CN113550397A - Road water storage and drainage system and road construction method - Google Patents
Road water storage and drainage system and road construction method Download PDFInfo
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- CN113550397A CN113550397A CN202110712552.5A CN202110712552A CN113550397A CN 113550397 A CN113550397 A CN 113550397A CN 202110712552 A CN202110712552 A CN 202110712552A CN 113550397 A CN113550397 A CN 113550397A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
-
- 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
-
- 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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-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
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/041—Accessories therefor
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
-
- 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
- E03F5/102—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins using already existing parts of the sewer system for runoff-regulation
-
- 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
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/18—Tanks for disinfecting, neutralising, or cooling sewage
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
- Sewage (AREA)
Abstract
The invention relates to the technical field of road water storage and drainage, in particular to a road water storage and drainage system and a road construction method. The embodiment of the invention can lead the rainwater on the pavement of the roadway to flow into the diversion trench through the first through hole preferentially through the water retaining bank arranged on at least one side of the rainwater inlet and the curb provided with the first through hole, and the diversion trench is communicated with the water storage trench, and the trench bottom of the diversion trench is higher than the trench bottom of the water storage trench; therefore, rainwater on the pavement of the roadway can flow into the water storage ditch through the first through hole and the water diversion ditch; in addition, a part of rainwater falling on the green belt can permeate into the diversion trench through the second pavement layer, so that the rainwater flows into the water storage trench through the diversion trench, and the rest rainwater flows to the sidewalk; and rainwater falling on the sidewalk can permeate into the water storage ditch through the first pavement layer. A part of water entering the water storage ditch slowly seeps underground to contain underground water; when the water level in the water storage ditch exceeds the water inlet of the drainage tubule, rainwater in the water storage ditch flows into the rainwater port through the drainage tubule, so that the rainwater can enter the municipal rainwater pipe network through the rainwater port.
Description
Technical Field
The invention relates to the technical field of road water storage and drainage, in particular to a road water storage and drainage system and a road construction method.
Background
Along with the continuous development of economy and society and the promotion of rapid urbanization construction, the urban development intensity is higher and higher, the original natural ecological background and hydrological characteristics are changed by a large amount of hard pavement of roads, and the contradiction between cities and the environment is increasingly prominent in the phenomenon of coexistence of waterlogging and water shortage in the cities. In recent years, "waterlogging when raining" has become a difficult problem of "headaches" in many cities, and meanwhile, a series of problems such as deterioration of water ecology, shortage of water resources, water environment pollution and lack of guarantee of water safety are brought.
In the process of implementing the invention, the inventor finds that in the related technology, the road water storage and drainage structure usually adopts a permeable pavement and a shallow grass ditch to perform rainwater percolation; however, the permeable ground and the shallow grass ditches are only suitable for areas with good soil permeability and low underground water level, and if the permeable ground and the shallow grass ditches are used for areas with low soil permeability coefficient, the water storage and drainage capacity is greatly reduced.
Disclosure of Invention
In order to solve the problem that the road water storage and drainage capability of an area with low soil permeability coefficient is poor, the embodiment of the invention provides a road water storage and drainage system and a road construction method, rainwater of a roadway, a green belt and a sidewalk can be collected into a water storage layer below a pedestrian path, water stored in the water storage layer can permeate underground, underground water can be stored, and the water can also be discharged into a municipal drainage network pipe through a drainage thin pipe, so that the water storage and drainage capability of the road water storage and drainage system can be improved.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a road drainage system, configured to store and drain water on a road, where the road includes a roadway, a curb, a green belt, and a sidewalk, which are sequentially arranged, where the curb includes a porous curb, the porous curb is provided with a first through hole, the sidewalk includes a first road surface layer, and the green belt includes a second road surface layer;
the system comprises:
the water storage layer is arranged below the first pavement layer and comprises first water storage filler and a water storage groove arranged along the extending direction of the pavement, and the first water storage filler is filled in the water storage groove;
a plurality of gullies disposed at an edge of the roadway and proximate to the curb, the gullies including gullies;
the diversion trenches are arranged below the second road surface layer and between the rainwater openings and the water storage trenches, one ends of the diversion trenches are close to the rainwater openings, the other ends of the diversion trenches are communicated with the water storage trenches, and the trench bottoms of the diversion trenches are higher than the trench bottoms of the water storage trenches;
the second water storage filler is filled in the diversion trench;
the drainage tubule comprises a water inlet and a water outlet, the water inlet is arranged in the first water storage filler layer, the water outlet is arranged in the rainwater well, and the drainage tubule is used for discharging rainwater with the water level higher than the water inlet in the water storage ditch into the rainwater inlet so as to reduce the load of rainstorm on a municipal rainwater pipe network;
the rainwater drainage channel comprises a rainwater inlet, a rainwater retaining bank, a perforated curb and a water retaining bank, wherein the rainwater inlet is communicated with the rainwater inlet, the water retaining bank is arranged on at least one side of the rainwater inlet, the perforated curb and the water retaining bank are arranged on the same side of the rainwater inlet, the water retaining bank is used for enabling rainwater on a roadway to flow along the roadside, the priority of the first through hole is higher than that of the rainwater well, and the first through hole is used for guiding rainwater to flow into the diversion ditch.
