CN113201992A - Stepped biological detention device for highway pavement runoff - Google Patents
Stepped biological detention device for highway pavement runoff Download PDFInfo
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- CN113201992A CN113201992A CN202110505701.0A CN202110505701A CN113201992A CN 113201992 A CN113201992 A CN 113201992A CN 202110505701 A CN202110505701 A CN 202110505701A CN 113201992 A CN113201992 A CN 113201992A
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- 238000004062 sedimentation Methods 0.000 claims abstract description 40
- 230000014759 maintenance of location Effects 0.000 claims abstract description 25
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000009301 bioretention Methods 0.000 claims description 20
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
- E03F3/046—Open sewage channels
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
Abstract
The invention discloses a stepped biological detention device for highway pavement runoff, which comprises a pre-sedimentation tank arranged at a highway side ditch and a biological detention tank attached to the pre-sedimentation tank; the biological retention tanks are arranged in a stepped manner from top to bottom, and a flow guide main pipe for guiding flow is arranged on the side wall of each biological retention tank; this technical scheme's biological detention device, through the preliminary sedimentation tank, solid particulate matter in the initial stage rainwater runoff can be got rid of through the sedimentation in the sedimentation tank, the rainwater discharges into biological detention pond through the preliminary sedimentation tank delivery port, and carry out infiltration and purification through biological detention pond filler, rainwater after biological detention pond filler purifies passes through the total drain pipe and flows into road bed bottom escape canal, when rainfall intensity is great, the rainwater then flows into lower rank biological detention pond through overflow drain pipe, and carry out the stagnant through lower rank biological detention pond and hold and purify, the realization is to stagnating the purpose of holding and purifying step by step of going on of highway rainwater runoff.
Description
Technical Field
The invention relates to the technical field of biological detention, in particular to a stepped biological detention device for highway pavement runoff.
Background
In recent years, with the development of national economy, the highway mileage in China is remarkably increased. However, conventional highway pavement drainage usually employs roadside ditches to collect rainwater, and then drains into a drainage ditch through rapid troughs arranged at regular intervals, and then flows into a downstream water body through the drainage ditch. The traditional drainage mode mainly based on a hardening ditch not only easily leads to that the confluence time of runoff is shortened and the confluence water amount is increased under the condition of high-intensity rainfall, so that water damage disasters along a highway are frequent, but also a large amount of pollutants accumulated on the surface of the highway enter rainwater runoff under the leaching and scouring action of rainfall and are finally discharged into a natural water body, so that the serious deterioration of the water environment along the highway is easily caused.
In order to solve the problems, the stepped bioretention device for highway pavement runoff needs to be designed.
Disclosure of Invention
In view of this, this technical scheme's biological detention device, through the preliminary sedimentation tank, the solid particle thing in the initial stage rainfall runoff can be got rid of through the sedimentation in the sedimentation tank, the rainwater discharges into biological detention pond through the preliminary sedimentation tank delivery port, and permeate and purify through biological detention pond filler, the rainwater after biological detention pond filler purification flows into road bed bottom escape canal through the main drain pipe, when rainfall intensity is great, the rainwater then flows into lower rank biological detention pond through overflow drain pipe, and carry out the stagnate through lower rank biological detention pond and purify, realize carrying out the purpose that stagnate and purify step by step to highway rainfall runoff.
A stepped biological detention device for highway pavement runoff comprises a pre-sedimentation tank arranged at a highway side ditch and a biological detention tank attached to the pre-sedimentation tank; the biological detention pond is a plurality of and a plurality of biological detention pond from the top down is cascaded arrangement, be provided with the water conservancy diversion that is used for the water conservancy diversion on the biological detention pond lateral wall and be responsible for.
Further, the pre-sedimentation tank comprises a reinforced concrete tank body, a flow partition plate arranged in the reinforced concrete tank body and a support pile arranged at the bottom of the reinforced concrete tank body; and an overflow hole for draining the bioretention pond is formed in the side wall of the reinforced concrete pond body.
Further, the laminating of the biological detention pond tip of cascaded arrangement sets up in reinforced concrete cell body lateral wall, and the top surface in biological detention pond is less than the level of overflow hole.
Further, the biological retention tank comprises a biological retention tank body, a covering layer, a planting soil layer, a sand filter layer and a gravel bearing layer, wherein the covering layer, the planting soil layer, the sand filter layer and the gravel bearing layer are arranged in the biological retention tank body; the covering layer, the planting soil layer, the sand filtering layer and the gravel bearing layer are sequentially arranged from top to bottom.
