CN108222216A - A kind of rainwater ecological exhaust system and its construction method - Google Patents

Abstract

A kind of rainwater ecological exhaust system and its construction method,Belong to civic building field,Multiple filter wells towards underground are provided in the infiltration ground,Closed conduit is provided with from high to low successively from multiple filter well bottom surfaces,Underdrain,The more horizontal pipes being laid with,The more horizontal pipes being laid with are embedded in the concrete cushion bottom set in structure foundation,For rubble rammed earth layer or the soakaway trench of rammed earth layer is vertically set below the more horizontal pipes being laid with,Rainwater can flow into building bottom from filter well and permeate the ground,This subsurface stormwater infiltration structure,A kind of complete rainwater ecological exhaust system is formd with ground rainwater structure,The discharge capacity of rainwater can be improved,Reduce the urban waterlogging that rainwater is formed,Convenient environment is provided for resident trip,It can reduce and be lost caused by rainwater waterlogging,Natural calamity ability caused by improving city reply natural environment.

Description

A rainwater ecological drainage system and its construction method

technical field

The invention relates to a rainwater discharge system and a construction method thereof, in particular to a rainwater ecological discharge system and a construction method thereof, belonging to the field of municipal buildings.

Background technique

With the development of industrialization and urbanization, the increase of carbon emissions and the destruction of the ozone layer have brought about the increase of the temperature of the earth's surface and the increase of rainwater, which often causes urban waterlogging due to poor drainage, which affects urban traffic and brings benefits to the people. Life and production have brought impacts, brought great pollution to the living environment, and even brought property losses and the cost of lives.

In recent years, with the occurrence of environmental pollution, natural disasters and man-made disasters, people are constantly reflecting, and they are constantly paying attention to protecting the environment, maintaining ecological balance, and building an environment-friendly city.

As far as the ground drainage system is concerned, planted roofs are installed on the roof, grass planting ditch is set in the green space to facilitate the circulation of rainwater, permeable pavement is set in the road, and a first-level concave green space is set in front of and behind the house. The road far behind the house and the parking lot are set up with a lower-elevation second-level sunken green space, and connect the first-level sunken green space with the second-level sunken green space, and set up rainwater flow underpasses when encountering roads; Set up rain gardens or ponds that are lower than the sunken green space around the square to collect rain water gardens or ponds from the sunken green space, parking lot, and square. In residential quarters that do not have rainwater drainage systems, set the ponds with the drainage outlets of the residential quarters. Connectivity: Set up overflow outlets around the pond to connect the overflow outlets with the urban rainwater pipe network.

Fig. 5 Schematic diagram of seepage ground structure around buildings. This is a representative water seepage ground structure, which gradually decreases from the ground around the building to the surrounding area, specifically including the first-level green space 21, the seepage paved road 22, the connecting channel or gravel connecting channel 1 23, the second-level concave green space 24, Parking lot or square 25, connecting canal or crushed stone connecting canal 2 26, third-level concave green space 27.

Rainwater can flow to building 10 periphery from building roof, from the one-level sunken green space 21 of house front and rear to the third-level concave green space 27 in the distance, through being provided with permeable paved road 22, flow to far away parking lot 25 or square In the three-level concave green space 27 in the middle, the seepage paved road 22 and the parking lot 25 or the square are respectively provided with a crushed stone connecting channel 1 23 and a crushed stone connecting channel 2 26 to communicate between a plurality of green spaces, and the rainwater can be drained by high Flowing to the lowlands, some squares are provided with ponds 28 lower than the sunken green space for collecting rainwater.

The ecological planning of rainwater on the ground is gradually improving. However, like the accumulated water on the surface, the water in the second-level concave green space, and the water in the pond, there is no complete underground rainwater infiltration system, and the rainwater that cannot penetrate is only discharged into the river. It will cause surface drought, water shortage, groundwater sinking or depletion, affecting planting, forming a vicious circle, leading to serious ecological imbalance, especially in cities with gradually increasing buildings, there is no rainwater infiltration under the buildings, and the underground soil layer contains As the amount of water decreases, how to use the building base to infiltrate rainwater, increase groundwater, and form an ecological rainwater discharge system has become a major issue in urban architectural settings.

