CN111206472A - Permeable pavement drainage structure - Google Patents
Permeable pavement drainage structure Download PDFInfo
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- CN111206472A CN111206472A CN202010162604.1A CN202010162604A CN111206472A CN 111206472 A CN111206472 A CN 111206472A CN 202010162604 A CN202010162604 A CN 202010162604A CN 111206472 A CN111206472 A CN 111206472A
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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
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
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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
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
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- 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
- E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
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- 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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The invention belongs to the technical field of road drainage design, and particularly relates to a permeable pavement drainage structure. The water-saving road comprises a drainage road, an organic-non isolation belt and a vertical kerb arranged between the drainage road and the organic-non isolation belt. The drainage road sequentially comprises a roadbed, a non-permeable pavement lower layer structure and a permeable pavement upper layer structure from bottom to top, and the permeable pavement upper layer structure is internally provided with mutually communicated permeable pores; the drainage road plane is provided with 1.5 to 3 percent of cross slopes. The side wall of the vertical kerb is provided with a first drainage hole and a second drainage hole, and the height of the upper surface of the upper layer structure of the permeable pavement is positioned between the upper edge and the lower edge of the first drainage hole; the upper surface of the non-permeable pavement lower layer structure is positioned between the upper edge and the lower edge of the second drain hole, and the height of the upper surface of the filler in the non-permeable pavement is lower than that of the lower edge of the first drain hole. By arranging a plurality of drainage ways, the pavement drainage speed is accelerated, rainwater is collected and drained to a non-isolated area, and the rainwater is retained in a storage facility after purification.
Description
Technical Field
The invention belongs to the technical field of road drainage design, and particularly relates to a permeable pavement drainage structure.
Background
With the great improvement of the urbanization level of China, the hardening pavement area is increased sharply, the original ecological system is destroyed, and the original natural ecological background and hydrological characteristics of the city are changed. More than 70% of rainfall forms runoff to be discharged, so that the city cannot hold water, and the phenomena of waterlogging caused by heavy rain and drought after rain occur. The sponge city is a historical and strategic transition from the engineering drainage era of quick drainage, timely and nearby drainage and quick drainage to 'seepage, stagnation, storage, purification, use and drainage' integrated comprehensive drainage and ecological drainage.
In China, experimental research on sand-free macroporous concrete is carried out from the 50 th of the 20 th century, and in the 70 th of the 20 th century, in order to rescue the ancient villages, some building blocks with water permeability and air permeability are developed and used for paving squares and roads of royal gardens. In 1993, a project of 'research on water-permeable concrete and water-permeable concrete pavement bricks' was developed by the Chinese building materials science research institute, and the project is applied to pilot engineering from 1995 to achieve a good effect. In 2005, the research center of medium building materials engineering performed systematic studies on the properties of pervious concrete, and has gained some applications in the olympic park of beijing.
The motor vehicle road sets up the aspect of permeating water and can avoid surface gathered water, avoids the driving water float phenomenon of skidding to appear, improves bituminous paving rainy day safety in utilization greatly, has the good function of making an uproar of falling simultaneously. Water discharged from the existing permeable pavement is basically discharged through a drainage pipeline, no stagnation, purification and use are realized, and the water resource utilization effect is not obvious.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a permeable pavement drainage structure, which at least solves the problems that the water discharged by the existing drainage pavement is not well purified and reserved for use and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
a permeable pavement drainage structure comprising:
the drainage road sequentially comprises a roadbed, a non-permeable pavement lower layer structure and a permeable pavement upper layer structure from bottom to top, and the permeable pavement upper layer structure is internally provided with mutually communicated permeable pores; 1.5% -3% of cross slopes are arranged on the drainage road plane; the drainage road is a motor vehicle lane, a non-motor vehicle lane or a sidewalk;
the machine-non isolation belt is arranged between the motor vehicle lane and the non-motor vehicle lane, has an isolation greening function, and is internally provided with an overproof rainwater overflow well;
the vertical kerbstone is arranged between the motor vehicle lane and the non-isolation belt and is formed by sequentially connecting a plurality of curbstones, a first drainage hole and a second drainage hole are formed in the side wall of the vertical kerbstone, the height of the upper surface of the permeable pavement upper layer structure is positioned between the upper edge and the lower edge of the first drainage hole, and the height of the upper surface of the non-permeable pavement lower layer structure is positioned between the upper edge and the lower edge of the second drainage hole; the height of the upper surface of the filler in the non-isolated belt is lower than the lower edge of the first drainage hole.
