CN108222216B - A rainwater ecological drainage system and its construction method - Google Patents
A rainwater ecological drainage system and its construction method Download PDFInfo
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- CN108222216B CN108222216B CN201810250202.XA CN201810250202A CN108222216B CN 108222216 B CN108222216 B CN 108222216B CN 201810250202 A CN201810250202 A CN 201810250202A CN 108222216 B CN108222216 B CN 108222216B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
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Abstract
A rainwater ecological drainage system and a construction method thereof belong to the field of municipal construction, a plurality of underground water seepage wells are arranged in the water seepage ground, underdrain and a plurality of horizontally paved pipes are sequentially arranged from high to low on the bottom surface of the plurality of water seepage wells, the horizontally paved pipes are inlaid at the bottom of a concrete cushion layer arranged in a building foundation, a crushed stone rammed soil layer or a water seepage pipe vertically arranged on the rammed soil layer is arranged below the horizontally paved pipes, rainwater can flow into the building bottom from the water seepage wells to infiltrate into the ground, and the underground rainwater seepage structure and the ground rainwater structure form a complete rainwater ecological drainage system, so that the rainwater drainage capacity can be improved, urban waterlogging formed by rainwater can be reduced, a convenient environment is provided for resident traveling, the loss caused by the rainwater waterlogging can be reduced, and the natural disaster capacity caused by the urban response to the natural environment can be improved.
Description
Technical Field
The invention relates to a rainwater drainage system and a construction method thereof, in particular to a rainwater ecological drainage system and a construction method thereof, and belongs to the field of municipal buildings.
Background
Along with the development of industrialization and urbanization, the carbon emission is increased, the ozone layer is destroyed, the earth surface temperature is increased, the rainwater is increased, urban traffic is affected due to unsmooth drainage and urban waterlogging, the living production of people is affected, the living environment is greatly polluted, and even property loss and life cost are brought.
In recent years, along with the occurrence of environmental pollution and natural disasters, people continuously dislike and pay attention to protecting the environment, maintain ecological balance and build environment-friendly cities.
In terms of the ground drainage system, a planting roof is arranged on a roof, grass planting grooves are formed in green lands, so that rainwater can circulate conveniently, permeable pavement is arranged in roads, primary concave green lands are arranged in front of and behind a house, secondary concave green lands with lower elevation are arranged on roads and parking lots far away from the front of and behind the house, and rainwater flowing dark channels are arranged when the roads are met; a rainwater garden or a pond lower than the concave green land is arranged around the square zone, the concave green land, a parking lot and the rainwater garden or the pond of the square are collected, and the pond is communicated with a water outlet of a residential community without a rainwater drainage system; and overflow ports are arranged on the periphery of the pond and are communicated with the urban rainwater pipe network.
Fig. 5 is a schematic view of the structure of the water permeable floor around the building. This is a representative water-permeable ground structure, which gradually goes down from the building perimeter to the surrounding, and specifically includes a first-stage green land 21, a water-permeable pavement 22, a first-stage communication channel or gravel communication channel 23, a second-stage concave green land 24, a parking lot or square 25, a second-stage communication channel or gravel communication channel 26, and a third-stage concave green land 27.
Rainwater can flow to the periphery of a building 10 from the roof, and from a first-stage concave green land 21 to a distant third-stage concave green land 27 in front of a house and behind the house, the water-permeable paved road 22 flows to a far parking lot 25 or a third-stage concave green land 27 in a square, a broken stone communication channel I23 and a broken stone communication channel II 26 are respectively arranged under the water-permeable paved road 22 and the parking lot 25 or the square to communicate a plurality of green lands, the rainwater can flow from high to low, and a pond 28 lower than the concave green land for converging the rainwater is arranged in some squares.
