Pavement initial rainwater collecting, discharging and purifying system suitable for riverside branches

Abstract

The utility model discloses a road surface initial rainwater collecting, discharging and purifying system suitable for branches along a river. The road surface initial rainwater collecting, discharging and purifying system comprises a collecting subsystem, a discharging subsystem and a purifying subsystem. Wherein the collection subsystem comprises a sidewalk pavement and a motor vehicle road surface; the drainage subsystem comprises a road curbstone open hole, a rainwater channel and a stream ditch block stone, and the road curbstone open hole is communicated with the rainwater channel; the purification subsystem comprises filter belts and a plant purification area, and the filter belts comprise a large-particle-size filter belt, a medium-particle-size filter belt and a small-particle-size filter belt. Compared with the prior art, the rainwater collection and purification device adapts to specific conditions of road surfaces along rivers to achieve initial rainwater collection, discharge and purification, the construction cost of rainwater collection is reduced, meanwhile, the driving experience is improved, and the construction cost of rainwater discharge and the construction cost of rainwater purification are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of rainwater interception, purification and reuse in sponge city construction, and relates to a road surface initial rainwater collection, discharge and purification system. Background Technology

[0002] Road surfaces are typically made of hardened materials such as concrete or asphalt, which significantly increases the impermeable area, altering the original hydrological cycle and increasing the risk of urban flooding caused by rainfall. At the same time, pollutants generated by human activities adhere to and accumulate on road surfaces. In the early stages of rainfall, these pollutants, washed away by rainwater, enter the urban drainage network and are eventually discharged into rivers, causing initial rainwater pollution problems and posing a serious threat to the water environment.

[0003] Existing urban road stormwater drainage systems, such as Figure 1 As shown, a road surface drain 1 is installed at the junction of the motor vehicle road surface 19 and the pedestrian road surface 17. A main rainwater pipe 3 is installed under the motor vehicle road surface 19, and the main rainwater pipe 3 is connected to the drain 1 via a drain inlet connecting pipe 2. Rainwater inspection wells 4 are installed at intervals along the main rainwater pipe 1. The road surface slopes towards the drain 1. When rainfall occurs, rainwater enters the drain 1 and then flows into the main rainwater pipe 3 through the drain inlet connecting pipe 2. The disadvantages of this technical solution are: due to the high degree of road surface hardening, initial rainwater pollution directly enters the main rainwater pipe 3 with surface runoff, resulting in initial rainwater pollution problems. Furthermore, the downstream diameter of the main rainwater pipe 3 increases, leading to higher construction costs.

[0004] The concept of a sponge city is that it can absorb, store, infiltrate, and purify rainwater when it rains. For example... Figure 2 As shown, taking a road as an example, a decentralized sunken green space 5 is set up. The surface runoff generated by rainfall first passes through the sunken green space 5. After being stored and purified, the rainwater finally enters the main rainwater pipe 3 through the rainwater inlet 1. This system can effectively control small and medium rainfall.

[0005] However, in engineering applications, sponge city systems have high requirements for road cross-sectional conditions, requiring sufficient space to arrange sunken green spaces. Especially for urban branch roads with compact spatial layouts, there are often no conditions suitable for arranging sunken green spaces. Utility Model Content

[0006] Based on the improvements to the existing technology, this utility model proposes a road surface initial rainwater collection, discharge and purification system suitable for riverside branch roads. Initial rainwater is collected on the road surface and sidewalk of the riverside branch road. Rainwater is discharged through openings in the roadside stones and rainwater channels designed in accordance with the road surface. After being purified by the filter belt and plant purification area, the treated rainwater is finally discharged into the river channel along the road surface.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A kind of road surface initial rainwater collection and discharge and purification system suitable for along river branch, including collection subsystem, discharge subsystem and purification subsystem;Including collection subsystem, discharge subsystem and purification subsystem;The collection subsystem is responsible for collecting road surface initial rainwater, the discharge subsystem is responsible for the discharge of collected road surface initial rainwater to green belt, purification subsystem is responsible for the filtration and purification of road surface initial rainwater discharged to green belt;Wherein, the collection subsystem includes pedestrian road surface and motor vehicle road surface;The discharge subsystem includes road curbstone opening, rainwater channel and gully block stone, the road curbstone opening is located at the junction between the pedestrian road surface and motor vehicle road surface close to along river branch, the rainwater channel outlet is located below the pedestrian road surface, and gully block stone is arranged downstream of the rainwater channel outlet, and the road curbstone opening is communicated with the rainwater channel;The purification subsystem includes filter zone and plant purification area, and the filter zone includes large-diameter filter zone, medium-diameter filter zone and small-diameter filter zone.