In the permeable pavement drainage structure, the upper layer structure of the permeable pavement preferably has a porosity of 8-20%; the water seepage coefficient of the upper layer structure of the permeable pavement is not less than 800 ml/min; preferably, the communication porosity of the upper layer structure of the permeable pavement is 5-20%; the porosity of the lower layer structure of the non-permeable pavement is not more than 3%, the communication pore is not more than 0.5%, and the water permeability coefficient is not more than 120 ml/min.
In the permeable pavement drainage structure as described above, as a preferable aspect, the drainage road further includes a permeable pavement middle layer structure provided between the permeable pavement upper layer structure and the non-permeable pavement lower layer structure; the nominal maximum particle size of the aggregate of the permeable pavement middle layer structure is larger than that of the aggregate of the permeable pavement upper layer structure, and mutually communicated permeable pores are arranged in the permeable pavement middle layer structure; preferably, the porosity of the middle layer structure of the permeable pavement is 8% -25%, and the porosity of the middle layer structure of the permeable pavement is greater than the porosity of the upper layer structure of the permeable pavement; the water seepage coefficient of the middle layer structure of the permeable pavement is not less than 1000ml/min, and the water seepage coefficient of the middle layer structure of the permeable pavement is greater than that of the upper layer structure of the permeable pavement.
In the permeable pavement drainage structure, as a preferred scheme, a water-resisting layer is arranged between the permeable pavement middle layer structure and the non-permeable pavement lower layer structure, and the water-resisting layer prevents water above the water-resisting layer from entering the non-permeable pavement lower layer structure; preferably, the water-resisting layer is a slurry seal layer.
In the permeable pavement drainage structure, as a preferable scheme, the permeable pavement drainage structure further comprises a flat curb, wherein the flat curb is formed by sequentially splicing a plurality of stone slabs, the stone slabs are sequentially connected and paved between the vertical curb and the motor vehicle lane edge, and the upper surface of the flat curb is flush with the motor vehicle lane edge in height; and a third drain hole is formed in the flat stone, the third drain hole and the second drain hole are positioned on the same horizontal plane, one end of the third drain hole is connected with the second drain hole, and the other end of the third drain hole is connected with the edge of the motor vehicle lane.
In the permeable pavement drainage structure, as a preferable scheme, the roadbed comprises a cement-stabilized gravel layer, the cement-stabilized gravel layer is positioned on a clay foundation, and permeable oil or a bonding layer is arranged between the lower layer structure of the impermeable pavement and the upper surface of the cement-stabilized gravel layer; an anti-seepage isolation layer is arranged between the filler in the machine non-isolation belt and the motor vehicle lane, so that water is prevented from entering the motor vehicle lane through the machine non-isolation belt.
In the above-described permeable pavement drainage structure, preferably, the impermeable separation layer is laid along the lower side of the flat kerbstone and the vertical kerbstone and between the filler in the machine-non-separation zone and the motor vehicle lane, one side of the impermeable separation layer is partially overlapped and overlapped with the permeable oil or the bonding layer, and the other side of the impermeable separation layer is partially overlapped and overlapped with the lower surface of the filler in the machine-non-separation zone.
In the permeable pavement drainage structure, the overflow well is preferably a vertical well, and an opening at the lower part of the overflow well is connected with a municipal drainage pipeline so as to drain water in the overflow well; be provided with the floral tube in the filler in quick-witted non-median, the floral tube is followed the length direction of quick-witted non-median distributes, the pipe wall of floral tube is provided with the hole of permeating water, the floral tube passes the overflow well.
In the permeable pavement drainage structure, as a preferable scheme, the mechanical and non-isolation belt comprises a planting soil layer and a filter layer from top to bottom, and the flower tubes are arranged in the filter layer; preferably, the filtering layer comprises a plurality of layers of filtering materials, and the floral tube is positioned at the bottom end of the filtering layer.