Contents of the invention

Aiming at the problem that the underground seepage area of buildings is not fully utilized, the present invention provides a rainwater ecological drainage system and its construction method, the purpose of which is to organically combine the currently developed ground rainwater drainage system and integrate Extend to the ground, and make full use of the phenomenon that the underground soil layer of the building is relatively dry, forming a complete circulating rainwater ecosystem with the ground, solving the problem of urban waterlogging, maintaining the ecological balance of rainwater, alleviating the tension of groundwater, and reducing the damage to people's lives and property , Improve the quality of human living environment.

The technical solution of the present invention is: an ecological rainwater discharge system, including a water seepage ground structure that gradually descends from the surrounding ground of the building to the surrounding, the building foundation and the concrete cushion provided on the foundation, the water seepage ground structure includes multiple structures around the building Level green land, the seepage ground is provided with a plurality of seepage wells leading to the ground, and from the bottom of the plurality of seepage wells, there are culverts, culverts, and multiple horizontally laid pipes in sequence from high to low, and the multiple horizontally laid pipes are inlaid At the bottom of the concrete cushion set on the foundation of the building, under a number of horizontally laid pipes is a gravel rammed earth layer or a water seepage pipe vertically arranged on the rammed earth layer, and the rainwater will flow into the bottom of the building from the seepage well and seep into the ground;

Further, gravel bags or sandbags are filled in the seepage wells, culverts, and culverts;

Further, the multiple horizontally laid pipes are horizontal multiple pipes with small holes or gaps;

Further, the periphery of the seepage well is provided with a casing, and an air outlet pipe is vertically arranged in the casing, and the casing is higher than the surrounding ground, and a top cover is provided at the top of the casing, and the top cover is a grate structure;

Further, the casing is a concrete pipe, plastic pipe, pottery pipe or stainless steel pipe, the upper end of the casing is higher than the ground, the lower end is inserted into the ground, and the upper end of the casing is provided with a top cover;

Further, the air outlet pipe is arranged in the middle of the seepage well, the upper end is at the same height as the casing, and the lower end extends to the underdrain;

Further, at the junction of multiple horizontally laid pipes and the underground ditch, the multiple horizontally laid pipes are at the same height as the bottom of the underground ditch,

Further, the installation direction of the multiple horizontal pipes is any direction, and both ends extend to the ditch, and the seepage pipes vertically arranged in the rammed earth layer have a pointed lower end and a plurality of pores on the pipe wall.

A construction method of a rainwater ecological discharge system, including the above-mentioned rainwater ecological discharge system, the construction method of the rainwater ecological discharge system is constructed according to the following steps:

1) Excavate the foundation pit of the building, lay gravel on the surface of the foundation pit or drive into the seepage pipe, ram the gravel into the soil or compact the foundation driven into the seepage pipe;

2) Set up a dark ditch around the foundation of the building;

3) Lay multiple pipes with small holes or gaps horizontally on the soil layer rammed into gravel or on the foundation soil layer with seepage pipes, and make the small holes or gaps face the layer of crushed stone or rammed earth The top port of the seepage pipe, the two ends of multiple pipes extend to the underground ditch, and fill the gravel bag or sandbag in the underground ditch;

4) Pour a concrete cushion on the multiple pipes laid on the foundation, so that the multiple pipes are embedded at the bottom of the concrete cushion. After the underground part of the building is completed, backfill the soil on the underground ditch and tamp the backfill;

5) Excavate the underground ditch connected with the underground ditch so that the other end of the underground ditch is higher than the end connected with the underground ditch, and set gravel bags or sandbags in the underground ditch, backfill the gravel bags or sandbags, and compact them;

6) The other end of the culvert extends to the seepage ground or below the square, dig a seepage well to the culvert on the seepage ground or square, set a vertical air outlet pipe in the seepage well, set gravel, gravel bags or sandbags around the air outlet pipe, and set up around the seepage well Casing, the casing upper end is raised above the ground or is as high as the surface of the square, and a grate-shaped top cover is fixed on the casing.