[0009] In some embodiments, the pedestrian road surface and the motor vehicle road surface are both inclined to the river direction at a slope of 1.5%.

[0010] In some embodiments, the discharge subsystem is arranged at intervals.

[0011] In some embodiments, the gully block stone gradually decreases in size from upstream to downstream.

[0012] In some embodiments, the gully block stone, the large-diameter filter zone, the medium-diameter filter zone and the small-diameter filter zone are arranged at the green belt of the roadside.

[0013] In some embodiments, the large-diameter filter zone is a cuboid structure, the cuboid structure is filled with volcanic rock filler, the medium-diameter filter zone is a cuboid structure, the cuboid structure is filled with volcanic rock filler, and the small-diameter filter zone is a cuboid structure, the cuboid structure is filled with volcanic rock filler.

[0014] In some embodiments, the plant purification area is planted with thick-leaved stone fern and yellow alocasia from top to bottom.

[0015] In some embodiments, the road curbstone opening is connected to the motor vehicle road surface at a concave water-collecting area.

[0016] In some embodiments, the large-diameter filter zone and the medium-diameter filter zone are fixed by inwardly adhering two surfaces, and the medium-diameter filter zone and the small-diameter filter zone are fixed by inwardly adhering two surfaces.

[0017] Compared with the prior art, the technical solution has the following advantages:

[0018] 1) By setting the road transverse slope direction, the rainwater of the sidewalk and the motor vehicle lane will flow into the green belt on the side of the road, without the need to set the rainwater inlet on the motor vehicle lane, which reduces the engineering cost of rainwater collection and improves the driving experience;

[0019] 2) By the form of interval arrangement, the rainwater is discharged through independent drainage systems, and the specifications of each set of drainage system are consistent, which avoids the phenomenon that the downstream pipe diameter of the rainwater pipeline becomes larger and larger, and reduces the engineering cost of rainwater drainage;

[0020] 3) The filter belt in the form of combination of fillers with different sizes is used to adsorb and intercept different sizes of pollutants in the initial rainwater, and the volcanic rock filler with dense holes on the surface is selected to increase the interception and adsorption effect of the pollutants in the initial rainwater, thereby reducing the engineering cost of rainwater purification;

[0021] 4) Without external driving force and zero energy consumption, the rainwater resources are utilized, and the landscape effect is considered;

[0022] 5) The whole system has simple structure, and is convenient for construction and installation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of a traditional urban road rainwater drainage system;

[0024] Figure 2 is a schematic view of a sponge city road rainwater drainage system;

[0025] Figure 3 is a frame diagram of a road initial rainwater collection, drainage and purification system suitable for a river branch road according to the present application;

[0026] Figure 4 is a sectional view of a road initial rainwater collection, drainage and purification system suitable for a river branch road according to the present application;

[0027] Figure 5 is a plan view of a road initial rainwater collection, drainage and purification system suitable for a river branch road according to the present application;

[0028] Figure 6 is an axial side view of the filter belt;

[0029] Figure 7 is a main view of the road curbstone opening;

[0030] Figure 8 is a plan view of the road curbstone opening.

[0031] In the diagram: 1. Rainwater inlet; 2. Rainwater inlet connecting pipe; 3. Main rainwater pipe; 4. Rainwater inspection well; 5. Sunken green space; 6. Roadside curb opening; 7. Rainwater channel; 8. Stream riprap; 9. Large-diameter filter belt; 10. Medium-diameter filter belt; 11. Small-diameter filter belt; 12. Plant purification area; 13. Volcanic rock filler; 14. Permeable partition; 15. Pebble filler; 16. Gravel filler; 171, 172. First and second pedestrian walkways; 18. Sunken water collection area; 19. Motor vehicle road surface; 100. Collection subsystem; 200. Discharge subsystem; 300. Purification subsystem. Detailed Implementation

[0032] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] like Figure 3 As shown, this utility model discloses a system for collecting, discharging, and purifying initial rainwater runoff from road surfaces along riverside branch roads. The system includes a collection subsystem 100, a discharge subsystem 200, and a purification subsystem 300. The collection subsystem is responsible for collecting initial rainwater runoff from the road surface. The discharge subsystem is responsible for discharging the collected initial rainwater runoff into the green belt. The purification subsystem 300 is responsible for filtering and purifying the initial rainwater runoff discharged into the green belt.