The rainwater ecological planning on the ground is gradually perfected, but the water in the secondary concave greenbelt and pond is like the ponding on the ground, no complete underground rainwater infiltration system exists, the rainwater which is not infiltrated is discharged into the river, drought on the ground surface, insufficient water and insufficient water can be formed after long time, the underground water is submerged or exhausted, the planting is influenced, the vicious circle is formed, serious ecological unbalance is caused, particularly, the city with gradually increased buildings is formed, the rainwater infiltration is not carried out under the buildings, the water content of the underground soil layer is reduced, and how to infiltrate the rainwater by utilizing the building substrate to increase the underground water forms a rainwater ecological drainage system, so that the ecological rainwater ecological drainage system has become a big subject faced in the urban building setting.
Disclosure of Invention
Aiming at the problem that the underground water seepage area of a building is not fully utilized, the invention provides a rainwater ecological drainage system and a construction method thereof, and aims to organically combine the ground rainwater drainage system which is developed at present, extend the existing ground rainwater drainage system to the ground, fully utilize the drier phenomenon of the underground soil layer of the building, form a complete circulating rainwater ecological system with the ground, solve the problem of urban waterlogging, maintain the ecological balance of rainwater, relieve the shortage situation of underground water, reduce the damage of lives and property of people and improve the quality of human living environment.
The technical scheme of the invention is as follows: the ecological rainwater drainage system comprises a water seepage ground structure gradually falling from the periphery of a building to the periphery, a building foundation and a concrete cushion layer arranged on the foundation, wherein the water seepage ground structure comprises a multi-stage green land around the building, a plurality of water seepage wells leading to the ground are arranged in the water seepage ground, underdrain and a plurality of horizontally paved pipes are sequentially arranged from the bottom surface of the plurality of water seepage wells from high to low, the plurality of horizontally paved pipes are inlaid at the bottom of the concrete cushion layer arranged on the building foundation, a crushed stone soil layer or a water seepage pipe vertically arranged on the crushed stone soil layer is arranged below the plurality of horizontally paved pipes, and rainwater can flow into the building from the water seepage wells to the ground;
further, the infiltration well, the underdrain and the underdrain are filled with gravel bags or sand bags;
further, the plurality of horizontally laid pipes are horizontally-shaped pipes with small holes or gaps;
further, a protective cylinder is arranged on the periphery of the seepage well, an air outlet pipe is vertically arranged in the protective cylinder, the protective cylinder is higher than the peripheral ground, a top cover is arranged at the top end of the protective cylinder, and the top cover is of a grate structure;
further, the protective cylinder is a concrete pipe, a plastic pipe, a ceramic pipe or a stainless steel pipe, the upper end of the protective cylinder is higher than the ground, the lower end of the protective cylinder is inserted into the ground, and the upper end face of the protective cylinder is provided with a top cover;
further, the air outlet pipe is arranged in the middle of the infiltration well, the upper end of the air outlet pipe is consistent with the pile casing in height, and the lower end of the air outlet pipe extends to the underdrain;
further, at the joint of the pipes laid horizontally and the blind drain, the pipes laid horizontally and the bottom surface of the blind drain are at the same height,
further, the horizontal multiple pipes are arranged in any direction, two ends of the horizontal multiple pipes extend to the trench, the vertical multiple pipes are vertically arranged on the rammed soil layer, the lower ends of the vertical multiple pipes are pointed, and the pipe walls are provided with multiple holes.
