.
Specifically, the water collection tank 14 is a closed tank body with a big-top-down trapezoidal frustum structure, the aperture of a plurality of through holes 142 uniformly distributed on the top plate of the water collection tank 14 is 40 mm-60 mm, and the width of a water seepage seam 141 parallel to the side edge of the top plate of the water collection tank is 8 mm-12 mm. Oval mounting holes 143 are respectively formed in the two side plates of the water collection tank 14, and are used for obliquely penetrating the water pipes 37 and 25 and the two side plates of the water collection tank 14 and then sealing and mounting the water pipes 37 and 25. In order to facilitate the penetration of the absorbent cotton rope 13 and make the absorbent cotton rope 13 touch the bottom of the water collecting tank 14 to fully utilize the water in the water collecting tank 14, the penetrating holes 142 are uniformly distributed in the rectangular range of the top plate of the water collecting tank 14, and the rectangular range is the same as the bottom plate of the water collecting tank 14 in shape. In this case, there are 9 through holes 142, the diameter of the through hole 142 is 50mm, and the width of the water-permeable seam 141 is 10 mm. The water collection tank 14 is made of glass fiber reinforced plastic or rigid plastic. In the scheme, the water collecting tank 14 is made of glass fiber reinforced plastic.
The thickness of the fine gravel layer 19 of the street tree pool 8 is 20 mm-40 mm, the thickness of the planting soil layer 17 is 800 mm-1000 mm, and the thickness of the organic cover layer 16 is 40 mm-60 mm. In the scheme, the thickness of the fine gravel layer 19 is 30mm, the thickness of the planting soil layer 17 is 900mm, and the thickness of the organic cover layer 16 is 50 mm.
In the present case, hold row inner chamber 27 and the coincidence of the adjacent vertical brickwork of tree pool body 1.
The lower part of the outer brickwork of the storage and drainage inner chamber 27 and the water collecting tank 14 are hermetically provided with a water conveying pipe 25 through a mounting hole 143 for communicating the percolation chamber 272 with the water collecting tank 14, the bottom of the water collecting pipe 33 and the water collecting tank 14 are hermetically provided with a water conveying pipe 37 through a mounting hole 143 for communicating the water collecting pipe 33 with the water collecting tank 14, and the bottom of the drainage chamber 23 is fixedly connected with a drainage pipe 24 for communicating the drainage chamber 23 with a municipal road sewage pipe. The inlet of the water duct 25 is located in the fine gravel layer 227 and is inclined downward from the infiltration chamber 272 to the water collection tank 14. In the illustration, each of the water pipes 25, 37 has a horizontal section that obliquely intersects with the side plate of the water collection tank 14.
The pavement of the sidewalk 38, the tree pool body 1, and masonry at the top of the storage and discharge inner chamber 27 are equal in height, and the distance between the masonry at the top of the storage and discharge inner chamber 27 and the roadway plate 41 is equal to the height of a curb (not shown in the drawing).
The header 33 and the percolation chamber 272 are located above the header tank 14.
In the street tree pool with the water storage and drainage device, the pipe diameters of the water pipes 25 and 37 are 20-40 mm, the pipe diameter of the drainage pipe 24 is 40-60 mm, and the pipe diameter of the water collection pipe 33 is 150-170 mm. In this case, the pipe diameters of the water supply pipe 25 and the water delivery pipe 37 are 30mm, the pipe diameter of the water discharge pipe 24 is 50mm, and the pipe diameter of the water collection pipe 33 is 160 mm.
In the street tree pool with the water storage and drainage device, the particle size of the fine crushed stone layers 227 and 34 is 20-30 mm, and the particle size of the coarse crushed stone layer 36 is 30-50 mm.
In the sidewalk tree pool with the water storage and drainage device, the tree pool body 1, the water inlet 276 and the overflow port 273 have the same size in the horizontal direction.
The above-mentioned embodiment of the street tree pool with the water storage and drainage device is used for planting street trees in the tree pool body in the green belt, and obviously, the technology is also suitable for other green plants in the green belt, such as grass plants, hedges and the like. While the above-mentioned embodiments of the tree pool with water storage and drainage devices are for municipal roads, it is obvious that the present technology is also suitable for many more situations, such as residential areas, schools, etc.
