Soil amendment type rainwater bioretention

Abstract

The utility model belongs to rainwater management technical field discloses soil improvement type rainwater biological retention facility, including sidewalk and driveway, sidewalk and driveway are connected with biological retention ditch, biological retention ditch is connected with drain pipe, and biological retention ditch is provided with drainage, drainage is connected with drain pipe, and drainage inwall is connected with support net, and support net top is equipped with drainage layer, and drainage layer top is equipped with transition layer, and transition layer top is equipped with soil layer, and soil layer top is equipped with vegetation layer, and biological retention ditch is connected with overflow pipe, and overflow pipe is connected with drain pipe, and overflow pipe is far away from drain pipe one end and passes through soil layer and vegetation layer, and overflow pipe is connected with frame, and frame is connected with filter screen, and frame rotatory joint has the pivot, and the both ends of pivot are connected with drive vane and cleaning brush respectively. The utility model improves the drainage efficiency at the time of heavy rain through multiple drainage design, reduces the road waterlogging risk.

Description

Technical Field

[0001] This utility model relates to the field of rainwater management technology, and in particular to a soil-modified rainwater bioretention facility. Background Technology

[0002] Rainwater bioretention facilities, as an effective rainwater management technology, can reduce rainwater runoff and improve water quality through retention, infiltration, and purification.

[0003] However, when it rains heavily, the facility is slow to seep water, and rainwater has to pass through the soil layer, transition layer and drainage layer in sequence before it can be drained away. The accumulated water will overflow the bioretention facility, which can easily cause waterlogging on the road. Utility Model Content

[0004] The present invention aims to provide a soil-modified rainwater bioretention facility to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A soil-modified rainwater bioretention facility includes a sidewalk and a driveway, with a bioretention ditch connecting the sidewalk and driveway. The bioretention ditch is connected to a drain pipe, and the bioretention ditch has a drain outlet connected to the drain pipe. A support net is connected to the inner wall of the drain outlet, a drainage layer is provided on top of the support net, a transition layer is provided on top of the drainage layer, a soil layer is provided on top of the transition layer, and a vegetation layer is provided on top of the soil layer. An overflow pipe is connected to the bioretention ditch and is connected to the drain pipe. The end of the overflow pipe away from the drain pipe passes through the soil layer and the vegetation layer. The overflow pipe is connected to a frame, and a filter screen is connected to the frame. The frame is rotatably connected to a shaft, and drive blades and a cleaning brush are respectively connected to both ends of the shaft. The cleaning brush cooperates with the filter screen.

[0007] Preferably, the bioretention trench is connected to a partition.

[0008] Preferably, the frame is connected to a mounting frame, which is threadedly connected to the overflow pipe.

[0009] Preferably, the overflow pipes are provided in several groups, the groups of overflow pipes are symmetrically arranged, and the groups of overflow pipes are respectively close to the sidewalk and the roadway.

[0010] Preferably, there is a first height difference between the top surface of the vegetation layer and the top surface of the sidewalk, and a second height difference between the top surface of the vegetation layer and the top surface of the roadway, wherein the values ​​of the first height difference and the second height difference are both in the range of 15cm-30cm.

[0011] Preferably, the top surface of the filter screen is on the same horizontal plane as the top surface of the sidewalk and the top surface of the driveway.

[0012] Preferably, the soil layer is made of a mixture of sandy loam, humus and clay.

[0013] Preferably, the soil layer has a thickness of 30cm-60cm, the transition layer has a thickness of 10cm-20cm, and the drainage layer has a thickness of 25cm-30cm.

[0014] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0015] (1) This technical solution achieves rainwater purification and infiltration through a layered structure consisting of a vegetation layer, a soil layer, a transition layer, and a drainage layer. Simultaneously, the overflow pipe facilitates drainage, balancing the needs for rainwater purification and rapid discharge. The filter screen prevents impurities from clogging the overflow pipe, while the drive blades, driven by the water flow, automatically clean the filter screen with a cleaning brush, ensuring the unobstructed flow of the overflow channel during heavy rain. The support net provides stable support for the drainage layer. The overall structure, through multiple drainage designs, improves drainage efficiency during heavy rain and reduces the risk of road flooding.

[0016] (2) By setting up partitions, the bioretention ditch can be divided into sections to avoid excessive water flow in the ditch during heavy rain and reduce the erosion and damage to the soil and vegetation layers.

[0017] (3) By setting the installation frame to connect with the overflow pipe filter screen, the installation and disassembly of the frame, filter screen, cleaning brush and other components are simple, making it easy to regularly perform deep cleaning of the filter screen and replace damaged parts, thus reducing maintenance difficulty and cost.