Furthermore, after the rainwater in the seepage ground overflows the height of the casing, it flows from the grate into the seepage well, along the bottom of the seepage well, culvert, culvert and multiple water pipes laid horizontally, flows into the gravel rammed soil or seepage pipe, and infiltrates into the underground of the building .

The positive effect of the present invention is: by setting a plurality of seepage wells leading to the ground in the seepage ground, the rainwater gathered in the multi-level green space around the building can flow into the ground, reducing the amount of water on the ground, roads, front and back of the house. The flooding of rainwater in other places reduces or eliminates the urban waterlogging caused by rainwater, and eliminates the inconvenience and loss caused by waterlogging; through the underground from the bottom of multiple seepage wells in order from high to low, there are underground drains, underground ditches, and multiple root levels. The laid pipes can ensure the smooth flow of rainwater flowing into the ground, forming an underground rainwater drainage system, which can relieve the pressure of ground rainwater discharge; by embedding multiple horizontally laid pipes at the bottom of the concrete cushion in the building foundation, Under the premise of not affecting the foundation of the building, the underground dry soil layer can absorb the rainwater on the ground, which can alleviate the problems of over-exploitation of groundwater, serious low groundwater and tending to depletion; When the rainwater flows out from the horizontal pipes with small holes or gaps, the rainwater penetrates into the ground, reducing the disturbance of the underground soil layer caused by the flow of rainwater, or by setting vertical seepage pipes in the foundation of the building, which is beneficial When the rainwater flows into the ground along the vertical seepage pipes, the disturbance of the underground soil layer caused by the flow of rainwater is reduced; by filling the seepage wells, culverts, and culverts with gravel bags or sandbags, not only can the empty seepage wells, culverts, and culverts be prevented Causes the ground to collapse, and is conducive to the flow or infiltration of rainwater, and can form a solid underground rainwater channel; by setting a casing around the seepage well, an air outlet pipe is vertically arranged in the casing, and the casing is higher than its surroundings For the green space, the top of the casing is provided with a top cover, which is a grate structure. On the one hand, it can ensure that a certain amount of rainwater accumulates on the green space, which is conducive to the use of green ground to infiltrate rainwater. It flows into the ground through the casing, and at the same time, by setting the air outlet pipe, it is conducive to the outward discharge of underground gas and the smooth flow of water. By setting up this underground rainwater infiltration structure, it forms a complete rainwater ecological drainage system with the above-ground rainwater drainage system, which can improve the drainage capacity of rainwater, reduce urban waterlogging caused by rainwater, provide a convenient environment for residents to travel, and reduce the risk of pollution. The loss caused by rainwater inundation improves the city's ability to deal with natural disasters caused by the natural environment.

Description of drawings

Fig. 1 Schematic diagram of the cross-sectional structure of the underground rainwater ecological drainage system in the gravel rammed earth layer.

Fig. 2 Schematic diagram of the cross-sectional structure of the seepage pipe underground rainwater ecological drainage system.

Fig. 3 Schematic diagram of the connection and structure of the seepage well and the culvert.

Figure 4 One of the laying methods for multiple horizontally laid pipes.

Fig. 5 The second laying method of multiple horizontally laid pipes.

Figure 6 is a schematic plan view of an underground rainwater ecological drainage system.

Fig. 7 Plane distribution schematic diagram of aboveground rainwater ecological drainage system.

Explanation of symbols: 10-building, 11-rammed earth layer of gravel, 11a-rammed earth layer, 12-concrete cushion, 13-pipe, 14-underdrain, 15-underdrain, 16-seepage well, 17-casing, 18-Outlet pipe, 19-Underground, 19a-Foundation pit, 20-Seepage pipe, 21-First-level concave green space, 22-Water seepage paved road, 23-Connecting channel or gravel connecting channel 1, 24-Secondary concave Type green space, 25-parking lot or square, 26-connecting channel or gravel connecting channel 2, 27-three-level concave green space, 28-pond.

Detailed ways

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

The technical solution of the present invention is an ecological rainwater discharge system, and Fig. 1 is a schematic cross-sectional structure diagram of the underground rainwater ecological discharge system in a gravel rammed earth layer. Figure 2 is a cross-sectional schematic diagram of the seepage pipe underground rainwater ecological drainage system.