The construction method of the rainwater ecological drainage system comprises the steps of:
1) Digging a building foundation pit, paving broken stone on the surface of the foundation pit or driving a seepage pipe, and tamping the broken stone into soil or tamping a foundation driven into the seepage pipe;
2) Setting a blind ditch around the foundation of the building;
3) Paving a plurality of pipes with small holes or gaps horizontally on a soil layer rammed with crushed stone or a foundation soil layer with a water seepage pipe, enabling the small holes or gaps to face to the top port of the crushed stone rammed soil layer or the water seepage pipe, enabling two ends of the plurality of pipes to extend to a blind ditch, and filling a crushed stone bag or a sand bag in the blind ditch;
4) Pouring a concrete cushion layer on a plurality of pipes paved on a foundation, embedding the pipes at the bottom of the concrete cushion layer, backfilling soil on a blind ditch after the underground part of a building is finished, and tamping the backfilling soil;
5) Digging an underdrain communicated with the underdrain, enabling the other end of the underdrain to be higher than the end communicated with the underdrain, arranging a broken stone bag or a sand bag in the underdrain, backfilling soil on the broken stone bag or the sand bag, and tamping;
6) The other end of the underdrain extends to the lower part of the water seepage ground or square, a water seepage well is dug to the underdrain on the water seepage ground or square, a vertical air outlet pipe is arranged in the water seepage well, broken stones, broken stone bags or sand bags are arranged on the periphery of the air outlet pipe, a protective barrel is arranged on the periphery of the water seepage well, the upper end of the protective barrel is higher than the ground or is equal to the surface of the square, and a grid-shaped top cover is fixed on the protective barrel.
Further, after rainwater in the seepage ground passes through the pile casing, the rainwater flows into the seepage well from the grate, flows into the crushed stone ramming soil or the seepage pipe along the seepage well, the underdrain, the bottom surface of the underdrain and a plurality of horizontally paved water pipes, and permeates into the underground of the building.
The invention has the positive effects that: the rainwater collected in the multi-stage greenbelt around the building can flow into the ground through the plurality of rainwater wells leading to the ground in the water seepage ground, so that the rainwater flooding on the ground, roads, front and rear rooms and other places is reduced, urban waterlogging caused by the rainwater is reduced or eliminated, and inconvenience and loss caused by the waterlogging are eliminated; through arranging underdrain, underdrain and a plurality of horizontally paved pipes from high to low in sequence on the bottom surfaces of a plurality of infiltration wells in the ground, rainwater flowing into the ground can be ensured to smoothly flow, an underground rainwater drainage system is formed, and the pressure of ground rainwater drainage can be relieved; the pipes laid horizontally are embedded at the bottom of the concrete cushion layer in the building foundation, so that the underground dry soil layer can absorb the overground rainwater on the premise of not influencing the building foundation, and the problems of excessive development of underground water, serious low underground water and tendency to exhaustion can be relieved; the broken stone ramming soil layer is arranged in the building foundation, so that when rainwater flows out of the horizontal pipes with small holes or gaps and is permeated into the ground, the disturbance of the underground soil layer caused by the rainwater flowing is reduced, or the vertical water seepage pipe is arranged in the building foundation, so that the disturbance of the underground soil layer caused by the rainwater flowing is reduced when the rainwater flows into the ground along the vertically arranged water seepage pipe; by filling the broken stone bags or sand bags in the seepage well, the underdrain and the underdrain, not only can the collapse of the ground caused by the hollow seepage well, the underdrain and the underdrain be prevented, but also the flow or the infiltration of rainwater can be facilitated, and a solid underground rainwater channel can be formed; through be provided with the protective casing in the protective casing periphery, be provided with the outlet duct perpendicularly in the protective casing, the protective casing exceeds its peripheral greenbelt, and the protective casing top is provided with the top cap, and the top cap is the comb structure, can guarantee on the one hand that the rainwater stores up certain water yield on the greenbelt, is favorable to utilizing green infiltration rainwater, in addition, can be with the rainwater volume that exceeds the protective casing through the protective casing inflow underground, simultaneously through setting up the outlet duct, is favorable to the outside emission of underground gas, is favorable to the smooth and easy flow of rivers on the one hand. Through setting up this kind of secret rainwater infiltration structure, with ground rainwater drainage system has formed a complete rainwater ecological drainage system, can improve the discharge ability of rainwater, reduces the urban waterlogging that the rainwater formed, provides convenient environment for resident's trip, can reduce the loss that causes because of the rainwater waterlogging, improves the natural disasters ability that the city should lead to of natural environment.
