Road drainage system in pluvial area

Abstract

The utility model discloses a road drainage system in a pluvial area. With the acceleration of the urbanization process, the urban inland inundation problem in a rainy region is increasingly serious. Curbs are arranged between the sidewalk and the roadway, a plurality of biological retention belts are arranged on the sidewalk and located on one side of the roadway at intervals, each retention belt comprises two ecological tree pools, and a concave green land is arranged between the ecological tree pools; one part of rainwater on the roadway is discharged into a municipal rainwater pipe network through a gutter type rainwater opening, and the other part of rainwater is converged into a bioretention zone through a kerb opening; rainwater collected in the ecological tree pool and the concave greenbelt passes through the rainwater overflow well and is finally connected into a municipal rainwater pipe network; rainwater on the sidewalk infiltrates downwards through the CT granite permeable plate and is guided to the rainwater overflow well through the perforated blind pipe in the graded broken stone layer. According to the utility model, natural accumulation, natural permeation and natural purification of rainwater are realized, so that the urban inland inundation problem is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of urban road construction, and in particular relates to a road drainage system in rainy areas. Background Art

[0002] With the acceleration of urbanization, urban waterlogging in rainy areas is becoming increasingly serious. The existing road drainage system cannot meet the drainage needs of modern cities, resulting in frequent urban waterlogging, affecting the normal operation of the city and the quality of life of residents. Therefore, designing a new road drainage system that is suitable for rainy areas is of great significance to solving the problem of urban waterlogging. Utility Model Content

[0003] In order to make up for the deficiencies of the prior art, the utility model provides a road drainage system for rainy areas, which realizes the natural accumulation, natural infiltration and natural purification of rainwater, thereby alleviating the problem of urban waterlogging and improving the urban ecological environment.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A road drainage system for rainy areas, characterized by comprising a sidewalk and a roadway, a curbstone is arranged between the sidewalk and the roadway, and a plurality of openings are arranged at intervals on the curbstone;

[0006] The sidewalk is located on one side of the roadway, and a plurality of bioretention zones are arranged at intervals. The bioretention zones are arranged along the length of the road, and the surface of the bioretention zones is lower than the road surface height; the bioretention zones include two ecological tree pools, and a sunken green space is arranged between the two ecological tree pools;

[0007] The sidewalk adopts a CT permeable paving structure, which is composed of a CT granite permeable board, a medium sand layer, a permeable concrete layer, and a graded crushed stone layer from top to bottom; an open blind pipe is arranged in the graded crushed stone layer;

[0008] Green plants are planted inside the ecological tree pool, and pebbles or permeable concrete are laid on the surface. The middle part is filled with planting soil, and a transition layer of 100mm thick gravel sand or coarse sand is laid at the bottom. Perforated blind pipes are laid in the transition layer; the perforated blind pipes collect infiltrated rainwater and divert it to the rainwater overflow well, and finally connect to the municipal rainwater pipe network;

[0009] An overflow rainwater inlet is provided in the sunken green space, and a rainwater grate is provided on the top of the overflow rainwater inlet;

[0010] The structure of the sunken green space from top to bottom is a 200mm thick grass retention layer, a 600mm thick infiltration layer, a 100mm thick medium-coarse sand filtration layer, and a 300mm thick gravel drainage layer.

[0011] Furthermore, a side ditch type rainwater outlet is arranged on the outer side of the carriageway, and the side ditch type rainwater outlet is connected to the municipal rainwater pipe.

[0012] Furthermore, rainwater collection pipes are arranged on both sides of the road, and the rainwater collection pipes are connected to the rainwater collection pool.

[0013] Furthermore, filtering facilities are provided in the rainwater collection pool.

[0014] Furthermore, below the ground, water-permeable porous bricks are installed at the junction of the sidewalk and the roadway, the junction of the sidewalk and the bioretention zone, and the junction of the roadway and the bioretention zone.

[0015] Furthermore, water-permeable porous bricks are set at the junction of the ecological tree pool and the sunken green space, and permeable geotextile is set between the planting soil and the water-permeable porous bricks.

[0016] Furthermore, pebbles are arranged at the position of the rain grate.

[0017] Furthermore, the carriageway structure from top to bottom is: 4 cm thick AC-13C asphalt concrete layer, 8 cm thick AC-25C asphalt concrete layer, asphalt bottom seal layer, 17 cm thick cement stabilized gravel layer, 20 cm thick 10% lime soil layer.