[0018] (4) By setting up several sets of symmetrical overflow pipes that are close to the sidewalk and the roadway respectively, rainwater can be diverted from both sides simultaneously during heavy rain, greatly improving the overflow drainage efficiency and avoiding the problem of drainage lag caused by excessive load on one side of the overflow pipe.

[0019] (5) By setting a height difference of 15cm-30cm between the top surface of the vegetation layer and the top surface of the sidewalk and driveway, a natural drainage slope can be formed, allowing rainwater to flow naturally into the bioretention ditch by gravity. This can efficiently collect runoff without additional power, reducing the initial accumulation of water on the road surface. It also provides sufficient buffer space for rainwater to infiltrate and purify in the vegetation and soil layers, taking into account both collection efficiency and purification effect.

[0020] (6) By setting the top surface of the filter screen to be at the same level as the top surface of the sidewalk and the roadway, it can avoid the filter screen protruding and affecting the passage of pedestrians and vehicles. It can also make the excessive rainwater on the road surface quickly contact the filter screen and be discharged through the overflow pipe in the early stage of overflow, reducing the residence time of rainwater on the ground surface and further improving the drainage response speed during heavy rain.

[0021] (7) By setting up a soil layer made of sandy loam, humus and clay, the problem of poor permeability or insufficient purification capacity of single soil is solved, and a suitable physical and chemical environment is provided for the growth of plant roots, ensuring the high efficiency and stability of the facility in water storage, infiltration and purification functions.

[0022] (8) By setting the soil layer thickness to 30cm-60cm, the transition layer thickness to 10cm-20cm, and the drainage layer thickness to 25cm-30cm, it can provide sufficient growth space for plant roots to meet their needs for nutrient and water absorption, and ensure that rainwater has sufficient paths to fully contact soil particles and microorganisms during infiltration, and deeply purify rainwater through adsorption, decomposition and other effects; effectively block fine particles in the soil layer from entering the drainage layer to avoid blockage of drainage channels, while its fine structure can perform secondary filtration of rainwater; and provide sufficient space for rapid infiltration of rainwater, which can ensure sufficient rainwater purification and take into account drainage efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a front sectional view of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of point A;

[0026] Attached reference numerals: 1. Sidewalk, 2. Bioretention ditch, 3. Drainage pipe, 4. Support net, 5. Drainage outlet, 6. Drainage layer, 7. Transition layer, 8. Soil layer, 9. Vegetation layer, 10. Overflow pipe, 11. Frame, 12. Driveway, 13. Filter screen, 14. Partition, 15. Shaft, 16. Cleaning brush, 17. Drive blade, 18. Mounting frame. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0028] like Figure 1-3The soil-modified rainwater bioretention facility shown includes a sidewalk 1 and a driveway 12. A bioretention ditch 2 connects the sidewalk 1 and the driveway 12. A partition 14 connects to the inner wall of the bioretention ditch, dividing it into sections. A drainage pipe 3 connects to the bottom of the bioretention ditch 2, and a drainage outlet 5 is located at the lowest point of the ditch 2, connected to the drainage pipe 3. A support net 4 connects to the inner wall of the drainage outlet 5. A drainage layer 6, made of gravel or crushed stone and 25-30 cm thick, is laid on top of the support net 4. A transition layer 7, made of sand or fine gravel and 10-20 cm thick, is laid on top of the drainage layer 6. A soil layer 8, composed of a mixture of sandy loam, humus, and clay, is laid on top of the transition layer 7 and 30-60 cm thick. A vegetation layer 9 is planted on top of the soil layer 8. There is a first height difference between the top surface of the vegetation layer 9 and the top surface of the sidewalk 1, and a second height difference between the top surface of the vegetation layer 9 and the top surface of the roadway 12. The values ​​of the first height difference and the second height difference are both in the range of 15cm-30cm.

[0029] like Figure 1-3 As shown, several sets of overflow pipes 10 are connected to the left and right side walls of the bioretention ditch 2. The overflow pipes 10 are located near the sidewalk 1 and the driveway 12, respectively. The bottom end of the overflow pipe 10 is connected to the drainage pipe 3, and the top end of the overflow pipe 10 passes through the soil layer 8 and the vegetation layer 9, and is threadedly connected to the mounting frame 18. The inner side wall of the mounting frame 18 is connected to the frame 11, and the frame 11 is connected to the filter screen 13. The top surface of the filter screen 13 is on the same horizontal plane as the top surface of the sidewalk 1 and the top surface of the driveway 12. The frame 11 is rotatably connected to the center of the frame 11. The top end of the rotating shaft 15 is located above the filter screen 13 and is connected to the cleaning brush 16, the bristles of the cleaning brush 16 being in contact with the filter screen 13. The bottom end of the rotating shaft 15 is located below the filter screen 13 and is connected to the drive blade 17.