Drawings
FIG. 1 is a schematic sectional structure diagram of an ecological drainage system for underground rainwater of a crushed stone rammed soil layer.
FIG. 2 is a schematic cross-sectional view of an ecological rainwater drainage system under a water seepage pipe.
FIG. 3 is a schematic illustration of the connection and construction of an infiltration well to an underdrain.
Fig. 4 is one of the methods of laying a plurality of horizontally laid pipes.
FIG. 5 is a second method of laying a plurality of horizontally laid pipes.
Fig. 6 is a schematic plan view of an underground stormwater ecological drainage system.
Fig. 7 is a schematic plan distribution view of the above-ground rainwater ecological drainage system.
Description of the reference numerals: 10-building, 11-broken stone ramming soil layer, 11 a-ramming soil layer, 12-concrete cushion layer, 13-pipe, 14-underdrain, 15-underdrain, 16-infiltration well, 17-casing, 18-outlet pipe, 19-underground, 19 a-foundation pit, 20-infiltration pipe, 21-primary concave greenbelt, 22-infiltration paving road, 23-communication canal or broken stone communication canal one, 24-secondary concave greenbelt, 25-parking lot or square, 26-communication canal or broken stone communication canal two, 27-tertiary concave greenbelt, 28-pond.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
The technical scheme of the invention is that the rainwater ecological drainage system is shown in fig. 1, which is a schematic cross-sectional structure diagram of the underground rainwater ecological drainage system of a crushed stone rammed soil layer. FIG. 2 is a schematic cross-sectional view of an ecological rainwater drainage system under a seepage pipe.
The rainwater ecological drainage system comprises a water seepage ground structure gradually moving downwards from the periphery of a building 10 to the periphery, a foundation of the building 10 and a concrete cushion layer 12 arranged in the foundation, wherein the water seepage ground structure comprises a first-stage concave green and a second-stage concave green which are arranged in front of and behind a house, a plurality of water seepage wells 16 leading to the ground are arranged in the water seepage ground, underdrain 15, underdrain 14 and a plurality of horizontally paved pipes 13 are sequentially arranged from the bottom of the plurality of water seepage wells 16 from high to low, the plurality of horizontally paved pipes 13 are inlaid at the bottom of the concrete cushion layer 12 arranged in the foundation of the building 10, a crushed stone rammed soil layer 11 or a water seepage pipe 20 vertically arranged in a rammed soil layer 11a is arranged below the plurality of horizontally paved pipes 13, and rainwater can flow into the ground 19 from the bottom of the building 10;
the infiltration well 16, the underdrain 15 and the underdrain 14 are filled with gravel bags or sand bags.
The crushed stone ramming soil layer 11 is formed by paving crushed stone on a foundation and then pressing the crushed stone into the soil, wherein the crushed stone ramming soil layer 11 can permeate rainwater above the crushed stone ramming soil layer into the underground 19.
The water seepage pipes 20 are sequentially driven into the foundation pit 19a at a certain interval in the foundation pit 19a, and have an acute angle structure at the lower end for facilitating the driving of the foundation.
Fig. 3 is a schematic diagram of the connection and construction of an dewatering well with an underdrain. The periphery of the seepage well 16 is provided with a protective cylinder 17, an air outlet pipe 18 is vertically arranged in the protective cylinder 17, the protective cylinder 17 is higher than the periphery ground, the top end of the protective cylinder 17 is provided with a top cover, the top cover is of a grate structure, and the grate structure not only can enable water to flow into the seepage well 16, but also can filter weeds and prevent the seepage well 16 formed by broken stones from being blocked.