[0034] like Figure 4 , Figure 5 As shown, the specific implementation method of the initial rainwater collection, discharge and purification system for riverside branch roads proposed in this utility model is described as follows:

[0035] The collection subsystem 100 includes a pedestrian walkway 17 and a motor vehicle road surface 19.

[0036] Furthermore, both the pedestrian walkway 17 and the motor vehicle road surface 19 have a cross slope of 1.5% towards the river channel. The advantage of this design is that by setting the cross slope, rainwater from both the pedestrian walkway and the motor vehicle road will flow to the side of the road.

[0037] In green belts, there is no need to install rainwater inlets on motor vehicle lanes, which reduces project costs and improves the driving experience.

[0038] The discharge subsystem 200 includes a roadside curb opening 6, a storm drain 7, and riprap 8. The roadside curb opening 6 is located at the junction of the pedestrian walkway 17 and the vehicular roadway 19 near the riverside branch road. The outlet of the storm drain 7 is located below the pedestrian walkway 17, and the riprap 8 is located downstream of the outlet of the storm drain 7. The roadside curb opening 6 is connected to the storm drain 7.

[0039] Furthermore, the emission subsystem 200 is arranged at 10-meter intervals.

[0040] The advantage of this design is that rainwater is discharged through independent drainage subsystems in this form of interval arrangement. The specifications of each set of drainage subsystems are consistent, avoiding the phenomenon of increasing pipe diameter downstream of the rainwater pipeline, and reducing the engineering cost.

[0041] The purification subsystem 300 comprises filter belts and a plant purification area 12. The filter belts comprise a large-particle-size filter belt 9, a medium-particle-size filter belt 10, and a small-particle-size filter belt 11. The filter belts are downstream of the plant purification area 12. The large-particle-size filter belt 9 and the medium-particle-size filter belt 10 are fixed by inwardly adhering two sides, and the medium-particle-size filter belt 10 and the small-particle-size filter belt 11 are fixed by inwardly adhering two sides.

[0042] Further, the particle size of the gully block stone gradually decreases from upstream to downstream.

[0043] The advantage of this design is that the gully block stone dissipates the water outflow of the rainwater channel.

[0044] Further, the gully block stone 8, the large-particle-size filter belt 9, the medium-particle-size filter belt 10, and the small-particle-size filter belt 11 are arranged at the green belt of the roadside.

[0045] As shown in Figure 6 Further, the large-particle-size filter belt 9 has a cuboid structure, and the cuboid structure is filled with volcanic rock fillers with a particle size of about 2 cm.

[0046] Further, the medium-particle-size filter belt 10 has a cuboid structure, and the cuboid structure is filled with volcanic rock fillers with a particle size of about 1 cm.

[0047] Further, the small-particle-size filter belt 11 has a cuboid structure, and the cuboid structure is filled with volcanic rock fillers with a particle size of about 0.5 cm.

[0048] The advantage of this design is that the filter belts with different sizes of fillers are combined to adsorb and retain different sizes of pollutants in the initial rainwater, and the volcanic rock fillers with a large number of holes on the surface are selected to increase the interception and adsorption effect of pollutants in the initial rainwater.

[0049] Further, the large-particle-size filter belt 9 and the medium-particle-size filter belt 10, and the medium-particle-size filter belt 10 and the small-particle-size filter belt 11 are both provided with water-permeable partitions 14.

[0050] The advantage of this design is that water-permeable partitions are arranged between filter belts with different particle sizes, which facilitates the full contact of rainwater with fillers and increases the adsorption and retention effect of pollutants.

[0051] Further, the plant purification area 12 is planted with thick leaf stone and yellow flag from top to bottom.

[0052] The advantage of this design is that the shrubs can slow down the impact of water flow, the emergent plants can absorb and degrade the early rainwater pollutants, and the stems of the shrubs can reduce the rainwater flow rate, so that more early rainwater pollutants are absorbed by the emergent plants.

[0053] As shown in Figure 7 , As shown in Figure 8 , the lower concave water collecting area 18 is arranged at the joint of the road curb opening 6 and the motor vehicle road surface 19.