Further, the biological retention tanks have the same structure, and a bottom drain pipe communicated with the flow guide main pipe is arranged in the gravel bearing layer.
Further, be provided with the detention overflow pipe in the biological detention pond, the detention overflow pipe is "L" type structure, and the protrusion of detention overflow pipe one end is higher than the overburden, and the detention overflow pipe other end passes biological detention pond lateral wall.
Further, the planting soil layer is a composite filler formed by mixing river sand and natural soil according to the volume ratio of 2:1 and doping lignin fibers with the mass ratio of 5%, the river sand is medium coarse sand, the sand filter layer is river sand, and the gravel bearing layer is 4-8mm bean gravel.
Furthermore, a rainwater grate is arranged on the side wall of the pre-sedimentation tank; the diversion main pipe is communicated with a drainage ditch at the bottom of the highway subgrade.
Further, the installation height of the bottom drain pipe is lower than the height of the top surface of the gravel bearing layer.
The invention has the beneficial effects that:
the highway roadside ditch introduces the pavement runoff into the pre-sedimentation tank, solid particles in initial rainwater runoff can be removed in the sedimentation tank through sedimentation, so that particulate pollutants in the rainwater runoff and dissolved pollutants adsorbed on the particles can be effectively removed, the risk that the permeability of the biological retention tank is reduced because the solid particles in the initial rainwater runoff are directly deposited on the surface layer of the biological retention tank can be effectively relieved, the deposited particles in the pre-sedimentation tank can be periodically removed, and the highway roadside ditch has the advantage of being convenient for maintenance.
When the preliminary sedimentation tank water level reaches its delivery port height, the rainwater is discharged into first order biological detention pond through the preliminary sedimentation tank delivery port, and it permeates and purifies to pack through biological detention pond, rainwater after biological detention pond filler purifies flows into road bed bottom escape canal through the total drain pipe, when rainfall intensity is great, biological detention pond upper portion ponding reaches overflow arrangement's overflow mouth height, the rainwater then flows into next order biological detention pond through overflow drain pipe, and through next order biological detention pond stagnate hold and purify, analogize in proper order, thereby realize stagnating step by step and hold and the purpose of purifying to going on of highway rainwater runoff.
The method has the advantages that the lignose fibers are doped into the planting soil of the bioretention pond in a certain proportion, so that the method has 3 benefits, and firstly, the lignose fibers have good water retention property, can enhance the water content of the planting soil and is beneficial to the growth of plants; secondly, the pore structure of the lignocellulose is beneficial to providing a carrier for the attachment of microorganisms, so that the degradation effect on pollutants is promoted; thirdly, the lignin fiber can be used as a slow-release carbon source to provide a carbon source for denitrification.
The support pile is driven into the bottom of the pre-sedimentation tank and the bottom of the biological retention tank, and the top end of the support pile is fixed on the bottom plate of the reinforced concrete tank body, so that the risk of sedimentation and sliding of the pre-sedimentation tank and the biological retention tank can be prevented.
The bottom drain pipe of the biological detention pond is arranged at the top of the gravel bearing layer, so that the gravel layer forms a certain anaerobic zone, the denitrification is facilitated, the removal effect of the facility on nitrate nitrogen is further enhanced, and the purpose of containing a water storage source is achieved.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of the present invention.
Detailed Description
FIG. 1 is a schematic view of the overall structure of the present invention; FIG. 2 is a top view of the present invention; as shown in the figure, the stepped biological detention device for the pavement runoff of the expressway comprises a pre-sedimentation tank arranged at a side ditch of the expressway and a biological detention tank attached to the pre-sedimentation tank; the biological retention tanks are arranged in a stepped manner from top to bottom, and a flow guide main pipe 15 for guiding flow is arranged on the side wall of each biological retention tank; this technical scheme's biological detention device, through the preliminary sedimentation tank, solid particulate matter in the initial stage rainwater runoff can be got rid of through the sedimentation in the sedimentation tank, the rainwater discharges into biological detention pond through the preliminary sedimentation tank delivery port, and carry out infiltration and purification through biological detention pond filler, rainwater after biological detention pond filler purifies passes through the total drain pipe and flows into road bed bottom escape canal, when rainfall intensity is great, the rainwater then flows into lower rank biological detention pond through overflow drain pipe, and carry out the stagnant through lower rank biological detention pond and hold and purify, the realization is to stagnating the purpose of holding and purifying step by step of going on of highway rainwater runoff.