The pile casing 17 is a concrete pipe, a plastic pipe, a ceramic pipe or a stainless steel pipe, the upper end of the pile casing 17 is higher than the ground, the lower end of the pile casing 17 is inserted into the ground in an extending way, and the upper end face of the pile casing 17 is provided with a top cover;
further, the air outlet pipe 18 is arranged in the middle of the infiltration well 16, the upper end is consistent with the pile casing 17 in height, the lower end extends to the underdrain 15, and the air outlet pipe 18 can discharge underground air, so that smooth inflow of rainwater is facilitated.
Fig. 4 shows one of the methods for laying a plurality of horizontally laid pipes, and fig. 5 shows the other method for laying a plurality of horizontally laid pipes.
The plurality of horizontally laid pipes 13 are horizontally-shaped pipes 13 with small holes or gaps. After the crushed stone ramming soil layer 11 is horizontally paved, concrete is poured on the crushed stone ramming soil layer, so that a plurality of horizontal pipes 13 are embedded below the concrete cushion layer, holes are specially drilled or gaps are specially formed in the middle of the pipes for facilitating outflow of the pipes in rainwater, and the protection pipes can extend downwards to underdrain or can be arranged at any height on the height of a seepage well, so that the principle of firmness is adopted.
At the joint of the pipes 13 laid horizontally and the blind drain 14, the horizontal pipes 13 are at the same height as the bottom surface of the blind drain 14.
The arrangement direction of the plurality of horizontally paved pipes 13 is any direction, two ends of the pipes extend to the trench, the lower ends of the pipes are pointed, and the pipe walls are provided with a plurality of holes. FIG. 3 is a schematic sectional view of an ecological rainwater drainage system. Fig. 4 is a schematic sectional structure of the underground rainwater ecological drainage system.
The length of the plurality of horizontally laid pipes 13 is parallel to the side of the building 10 or at an angle to the adjacent side of the building 10.
The construction method of the rainwater ecological drainage system comprises the steps of:
1) Digging a foundation pit 19a of the building 10, paving broken stone on the surface of the foundation pit 19a or driving a seepage pipe 20, tamping the broken stone into soil or tamping a foundation driven into the seepage pipe 20;
2) Arranging an underdrain 14 around the foundation of the building 10;
3) Paving a plurality of pipes 13 with small holes or gaps horizontally on a soil layer rammed with crushed stone or a foundation soil layer with a water seepage pipe 20, enabling the small holes or gaps to face to the top port of the water seepage pipe 20, enabling two ends of the plurality of pipes 13 to extend to the blind drain 14, and filling a crushed stone bag or a sand bag in the blind drain 14;
4) Pouring a concrete cushion layer 12 on a plurality of pipes 13 paved on a foundation, embedding the pipes 13 at the bottom of the concrete cushion layer 12, backfilling soil on an underground ditch 14 after the underground part of the building is finished, and tamping the backfilled soil;
5) Then, excavating an underdrain 15 communicated with the underdrain 14, enabling the other end of the underdrain 15 to be higher than the end communicated with the underdrain 14, arranging a broken stone bag or a sand bag in the underdrain 15, adding backfill on the broken stone bag or the sand bag, and tamping;
6) Digging a water seepage well on a water seepage ground or square to an underdrain 15, arranging a vertical air outlet pipe 18 in the water seepage well 16, arranging broken stones or broken stone bags or sand bags around the air outlet pipe 18, arranging a protective barrel 17 around the water seepage well 16, enabling the upper end of the protective barrel 17 to be higher than a green surface or equal to the surface of the square, fixing a grid-shaped top cover on the protective barrel 17,
further, after the rainwater in the water seepage ground passes through the height of the pile casing 17, the rainwater flows into the water seepage well 16 from the grate, flows into the crushed stone rammed soil or the water seepage pipe 20 along the water seepage well 16, the underdrain 15, the bottom surface of the underdrain 14 and the plurality of horizontally paved water pipes, and permeates into the underground 19 of the building 10.
The ground penetrating greenbelt described herein includes a primary concave greenbelt 21, a secondary concave greenbelt 24, a tertiary concave greenbelt 27, and a pond 28.