[0054] Further, the lower concave water collecting area 8 is 5% of the transverse slope towards the road curb opening direction.

[0055] The advantage of this design is that the water collecting capacity of the curb opening is increased by arranging the lower concave water collecting area.

[0056] The operation principle of the road initial rainwater collecting and discharging and purification system suitable for the river branch road is as follows: when it rains, the rain forms runoff on the pedestrian road surface and the motor vehicle road surface, the runoff rainwater enters the road curb opening 6 under the joint action of the road surface transverse slope and the lower concave water collecting area 18, and is discharged into the green belt outside the sidewalk through the rainwater channel 7, the runoff rainwater is buffered and energy dissipated by the stream gully block stone 8, the kinetic energy is reduced, the flow rate is reduced, and then the runoff rainwater enters the large particle size filter zone 9, the medium particle size filter zone 10 and the small particle size filter zone 11 in turn, the pollutants in the initial rainwater are physically intercepted and adsorbed in the above filter zones, then the runoff rainwater passes through the plant purification area 12, the stems of the thick leaf stone reduce the flow rate of the runoff rainwater, the initial rainwater pollutants are absorbed and degraded by the yellow flag, and the treated rainwater is finally discharged into the river.

[0057] For those skilled in the art, the above-mentioned utility model can be improved and changed according to the above-mentioned utility model. Any modification, improvement and change made on the basis of the utility model shall be included in the protection scope of the utility model.

Claims

1. A road surface initial rainwater collection, discharge and purification system suitable for a river tributary, characterized in that, The system comprises a collecting subsystem, a discharging subsystem and a purifying subsystem; the collecting subsystem is responsible for collecting initial rainwater on the road surface, the discharging subsystem is responsible for discharging the collected initial rainwater on the road surface to the green belt, and the purifying subsystem is responsible for filtering and purifying the initial rainwater on the road surface discharged to the green belt; wherein the collecting subsystem comprises a pedestrian road surface and a motor vehicle road surface; the discharging subsystem comprises a road curbstone opening, a rainwater channel and a gully block stone, the road curbstone opening is arranged at the connecting part between the pedestrian road surface and the motor vehicle road surface near the river branch road, the rainwater channel outlet is arranged below the pedestrian road surface, and the gully block stone is arranged downstream of the rainwater channel outlet, and the road curbstone opening is communicated with the rainwater channel; the purifying subsystem comprises a filter belt and a plant purification area, and the filter belt comprises a large-particle-size filter belt, a medium-particle-size filter belt and a small-particle-size filter belt.

2. The road surface initial rainwater collecting, draining and purifying system suitable for river tributaries according to claim 1, characterized in that, The pedestrian road surface and the motor vehicle road surface are both inclined to the river direction at a slope of 1.5%.

3. The system for collecting, discharging and purifying initial rainwater on a road surface according to claim 1, wherein The discharging subsystem is arranged at intervals.

4. The road surface initial rainwater collecting, draining and purifying system suitable for river tributaries according to claim 1, characterized in that, The particle size of the gully block stone gradually decreases from upstream to downstream.

5. The road surface initial rainwater collecting, draining and purifying system suitable for river tributaries according to claim 1, characterized in that, The gully block stone, the large-particle-size filter belt, the medium-particle-size filter belt and the small-particle-size filter belt are arranged at the green belt of the road side.

6. The road surface initial rainwater collecting, draining and purifying system suitable for river tributaries according to claim 1, characterized in that, The large-particle-size filter belt is a cuboid structure, the medium-particle-size filter belt is a cuboid structure, and the small-particle-size filter belt is a cuboid structure, and each of the three cuboid structures is filled with volcanic rock filler.

7. The system for collecting, discharging and purifying initial rainwater on a road surface according to claim 1, wherein The plant purification area is planted with thick-leaved stone ferns and yellow flag irises from top to bottom.

8. The system for collecting, discharging and purifying initial rainwater on a road surface according to claim 1, wherein The road curbstone opening is provided with a concave water collecting area at the connecting part of the motor vehicle road surface.

9. The system for collecting, discharging and purifying initial rainwater on a road surface according to claim 1, wherein The large-particle-size filter belt and the medium-particle-size filter belt are fixed by the inward two-face adhering mode, and the medium-particle-size filter belt and the small-particle-size filter belt are fixed by the inward two-face adhering mode.

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