Optionally, the gutter is perpendicular to the gutter.
Optionally, the rainwater well comprises a well wall, a second through hole is formed in one side, close to the water storage ditch, of the well wall, and one end, close to the water outlet, of the drainage thin pipe is located in the second through hole.
Optionally, the first and/or second impounded fillers comprise at least one of crushed stone, tile fragments and waste concrete fragments.
Optionally, the first road surface layer includes a permeable pavement material, a permeable cushion layer and a first isolation layer, which are sequentially arranged from top to bottom.
Optionally, the water permeable cushion comprises at least one of medium sand, stone dust slag and regenerated fine bone.
Optionally, the second pavement layer includes a greening tree pool, a permeable pavement material and/or a planting soil layer.
Optionally, the second pavement layer further comprises a second isolation layer;
when the second pavement layer comprises a permeable pavement material, the second isolation layer is positioned between the permeable pavement material and the second water-retaining filler;
when the second pavement layer comprises a planting soil layer, the second isolation layer is positioned between the planting soil layer and the second isolation layer.
In a second aspect, an embodiment of the present invention further provides a method for constructing a road, where the road includes a pre-installed roadway, a green belt, a continuously-laid kerb, a sidewalk, and a plurality of gullies, the gullies are disposed at an edge of the roadway and are close to the kerb, the roadway, the kerb, the green belt, and the sidewalk are sequentially disposed, the gullies include gullies, the kerbs include porous kerbs, and the porous kerbs are pre-provided with first through holes, the method includes:
excavating a water storage ditch on the sidewalk, wherein the water storage ditch is arranged along the extending direction of the sidewalk;
a diversion trench is dug on a green belt between the rainwater inlet and the water storage trench, one end of the diversion trench is close to the rainwater inlet, the other end of the diversion trench is communicated with the water storage trench, and the trench bottom of the diversion trench is higher than the trench bottom of the water storage trench;
filling a first water storage filler in the water storage channel;
paving drainage tubules at the bottom of the diversion trench so that water inlets and water outlets of all the drainage tubules are respectively positioned in the first water storage filler and the rainwater well;
filling a second water storage filler in the gutter;
a water retaining bank is arranged on at least one side of the gutter inlet, the water retaining bank and the porous curb are positioned on the same side of the gutter inlet, the water retaining bank is positioned between a first through hole and the gutter inlet and used for enabling rainwater of the roadway to flow into the gutter through the first through hole with higher priority than rainwater of the roadway flows into the gutter, and the first through hole is used for guiding the rainwater to flow into the diversion trench;
paving a first pavement layer above the first water storage filler;
and laying a second pavement layer above the second water storage filler.
Optionally, the method of excavating a water storage trench on the sidewalk includes:
determining the size of the cross-sectional area of the water storage channel according to the rainfall and the soil permeability coefficient of a construction site;
and excavating the water storage ditch on the sidewalk according to the size of the cross section area.
