CN112681054A - Sponge urban road ecological detention ditch system in rainy area - Google Patents
Sponge urban road ecological detention ditch system in rainy area Download PDFInfo
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- CN112681054A CN112681054A CN202011519387.3A CN202011519387A CN112681054A CN 112681054 A CN112681054 A CN 112681054A CN 202011519387 A CN202011519387 A CN 202011519387A CN 112681054 A CN112681054 A CN 112681054A
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Abstract
The invention discloses a sponge urban road ecological detention ditch system in a rainy region, wherein a biological detention ditch is arranged between a green belt and a motor vehicle lane, a plurality of overflow wells extending from the ground surface to the lower part of the biological detention ditch are arranged in the biological detention ditch along the length extending direction, the overflow wells are communicated through perforated pipes penetrating through the biological detention ditch, and the overflow wells are communicated with municipal rainwater pipes buried in the biological detention ditch; and other spaces in the biological retention ditch are filled by adopting a multilayer permeation structure. The invention has strong practicability, can use local materials and has simple construction; rainwater in the green belt and the motor vehicle lane can be quickly drained into a municipal rainwater system, accumulated water on the road surface is reduced, safety of pedestrians and driving is guaranteed, soaking of the rainwater on the roadbed is reduced, and normal use of the road is guaranteed; the invention has good water retention, water seepage and water purification effects on rainwater, and improves the utilization efficiency of the biological detention ditch of the sponge city.
Description
Technical Field
The invention relates to the technical field of municipal road construction, in particular to an ecological detention ditch system for sponge urban roads in rainy regions.
Background
The sponge city is a new generation of city rainfall flood management concept, and means that the city can be like a sponge, and has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like. The bioretention facility is an important component of a sponge city, and is a linear, shallow, concave landscape space with rich landscape plants and regular shapes. At present, in municipal road sponge city design, non-point source pollution treatment is a design key point.
Urban road surface runoff is a main component of non-point source pollution, and initial rainwater contains more pollutants such as suspended particles, organic pollutants, heavy metals and oil substances and seriously affects the received water body. In the existing sponge urban drainage mode, drainage pipelines and ditch systems are most commonly applied, but the drainage pipelines and the ditch systems can only be used as a rainwater collection system, rainwater cannot be drained into a municipal rainwater pipeline network as soon as possible, so that water is often accumulated on the road surface, and the rainwater soaks the road to cause waterlogging; and the initial rainwater is directly discharged into the receiving water body after being conveyed by the pipeline, so that not only is the water quality of the receiving water body easily polluted, but also pipeline sediments are flushed into the water body, and double pollution is caused.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the sponge urban road ecological detention ditch system for the rainy region can play roles in water retention, water seepage and water purification on rainwater, and enables the rainwater to enter a municipal drainage system as soon as possible.
In order to solve the technical problems, the invention adopts the technical scheme that: the sponge urban road ecological detention ditch system for the rainy region comprises a green belt and a motor way, wherein a biological detention ditch is arranged between the green belt and the motor way, a plurality of overflow wells extending from the ground surface to the lower part of the biological detention ditch are arranged in the biological detention ditch along the length extending direction, the overflow wells are communicated with each other through perforated pipes penetrating through the biological detention ditch, and the overflow wells are communicated with municipal rainwater pipes buried in the biological detention ditch; and other spaces in the biological retention ditch are filled by adopting a multilayer permeation structure.
Further, the method comprises the following steps: the multilayer seepage structure comprises a water-retaining layer, a planting soil layer, a packing layer, a permeable geotextile layer, a drainage layer and an impermeable geotextile layer which are sequentially arranged in the biological detention ditch from bottom to top; the outside of the biological detention ditch is a plain soil tamping layer; the perforated pipe and the municipal rainwater pipe penetrate through the drainage layer in the biological retention ditch.
Further, the method comprises the following steps: the top opening of the overflow well is provided with a rainwater cover, and a circle of cobblestones are paved around the rainwater cover for enclosure.
Further, the method comprises the following steps: the bottom level of the overflow well is lower than the setting height of the municipal rainwater pipe.
Further, the method comprises the following steps: the difference in height between overflow well bottom and the municipal rainwater pipe is 300 mm.
Further, the method comprises the following steps: and a cobble foot protection belt is arranged between the green belt and the biological retention ditch.
Further, the method comprises the following steps: a road shoulder belt is arranged between the motor vehicle lane and the biological detention ditch, and a plurality of road edge stone openings are arranged on the road shoulder belt along the length direction.
