CN209099100U - Pervious concrete pavement structure suitable for application in areas with high water table - Google Patents

Abstract

The utility model discloses a permeable concrete pavement structure suitable for application in areas with high groundwater level, which is characterized by comprising a permeable concrete layer, a crushed stone layer is arranged under the permeable concrete layer, and an anti-permeability layer is arranged under the crushed stone layer, The anti-penetration layer is wave-shaped, and the anti-penetration layer is provided with a perforated drainage pipe at the wave valley. Since the improved pavement structure has an impermeable layer, it can effectively avoid the infiltration of rainwater runoff into groundwater or the infiltration of groundwater into the facility, thereby avoiding the risk of polluting the groundwater.

Description

Pervious concrete pavement structure suitable for application in areas with high water table

technical field

The utility model relates to a pavement pavement structure, in particular to a permeable pavement structure applied to urban roads, parks, schools and squares.

Background technique

At present, two types of pavement structures are widely used in residential roads and parking lots. One is dense and impermeable concrete pavement. , without the ability to reduce the runoff peak, the rainfall will quickly gather on the surface of the pavement to generate ground runoff, which will cause greater drainage pressure on the urban drainage pipe network system, and is prone to the risk of waterlogging; another kind of pavement uses permeable concrete pavement, which This kind of structure can absorb a certain amount of rainfall, and has a certain ability to regulate, store and reduce flood peaks, but there is no impermeable structure at the bottom, and the rainfall directly infiltrates into the groundwater, which has the risk of polluting groundwater resources. In groundwater table areas, groundwater can easily seep into the pavement structure, which reduces the storage capacity of the pavement and risks cross-contamination with groundwater.

Utility model content

The technical problem to be solved by the utility model is to solve the above-mentioned deficiencies of the prior art, and to provide a permeable concrete pavement structure suitable for application in areas with high groundwater levels.

In order to solve the above-mentioned technical problems, the present utility adopts the following technical scheme: a permeable concrete pavement structure suitable for application in high groundwater level areas, characterized in that it comprises a permeable concrete layer, and a gravel layer is arranged below the permeable concrete layer, and the An impermeable layer is arranged under the stone layer, the impermeable layer is in a wave shape, and the impermeable layer is provided with a perforated drainage pipe at the wave valley.

Further, a layer of filter cotton is also provided on the outer peripheral surface of the drain pipe.

Further, the impermeable geotextile is used for the impermeable layer.

Further, the crushed stone layer includes a fine crushed stone layer with a crushed stone particle size of less than 15 mm and a coarse crushed stone layer with a particle size of 20 to 40 mm, wherein the fine crushed stone layer is located above the coarse crushed stone layer, and the height of the fine crushed stone layer is 150mm. , the thickness of the coarse gravel layer is 300mm.

Further, the permeable concrete is a three-layer structure, which is a surface layer, an intermediate layer and a base layer in sequence from top to bottom; the thickness of the surface layer is 1cm-2cm, and the interior is provided with continuous pores; the thickness of the intermediate layer is 5cm-15cm, The porosity is 20%-40%, the diameter of the permeable holes is 0.1mm-1.5mm; the porosity of the base layer is 20%-40%, the pore diameter is 1-3mm, and the thickness is 15cm.

It can be seen from the above technical solutions that the utility model has the following advantages: the improved pavement structure has an impermeable layer, so it can effectively prevent rainwater runoff from infiltrating groundwater or groundwater infiltrating into facilities, avoiding the risk of polluting groundwater.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1, the permeable concrete pavement structure suitable for application in high groundwater level areas of the present invention comprises a permeable concrete layer, a gravel layer is arranged below the permeable concrete layer, and an anti-permeability layer 3 is arranged below the gravel layer, The impermeable layer 3 is made of impermeable geotextile. The anti-penetration layer 3 is in a wave shape, and the anti-penetration layer is provided with a perforated drainage pipe 1 at the trough of the wave. A layer of filter cotton 2 is also provided on the outer peripheral surface of the perforated drainage pipe. Filter cotton can prevent impurities such as sand and gravel from entering the perforated drain with the water flow, thereby blocking it. The reverse osmosis layer 3 can be made of impermeable geotextile. Since the improved pavement structure has an impermeable layer, it can effectively avoid the infiltration of rainwater runoff into groundwater or the infiltration of groundwater into the facility, thereby avoiding the risk of polluting the groundwater.