The beneficial effects of the embodiment of the invention are as follows: different from the situation of the prior art, the road water storage and drainage system and the road construction method provided by the embodiment of the invention can enable rainwater on the pavement of the roadway to flow into the diversion trench through the first through hole more preferentially than rainwater flowing into the rainwater port through the water retaining ridge arranged on at least one side of the rainwater port and the curb provided with the first through hole, and the diversion trench is communicated with the water storage trench, and the trench bottom of the diversion trench is higher than the trench bottom of the water storage trench; therefore, rainwater on the pavement of the sidewalk can flow into the water storage ditch through the first through hole and the water diversion ditch; in addition, most of rainwater on the green belt pavement can permeate into the diversion trench through the second pavement layer, so that the rainwater flows into the water storage trench through the diversion trench, and the rest rainwater flows to the sidewalk; rainwater on the pavement of the sidewalk can permeate into the water storage ditch through the first pavement layer; a part of water entering the water storage ditch slowly seeps underground to contain underground water; when the water level in the water storage ditch exceeds the water inlet of the drainage tubule, rainwater in the water storage ditch flows into the rainwater port through the drainage tubule, so that the rainwater can enter the municipal rainwater pipe network through the rainwater port.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic structural diagram of a road water storage and drainage system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a road construction method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Furthermore, the references to "left", "right", "front", and "rear" and the like indicate orientations and positional relationships based on those shown in the drawings, and are only for the purpose of describing the present invention or for the convenience of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Sponge city means: the city can be like a sponge, has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters and the like, absorbs water, stores water, seeps water and purifies water in the rainy period, and releases the stored water when needed. The construction of the sponge city takes the construction of a rainwater system with low influence on development as a basic principle, the rainwater is temporarily stored and slowly seeps or collects into an ecological water system, the urban drainage burden is relieved, simultaneously, the capability of resisting rainstorm of the original municipal drainage facility is effectively improved, underground water, revived spring water and a conservation water source are supplemented, and the natural water system environment on the surface of the city is recovered.
At present, the main characteristics of urban drainage systems are that rainwater is required to be gathered into municipal drainage pipelines through a road surface, finally discharged out of urban pipe networks as soon as possible, and flows into rivers and lakes outside cities, so that more than 80% of rainwater is rapidly discharged, urban underground water cannot be supplemented, and rainwater resources cannot be fully utilized. Particularly, in regions with low soil permeability coefficients such as Shenzhen and Wuxi, the water storage and drainage capacity of the road is poor. Based on the above, the embodiment of the invention provides a road drainage system and a road construction method, which can be used for gradually discharging rainwater in a water storage layer to a rainwater port through a drainage thin pipe by arranging the water storage ditch and the water storage filler of a sidewalk as the water storage layer, thereby improving the water storage and drainage capacity of a road.
The embodiment of the invention provides a road water storage and drainage system which is used for water storage and drainage of roads. The road comprises a roadway, a curb, a green belt and a sidewalk which are arranged in sequence. Fig. 1 schematically shows the structure of a road drainage system. As shown in fig. 1, the roadway includes a roadway surface 11, a roadway base layer 12, and an original soil layer 13, which are sequentially arranged. One side of the roadway close to the curb is provided with a rainwater port 14; the rainwater inlet 14 refers to a facility for collecting surface water by a pipeline drainage system and is connected with a municipal rainwater pipe; the gully 14 is usually installed on both sides of the road, and the gully is illustrated as being installed on one side of the road in fig. 1.
In some embodiments, at least one side of the gully 14 is provided with a water dam 15, the water dam 15 being provided on one or both sides of the respective gully. For example: if the gutter inlet 14 is positioned on a sloping roadway, only the water retaining bank 15 needs to be arranged on the side with the higher terrain of the gutter inlet 14; if the gutter inlet 14 is disposed on a flat roadway, the water dams 15 need to be disposed on both sides of the gutter inlet 14. For the perforated curb 21 and the water dam 15 disposed on the same side of each gully 14, the perforated curb 21 is far from the gully 14 relative to the water dam 15. The perforated curb 21 includes a first through hole 211. The water blocking ridge 15 is used for guiding rainwater to flow into the first through hole 211. The water blocking weir 15 can block the water flowing to the gutter inlet 14 along the roadside of the roadway and flow into the first through hole 211 preferentially. One side of the first through hole 211 close to the gutter inlet 14 is provided with a water hole grate 212, and the water hole grate 212 is used for filtering out sundries such as leaves and paper pieces in water.