[0030] During rainfall, rainwater from sidewalk 1 and driveway 12 naturally flows into bioretention ditch 2 due to the 15-30cm height difference between vegetation layer 9 and the road surface. Initially, rainwater first contacts vegetation layer 9, where plant leaves intercept some suspended matter, and roots absorb nutrients such as nitrogen and phosphorus. Subsequently, rainwater infiltrates into soil layer 8, where the mixed structure of sandy loam, humus, and clay filters and adsorbs pollutants such as heavy metals and organic matter through pores. Simultaneously, humus provides an environment for microorganisms, enhancing biodegradation capabilities. Rainwater purified by soil layer 8 permeates downwards to transition layer 7, where sand or fine gravel layers further filter fine particles, preventing soil particles from entering drainage layer 6. Finally, rainwater enters drainage layer 6, where the large pores of gravel or crushed stone rapidly conduct water, flowing through support netting 4 and then into drainage pipe 3 via drainage outlet 5.

[0031] During heavy rain, when the infiltration rate of rainwater lags behind the flow rate, the water level in the bioretention ditch 2 rises. Excess rainwater passes through the filter screen 13 and enters the overflow pipe 10, quickly flowing into the drainage pipe 3, reducing road surface flooding. The water flow impacts the drive blades 17 below the filter screen 13, causing the rotating shaft 15 to rotate, which in turn causes the cleaning brush 16 above the filter screen 13 to rotate synchronously, removing debris from the surface of the filter screen 13, preventing blockage, and ensuring unobstructed overflow channels.

[0032] The specific implementation process is as follows:

[0033] During use, regularly check the growth status of the vegetation, replant withered plants, prune overly dense branches and leaves to avoid blocking the overflow pipe 10 and filter screen 13. Regularly rotate and remove the mounting frame 18, take out the filter screen 13 for thorough cleaning, and replace the worn cleaning brush 16 or drive blade 17.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A soil-modified rainwater bioretention facility, characterized in that: Includes a sidewalk (1) and a driveway (12), with a bioretention ditch (2) connecting the sidewalk (1) and the driveway (12). The bioretention ditch (2) is connected to a drainage pipe (3), and the bioretention ditch (2) has a drainage outlet (5). The drainage outlet (5) is connected to the drainage pipe (3). A support net (4) is connected to the inner wall of the drainage outlet (5). A drainage layer (6) is provided on top of the support net (4). A transition layer (7) is provided on top of the drainage layer (6). A soil layer (8) is provided on top of the transition layer (7). The top of the soil layer (8) is... A vegetation layer (9) is provided. The bioretention ditch (2) is connected to an overflow pipe (10). The overflow pipe (10) is connected to a drainage pipe (3). The end of the overflow pipe (10) away from the drainage pipe (3) passes through the soil layer (8) and the vegetation layer (9). The overflow pipe (10) is connected to a frame (11). The frame (11) is connected to a filter screen (13). The frame (11) is rotatably connected to a rotating shaft (15). The two ends of the rotating shaft (15) are respectively connected to a drive blade (17) and a cleaning brush (16). The cleaning brush (16) cooperates with the filter screen (13).

2. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: The bioretention trench (2) is connected to a partition (14).

3. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: The frame (11) is connected to a mounting frame (18), which is threadedly connected to the overflow pipe (10).

4. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: The overflow pipe (10) is provided in several groups, and the several groups of overflow pipes (10) are symmetrically arranged, and the several groups of overflow pipes (10) are respectively close to the sidewalk (1) and the roadway (12).

5. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: There is a first height difference between the top surface of the vegetation layer (9) and the top surface of the sidewalk (1), and there is a second height difference between the top surface of the vegetation layer (9) and the top surface of the roadway (12). The values ​​of the first height difference and the second height difference are both in the range of 15cm-30cm.

6. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: The top surface of the filter (13) is on the same horizontal plane as the top surface of the sidewalk (1) and the top surface of the driveway (12).

7. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: The soil layer (8) is made of a mixture of sandy loam, humus and clay.

8. The soil-improved rainwater bioretention facility as described in claim 1, characterized in that: The soil layer (8) has a thickness of 30cm-60cm, the transition layer (7) has a thickness of 10cm-20cm, and the drainage layer (6) has a thickness of 25cm-30cm.

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