Further, the method comprises the following steps: the arrangement positions of the openings of the curbstones are in one-to-one correspondence with the overflow wells, and the distance between the openings of the adjacent curbstones is consistent with the distance between the adjacent overflow wells.
Further, the method comprises the following steps: the opening of the road edge stone is an inverted trapezoid opening, the width of an upper opening of the road edge stone is more than or equal to 500mm, the width of a lower opening of the road edge stone is more than or equal to 200mm, and the elevation of the lower opening of the road edge stone is 20mm lower than the pavement of the motor way.
Further, the method comprises the following steps: and cobbles are paved on two sides of the opening of the road edge stone.
The invention has the beneficial effects that: according to the invention, a biological detention ditch and an overflow well are arranged between a green belt and a motor vehicle lane to drain and purify rainwater, and the purified rainwater enters the bottom of the overflow well through a perforated pipe and overflows into a municipal rainwater pipeline communicated with the overflow well; the invention has strong practicability, can use local materials and has simple construction; rainwater in the green belt and the motor vehicle lane can be quickly drained into a municipal rainwater system, accumulated water on the road surface is reduced, safety of pedestrians and driving is guaranteed, soaking of the rainwater on the roadbed is reduced, and normal use of the road is guaranteed; the invention has good water retention, water seepage and water purification effects on rainwater, and improves the utilization efficiency of the biological detention ditch of the sponge city.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic view of a curb opening;
labeled as: 100-green belt, 200-motor vehicle lane, 300-biological detention ditch, 310-water retaining belt, 320-planting soil layer, 330-packing layer, 340-permeable geotextile layer, 350-drainage layer, 360-impermeable geotextile layer, 370-plain soil tamping layer, 400-overflow well, 410-rainwater cover, 420-cobblestone enclosure, 500-perforated pipe, 600-municipal rainwater pipe, 700-cobblestone foot protecting belt, 800-road shoulder belt and 810-road edge stone opening.
Detailed Description
In order to facilitate understanding of the invention, the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the sponge urban road ecological retention ditch system for rainy regions disclosed by the invention is characterized in that a biological retention ditch 300 is arranged between a green belt 100 and a motor vehicle lane 200, the biological retention ditch 300 is of a concave ditch-shaped structure, a plurality of overflow wells 400 are arranged in the biological retention ditch 300, the overflow wells 400 are sequentially arranged at intervals along the length direction of the biological retention ditch 300, the overflow wells 400 are communicated with each other through perforated pipes 500 embedded in the biological retention ditch 300, and the overflow wells 400 are communicated with municipal rainwater pipes 600 of a municipal rainwater system; the other spaces except the overflow well 400 in the bioretention trench 300 are filled with a multi-layered permeable structure. When rainwater is collected on the green belt 100 and the motorway 200 after rain, the rainwater on the green belt 100 can flow into the biological retention ditch 300, and after the actions of water retention, water seepage and water purification of a multilayer permeation structure in the biological retention ditch 300, the purified rainwater flows into the perforated pipe 500 through the holes on the perforated pipe 500 and then flows into the overflow well 400 along the perforated pipe 500, the rainwater on the motorway 200 directly flows into the overflow well 400, and the rainwater collected in the overflow well 400 overflows into the municipal rainwater pipe 600 and finally enters a municipal rainwater system for treatment.
As shown in fig. 2 and 3, the bioretention trench 300 used in the present invention is a concave trench structure having a level lower than the ground surface, and the transition zone between the bioretention trench 300 and the green belt 100 is a slope surface, and similarly, the transition zone between the bioretention trench 300 and the driveway 200 is a slope surface. The multilayer permeable structure in the biological retention ditch 300 is sequentially provided with a water retaining layer 310, a planting soil layer 320, a packing layer 330, a permeable geotextile layer 340, a drainage layer 350 and an impermeable geotextile layer 360 from top to bottom, rainwater flowing into the biological retention ditch 300 is subjected to water retaining, water seepage and water purification through the water retaining layer 310, the planting soil layer 320 and the packing layer 330, the purified rainwater permeates into the drainage layer 350, the perforated pipe 500 penetrates through the drainage layer 350, and the purified rainwater further penetrates through the holes in the perforated pipe 500 and enters the perforated pipe 500. The outer layer of the biological retention ditch 300 is covered with a plain soil tamping layer 370, and the outer layer of the biological retention ditch 300 is reinforced by adopting a plain soil tamping mode. According to the construction standard, the elevation of the biological retention ditch 300 is set to be-0.20, the thickness of a water retention layer 310 is 100mm, the thickness of a planting soil layer 320 is 700mm, a packing layer 330 is a coarse sand layer with the thickness of 100mm, and the thickness of a drainage layer 350 is 300 mm.