In some embodiments, the sidewalk includes a first pavement layer, an aquifer 33 and a raw soil layer 13 arranged in sequence from top to bottom, wherein the aquifer 33 includes an aquifer 331 and a first impoundment filler filled in the aquifer 331. The gutter 331 is arranged along the extension of the first pavement. The cross-section of the gutter 331 may be any suitable shape, for example: and may be rectangular, trapezoidal, or any irregular shape suitable for construction. The cross-sectional area of the raceway 331 can be any suitable size, as can be determined by one skilled in the art.
In some embodiments, the green belt includes a second pavement layer disposed in sequence and a plurality of gutters 231 disposed below the second pavement layer, the gutters 231 being disposed between the gullies 14 and the gutter 331. The diversion trench can be arranged perpendicular to the water storage trench. One end of the gutter 231 is close to the gutter inlet, the other end of the gutter 231 is communicated with the water storage groove 331, and the bottom of the gutter 231 is higher than that of the water storage groove 331. In order to allow rainwater flowing through the first through-hole to more conveniently flow into the gutter, an end surface of the gutter 231 on a side close to the perforated curb 21 is disposed opposite to the first through-hole 211 of the perforated curb 21. Specifically, in some embodiments of the invention, the depth of the gutter 231 is about 60-80% of the depth of the gutter 331, for example: may be 70%. The gutter 231 may be of any suitable cross-section. In some embodiments, to facilitate the gutter 231 to be excavated, the gutter 231 has an inverted trapezoidal shape in cross section. The gutter 231 is filled with a second water-storing filler, which may be the same as the first water-storing filler.
In some embodiments, the gutter 331 and the gutter 14 are connected by a thin drain tube 24. The drain tubules 24 include a water inlet disposed in the water-retaining filler and a water outlet located in the rain well of the rain inlet 14. The distance between the water inlet and the bottom of the water storage channel 331 is larger than a preset distance threshold value. Specifically, in some embodiments, the inlet is spaced from the bottom of the raceway 331 by a distance of about 0.3 times the depth of the aquifer. In order to prevent the water inlet from being blocked by being buried by the silt, the water inlet of the fine drain pipe 24 is provided in the middle of the water storage filler. The internal diameter, length and distribution density of the fine drain pipes 24 can be reasonably selected by those skilled in the art, so that the flow rate of the fine drain pipes 24 can be controlled to avoid that the flow rate of the fine drain pipes 24 excessively increases the pressure of the municipal drainage system. In order to discharge the water in the gutter 331 to the gutter 14 slowly and reduce the load of the storm on the municipal rainwater pipe network, the inner diameter of the fine drain pipe 24 is usually not more than 25 mm.
In some embodiments, to increase the reservoir volume of the raceway 331, the first reservoir filler may be a porous material. The first impounded water filler can be construction waste recycled aggregate; on one hand, the building waste recycled aggregate water storage layer has larger porosity and larger water storage space; on the other hand, the recycling of the construction waste can reduce the environmental pollution caused by the construction waste. In particular, the first and/or second impounded fillers comprise at least one of crushed stone, tile fragments and waste concrete fragments.
In some embodiments, the pavement layer above the impoundment channel 331 comprises a permeable pavement material 31, a permeable mat 32 and an isolation layer 33 arranged in sequence from top to bottom, and the isolation layer 33 is located between the permeable mat 32 and the first impoundment filler. The permeable pavement material 31 can be permeable pavement bricks or other forms of permeable pavement materials with good water permeability and repairable. The water permeable mat 32 is a sand-like material such as: the material can be at least one of medium sand, stone dust slag, recycled fine aggregate and the like. Optionally, in some embodiments of the present invention, the permeable pad 32 may also include a suitable amount of cement. The isolation layer 33 may be made of an isolation material such as geotextile or a filter net to prevent sand-like filter material from falling into the aquifer.