According to the invention, the plurality of water seepage wells 16 leading to the underground are arranged in the water seepage ground, so that rainwater gathered in the multistage greenbelt around the building 10 can flow into the underground 19, the rainwater flooding of the ground, roads, front and rear houses and other places is reduced, urban waterlogging caused by the rainwater is reduced or eliminated, and inconvenience and loss caused by the waterlogging are eliminated; through arranging the underdrain 15, the underdrain 14 and the plurality of horizontally paved pipes 13 from high to low in the ground 19 from the bottom surfaces of the plurality of infiltration wells 16, the rainwater flowing into the ground 19 can be ensured to smoothly flow, an underground rainwater drainage system is formed, and the drainage pressure of the ground rainwater ecological system can be relieved; by embedding a plurality of horizontally paved pipes 13 at the bottom of the concrete cushion layer 12 in the foundation of the building 10, the underground dry soil layer can absorb the overground rainwater on the premise of not influencing the foundation of the building 10, and the problems of excessive development of underground 19 water, serious low and tendency to exhaustion of the underground 19 water can be relieved; by arranging the crushed stone ramming soil layer 11 in the foundation of the building 10, rainwater can flow out of the horizontal multiple pipes 13 with small holes or gaps to permeate into the underground 19 or flow into the underground 19 along the vertically arranged seepage pipe 20; by arranging the upright water seepage pipe 20 in the building foundation, disturbance of an underground soil layer caused by rainwater flowing is reduced when rainwater flows into the ground along the upright water seepage pipe 20; by filling the broken stone bags or sand bags in the infiltration well 16, the underdrain 15 and the underdrain 14, not only the collapse of the ground caused by the hollow infiltration well 16, the underdrain 15 and the underdrain 14 can be prevented, but also the flowing or infiltration of rainwater is facilitated, and a solid underground 19 rainwater channel can be formed; through be provided with the pile casing 17 in the infiltration well 16 periphery, be provided with outlet duct 18 in the pile casing 17 perpendicularly, pile casing 17 exceeds its peripheral ground, and pile casing 17 top is provided with the top cap, and the top cap is the comb structure, can guarantee on the one hand that the rainwater is on ground the storage space, in addition, on the one hand can be with the rainwater volume that exceeds pile casing 17 through pile casing 17 inflow underground 19, simultaneously through setting up outlet duct 18, is favorable to the outward emission of underground 19 gas, because the smooth flow of rivers. Through setting up this kind of secret rainwater infiltration structure, formed a complete rainwater ecological drainage system with overground rainwater structure, can improve the discharge ability of rainwater, reduce the urban waterlogging that the rainwater formed, provide convenient environment for resident's trip, can reduce the loss that causes because of the rainwater waterlogging, improve the natural disasters ability that the city should lead to of natural environment.
Claims (10)
1. The utility model provides a rainwater ecological drainage system, includes by the building periphery ground towards the infiltration ground structure of going gradually the low around, the concrete cushion that sets up on building foundation and the foundation, infiltration ground structure includes the multistage greenery patches around the building, its characterized in that: the underground water seepage system is characterized in that a plurality of underground water seepage wells are arranged in the water seepage ground, underdrain and a plurality of horizontally paved pipes are sequentially arranged from the bottom surface of the plurality of water seepage wells from high to low, the horizontally paved pipes are inlaid at the bottom of a concrete cushion layer arranged on a building foundation, a crushed stone rammed soil layer or a water seepage pipe vertically arranged on the rammed soil layer is arranged below the horizontally paved pipes, and rainwater can flow into the building bottom from the water seepage wells to infiltrate into the ground.
2. A stormwater ecological drainage system as claimed in claim 1, wherein: and broken stone bags or sand bags are filled in the seepage well, the underdrain and the underdrain.