The rainwater ecological drainage system includes a seepage ground structure gradually lowering from the surrounding ground of the building 10 to the surroundings, the foundation of the building 10 and the concrete cushion 12 set in the foundation, and the seepage ground structure includes a first-class sunken green space in front of the house and behind the house, Second-level concave green land, the seepage ground is provided with a plurality of seepage wells 16 leading to the ground, and from the bottom of the plurality of seepage wells 16, there are culverts 15, culverts 14, and a plurality of horizontally laid pipes from high to low. 13. A plurality of horizontally laid pipes 13 are inlaid at the bottom of the concrete cushion 12 set in the foundation of the building 10. Below the plurality of horizontally laid pipes 13 is the gravel rammed earth layer 11 or the water seepage pipe vertically arranged in the rammed earth layer 11a 20. Rainwater will flow from the seepage well 16 into the bottom of the building 10 and infiltrate into the ground 19;

Gravel bags or sandbags are filled in the seepage well 16, the underdrain 15, and the underdrain 14.

The gravel rammed earth layer 11 is laid gravel on the foundation, and then the crushed stone is pressed into the soil, and the crushed stone rammed earth layer 11 can infiltrate the rainwater above into the underground 19 .

The seepage pipe 20 is driven into the foundation pit 19a sequentially according to a certain interval, and in order to facilitate driving into the foundation, the lower end has an acute-angled structure.

Figure 3 is a schematic diagram of the connection and structure of the seepage well and the culvert. A casing 17 is arranged on the periphery of the seepage well 16, and an air outlet pipe 18 is vertically arranged in the casing 17. The casing 17 is higher than the surrounding ground, and a top cover is arranged on the top of the casing 17, and the top cover is a grate structure. Water can flow into the seepage well 16, and weeds can be filtered to prevent the seepage well 16 made of gravel from being blocked.

The casing 17 is a concrete pipe, a plastic pipe, a pottery pipe or a stainless steel pipe, the upper end of the casing 17 is higher than the ground, and the lower end is inserted into the ground, and the upper end of the casing 17 is provided with a top cover;

Further, the air outlet pipe 18 is arranged in the middle of the seepage well 16, the upper end is at the same height as the casing 17, and the lower end extends to the underdrain 15. The air outlet pipe 18 can discharge the underground gas, which is conducive to the smooth inflow of rainwater.

Figure 4 is one of the laying methods of multiple horizontally laid pipes, and Figure 5 is the second laying method of multiple horizontally laid pipes.

The multiple horizontally laid pipes 13 are horizontal multiple pipes 13 with small holes or slits. After laying horizontally on the gravel rammed earth layer 11, concrete is poured on it, so that multiple horizontal pipes 13 are embedded under the concrete cushion. In order to facilitate the flow of rainwater from the middle of the pipes, it is necessary to drill holes in the middle of the pipes Or start a gap, the protective pipe can extend down to the culvert, and can also be set at any height above the height of the seepage well, based on the principle of firmness.

A plurality of horizontally laid pipes 13 are connected to the underground ditch 14, and the plurality of horizontal pipes 13 and the bottom surface of the underground ditch 14 are at the same height.

The arrangement direction of the plurality of horizontally laid pipes 13 is any direction, and both ends extend to the trench. The seepage pipes vertically arranged in the rammed earth layer have a pointed lower end and a plurality of pores on the pipe wall. Fig. 3 is a cross-sectional schematic diagram of the underground rainwater ecological drainage system. Figure 4 is a cross-sectional schematic diagram of the underground rainwater ecological drainage system.

The length direction of the plurality of horizontally laid pipes 13 is parallel to the side length of the building 10 or has a certain angle with the adjacent side length of the building 10 .