[0018] Beneficial effects of the utility model:

[0019] 1) The utility model realizes the natural accumulation, natural infiltration and natural purification of rainwater, thereby alleviating the problem of urban waterlogging and improving the urban ecological environment;

[0020] 2) The utility model sidewalk adopts CT permeable paving structure to ensure that rainwater can quickly penetrate into the ground;

[0021] 3) The utility model sets rainwater collection pipes on both sides of the road, and the rainwater collection pipes are connected to the rainwater collection pool. The treated rainwater can be transported to the greening irrigation system, road cleaning system, etc. through the pipes to achieve the recycling of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The floor plan of the utility model;

[0023] Figure 2 for Figure 1 1-1 sectional view in;

[0024] Figure 3 for Figure 1 Sectional view 2-2 in FIG.

[0025] Figure 4 This is a schematic diagram of the sidewalk structure;

[0026] Figure 5 This is the plan view of the overflow stormwater inlet;

[0027] Figure 6 for Figure 5 1-1 sectional view in;

[0028] Figure 7 for Figure 5 Sectional view 2-2 in FIG.

[0029] Figure 8 This is a schematic diagram of the rain grate structure. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with specific implementation methods.

[0031] The utility model comprises a sidewalk and a roadway, a curbstone is arranged between the sidewalk and the roadway, and a plurality of openings are arranged at intervals on the curbstone; a plurality of bioretention belts are arranged at intervals on the sidewalk located on one side of the roadway, the bioretention belts are arranged along the length direction of the road, and the surface of the bioretention belts is lower than the road surface height; the bioretention belts comprise two ecological tree pools, and a sunken green space is arranged between the two ecological tree pools, and rainwater is naturally purified and retained by plants and soil; at the same time, the ecological function of the green belt is improved by rationally arranging vegetation; such as Figure 1 , 2 , as shown in 3;

[0032] The sidewalk adopts CT permeable pavement structure to ensure that rainwater can quickly penetrate into the ground; the CT permeable pavement structure is composed of CT granite permeable board, medium sand layer, permeable concrete layer, and graded crushed stone layer from top to bottom; open blind pipes are set in the graded crushed stone layer; Figure 4 As shown;

[0033] In this embodiment, the total thickness of the CT permeable pavement structure is 34cm, specifically 6cm CT granite permeable board, 3cm medium sand, 15cm C20 permeable concrete, 10cm graded crushed stone, and the original soil base is below the graded crushed stone; the specifications of the CT granite permeable board are 20cm×40cm×6cm, the flexural strength is not less than Cf4.0, the anti-slip grade is R3, the corresponding anti-slip performance index BPN≥60, the single block mass loss rate is ≤5%, the permeability coefficient of the CT granite permeable board is ≥1.0×10-2cm / s, and the wear resistance should not be greater than 35mm. The appearance size and material of the road bricks are design suggestions. The appearance size and material requirements during construction should be approved by the construction unit. The gap width between the sidewalk bricks should be no more than 5mm. After paving, fine sand should be used to fill it and remove the excess fine sand on the surface.

[0034] The soil surface of the ecological tree pool is lower than the road surface and is a potential water collection device for collecting and filtering initial rainwater. Green plants are planted inside the ecological tree pool, and pebbles or permeable concrete are laid on the surface. The middle part is filled with planting soil, and a transition layer of 100mm thick gravel sand or coarse sand is laid at the bottom. Perforated blind pipes are laid in the transition layer to collect infiltrated rainwater and divert it to the rainwater overflow well, and finally connected to the municipal rainwater pipe network.

[0035] like Figure 5 , 6 As shown in Figures 7 and 8, an overflow type rainwater inlet is provided in the sunken green space, a rainwater grate is provided on the top of the overflow type rainwater inlet, and pebbles are provided at the position of the rainwater grate; the structure of the sunken green space from top to bottom is a 200mm thick grass retention layer, a 600mm thick infiltration layer, a 100mm thick medium-coarse sand filtration layer, and a 300mm thick gravel drainage layer. The overflow type rainwater inlet is a facility used to control the flow of rainwater. The rainwater grate of the overflow type rainwater inlet is not less than 5cm below the lowest edge of the road surface and not less than 15cm above the ground of the ecological tree pool. When the rainwater exceeds the storage depth, the overflow type rainwater inlet will discharge the excess rainwater into the rainwater pipe or box culvert;

[0036] Below the ground, water-permeable porous bricks are installed at the junctions of the sidewalk and the roadway, the sidewalk and the bioretention zone, and the roadway and the bioretention zone. Water-permeable porous bricks are installed at the junction of the ecological tree pool and the sunken green space, and permeable geotextiles are installed between the planting soil and the water-permeable porous bricks;

[0037] The structure of the carriageway from top to bottom is: 4cm thick AC-13C asphalt concrete layer, 8cm thick AC-25C asphalt concrete layer, asphalt bottom seal layer, 17cm thick cement stabilized gravel layer, and 20cm thick 10% lime soil layer.