3. A stormwater ecological drainage system as claimed in claim 1, wherein: the plurality of horizontally laid pipes are horizontally-shaped pipes with small holes or gaps.
4. A stormwater ecological drainage system as claimed in claim 1, wherein: the periphery of the seepage well is provided with a protective cylinder, an air outlet pipe is vertically arranged in the protective cylinder, the protective cylinder is higher than the periphery ground, the top end of the protective cylinder is provided with a top cover, and the top cover is of a grate structure.
5. A stormwater ecological drainage system as claimed in claim 4, wherein: the pile casing is a concrete pipe, a plastic pipe, a ceramic pipe or a stainless steel pipe, the upper end of the pile casing is higher than the ground, the lower end of the pile casing is inserted into the ground, and the upper end face of the pile casing is provided with a top cover.
6. A stormwater ecological drainage system as claimed in claim 4, wherein: the outlet duct sets up in the centre of infiltration well, and upper end and a pile casing highly agree, and the lower extreme extends to the underdrain.
7. A stormwater ecological drainage system as claimed in claim 1, wherein: the joints of the pipes laid horizontally and the blind ditches are positioned at the same height as the bottom surfaces of the blind ditches.
8. A stormwater ecological drainage system as claimed in claim 1, wherein: the arrangement direction of the pipes laid horizontally is any direction, two ends of the pipes extend to the trench, the lower ends of the pipes are pointed, and the pipe walls are provided with a plurality of holes.
9. A method of constructing a stormwater ecological drainage system comprising the stormwater ecological drainage system as claimed in any one of claims 1 to 8, characterized in that: the construction method of the rainwater ecological drainage system comprises the following steps of:
1) Digging a building foundation pit, paving broken stone on the surface of the foundation pit or driving a seepage pipe, and tamping the broken stone into soil or tamping a foundation driven into the seepage pipe;
2) Setting a blind ditch around the foundation of the building;
3) Paving a plurality of pipes with small holes or gaps horizontally on a soil layer rammed with crushed stone or a foundation soil layer with a water seepage pipe, enabling the small holes or gaps to face to the top port of the crushed stone rammed soil layer or the water seepage pipe, enabling two ends of the plurality of pipes to extend to a blind ditch, and filling a crushed stone bag or a sand bag in the blind ditch;
4) Pouring a concrete cushion layer on a plurality of pipes paved on a foundation, embedding the pipes at the bottom of the concrete cushion layer, backfilling soil on a blind ditch after the underground part of a building is finished, and tamping the backfilling soil;
5) Digging an underdrain communicated with the underdrain, enabling the other end of the underdrain to be higher than the end communicated with the underdrain, arranging a broken stone bag or a sand bag in the underdrain, backfilling soil on the broken stone bag or the sand bag, and tamping;
6) The other end of the underdrain extends to the lower part of the water seepage ground or square, a water seepage well is dug to the underdrain on the water seepage ground or square, a vertical air outlet pipe is arranged in the water seepage well, broken stones, broken stone bags or sand bags are arranged on the periphery of the air outlet pipe, a protective barrel is arranged on the periphery of the water seepage well, the upper end of the protective barrel is higher than the ground or is equal to the surface of the square, and a grid-shaped top cover is fixed on the protective barrel.
10. The construction method of the rainwater ecological drainage system according to claim 9, wherein: after rainwater in the water seepage ground passes through the pile casing, the rainwater flows into the water seepage well from the grate, flows into the broken stone ramming soil or the water seepage pipe along the bottom surfaces of the water seepage well, the underdrain and a plurality of water pipes laid horizontally, and permeates into the underground of a building.
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| CN109457792B (en) * | 2018-11-08 | 2024-02-27 | 安阳师范学院 | A courtyard rainwater collection and purification structure |
| CN111677346A (en) * | 2020-06-19 | 2020-09-18 | 同济大学建筑设计研究院(集团)有限公司 | Spatial layout method suitable for city update construction |
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