In some embodiments, the gully 14 includes a gully, a wall of the gully is provided with a second through hole, and an end of the drainage tubule 24 close to the water outlet is provided in the second through hole on the wall of the gully. The water outlet end can be fixed in the second through hole by an adhesive. Optionally, the binder comprises cement or a polymeric binder.
In some embodiments, the second pavement layer is a discontinuous pavement enclosed by the green tree pools, curbs, and pedestrian pavements disposed between the green tree pools. Including permeable pavement materials and/or planting soil layers 26. An isolation layer 34 is arranged between the permeable pavement material and/or the planting soil layer 26 and the second water-storage filler.
In some embodiments, the aquifer fill near the first through hole 211 should be covered with a retaining shoe 22 to ensure that the water flow path behind the water flow hole is not blocked by planting soil. If the grain size of the second water storage filler is larger, a transition aggregate layer can be arranged above the second water storage filler, and the grain size of aggregate in the transition aggregate layer is 10-20 mm. The same water permeable bricks can be laid in the road surface area above the diversion trench, and the road surface area can also be made into a green belt. For example: the road surface between two tree ponds can set up the pavior brick, the height of the retaining filler of pavior brick below and pavement below retaining filler's surface are located the same degree of depth of below ground. In the area where plants are planted, the filling of the water storage filler needs to be properly reduced according to the thickness of the planting soil layer. When plants are planted, rainwater flows below the planting soil layer 26 and the isolation layer 34, the planting soil layer 26 is flat, long-term water accumulation and runoff scouring are avoided, and the planting soil layer is suitable for planting various plants. The scheme is easy to combine road drainage with green landscape, the sewage interception and discharge function is exerted in rainy season, and the characteristic of the typical road green landscape is still kept in dry season.
The working principle of the road drainage system provided by the embodiment of the invention is as follows: in case of rain, runoff generated on the roadway and flowing to the gutter 14 is blocked at the water blocking sill 15 and preferentially flows into the first through hole 211, and flows into the gutter 331 of the gutter 231 through the first through hole 211. The rainwater passes through the water passing hole grates 212 before flowing into the first through holes 211 to filter out larger impurities such as tree branches, leaves, plastic bags and the like. And most of the small impurities in the rainwater, such as garbage, silt, and the like, precipitate at the bottom of the gutter 231, so that the impurities of the rainwater flowing into the impoundment ditch 331 are greatly reduced. Rainwater of the green belt can also infiltrate into the gutter 231 and flow into the catch basin 331 through the gutter 231. Meanwhile, rainwater falling on the permeable pavement bricks of the sidewalk can permeate into the permeable cushion layer 32 below the permeable pavement bricks, flows into the water storage channel 331 after being filtered by the permeable cushion layer 32, and part of water entering the water storage channel 331 can slowly permeate into the ground to preserve underground water. The water level in the impoundment channel 331 will gradually increase along with the increase of the raining time or the rainfall, and when the water level in the impoundment channel 331 exceeds the water inlet of the drainage tubules 24, the rainwater in the impoundment channel 331 flows into the rainwater inlet 14 through the drainage tubules 24, thereby entering the municipal rainwater pipe network.
Referring to fig. 2, an embodiment of the present invention further provides a method for constructing a road, which is used to obtain the road water storage and drainage system provided in the foregoing embodiment, for example: the road water storage and drainage system in fig. 1 is obtained. The road for construction comprises a preset roadway, a green belt, a plurality of kerbs, a sidewalk and a plurality of rainwater openings, wherein the rainwater openings are formed in one side, close to the kerbs, of the roadway, and the roadway, the kerbs, the green belt and the sidewalk are sequentially arranged, and the method comprises the following steps:
s21, excavating a water storage ditch on the sidewalk, wherein the water storage ditch is arranged along the extending direction of the sidewalk;
in some embodiments, one skilled in the art may determine the size of the cross-sectional area of the raceway based on the precipitation at the construction site and the soil permeability coefficient to enable the operator to excavate the raceway over the sidewalk based on the size of the cross-sectional area of the raceway.
