CN204589747U - A kind of water permeability composite pavement structure completely - Google Patents

Abstract

The utility model discloses a completely water-permeable composite pavement structure, which comprises a surface layer, an adhesive layer, a grid layer, a base layer and a cushion layer which are sequentially arranged on the roadbed from top to bottom, and the surface layer is made of permeable asphalt concrete The formed permeable surface layer, the bonding layer is a permeable asphalt adhesive layer formed by asphalt, the grid layer is a glass fiber grid, the base layer is a permeable base layer formed of permeable cement concrete, and the cushion layer is made of graded crushed stone, graded The permeable granular cushion formed by mixing one or several kinds of gravel and graded crushed gravel. On the one hand, this fully permeable composite pavement structure has the advantages of no joints on the asphalt pavement, low driving vibration, low noise, and easy maintenance. It also has the advantages of high strength and long service life of the cement pavement; on the other hand, it also has the characteristics of water permeability and air permeability, which can quickly infiltrate and discharge rainwater into the ground, effectively maintain the urban ecological balance system, and reduce urban pollution when the rainfall is large. The burden of drainage facilities has positive significance.

Description

A fully permeable composite pavement structure

technical field

    The utility model relates to the technical field of road pavement structures, in particular to a completely water-permeable composite pavement structure.

Background technique

In urban construction, many cities use cement concrete and asphalt concrete to replace the original soil surface. For public places such as roads, sidewalks and non-motorized vehicles, they also like to use neat and beautiful stone plates or cement colored bricks. While improving traffic and road conditions and beautifying the environment, the closed surface also has significant adverse effects on urban ecology and climate.

Among them, the closed surface is gradually hardened and covered by water-blocking materials, making it difficult for water to infiltrate. Precipitation quickly becomes surface runoff and enters rivers or underground drainage pipes, thus forming an ecological "artificial desert".

The impermeable pavement caused by the closed surface lacks the ability to adjust the temperature and humidity of the urban surface, the rainwater evaporates quickly, the surface is easy to dry, and the dust pollution is heavy; after the rain, the water evaporates quickly and the air humidity is high, making people feel hot and unbearable, and then abnormal Dry, resulting in meteorological urban "heat island effect".

The impermeable pavement caused by the closed surface prevents the groundwater recharge path, coupled with the excessive extraction of urban groundwater, the urban groundwater table is getting lower and lower, causing land subsidence, and coastal areas can also lead to seawater backflow, resulting in a geological "funnel" "Water table.

The impermeable pavement caused by the closed surface also makes it difficult for the surface plants used to adjust the microclimate in the city to grow. Some trees even die and fall due to lack of water in the root system, thus losing their ecological functions.

Therefore, it is urgent to propose a pavement structure with good water permeability to increase the water-permeable and breathable space of the city, so as to achieve the good effect of adjusting the urban microclimate and maintaining ecological balance.

Utility model content

The technical problem to be solved by the utility model is to provide a completely water-permeable composite pavement structure with simple structure, water-permeable and air-permeable.

The technical solution adopted to solve the above technical problems: a fully permeable composite pavement structure, including the surface layer, adhesive layer, grid layer, base layer and cushion layer arranged sequentially on the roadbed from top to bottom. It is characterized in that: the surface layer is a permeable surface layer formed of permeable asphalt concrete, the adhesive layer is a permeable asphalt adhesive layer formed of asphalt, the grid layer is a glass fiber grid, and the base layer is a permeable asphalt layer. A permeable base formed of cement concrete, the cushion is a permeable granular material cushion formed by one or more mixtures of graded gravel, graded gravel and graded crushed gravel.

Further, the permeable asphalt sticky layer is uniformly and discontinuously sprinkled on the permeable base layer in the form of dots, and the sprinkling area of the permeable asphalt sticky layer accounts for 30% to 50% of the road surface area.

Further, the mesh shape of the glass fiber grid is rectangular, the mesh size is 0.5-1.5cm, the ultimate tensile strength is not less than 60kN/m, and the tensile elongation is not more than 3%.

Further, the thickness of the water-permeable surface layer is 2-6 cm.

Further, the thickness of the water-permeable surface layer is 4cm.

Further, the thickness of the permeable base layer is 15-30 cm.

Further, the thickness of the permeable base layer is 20cm.

Further, the thickness of the permeable granular cushion layer is 10-30 cm.

Further, the thickness of the permeable granular cushion layer is 15-20 cm.

Further, a drainage blind ditch is formed on the lower side of the permeable granular material cushion, and a drainage hose is laid in the blind ditch.

Beneficial effects: the fully permeable composite pavement structure adopts a three-layer fully permeable composite pavement structure of a water-permeable surface layer, a water-permeable base layer and a water-permeable granular cushion layer, and an adhesive layer and a grid layer are arranged between the water-permeable surface layer and the water-permeable base layer In order to strengthen the connection between the permeable surface layer and the permeable base and prevent cracks, the pavement structure has the advantages of no joints on the asphalt pavement, low driving vibration, low noise, and easy maintenance. It also has the advantages of high strength and long service life of the cement pavement. Advantages; on the other hand, it also has the characteristics of water permeability and air permeability, which can quickly infiltrate rainwater into the ground, effectively maintain the urban ecological balance system, and reduce the burden of urban drainage facilities when the rainfall is large, and prevent urban waterlogging. Alleviating the urban heat island effect is of positive significance.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further;

Fig. 1 is the utility model embodiment pavement structure schematic diagram;

Fig. 2 is a schematic diagram of the side road surface structure of the embodiment of the utility model.