Above-mentioned street tree pond during operation with hold drainage device:
1. in the drought season:
the management personnel irrigate and replenish water to street trees buried in a planting soil layer by soil balls, irrigation water can permeate into the planting soil layer through a cast iron cover plate and an organic cover layer of a tree pool body, tree roots can fully absorb the irrigation water in the planting soil layer which is not trampled tightly due to the protection of the cast iron cover plate and the organic cover layer, redundant irrigation water seeps downwards and gathers into a water collecting tank through a water seepage seam to be stored, the irrigation water is continuously conveyed into the planting soil layer through a water absorption cotton rope to be absorbed by the tree roots, the planting soil layer is enabled to be moisturized for a long time, the organic cover has the effects of heat preservation and moisture preservation, and necessary nutrients can be provided for the street trees after decomposition.
2. In rainy and snowy days:
1) for the collecting and draining device, rainwater and snow melt water with light pollution on the sidewalk penetrate into the fine sand layer through the water permeable bricks on the surface layer, continuously penetrate downwards through the fine sand layer, reach the gravel layer, are gathered to the water collecting pipe through the water seepage holes, are conveyed into the water collecting tank inside the tree pool body through the water conveying pipe at the bottom of the water collecting pipe for storage, and are continuously conveyed into the planting soil layer through the water absorbing cotton rope for the absorption of tree roots, so that the planting soil layer is kept moist for a long time;
2) for the storage and drainage device, sewage is firstly introduced into the infiltration chamber under the flow guide effect of the brickwork at the top of the drainage chamber after impurities are intercepted by the stainless steel blocking net at the water inlet along the inclined road plate along the ground surface and flow into the water inlet chamber through the water inlet, filtered and purified by fillers to form filtered water, and the filtered water is conveyed into the water collection tank for storage through the water conveying pipe and is continuously conveyed into the planting soil layer through the water absorption cotton rope for the absorption of tree roots, so that the planting soil layer is kept moist for a long time; when snow melt water containing the snow melt agent enters the infiltration chamber through the water inlet, the snow melt water is filtered and purified by the filter materials filled in the infiltration chamber to form filtered water, so that the snow melt water containing the snow melt agent is prevented from contacting with the root system of the street tree to cause the death of the street tree.
3. When the rainfall is sudden, the percolation chamber can not filter excessive sewage, the excessive sewage overflows, impurities are intercepted by the stainless steel blocking net, the impurities enter the drainage chamber through the overflow port, and the impurities are directly discharged to a municipal road sewage pipe through a drainage pipe arranged at the bottom of the drainage chamber.
4. When the precipitation is too large and the precipitation time is long, the water delivery pipe continuously delivers rainwater and filtered water to the water collection tank, most of the excessive rainwater and filtered water overflow through a water seepage seam arranged on the top plate of the water collection tank, seep downwards through the coarse gravel layer and seep into the municipal road rainwater pipe through a water seepage hole; a small part of rainwater and filtered water permeate into the underground through the permeable geotextile to supplement underground water.
The beneficial effect of this technique is:
the street tree pool with the water storage and drainage device can properly collect and store rainwater permeated from the ground surface and discharge excessive rainwater to the municipal road rainwater pipe, also can properly filter sewage and store filtered water and discharge excessive filtered water to the municipal road rainwater pipe, and the stored rainwater and the filtered water can continuously meet the requirement of growing of the street trees, so that the street tree pool is a water-saving ecological urban street tree pool with the water storage and drainage function.