S22, excavating a gutter on the green belt between the gutter inlet and the water storage groove, wherein one end of the gutter is close to the gutter inlet, the other end of the gutter is communicated with the water storage groove, and the bottom of the gutter is higher than that of the water storage groove;
s23, filling a first water storage filler in the water storage ditch;
s24, paving fine drainage pipes at the bottom of the diversion trench so that water inlets and water outlets of all the fine drainage pipes are respectively positioned at the first water storage filler and the rainwater inlet;
in this embodiment, the technical staff can predict the displacement of the drainage tubules according to the rainfall and the soil permeability coefficient of the construction site, and calculate the length, the installation density, the inner diameter and other parameters of the drainage tubules according to the predicted displacement, so that the drainage tubules can drain the rainwater above the water inlet in the water storage ditch within the preset time. The preset time may be any suitable time, for example, 10h, 12h, 24h, and the like. In this embodiment, through the parameter of reasonable setting drainage tubule, can restrict the flow messenger of drainage tubule, the rainwater that makes the drainage tubule discharge can not cause pressure to municipal drainage system. Even to the lower area of soil osmotic coefficient, through the thickness that rational design aquifer packed, also can realize between twice torrential rain, with the water evacuation more than drainage tubule water inlet height in the aquifer, realize the flood storage to the secondary flood peak to realize that the rainwater purifies the back and slowly discharges, realize the management and control to the rainfall flood promptly.
S25, filling a second water storage filler in the gutter;
s26, mounting a water retaining bank on at least one side of the gutter inlet, wherein the water retaining bank and the porous curb with the first through hole are positioned on the same side of the gutter inlet, the water retaining bank is used for enabling the priority of rainwater on the roadway flowing through the first through hole to be higher than the priority of rainwater on the roadway flowing into the gutter inlet, and the first through hole is used for guiding the rainwater to flow into the diversion trench;
in some embodiments, the porous kerb may be a kerb that is previously provided with the first through-hole when the kerb is produced in a factory. In other embodiments, the porous curb may also be formed by opening a first through hole in a non-through hole curb preset on a road during overshoot of a constructor in road construction.
S27, paving a first pavement layer above the first water storage filler;
and S28, paving a second pavement layer above the second water storage filler.
The road construction method provided by the embodiment of the invention can be used for reconstructing the drainage system of the existing road on the basis of the existing road structure without dismantling and reconstructing the existing road, has relatively small construction amount and can greatly reduce the cost; meanwhile, the adjusting capacity and the sewage intercepting capacity of the road drainage system to rain flood can be greatly improved.
The embodiment of the invention provides a road drainage system and a road construction method, which can collect rainwater of sidewalks, green belts and roadways into a water storage ditch 331 when raining; when the water level in the catch basin 331 gradually rises and exceeds the height of the inlet of the fine drainage tube 24, the rainwater in the catch basin 331 can be gradually discharged into the rainwater port 14 through the fine drainage tube 24 to be discharged to the sewer through the rainwater port 14. Since the drain tubules 24 cannot drain the rainwater accumulated below the water inlet in the catch basin 331, the rainwater accumulated below the water inlet slowly infiltrates into the ground to contain the ground water. Therefore, the invention can greatly improve the water storage and drainage capacity of the road and is still suitable for areas with low soil permeability coefficient.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A road water storage and drainage system is used for water storage and drainage of a road and is characterized in that the road comprises a roadway, a curb, a green belt and a sidewalk which are sequentially arranged, wherein the curb comprises a porous curb, the porous curb is provided with a first through hole, the sidewalk comprises a first pavement layer, and the green belt comprises a second pavement layer;
the system comprises:
the water storage layer is arranged below the first pavement layer and comprises first water storage filler and a water storage groove arranged along the extending direction of the pavement, and the first water storage filler is filled in the water storage groove;
a plurality of gullies disposed at an edge of the roadway and proximate to the curb, the gullies including gullies;
the diversion trenches are arranged below the second road surface layer and between the rainwater openings and the water storage trenches, one ends of the diversion trenches are close to the rainwater openings, the other ends of the diversion trenches are communicated with the water storage trenches, and the trench bottoms of the diversion trenches are higher than the trench bottoms of the water storage trenches;
the second water storage filler is filled in the diversion trench;
the drainage tubule comprises a water inlet and a water outlet, the water inlet is arranged in the first water storage filler layer, the water outlet is arranged in the rainwater well, and the drainage tubule is used for discharging rainwater with the water level higher than the water inlet in the water storage ditch into the rainwater inlet;
the rainwater inlet is arranged on the side of the rainwater inlet, the rainwater inlet is arranged on the side of the rainwater inlet, the water retaining ridge is located between the first through hole and the rainwater inlet and used for enabling rainwater on the roadway to flow along the roadside, the priority of the first through hole is higher than that of the rainwater well, and the first through hole is used for guiding rainwater to flow into the diversion ditch.