A construction method of a rainwater ecological discharge system, including the above-mentioned rainwater ecological discharge system, the construction method of the rainwater ecological discharge system is constructed according to the following steps:

1) Excavate the foundation pit 19a of the building 10, lay gravel on the surface of the foundation pit 19a or drive into the seepage pipe 20, ram the gravel into the soil or compact the foundation of the seepage pipe 20;

2) Set up a dark ditch 14 around the foundation of the building 10;

3) Lay a plurality of pipes 13 with small holes or gaps horizontally on the soil layer rammed into gravel or on the foundation soil layer with seepage pipes 20 driven into them, and make the small holes or gaps face the top of the seepage pipes 20 port, the two ends of multiple pipes 13 extend to the dark ditch 14, and fill the gravel bag or sandbag in the dark ditch 14;

4) Concrete cushion 12 is poured on the multiple pipes 13 laid on the foundation, so that the multiple pipes 13 are inlaid at the bottom of the concrete cushion 12. After the underground part of the building is completed, soil is backfilled on the underground ditch 14, and the compaction of backfill soil;

5) Excavate the underdrain 15 connected with the underdrain 14 again, so that the other end of the underdrain 15 is higher than the end connected with the underditch 14, and set gravel bags or sandbags in the underdrain 15, add backfill soil on the gravel bags or sandbags, and tamp;

6), dig the seepage well to the underdrain 15 on the seepage ground or square, set a vertical air outlet pipe 18 in the seepage well 16, set gravel or gravel bags or sandbags around the air outlet pipe 18, and set a casing 17 around the seepage well 16, Make the casing 17 upper end higher than the green surface or the same height as the surface of the square, and fix the grate shape top cover on the casing 17,

Further, after the rainwater in the seepage ground overflows the height of the casing 17, it flows into the seepage well 16 from the grate, and flows into the gravel rammed into the soil or the seepage pipe along the bottom surface of the seepage well 16, the culvert 15, the culvert 14 and the horizontally laid multiple water pipes. 20. Infiltrate the building 10 underground 19.

The ground seepage green space described here includes a first-level concave green space 21 , a second-level concave green space 24 , a third-level concave green space 27 and a pond 28 .

The present invention is provided with a plurality of seepage wells 16 leading to the ground in the seepage ground, so that the rainwater gathered in the multi-level green space around the building 10 can flow into the underground 19, reducing the water pollution on the ground, roads, houses, etc. The flooding of rainwater reduces or eliminates the urban waterlogging caused by rainwater, and eliminates the inconvenience and loss caused by waterlogging; through the bottom surface of multiple seepage wells 16 in the underground 19, there are culverts 15, culverts 14, and multiple roots in order from high to low. The horizontally laid pipes 13 can ensure the smooth flow of rainwater flowing into the underground 19, forming an underground rainwater drainage system, which can relieve the discharge pressure of the ground rainwater ecosystem; The bottom of the middle concrete cushion 12 can absorb the above-ground rainwater in the underground dry soil layer without affecting the foundation of the building 10, which can alleviate the problems of over-exploitation of underground 19 water, serious low level of underground 19 water and tending to depletion; through The crushed stone rammed earth layer 11 is set in the foundation of the building 10, which is conducive to the rainwater flowing out from the horizontal multiple pipes 13 with small holes or gaps. The rainwater penetrates into the underground 19 or flows into the underground 19 along the vertical seepage pipe 20 ; By setting the vertical seepage pipe 20 in the building foundation, it is beneficial to reduce the underground soil layer disturbance caused by the rainwater flow when the rainwater flows into the ground along the vertical seepage pipe 20; Gravel bags or sandbags are filled in it, which can not only prevent the hollow seepage wells 16, culverts 15, and culverts 14 from causing ground collapse, but also facilitate the flow or infiltration of rainwater, and can form a solid underground rainwater channel; A casing 17 is arranged around the seepage well 16, and an air outlet pipe 18 is vertically arranged in the casing 17. The casing 17 is higher than the surrounding ground, and a top cover is arranged on the top of the casing 17, and the top cover is a grate structure. On the one hand, it can ensure The storage capacity of rainwater on the ground, in addition, on the one hand, the rainwater volume higher than the casing 17 can flow into the underground 19 through the casing 17, and at the same time, by arranging the air outlet pipe 18, it is beneficial to discharge the gas of the underground 19, due to the flow of water Easy flow. By setting this underground rainwater infiltration structure, it forms a complete rainwater ecological discharge system with the above-ground rainwater structure, which can improve the rainwater discharge capacity, reduce urban waterlogging caused by rainwater, provide a convenient environment for residents to travel, and reduce the rainwater caused by rainwater. Losses caused by waterlogging can improve the city's ability to deal with natural disasters caused by the natural environment.