In the permeable pavement drainage structure, as a preferable scheme, the pipe wall of the floral pipe positioned in the overflow well is not provided with permeable holes, a purified water reservoir is arranged in the filter layer, and the floral pipe is communicated with the purified water reservoir; the machine non-median of water purification cistern top is provided with the irrigation equipment that draws water, is convenient for extract water purification in the water purification cistern irrigates extremely in the planting soil layer.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention provides a permeable pavement drainage structure, aiming at the characteristics of insufficient water permeability, blockage resistance and other performances of the traditional pavement, the drainage pavement of the permeable pavement drainage structure is provided with a porous structure, so that accumulated water on the pavement can be effectively reduced, the phenomenon of water drift and slipping during driving is avoided, the use safety of an asphalt pavement in rainy days is greatly improved, and the permeable pavement drainage structure has a good noise reduction function. Through the double-layer permeable asphalt concrete structure with the upper part being thin and the lower part being thick, the blocking probability of fine dust and pollutants can be reduced, the service life of the pavement is prolonged, and the difficulty in maintaining the pavement is reduced. The water and impurities flowing into the permeable pavement upper layer structure and the permeable pavement middle layer structure are discharged in time by arranging the first water discharge hole with large flow rate to discharge accumulated water on the pavement in time and arranging the second water discharge hole and the third water discharge hole. And the standard exceeding rainwater overflow well is combined for drainage, so that the pavement drainage capability is greatly improved. According to the invention, the floral tube is arranged at the bottom end of the machine non-isolation belt, so that redundant water in the machine non-isolation belt is discharged, and water accumulation in the machine non-isolation belt is avoided. Through setting up the water purification cistern, reserve the irrigation as the interior vegetation of machine non-median with the water of infiltration, improved the rainwater greatly and held back the utilization ratio.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic structural view of a permeable pavement drainage structure according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a vertical kerb and a horizontal kerb in the embodiment of the present invention;
FIG. 3 is a longitudinal cross-sectional view of a non-separator strip according to an embodiment of the present invention;
fig. 4 is a partially enlarged view of a portion a in fig. 1.
In the figure: 1. a machine-non isolation belt; 2. a non-permeable pavement lower layer structure; 3. an upper layer structure of the permeable pavement; 4. an overproof rainwater overflow well; 5. a kerbstone; 6. erecting a kerb stone; 7. a first drain hole; 8. a second drain hole; 9. a middle layer structure of the permeable pavement; 10. a water barrier layer; 11. a flat kerbstone; 12. a stone slab; 13. a third drain hole; 14. a cement stabilized rubble layer; 15. a tie layer (or strike-through oil); 16. an anti-seepage isolation layer; 17. a cement concrete cushion layer; 18. a concrete back; 19. a fourth drain hole; 20. municipal drainage lines; 21. a floral tube; 24. planting a soil layer; 25. a filter layer; 26. a coarse sand layer; 27. a melon seed sheet layer; 28. a gravel layer; 29. a purified water reservoir; 30. a pumped irrigation device; 31. a non-motorized lane; 32. a motor vehicle lane.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
According to an embodiment of the present invention, as shown in fig. 1 to 4, the present invention provides a permeable pavement drainage structure including a drainage road, a machine-non-isolation belt 1 and a curb 6.
The drainage road comprises a roadbed, a non-permeable pavement lower layer structure 2 and a permeable pavement upper layer structure 3, wherein the non-permeable pavement lower layer structure 2 is arranged on the roadbed, the permeable pavement upper layer structure 3 is laid on the surface of the non-permeable pavement lower layer structure 2, and mutually communicated permeable pores are arranged in the permeable pavement upper layer structure 3; 1.5 to 3 percent of cross slopes are arranged on the plane of the drainage road surface; the drainage road is a motor vehicle lane 32, a non-motor vehicle lane 31 or a sidewalk.
The machine-non isolation belt 1 is arranged between the motor vehicle lane 32 and the non-motor vehicle lane 31, has the functions of isolation and greening, and is internally provided with the standard-exceeding rainwater overflow wells 4 at intervals.
The vertical kerbstone 6 is arranged between the motor vehicle lane 32 and the non-mechanical isolation belt 1 and is formed by sequentially connecting a plurality of curbstones 5, a first drainage hole 7 and a second drainage hole 8 are formed in the side wall of the vertical kerbstone 6, the height of the upper surface of the permeable pavement upper-layer structure 3 close to one side of the vertical kerbstone 6 is positioned between the upper edge and the lower edge of the first drainage hole 7, and the first drainage hole is used for draining excessive rainwater; the upper surface of the non-permeable pavement lower layer structure 2 close to one side of the vertical kerb 6 is positioned between the upper edge and the lower edge of a second drainage hole 8, and the second drainage hole is used for collecting rainwater permeating into the pavement; the height of the upper surface of the filler in the machine non-isolation belt 1 is lower than the lower edge of the first drain hole 7.