Claims (8)

1. A pavement tree pool with a water storage and drainage device is characterized by comprising a collecting and drainage device arranged underground a sidewalk, an underground water storage and drainage device arranged between a green belt and a roadway and a pavement tree pool arranged underground the green belt; the collecting and draining device is used for collecting proper amount of the downward-seeped rainwater and conveying the collected rainwater to the pavement tree pool; the storage and discharge device is used for filtering sewage in a proper amount to generate filtered water, conveying the filtered water to the street tree pool and discharging excessive sewage to a municipal road sewage pipe; the street tree pool is used for planting street trees, receiving and storing rainwater conveyed by the collecting and draining device and filtered water conveyed by the storing and draining device in a proper amount, continuously conveying the filtered water of the rainwater into a planting soil layer through a water absorbing cotton rope, discharging excessive filtered water of the rainwater into a municipal road rainwater pipe, receiving and storing irrigation water and continuously conveying the irrigation water into the planting soil layer through the water absorbing cotton rope;
the collecting and discharging device comprises a collecting and discharging ditch which is concavely arranged on the sidewalk along the longitudinal direction of the sidewalk and is provided with a lower groove bottom tamped by plain soil, permeable geotextile laid on the bottom of the collecting and discharging ditch, a fine gravel layer filled in the collecting and discharging ditch, a coarse gravel layer which is wrapped in the fine gravel layer along the longitudinal direction of the collecting and discharging ditch and is positioned at the lower part of the collecting and discharging ditch, a water collecting pipe which is wrapped in the coarse gravel layer along the longitudinal direction of the collecting and discharging ditch and is provided with a water seepage hole on the pipe wall, a fine sand layer laid on the fine gravel layer, and permeable bricks laid on the fine sand layer and used as the pavement of the;
the storage and drainage device comprises a storage and drainage inner chamber which is embedded between a green belt and a roadway and is hermetically connected between adjacent brickworks, the storage and drainage inner chamber is divided into a percolation chamber which is positioned in the storage and drainage inner chamber vertically and is hermetically connected with the brickworks at the bottom of the storage and drainage inner chamber, a drainage chamber which is positioned on the upper part of the inner side and is provided with an overflow port, and a water inlet chamber which is positioned on the upper parts of the percolation chamber and the drainage chamber, wherein a water inlet is formed in the side surface of the water inlet chamber and leads to the roadway; filling a fine gravel layer, a fine sand layer, an activated carbon layer, a filter cotton layer, a volcanic rock layer and a slag layer in sequence from bottom to top in a percolation chamber, and lining a permeable geotextile between the fine gravel layer and the fine sand layer; the opening of the percolation chamber is lower than the overflow port;
the street tree pool comprises a tree pool body which is concavely arranged on a green belt and is provided with inner and outer masonry bodies and a concave pool bottom tamped by plain soil, permeable geotextile laid on the pool bottom, a coarse gravel layer filled on the lower part of the tree pool body, a municipal road rainwater pipe embedded in the coarse gravel layer and provided with a water seepage hole on the pipe wall, a fine gravel layer laid on the coarse gravel layer, permeable geotextile laid on the fine gravel layer, a planting soil layer filled on the permeable geotextile and used for embedding a street tree soil ball, an organic covering layer laid on the planting soil layer, a cast iron cover plate laid on the organic covering layer and provided with a hole, a water collecting tank embedded between the coarse gravel layer and the fine gravel layer and having a top surface coplanar with the bottom surface of the fine gravel layer, and a water absorption cotton rope penetrating through the fine gravel layer and provided on the water collecting tank top plate and connecting the inside of the water collecting tank with the planting soil layer, a water seepage seam is arranged on the top plate of the water collection tank;
a water pipe is hermetically arranged on the lower part of the outer masonry of the storage and drainage inner chamber and the water collecting tank and is used for communicating the percolation chamber and the water collecting tank, a water pipe is hermetically arranged on the bottom of the water collecting pipe and the water collecting tank and is used for communicating the water collecting pipe and the water collecting tank, and a drainage pipe is fixedly connected to the bottom of the drainage chamber and is used for communicating the drainage chamber and a municipal road sewage pipe;
the height of the pavement, the tree pool body and the masonry at the top of the storage and discharge inner chamber is equal to the height of a curb from the masonry at the top of the storage and discharge inner chamber to a roadway plate;
the water collecting pipe and the percolation chamber are positioned above the water collecting tank.