As shown in fig. 1 and 2, a plurality of overflow wells 400 are provided along the longitudinal direction of the biological retention trench 300, the intervals between the overflow wells 400 are uniform, and the elevation of the overflow wells 400 is-0.10. A rainwater cover 410 is covered at the top opening of the overflow well 400, a plurality of rainwater openings are formed in the rainwater cover 410, and rainwater flowing from the motor vehicle lane 200 flows into the overflow well 400 through the rainwater openings in the rainwater cover 410. A circle of cobblestone fencing 420 is laid around the rainwater cover 410, when the rainfall is small, one part of rainwater passes through the cobblestone fencing 420 and enters the overflow well 500, and the other part of rainwater flows into the biological retention ditch 300 along the cobblestone fencing 420, so that the effect of water retention is achieved; the large sundries such as leaves and garbage in the rainwater are blocked by the rainwater inlet cover 410 and the cobble enclosure 420. In order to purify and remove impurities from inflow rainwater, the bottom of the overflow well 400 and the municipal rainwater pipe 600 are arranged in a staggered manner in the vertical direction, so that the horizontal height of the bottom of the overflow well 400 is lower than the arrangement height of the municipal rainwater pipe 600, and the height difference is 300 mm; since the municipal rainwater pipe 600 and the perforated pipe 500 are also buried in the drainage layer 350 of the bioretention trench 300, the level of the perforated pipe 500 is also higher than the bottom of the overflow well 400. Rainwater flowing into the overflow well 400 from the perforated pipe 500 and the rainwater cover 410 is firstly collected at the bottom of the overflow well 400, sand impurities in the rainwater are deposited at the bottom of the overflow well 400 after a period of time, when the height of the rainwater collected at the bottom of the overflow well 400 is higher than that of the municipal rainwater pipe 600, the rainwater in the overflow well 400 overflows into the municipal rainwater pipe 600, and finally the rainwater is discharged into a municipal rainwater system for subsequent sewage treatment.
As shown in fig. 1 and 2, in the present invention, a road shoulder belt 800 is disposed between the vehicle lane 200 and the bioretention trench 300, a plurality of notches are disposed on the road shoulder belt 800 as curb openings 810, the curb openings 810 are used as rain water outlets on the vehicle lane 200, the positions of the curb openings 810 correspond to the overflow wells 400 one by one, and the distance between the adjacent curb openings 810 is the same as the distance between the adjacent overflow wells 400. As shown in FIG. 4, the opening 810 of the curbstone is an inverted trapezoid opening, the width of the upper opening of the opening 810 of the curbstone is larger than or equal to 500mm, the width of the lower opening is larger than or equal to 200mm, and the elevation of the lower opening is 20mm lower than the road surface of the motor vehicle lane 200. Considering the influence of the transition zone slope on the drainage, as shown in fig. 1 and 2, the present invention lays a pebble foot protection belt 700 between the green belt 100 and the bioretention ditch 300, and lays pebbles, i.e. rough stones, on both sides of the curbstone opening 810, and primarily purifies the rainwater through the laid pebbles to filter the larger impurities in the rainwater.
Claims (10)
1. Rain zone sponge urban road ecological detention ditch system, including greenbelt (100) and motor way (200), its characterized in that: a biological retention ditch (300) is arranged between the green belt (100) and the motor vehicle lane (200), a plurality of overflow wells (400) extending from the ground surface to the lower part of the biological retention ditch (300) are arranged in the biological retention ditch (300) along the length extending direction, the plurality of overflow wells (400) are communicated through perforated pipes (500) passing through the biological retention ditch (300), and the overflow wells (400) are communicated with municipal rainwater pipes (600) buried in the biological retention ditch (300); the other spaces in the biological retention ditch (300) are filled by adopting a multi-layer infiltration structure.
2. The sponge urban road ecological detention ditch system of rainy area of claim 1, characterized in that: the multilayer permeable structure comprises a water retaining layer (310), a planting soil layer (320), a filler layer (330), a permeable geotextile layer (340), a drainage layer (350) and an impermeable geotextile layer (360) which are arranged in the biological retention ditch (300) from top to bottom in sequence; the outside of the biological detention ditch (300) is provided with a rammed earth layer (370); the perforated pipe (500) and the municipal rainwater pipe (600) pass through the drainage layer (350) in the bioretention trench (300).