2. The road impoundment and drainage system of claim 1 wherein the gutter is perpendicular to the impoundment gutter.
3. The road water storage and drainage system according to claim 1, wherein the rainwater well comprises a well wall, a second through hole is formed in one side, close to the water storage ditch, of the well wall, and one end, close to the water outlet, of the drainage tubule is located in the second through hole.
4. The roadway impounded water drainage system of claim 1 wherein the first and/or second impounded water filler comprises at least one of crushed stone, tile fragments and waste concrete fragments.
5. The water storage and drainage system for roads of any one of claims 1 to 4, wherein the first road surface layer comprises a permeable pavement material, a permeable cushion layer and a first isolation layer, which are arranged in this order from top to bottom.
6. The road impoundment and drainage system of claim 5 wherein the water permeable mat comprises at least one of medium sand, stone dust and regenerated fine bone.
7. A road storage and drainage system according to any of claims 1 to 4, wherein the second pavement layer comprises a green tree pool, a permeable pavement material and/or a planting soil layer.
8. The roadway impoundment and drainage system of claim 7, wherein the second roadway layer further comprises a second insulation layer;
when the second pavement layer comprises a permeable pavement material, the second isolation layer is positioned between the permeable pavement material and the second water-retaining filler;
when the second pavement layer comprises a planting soil layer, the second isolation layer is positioned between the planting soil layer and the second isolation layer.
9. A construction method of a road, wherein the road comprises a preset roadway, a green belt, a continuously laid kerbstone, a sidewalk and a plurality of rainwater openings, the rainwater openings are formed in one side, close to the preset kerbstone, of the roadway, the kerbstone, the green belt and the sidewalk are arranged in sequence, and the rainwater openings comprise rainwater wells, and the method comprises the following steps:
excavating a water storage ditch on the sidewalk, wherein the water storage ditch is arranged along the extending direction of the sidewalk;
a diversion trench is dug on a green belt between the rainwater inlet and the water storage trench, one end of the diversion trench is close to the rainwater inlet, the other end of the diversion trench is communicated with the water storage trench, and the trench bottom of the diversion trench is higher than the trench bottom of the water storage trench;
filling a first water storage filler in the water storage channel;
paving drainage tubules at the bottom of the diversion trench so that water inlets and water outlets of all the drainage tubules are respectively positioned in the first water storage filler and the rainwater well;
filling a second water storage filler in the gutter;
installing a water retaining bank on at least one side of the gutter inlet, wherein the water retaining bank and a porous curb provided with a first through hole are positioned on the same side of the gutter inlet, the water retaining bank is positioned between the first through hole and the gutter inlet and is used for enabling the priority of rainwater on the roadway to flow into the gutter inlet through the first through hole to be higher than the priority of rainwater on the roadway to flow into the gutter inlet, and the first through hole is used for guiding the rainwater to flow into the diversion trench;
paving a first pavement layer above the first water storage filler;
and laying a second pavement layer above the second water storage filler.
10. The method of constructing a roadway of claim 9, wherein said excavating a trench in said sidewalk comprises:
determining the size of the cross-sectional area of the water storage channel according to the rainfall and the soil permeability coefficient of a construction site;
and excavating the water storage ditch on the sidewalk according to the size of the cross section area.
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Application publication date: 20211026 |