When the rain-proof road surface rain-proof device is used, when the road surface is in heavy rainfall in a short time, excessive rainwater on the road surface of the motor vehicle is discharged into the non-mechanical isolation belt 1 through the first water discharge hole 7 on the side wall of the vertical kerb 6 and is discharged through the standard-exceeding rainwater overflow well 4, and the accumulated water on the road surface is avoided. Meanwhile, part of water is filtered by the permeable pavement upper-layer structure 3 and is discharged into the mechanical and non-isolation belt 1 through the second water discharge hole 8, and when fillers in the mechanical and non-isolation belt 1 reach the maximum water seepage amount, the excessive water is discharged through the standard exceeding rainwater overflow well 4. When the precipitation on the road surface is less, the water is filtered by the permeable road surface upper layer structure 3 and is discharged into the mechanical and non-isolation belt 1 through the second drain hole 8, and permeates into the filler in the mechanical and non-isolation belt 1 to realize the permeation. The whole process ensures that no water is accumulated on the road surface.
The other side of the non-mechanical isolation belt 1 is a non-motor vehicle lane 31, and water in the non-motor vehicle lane 31 is discharged outwards and is not discharged into the non-mechanical isolation belt 1.
Further, the porosity of the upper layer structure of the permeable pavement is 8-20% (e.g. 10%, 12%, 14%, 16%, 18%); the water permeability coefficient of the upper layer structure of the permeable pavement is not less than 800ml/min, preferably 800-1000 ml/min (such as 820ml/min, 840ml/min, 860ml/min, 880ml/min, 900ml/min, 920ml/min, 940ml/min, 960ml/min and 980ml/min), and preferably the communication porosity of the upper layer structure of the permeable pavement is 5-20%;
the porosity of the lower layer structure of the non-permeable pavement is not more than 3%, the communication pore is not more than 0.5%, and the water permeability coefficient is not more than 120 ml/min.
Further, the drainage road further comprises a permeable pavement middle layer structure 9, and the permeable pavement middle layer structure 9 is arranged between the permeable pavement upper layer structure 3 and the non-permeable pavement lower layer structure 2; the aggregate nominal maximum grain diameter of the permeable pavement middle layer structure 9 is larger than that of the permeable pavement upper layer structure 3, and mutually communicated permeable pores are arranged in the permeable pavement middle layer structure 9. Preferably, the porosity of the middle layer structure of the permeable pavement is 8% -25%, and the porosity of the middle layer structure of the permeable pavement is greater than the porosity of the upper layer structure of the permeable pavement; the water permeability coefficient of the middle layer structure of the permeable pavement is not less than 1000ml/min, preferably 1000-1300 ml/min (such as 1050ml/min, 1100ml/min, 1150ml/min, 1200ml/min, 1250ml/min and 1280ml/min), and is greater than that of the upper layer structure of the permeable pavement.
Because the nominal maximum particle size of the aggregate of the permeable pavement middle layer structure 9 is larger than that of the permeable pavement upper layer structure 3, the porosity and the water permeability coefficient of the permeable pavement middle layer structure 9 are both larger than those of the permeable pavement upper layer structure 3; the pore diameter in the permeable pavement upper layer structure 3 is smaller than the pore diameter of the permeable pavement middle layer structure 9, the blocking probability of fine dust and pollutants can be reduced by arranging the colloidal particle permeable asphalt concrete double-layer structure with the shape of being thin at the top and thick at the bottom, when the permeable pavement upper layer structure 3 is used, after the pores are blocked, only a high-pressure flushing vehicle is needed for flushing the pavement, impurities blocked in the pores are flushed to the permeable pavement middle layer structure 9, because the pore diameter in the permeable pavement middle layer structure 9 is larger than the diameter of the impurities, the impurities can be discharged through the pores in the permeable pavement middle layer structure 9, and therefore the problem that the deep pores of the single-layer drainage pavement are blocked and cleaned difficultly is avoided, and the drainage capacity is reduced. In the embodiment, the permeable pavement upper layer structure 3 adopts a PAC13 and PAC10 drainage bituminous concrete structure with the thickness of 4 cm; the middle layer structure 9 of the permeable pavement adopts a PAC20 or PAC16 drainage bituminous concrete structure with the thickness of 5 cm; the impervious pavement understructure 2 adopts 8cm thick AC25 dense-graded asphalt concrete.