3. The sponge urban road ecological detention ditch system of rainy area of claim 1, characterized in that: the top opening of the overflow well (400) is provided with a rainwater cover (410), and a ring of cobblestone enclosure (420) is laid on the periphery of the rainwater cover (410).
4. The sponge urban road ecological detention ditch system of rainy area of claim 1, characterized in that: the bottom level of the overflow well (400) is lower than the setting height of the municipal rainwater pipe (600).
5. The sponge urban road ecological detention ditch system of rainy area of claim 4, characterized in that: the height difference between the bottom of the overflow well (400) and the municipal rainwater pipe (600) is 300 mm.
6. The sponge urban road ecological detention ditch system of rainy area of claim 1, characterized in that: a cobble foot protection belt (700) is arranged between the green belt (100) and the biological retention ditch (300).
7. The sponge urban road ecological detention ditch system of rainy area of claim 1, characterized in that: a road shoulder belt (800) is arranged between the motor vehicle lane (200) and the biological detention ditch (300), and a plurality of road edge stone openings (810) are arranged on the road shoulder belt (800) along the length direction.
8. The sponge urban road ecological detention ditch system of rainy area of claim 7, characterized in that: the arrangement positions of the curbstone openings (810) correspond to the overflow wells (400) one by one, and the distance between the adjacent curbstone openings (810) is consistent with the distance between the adjacent overflow wells (400).
9. The sponge urban road ecological detention ditch system of rainy area of claim 7, characterized in that: the opening (810) of the curbstone is an inverted trapezoid opening, the width of the upper opening of the opening (810) of the curbstone is more than or equal to 500mm, the width of the lower opening of the opening (810) of the curbstone is more than or equal to 200mm, and the elevation of the lower opening of the opening is 20mm lower than the pavement of the motor way (200).
10. The sponge urban road ecological detention ditch system of rainy area of claim 7, characterized in that: and large pebbles are paved on two sides of the opening (810) of the road edge stone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519387.3A CN112681054A (en) | 2020-12-21 | 2020-12-21 | Sponge urban road ecological detention ditch system in rainy area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519387.3A CN112681054A (en) | 2020-12-21 | 2020-12-21 | Sponge urban road ecological detention ditch system in rainy area |
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| CN112681054A true CN112681054A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011519387.3A Pending CN112681054A (en) | 2020-12-21 | 2020-12-21 | Sponge urban road ecological detention ditch system in rainy area |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207404945U (en) * | 2017-09-01 | 2018-05-25 | 重庆环投生态环境监测网络与工程治理有限公司 | A kind of biological arresting device of river both sides control rainwater non-point pollution |
| CN208104958U (en) * | 2018-04-25 | 2018-11-16 | 郑州市市政工程勘测设计研究院 | A kind of ecostagnation band applied to town road |
| CN208266622U (en) * | 2018-04-12 | 2018-12-21 | 重庆市市政设计研究院 | A kind of sponge non-watertight road edge stone and sponge urban road structural system |
| CN109356225A (en) * | 2018-11-27 | 2019-02-19 | 上海园林绿化建设有限公司 | A kind of Multifunctional rain ecological utilization system |
| CN209482092U (en) * | 2019-01-25 | 2019-10-11 | 重庆市市政设计研究院 | Suitable for the sponge city system of biological stranded belt is arranged outside town road red line |
-
2020
- 2020-12-21 CN CN202011519387.3A patent/CN112681054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207404945U (en) * | 2017-09-01 | 2018-05-25 | 重庆环投生态环境监测网络与工程治理有限公司 | A kind of biological arresting device of river both sides control rainwater non-point pollution |
| CN208266622U (en) * | 2018-04-12 | 2018-12-21 | 重庆市市政设计研究院 | A kind of sponge non-watertight road edge stone and sponge urban road structural system |
| CN208104958U (en) * | 2018-04-25 | 2018-11-16 | 郑州市市政工程勘测设计研究院 | A kind of ecostagnation band applied to town road |
| CN109356225A (en) * | 2018-11-27 | 2019-02-19 | 上海园林绿化建设有限公司 | A kind of Multifunctional rain ecological utilization system |
| CN209482092U (en) * | 2019-01-25 | 2019-10-11 | 重庆市市政设计研究院 | Suitable for the sponge city system of biological stranded belt is arranged outside town road red line |
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Application publication date: 20210420 |