In the embodiment, the pre-sedimentation tank comprises a reinforced concrete tank body 1, a flow partition plate 4 arranged in the reinforced concrete tank body 1 and a support pile 2 arranged at the bottom of the reinforced concrete tank body 1; and an overflow hole 5 for draining the bioretention pond is formed in the side wall of the reinforced concrete pond body. The pre-sedimentation tank is used for pre-treating after being collected as rainwater, rainwater on a highway pavement A forms runoff B and flows into the pre-sedimentation tank through a side ditch C, the flow partition plate 4 divides the tank body into two parts, the left half part is used for first sedimentation and purification, the rainwater flows into the right half part of the reinforced concrete tank body 1 after being purified to carry out second sedimentation and purification, and the rainwater flows into the inside of the biological retention tank after being purified twice by the reinforced concrete tank body 1.
In this embodiment, the laminating of the biological detention pond tip of cascaded arrangement sets up in reinforced concrete cell body lateral wall, and the top surface in biological detention pond is less than the level of overflow hole 5. The first order (being the most left biological detention pond in figure 1) of the cascaded biological detention pond of arranging forms integral type structure with reinforced concrete cell body 1 fixed connection, and biological detention pond is inside to form one and purifies the cavity, and the level (being the delivery port height) of overflow hole 5 is higher than the height of detention overflow pipe 10 upper port, is convenient for carry out the water conservancy diversion with the rainwater.
In this embodiment, the bioretention tank comprises a bioretention tank body 6, a covering layer 9 arranged in the bioretention tank body 6, a planting soil layer 11, a sand filtering layer 12 and a gravel bearing layer 13; the covering layer, the planting soil layer, the sand filtering layer and the gravel bearing layer are sequentially arranged from top to bottom. The covering layer is located above the planting soil layer and is 50mm thick, the material is hardwood bark, the effects of keeping the lower planting soil wet, preventing particulate matters from blocking the planting soil and providing nutrients for plant growth are achieved, the thickness of the planting soil layer 11 is 50cm, the thickness of the sand filtering layer 12 is 10cm, the thickness of the gravel bearing layer 13 is 30cm, the planting soil layer is preferably formed by mixing river sand and natural soil according to the volume ratio of 2:1, composite filler formed by lignin fibers with the mass ratio of 5% is added after mixing, the river sand is medium coarse sand, the natural soil is surface soil within 1m of the ground surface after the miscellaneous filling soil is locally removed, the river sand and the natural soil are screened by a 2mm screen after air drying, the lignin fibers are organic fibers obtained by chemical treatment of natural wood, the water retention property is good, and the growth of the plant in the bioretention pond is facilitated, the pore structure of the lignin fiber can provide an attachment carrier for the propagation of microorganisms, which is beneficial to the degradation of pollutants in a biological detention pool, and in addition, the lignin fiber can be used as a slow-release carbon source to promote the occurrence of denitrification. Preferably, the plants 8 planted on the planting soil are local flooding-resistant, cold-resistant, developed root systems and evergreen plants.
In this embodiment, the plurality of bioretention ponds have the same structure, and a bottom drain pipe 14 for communicating with a diversion main pipe 15 is arranged in the gravel bearing layer 13. The biological detention pond of stair structure is the same, and the production and processing of being convenient for, a plurality of bottom drain pipes 14 set up side by side, all are responsible for 15 intercommunications with the water conservancy diversion, and the water conservancy diversion is responsible for the slope and is set up the rainwater of being convenient for collect after gravel supporting layer 13 filters.
In this embodiment, a retention overflow pipe 10 is arranged in the biological retention tank, the retention overflow pipe 10 is of an "L" type structure, one end of the retention overflow pipe 10 protrudes higher than the covering layer 9, and the other end of the retention overflow pipe 10 penetrates through the side wall of the biological retention tank. When the rainwater volume is too big, the rainwater can directly be directly discharged through detaining overflow pipe 10, and biological detention bottom of the pool also is provided with spud 7, is convenient for realize the location installation.
In the embodiment, the planting soil layer is a composite filler formed by mixing river sand and natural soil according to the volume ratio of 2:1 and doping lignin fibers with the mass ratio of 5%, the river sand is medium coarse sand, the sand filter layer is river sand, and the gravel bearing layer is 4-8mm bean gravel. The river sand mainly plays a role of a transition layer, so that soil particles in the planting soil layer can be prevented from losing to the gravel bearing layer, and the structural stability and reliability of the biological retention pond are improved.