Wherein, the crushed stone layer includes a fine crushed stone layer 5 with a crushed stone particle size of less than 15 mm and a coarse crushed stone layer 4 with a particle size of 20 to 40 mm, wherein the fine crushed stone layer is located above the coarse crushed stone layer, and the height of the fine crushed stone layer is 150mm, and the thickness of the coarse gravel layer is 300mm.

In order to prevent the permeable concrete from being blocked, the following structure is adopted. The permeable concrete is a three-layer structure, and from top to bottom are the surface layer 8, the middle layer 7 and the base layer 6; the thickness of the surface layer is 1cm-2cm, and the interior is provided with continuous The thickness of the intermediate layer is 5cm-15cm, the porosity is 20%-40%, and the pore size of the permeable pores is 0.1mm-1.5mm; the porosity of the base layer is 20%-40%, the pore size is 1-3mm, and the thickness is 15cm. Different types of permeable concrete with different porosity and different void sizes are used to lay the permeable concrete floor in layers, so that other impurities such as sand, gravel, organic matter and other impurities that come with the water flow are blocked on the surface layer, making it difficult for them to enter the lower layer and ensuring the internal voids of the permeable concrete. unobstructed. When the porosity of the surface permeable concrete is reduced to a certain extent, the impurities in the surface permeable concrete can be removed by high-pressure water flushing and vacuum suction, so as to keep the porosity of the pervious concrete relatively unchanged and ensure the overall water permeability of the permeable concrete. .

Compared with the ordinary impervious concrete structure, the improved pavement structure has a certain effect of controlling the total amount of runoff. Because the effluent has the effect of peak clipping and delaying the runoff compared with the ordinary impermeable pavement, it can improve the amount of water that cannot be absorbed on the spot. Effects of site hydrological performance. According to the statistics of the rainfall events that occurred in 2016, compared with the traditional impervious concrete pavement, the total annual runoff control rate of the structure in 2016 was 24.2%, and the rainfall that the structure can directly control is about 5.2mm. That is, compared with the impervious concrete pavement, the structure can reduce the surface runoff by 24.2% in one year of operation. For the rainfall below 5.2mm, the structure can completely stagnate without outflow.

Claims (5)

1. a kind of pervious concrete paving structure for being suitably applied groundwater level region, it is characterised in that: including permeable mixed Solidifying soil layer, pervious concrete layer lower section are provided with metalling, and impermeable layer is provided with below metalling, and the impermeable layer is in wave Shape wave, and impermeable layer is provided with perforated drain pipe at trough.

2. the pervious concrete paving structure according to claim 1 for being suitably applied groundwater level region, feature Be: the perforated drain pipe outer peripheral surface is additionally provided with one layer of filter cotton.

3. the pervious concrete paving structure according to claim 1 for being suitably applied groundwater level region, feature Be: the impermeable layer uses waterproof geotextiles.

4. the pervious concrete paving structure according to claim 1 for being suitably applied groundwater level region, feature It is: the coarse crushing rock layers that metalling includes fine crushing rock layers of the ballast grain sizes less than 15mm and partial size is 20~40mm, wherein fine crushing Rock layers are located above coarse crushing rock layers, and fine stone layer height is 150mm, and coarse crushing rock layers are with a thickness of 300mm.

5. the pervious concrete paving structure according to claim 1 for being suitably applied groundwater level region, feature Be: the pervious concrete is three-decker, is followed successively by surface layer, middle layer and base from top to bottom；Surface layer with a thickness of 1cm-2cm, and it is internal equipped with continuous hole；Middle layer with a thickness of 5cm-15cm, voidage 20%-40%, permeable hole Aperture be 0.1mm-1.5mm；Base's voidage is 20%-40%, and gap aperture is in 1-3mm, with a thickness of 15cm.