[0038] A ditch-type stormwater inlet is set on the outer side of the carriageway and connected to the municipal stormwater pipe. When heavy rainfall occurs, saturated rainwater is discharged from the ditch-type stormwater inlet into the stormwater pipe network to reduce road surface water accumulation.

[0039] Rainwater collection pipes are set up on both sides of the road, and the rainwater collection pipes are connected to the rainwater collection pool. Filtration facilities are set up in the rainwater collection pool. Such as gravel and sand, the rainwater is initially filtered and purified. The treated rainwater can be transported to the greening irrigation system, road cleaning system, etc. through pipes to achieve the recycling of water resources.

[0040] The working principle of the utility model is as follows:

[0041] Part of the rainwater on the road surface is discharged into the municipal rainwater pipe network through the ditch-type rainwater outlet, and part of it is collected into the bioretention zone through the openings in the curbstone; the rainwater collected in the ecological tree pool is diverted to the rainwater overflow well through the perforated blind pipes laid in the transition layer, and finally connected to the municipal rainwater pipe network; the rainwater on the sidewalk infiltrates through the CT granite permeable board and is diverted to the rainwater overflow well through the perforated blind pipes in the graded gravel layer; when the rainwater accumulated in the sunken green space exceeds the storage depth, the excess rainwater is discharged to the rainwater pipe through the overflow rainwater outlet;

[0042] The rainwater collection pipes installed on both sides of the road can introduce part of the rainwater into the rainwater collection pool. The treated rainwater can be transported through pipes to the greening irrigation system, road cleaning system, etc., to achieve the recycling of water resources.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The content of the utility model is not limited to the examples listed, and any equivalent changes made to the technical solution of the utility model by ordinary technicians in this field after reading the specification of the utility model are covered by the claims of the utility model.

Claims

1. A road drainage system for rainy areas, characterized by: It includes a sidewalk and a roadway, a curbstone is arranged between the sidewalk and the roadway, and a plurality of openings are arranged at intervals on the curbstone; The sidewalk is located on one side of the roadway, and a plurality of bioretention zones are arranged at intervals. The bioretention zones are arranged along the length of the road, and the surface of the bioretention zones is lower than the road surface height; the bioretention zones include two ecological tree pools, and a sunken green space is arranged between the two ecological tree pools; The sidewalk adopts a CT permeable paving structure, which is composed of a CT granite permeable board, a medium sand layer, a permeable concrete layer, and a graded crushed stone layer from top to bottom; an open blind pipe is arranged in the graded crushed stone layer; Green plants are planted inside the ecological tree pool, and pebbles or permeable concrete are laid on the surface. The middle part is filled with planting soil, and a transition layer of 100mm thick gravel sand or coarse sand is laid at the bottom. Perforated blind pipes are laid in the transition layer; the perforated blind pipes collect infiltrated rainwater and divert it to the rainwater overflow well, and finally connect to the municipal rainwater pipe network; An overflow rainwater inlet is provided in the sunken green space, and a rainwater grate is provided on the top of the overflow rainwater inlet; The structure of the sunken green space from top to bottom is a 200mm thick grass retention layer, a 600mm thick infiltration layer, a 100mm thick medium-coarse sand filtration layer, and a 300mm thick gravel drainage layer.

2. A road drainage system for rainy areas according to claim 1, characterized in that: A side ditch type rainwater inlet is arranged outside the carriageway, and the side ditch type rainwater inlet is connected to a municipal rainwater pipe.

3. A road drainage system for rainy areas according to claim 2, characterized in that: Rainwater collection pipes are set up on both sides of the road and connected to rainwater collection pools.

4. A road drainage system for rainy areas according to claim 3, characterized in that: A filtering facility is arranged in the rainwater collection pool.

5. A road drainage system for rainy areas according to claim 4, characterized in that: Below the ground, water-permeable porous bricks are installed at the junctions of the sidewalk and the roadway, the junction of the sidewalk and the bioretention zone, and the junction of the roadway and the bioretention zone.

6. A road drainage system for rainy areas according to claim 5, characterized in that: Water-permeable porous bricks are set at the junction of the ecological tree pool and the sunken green space, and permeable geotextile is set between the planting soil and the water-permeable porous bricks.

7. A road drainage system for rainy areas according to claim 6, characterized in that: Pebbles are set at the location of rainwater grates.

8. A road drainage system for rainy areas according to claim 7, characterized in that: The structure of the carriageway from top to bottom is: 4cm thick AC-13C asphalt concrete layer, 8cm thick AC-25C asphalt concrete layer, asphalt bottom seal layer, 17cm thick cement stabilized gravel layer, and 20cm thick 10% lime soil layer.

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