Further, a water-resisting layer 10 is arranged between the permeable pavement middle layer structure 9 and the non-permeable pavement lower layer structure 2, and the water-resisting layer 10 prevents water above from entering the non-permeable pavement lower layer structure 2. So as to prevent the infiltration rainwater from entering the roadbed through the non-permeable pavement substructure 2, and also effectively prevent the large-particle size AC25 asphalt concrete in the non-permeable pavement substructure 2 from being damaged. Preferably, the water-resisting layer 10 is a slurry seal layer, the thickness of the water-resisting layer 10 is controlled to be 5mm, SBS modified emulsified asphalt is adopted, and aggregate is 0-3 mm limestone chips.
Further, the stone slab comprises a flat stone 11, wherein the flat stone 11 is formed by sequentially splicing a plurality of stone slabs 12, the stone slabs 12 are sequentially connected and paved between the vertical stone 6 and the edge of the motor vehicle lane 32, and the upper surface of the flat stone 11 is flush with the edge of the motor vehicle lane 32 in height; a third drain hole 13 is formed in the flat stone 11, the third drain hole 13 and the second drain hole 8 are located on the same horizontal plane, one end of the third drain hole 13 is connected with the second drain hole 8, and the other end of the third drain hole is connected with the edge of the motor vehicle lane 32. In this embodiment, for the convenience of processing, and also for ensuring the strength of the stone slabs 12, semicircular grooves are respectively formed on two sides of each stone slab 12, two adjacent stone slabs 12 are connected, and the semicircular grooves on the side edges of the adjacent stone slabs are oppositely buckled to form the third drainage holes 13.
Further, the roadbed comprises a cement-stabilized gravel layer 14, the cement-stabilized gravel layer 14 is positioned on the clay foundation, and a permeable layer oil or bonding layer 15 is arranged between the lower layer structure 2 of the non-permeable pavement and the upper surface of the cement-stabilized gravel layer 14; an impermeable isolation layer 16 is arranged between the filler in the non-mechanical isolation belt 1 and the motor vehicle lane 32, so that water is prevented from entering the motor vehicle lane 32 through the non-mechanical isolation belt 1.
Further, the anti-seepage isolation layer 16 is laid along the lower portions of the flat kerbs 11 and the vertical kerbs 6 and is laid between the filler in the non-mechanical isolation belt 1 and the motor vehicle lane 32, one side edge of the anti-seepage isolation layer 16 is partially overlapped and lapped with the permeable oil or the bonding layer 15, and the other side edge of the anti-seepage isolation layer 16 is partially overlapped and lapped with the lower surface of the filler in the non-mechanical isolation belt 1. In this embodiment, the barrier layer 16 is a waterproof geotextile. The lapping width of the two transverse side edges of the seepage-proofing isolation layer 16 is more than 50 cm. In other embodiments of the invention, barrier layer 16 may be provided in a two-cloth-one-film configuration (i.e., two geotextiles sandwiching a membrane). An impermeable barrier 16 is also provided between the machine non-barrier belt 1 and the non-motor vehicle lane 31.
In the embodiment, for the firm installation of the vertical kerb 6 and the flat kerb 11, a concrete cushion layer 17 is paved below the vertical kerb 6 and the flat kerb 11, a concrete backrest 18 is poured in the non-isolation belt 1 and is close to the vertical kerb 6, the concrete backrest 18 is supported on one side of the vertical kerb 6, a fourth water drainage hole 19 is preset on the concrete backrest 18, the fourth water drainage hole 19 is communicated with the second water drainage hole 8, and the height of the fourth water drainage hole 19 is not higher than that of the second water drainage hole 8. The upper surface of the concrete back 18 is located below the level of the lower edge of the first drain hole 7.