Claims (10)

1. a kind of rainwater ecological exhaust system, including from building surrounding ground to the infiltration ground structure around gradually to drop, The concrete cushion set on structure foundation and ground, infiltration ground structure includes the multistage greenery patches around building, special Sign is：Multiple filter wells towards underground are provided in the infiltration ground, from multiple filter well bottom surfaces successively from high to low Closed conduit, underdrain, the more horizontal pipes being laid with are provided with, the more horizontal pipes being laid with are embedded in what is set on structure foundation Concrete cushion bottom for rubble rammed earth layer or is vertically set on the soakaway trench of rammed earth layer below the more horizontal pipes being laid with, Rainwater can flow into building bottom from filter well and permeate the ground.

2. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The filter well, closed conduit, underdrain In be filled with rubble bag or sandbag.

3. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The described more horizontal pipes being laid with Son is the horizontal more pipes with aperture or gap.

4. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The periphery setting of the filter well There is casing, air outlet pipe is vertically installed in casing, casing is higher by its surrounding ground, and casing top is provided with head cover, and head cover is combs Minor structure.

5. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The casing for pipe of concrete, Plastic tube, stoneware pipe or stainless steel tube, casing upper end is above ground level, and ground is inserted into lower end, and casing upper surface is provided with head cover.

6. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The air outlet pipe is arranged on infiltration Among well, upper end is highly consistent with casing, and lower end extends to closed conduit.

7. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The more horizontal pipes being laid with Underdrain junction, the more horizontal pipes being laid with are with underdrain bottom surface on sustained height.

8. a kind of rainwater ecological exhaust system according to claim 1, it is characterised in that：The horizontal more pipes Setting direction is any direction, and trench, the soakaway trench for being vertically set on rammed earth layer are stretched in both ends, and lower end is pointed, tube wall On have multiple holes.

9. a kind of construction method of rainwater ecological exhaust system, includes the rainwater ecological exhaust system of above-mentioned power 1-8, feature exists In：The construction method of the rainwater ecological exhaust system follows the steps below construction：

1）Building foundation pit is excavated, rubble is laid on foundation pit surface or squeezes into soakaway trench, rubble is rammed into soil or tamped and is squeezed into The ground of soakaway trench；

2) underdrain is set on structure foundation periphery；

3）On the soil layer of rubble is rammed into or on having the foundation soil for squeeze into soakaway trench it is horizontal be laid with it is more with aperture or gap Root pipe, and make its aperture or gap more pipe both ends extend to underdrain towards rubble rammed earth layer or soakaway trench top port, Rubble bag or sandbag are filled up in underdrain；

4）Casting concrete bed course on more pipes being laid on ground, makes more pipes be embedded in concrete cushion bottom, After the completion of building under ground portion, the backfill on underdrain, and to backfilling rammed earth；

5）The closed conduit connected with underdrain is excavated, the other end of closed conduit is made to be higher than the one end connected with underdrain, and set in closed conduit Put rubble bag or sandbag, backfill on rubble bag or sandbag, and tamp；

6）The other end of closed conduit is extended to below infiltration ground or square, and filter well is dug to closed conduit in infiltration ground or square, is oozing Vertical air outlet pipe is set in well, and air outlet pipe periphery sets rubble, rubble bag or sandbag, sets casing around filter well, make Casing upper end is above ground level or contour with square surface, and double-edged fine-toothed comb shape head cover is fixed on casing.

10. a kind of construction method of rainwater ecological exhaust system according to claim 9, it is characterised in that：Infiltration ground After middle rainwater covers casing height, filter well is flowed into from double-edged fine-toothed comb, along filter well, closed conduit, the bottom surface of underdrain and horizontal paving If more water pipes flow into rubble and be rammed into soil or soakaway trench, penetrate into building underground.