In the embodiment, the side wall of the pre-sedimentation tank is provided with a rainwater grate 3; the flow guide main pipe 15 is communicated with a drainage ditch D at the bottom of the highway subgrade. Rainwater grate 3 plays the prefiltration effect, prevents in rubbish such as leaf gets into filter equipment, and the water conservancy diversion is responsible for 15 bottoms ends and finally discharges into escape canal D with the rainwater after purifying.
In this embodiment, the bottom drain pipe 14 is installed at a height lower than the height of the top surface of the gravel support layer 13. The height of the bottom drain pipe is slightly lower than that of the top of the gravel bearing layer, so that an anaerobic environment can be formed in the gravel layer, the removal effect of the biological retention tank on nitrate nitrogen can be enhanced, and a water storage source is also realized. Gravel piles 16 are paved at the water outlet of the pre-sedimentation tank, the water outlet of the bioretention tank overflow device and the water outlet of the main drain pipe and used for dispersing water flow and preventing water flow from scouring fillers of the bioretention tank and a roadbed slope, wherein the gravel piles 16 are cobblestones with particles of 2-4 cm.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides a stairstepping biological detention device of highway road surface runoff which characterized in that: the device comprises a pre-sedimentation tank arranged at a side ditch of a highway and a biological retention tank which is attached to the pre-sedimentation tank; the biological detention pond is a plurality of and a plurality of biological detention pond from the top down is cascaded arrangement, be provided with the water conservancy diversion that is used for the water conservancy diversion on the biological detention pond lateral wall and be responsible for.
2. The stepped bioretention device for highway pavement runoff according to claim 1 wherein: the pre-sedimentation tank comprises a reinforced concrete tank body, a flow partition plate arranged in the reinforced concrete tank body and a support pile arranged at the bottom of the reinforced concrete tank body; and an overflow hole for draining the bioretention pond is formed in the side wall of the reinforced concrete pond body.
3. The stepped bioretention device for highway pavement runoff according to claim 2 wherein: the laminating of the biological detention pond tip of cascaded arrangement sets up in reinforced concrete cell body lateral wall, and the top surface in biological detention pond is less than the level of overflow hole.
4. The stepped bioretention device for highway pavement runoff according to claim 3 wherein: the biological retention tank comprises a biological retention tank body, a covering layer, a planting soil layer, a sand filter layer and a gravel bearing layer, wherein the covering layer, the planting soil layer, the sand filter layer and the gravel bearing layer are arranged in the biological retention tank body; the covering layer, the planting soil layer, the sand filtering layer and the gravel bearing layer are sequentially arranged from top to bottom.
5. The stepped bioretention device for highway pavement runoff according to claim 4 wherein: the biological detention tanks have the same structure, and a bottom drain pipe communicated with the flow guide main pipe is arranged in the gravel bearing layer.
6. The stepped bioretention device for highway pavement runoff according to claim 5 wherein: be provided with the detention overflow pipe in the biological detention pond, the detention overflow pipe is "L" type structure, and detention overflow pipe one end protrusion is higher than the overburden, and the detention overflow pipe other end passes biological detention pond lateral wall.
7. The stepped bioretention device for highway pavement runoff according to claim 6 wherein: the planting soil layer is a composite filler formed by mixing river sand and natural soil according to the volume ratio of 2:1 and doping lignin fibers with the mass ratio of 5%, the river sand is medium coarse sand, the sand filter layer is river sand, and the gravel bearing layer is 4-8mm bean gravel.
8. The stepped bioretention device for highway pavement runoff according to claim 7 wherein: a rainwater grate is arranged on the side wall of the pre-sedimentation tank; the diversion main pipe is communicated with a drainage ditch at the bottom of the highway subgrade.
9. The stepped bioretention device for highway pavement runoff according to claim 8 wherein: the installation height of the bottom drain pipe is lower than the height of the top surface of the gravel bearing layer.
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CN114753465A (en) * | 2022-04-21 | 2022-07-15 | 中铁十九局集团矿业投资有限公司 | Drainage system and drainage method for pit side slope of strip mine |
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CN114718149A (en) * | 2022-04-02 | 2022-07-08 | 吕永华 | Sponge urban rainwater treatment and recycling integrated equipment |
CN114753465A (en) * | 2022-04-21 | 2022-07-15 | 中铁十九局集团矿业投资有限公司 | Drainage system and drainage method for pit side slope of strip mine |
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Application publication date: 20210803 |