2. The conduit tree pool with water storage and drainage device as claimed in claim 1, wherein the pipe diameter of the water delivery pipe is 20 mm-40 mm, the pipe diameter of the drainage pipe is 40 mm-60 mm, and the pipe diameter of the water collection pipe is 150 mm-170 mm.
3. The shade tree pit with water storing and draining device as claimed in claim 1, wherein the fine crushed stone layer has a particle size of 20mm to 30mm, and the coarse crushed stone layer has a particle size of 30mm to 50 mm.
4. The shade tree pit with water storage and drainage device as claimed in claim 1, wherein the fine sand layer is a 20mm to 40mm thick leveling layer and the permeable bricks are 300mm x 50mm in size with respect to the drainage device.
5. The shade tree pool with water storage and drainage device as claimed in claim 1, wherein, regarding the shade tree pool, the thickness of the fine crushed stone layer is 20mm to 40mm, the thickness of the planting soil layer is 800mm to 1000mm, and the thickness of the organic cover layer is 40mm to 60 mm; the water collecting tank is a box body with a big-end-up trapezoidal frustum pyramid structure, the aperture of a plurality of through holes uniformly distributed on a top plate of the water collecting tank is 40-60 mm, the width of a water seepage seam parallel to the side edge of the top plate of the water collecting tank is 8-12 mm, and the water collecting tank is made of glass fiber reinforced plastic, PE or PVC.
6. The shade tree pit with water storage and drainage device of claim 1, wherein with respect to the storage and drainage device: in the infiltration chamber, the thickness of the fine sand layer is 40 mm-60 mm, the thickness of the activated carbon layer is 280 mm-320 mm, the thickness of the volcanic rock layer is 40 mm-60 mm, and the thickness of the slag layer is 80 mm-120 mm; the drainage chamber is characterized in that a masonry body which is fixedly connected with a water inlet and the top of the drainage chamber on the middle masonry body inclines downwards from inside to outside, an overflow port is formed in the middle masonry body to communicate the drainage chamber with the water inlet, and stainless steel blocking nets are fixedly arranged on the water inlet and the overflow port and used for blocking sundries mixed in sewage; the inlet of the water delivery pipe is positioned in the fine gravel layer and inclines downwards from the percolation chamber to the water collection tank.
7. The shade tree pit with water storage and drainage device of claims 1, 5 and 6, wherein the size of the pit body, the water inlet and the overflow port in the horizontal direction are equal.
8. The shade tree pit with water storage and drainage device of claim 1, wherein the two side plates of the roadway slope downward toward the water inlet, and the upper surfaces of the side plates are flush with the lower edge of the water inlet.
CN201910606047.5A 2019-07-05 2019-07-05 Street tree pool with water storage and drainage device Active CN110249844B (en)

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CN110754252A (en) * 2019-10-08 2020-02-07 安徽嘉景农业综合开发有限公司 Seedling is transplanted and is promoted to grow device
CN111226760A (en) * 2020-04-14 2020-06-05 王聪燕 Municipal afforestation is with filling in formula rainwater collection device
CN111485600A (en) * 2020-05-28 2020-08-04 河南省纺织建筑设计院有限公司 Building rainwater utilization system
CN111608044A (en) * 2020-05-29 2020-09-01 上海新园林实业有限公司 Compromise street both sides afforestation structure of drainage and road guide
CN112982072B (en) * 2021-02-19 2021-09-03 广东东篱环境股份有限公司 Green belt water storage and drainage curbstone system and water storage and drainage method

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KR101374622B1 (en) * 2011-12-19 2014-03-26 한국건설기술연구원 A street tree box having function of sinking prevention
CN103548601B (en) * 2013-10-25 2015-05-13 北京建筑大学 Tree pool and method for filtering runoff rainwater through tree pool
CN106865642B (en) * 2017-02-24 2019-09-27 维尔利环保科技集团股份有限公司 Road rain water runoff pollution control system and its processing method
CN208949674U (en) * 2018-07-24 2019-06-07 宁波绿茵市政园林股份有限公司 A kind of road rain water biology delay ditch
CN109235182A (en) * 2018-09-28 2019-01-18 浙江广安建设有限公司 A kind of sponge-type road pavement structure

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