Detailed ways

Referring to Fig. 1 and Fig. 2, the utility model is a completely water-permeable composite pavement structure, which includes a surface layer, an adhesive layer, a grid layer, a base layer and a cushion layer arranged on the roadbed from top to bottom, and the surface layer It is a permeable surface layer 1 formed of permeable asphalt concrete, the adhesive layer is a permeable asphalt adhesive layer 2 formed of asphalt, the grid layer is a glass fiber grid 3, and the base layer is a permeable base layer 4 formed of permeable cement concrete. It is a permeable granular material cushion layer 5 formed by one or more mixtures of graded gravel, graded gravel and graded crushed gravel.

In this embodiment, the surface layer is made of permeable asphalt concrete to form the permeable surface layer 1. In addition to the advantages of the traditional asphalt concrete pavement, the permeable surface layer 1 has the advantages of smooth surface without joints, small driving vibration, low noise, fast open traffic, and easy maintenance. And other advantages, it can also be breathable and water permeable. The permeable asphalt adhesive layer 2 is improved on the basis of the traditional asphalt adhesive layer. Specifically, the permeable asphalt adhesive layer 2 is uniformly sprinkled on the permeable base layer 4 in a point-like discontinuous manner. The permeable asphalt adhesive layer 2 has a reinforced water-permeable surface layer 1 The effect of cohesion with the permeable base layer 4, because the permeable asphalt adhesive layer 2 is sprinkled in dots, it also has the effect of water permeability. The grid layer is formed by using glass fiber grid 3, which can reduce and delay the reflection crack effect of the permeable base layer 4 on the permeable surface layer 1. The base layer is made of permeable cement concrete to form the permeable base layer 4. In addition to the advantages of the traditional cement concrete pavement, the permeable base layer 4 can also be air-permeable and water-permeable. The cushion layer is a permeable granular material cushion layer 5, which is formed of water-permeable materials such as graded gravel, graded gravel, and graded crushed gravel, so as to avoid water accumulation under the road surface.

On the one hand, the composite pavement structure has the advantages of seamless asphalt pavement, low driving vibration, low noise, and easy maintenance, and also has the advantages of high strength and long service life of the cement pavement; on the other hand, it also has the characteristics of water permeability and air permeability, which can be Let the rainwater infiltrate and drain into the ground, effectively maintaining the urban ecological balance system.

Wherein, the thickness of the water-permeable surface layer 1 should be 2-6 cm, preferably 4 cm. The sprinkling area of the permeable asphalt sticky layer 2 accounts for 30% to 50% of the road surface area, preferably 40%. The mesh shape of the glass fiber grid 3 is rectangular, the mesh size is 0.5~1.5cm, the ultimate tensile strength is not less than 60kN/m, and the tensile elongation is not more than 3%. The thickness of the permeable base layer 4 should be 15-30cm, preferably 20cm. The thickness of the permeable granular cushion layer 5 should be 10-30 cm, preferably 15-20 cm.

A drainage blind ditch 6 is formed on the lower side of the permeable granular material cushion layer 5, and the material of the drainage blind ditch 6 can be consistent with the permeable granular material cushion layer 5, that is, graded crushed stone, graded gravel, and graded crushed stone can be used. Gravel and other permeable materials, the suitable size of drainage blind ditch 6 is 30*30cm, the specific size can be determined according to the water catchment of road width, and drainage hose 7 should also be laid in drainage blind ditch 6, and the size of drainage hose 7 should not be less than 10cm , the suitable size is 15cm, which can be calculated and determined according to the water catchment of the road width. The water inside the pavement structure can be removed to the rainwater well of the road as soon as possible through the drainage hose 7, and then enter the municipal drainage system or the drainage ditch at the side of the roadbed.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments. Various changes are made.

Claims (10)

1. A fully water-permeable composite pavement structure, comprising a surface layer, an adhesive layer, a grid layer, a base layer and a cushion layer arranged sequentially from top to bottom on the roadbed, it is characterized in that: the surface layer is composed of The permeable surface layer formed by permeable asphalt concrete, the adhesive layer is a permeable asphalt adhesive layer formed by asphalt, the grid layer is a glass fiber grid, and the base layer is a permeable base layer formed by permeable cement concrete. The cushion is a permeable granular cushion. 2. The fully water-permeable composite pavement structure according to claim 1, characterized in that: the permeable asphalt sticky layer is evenly sprinkled on the permeable base layer in a point-like discontinuous manner, and the sprinkling area of the permeable asphalt sticky layer It accounts for 30%~50% of the road surface area. 3. The fully water-permeable composite pavement structure according to claim 1, characterized in that: the mesh shape of the glass fiber grid is rectangular, the mesh size is 0.5~1.5cm, and the ultimate tensile strength is not less than 60kN /m, the tensile elongation is not more than 3%. 4. The fully water-permeable composite pavement structure according to claim 1, characterized in that: the thickness of the water-permeable surface layer is 2-6 cm. 5. The fully water-permeable composite pavement structure according to claim 4, characterized in that: the thickness of the water-permeable surface layer is 4 cm. 6. The fully permeable composite pavement structure according to claim 1, characterized in that: the thickness of the permeable base is 15-30 cm. 7. The fully water-permeable composite pavement structure according to claim 6, characterized in that: the thickness of the water-permeable base layer is 20 cm. 8. The fully water-permeable composite pavement structure according to claim 1, characterized in that: the thickness of the water-permeable granular material cushion is 10-30cm. 9. The fully water-permeable composite pavement structure according to claim 8, characterized in that: the thickness of the water-permeable granular cushion is 15-20cm. 10. The fully water-permeable composite pavement structure according to claim 1, characterized in that: a drainage blind ditch is formed on the lower side of the permeable granular material cushion, and a drainage hose is laid in the blind ditch.