Furthermore, the standard-exceeding rainwater overflow well 4 is a vertical well, and an opening at the lower part of the standard-exceeding rainwater overflow well 4 is connected with the municipal drainage pipeline 20, so that water in the standard-exceeding rainwater overflow well 4 can be conveniently drained. Be provided with floral tube 21 in the filler in quick-witted non-median 1, floral tube 21 distributes along quick-witted non-median 1's length direction, and the pipe wall of floral tube 21 is provided with the hole of permeating water, and floral tube 21 passes standard rainwater overflow well 4. When the water treatment device is used, water discharged from the permeable pavement upper layer structure 3 and the permeable pavement middle layer structure 9 and water falling into the organic non-isolation belt 1 are subjected to storage stagnation filtration of fillers in the organic non-isolation belt 1, redundant water permeates into the perforated pipe 21 through the permeable holes in the pipe wall of the perforated pipe 21 and is discharged into the overproof rainwater overflow well 4 through the permeable holes in the wall of the perforated pipe 21 positioned in the overproof rainwater overflow well 4, and therefore the phenomenon that the vegetation growth is influenced by accumulated water in the organic non-isolation belt 1 is avoided. In this embodiment, the outer wall of the perforated pipe 21 is wrapped with a filter screen, such as a non-woven geotextile, to intercept soil and sand in water and prevent the soil and sand from entering the perforated pipe 21 with water and blocking the perforated pipe 21. Specifically, the inner diameter of the perforated pipe 21 is 100mm, and the diameter of the water permeable holes is 30 mm. The perforated pipe 21 is made of PE.
Further, the non-mechanical isolation belt 1 comprises a planting soil layer 24 and a filter layer 25 from top to bottom, and the floral tube 21 is arranged in the filter layer 25; preferably, the filter layer 25 comprises multiple layers of filter material, and the floral tube 21 is located at a bottom end of the filter layer 25. In this embodiment, the filter layer 25 comprises, from top to bottom, a 10cm thick coarse sand layer 26, a 20cm thick melon seed layer 27 (commonly known as "gravel" in architecture, which is broken up by a breaker and is known as "gravel", which is a processed stone chip having a particle size of 5-10mm, commonly known as "melon seed chip" and is widely used in basic decoration engineering), and a 41cm thick gravel layer 28, in which the gravel has a particle size of 60-80 mm. The floral tube 21 is located in the gravel layer 28. By filtering layer by layer, the water flowing into the perforated pipe 21 is prevented from blocking the perforated pipe 21 by carrying soil and sand.
Furthermore, the pipe wall of the floral tube 21 in the overproof rainwater overflow well 4 is provided with a water-permeable hole, a purified water reservoir 29 is arranged in the filter layer 25, and the floral tube 21 is communicated with the purified water reservoir 29; a water pumping irrigation device 30 is arranged in the non-isolated area 1 above the water purification reservoir 29, and the water pumping end of the water pumping irrigation device 30 extends into the water purification reservoir 29, so that purified water in the water purification reservoir 29 can be conveniently pumped and irrigated into the planting soil layer 24. When the rainwater storage and irrigation device is used, when raining, water filtered to the flower pipe 21 through penetration is stored in the water purification reservoir 29, and when vegetation in the non-isolation belt 1 needs to be irrigated, the water pumping and irrigation device 30 can be opened to pump out the water in the water purification reservoir 29 for use, so that the rainwater utilization rate is improved, and the storage and use degree is realized.
In conclusion, the permeable pavement drainage structure provided by the invention aims at the characteristics of insufficient water permeability, blockage resistance and other performances of the traditional pavement, and provides the double-layer permeable asphalt concrete layer, wherein the double-layer permeable asphalt concrete layer has a porous structure, can effectively reduce water accumulation on the pavement, avoids the phenomenon of water drift and slip during driving, greatly improves the use safety of the asphalt pavement in rainy days, and has a good noise reduction function. Through the double-layer permeable asphalt concrete structure with the upper part being thin and the lower part being thick, the blocking probability of fine dust and pollutants can be reduced, the service life of the pavement is prolonged, and the difficulty in maintaining the pavement is reduced. The water and impurities flowing into the permeable pavement upper layer structure and the permeable pavement middle layer structure are discharged in time by arranging the first water discharge hole with large flow rate to discharge accumulated water on the pavement in time and arranging the second water discharge hole and the third water discharge hole. And the standard exceeding rainwater overflow well is combined for drainage, so that the pavement drainage capability is greatly improved. According to the invention, the floral tube is arranged at the bottom end of the machine non-isolation belt, so that redundant water in the machine non-isolation belt is discharged, and water accumulation in the machine non-isolation belt is avoided. Through setting up the water purification cistern, reserve the irrigation as the interior vegetation of machine non-median with the water of infiltration, improved the rainwater greatly and held back the utilization ratio.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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| CN202010162604.1A CN111206472A (en) | 2020-03-10 | 2020-03-10 | Permeable pavement drainage structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203475267U (en) * | 2013-09-06 | 2014-03-12 | 广州市恒盛建设工程有限公司 | Curb for water-permeable asphalt greenway pavement |
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