CN209443316U - A kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is set - Google Patents

Abstract

The utility model relates to a permeable paving brick pavement structure provided with a dense asphalt macadam concrete layer, which successively comprises a permeable paving brick surface layer, a coarse sand leveling layer, a dense asphalt macadam concrete layer and a graded macadam layer from top to bottom. The graded crushed stone layer is flatly laid on the soil foundation, and the dense asphalt crushed stone concrete layer is provided with uniformly arranged drill holes. Compared with the prior art, the utility model has a reasonable design and a simple structure. By setting a dense asphalt macadam concrete layer, it can be used as a temporary construction work surface during construction to ensure that the water permeability of the permeable brick layer of the surface layer is not affected; During construction, through holes can also be drilled to facilitate infiltration of rainwater; the overall structure takes into account the requirements of strength, water permeability and construction technology.

Description

A permeable brick pavement structure with dense asphalt macadam concrete layer

technical field

The utility model relates to the technical field of pavement structures, in particular to a permeable brick-paved pavement structure provided with a dense asphalt macadam concrete layer.

Background technique

With the popularity of sponge cities, people's awareness of permeable pavement is getting stronger and stronger. As an effective sponge facility, permeable brick pavement is mostly used for roads without motor vehicle loads such as sidewalks, pedestrian streets, and garden roads, as well as roads, squares, parking lots and other areas with light load requirements. The traditional permeable brick pavement structure is mostly a layered structure of surface layer, (leveling layer), crushed stone base, and undisturbed soil base. The function of the surface layer is to infiltrate rainwater, the function of the gravel base is to store water, and the undisturbed soil base is convenient for drainage ; Although it meets the needs of water permeability, it is rarely used in medium and heavy-duty roads due to the weakness of the graded gravel base in the road structure. Very few permeable brick pavements are used in medium and heavy-duty areas, often because too much attention is paid to the improvement of mechanical bearing capacity, resulting in a decrease in its own water permeability. Once there is a heavy rain, it is easy to accumulate water and affect pedestrians and traffic. In addition, the construction technology of permeable pavement at this stage is simple, and the surface layer is often blocked by gravel dust during construction, and the water permeability is significantly reduced. These problems affect the application of this technology to a certain extent.

Utility model content

The purpose of this utility model is to provide a permeable brick pavement structure with good strength and good water permeability to provide a dense asphalt macadam concrete layer in order to overcome the defects of the above-mentioned prior art.

The purpose of this utility model can be achieved through the following technical solutions: a permeable paving brick pavement structure with a dense asphalt macadam concrete layer. An asphalt macadam concrete layer and a graded macadam layer, the graded macadam layer is flatly laid on the soil foundation, and the dense asphalt macadam concrete layer is provided with uniformly arranged drill holes.

The utility model patent sets up a dense asphalt macadam concrete layer. On the one hand, due to its high strength and modulus, it can effectively share more loads, reduce the load capacity and corresponding deformation of the weak gravel layer, and the stiffness of the asphalt macadam concrete layer It is relatively low, which can avoid reflection cracks from bottom to top and affect the use of the road surface; on the other hand, it provides a relatively flat plane for the upper structure, which is convenient for construction. In addition, the permeable brick pavement structure also provides a feasible, low-cost, and simple construction reconstruction plan for changing densely-graded asphalt pavement into permeable pavement.

Preferably, the dense asphalt macadam concrete layer is densely graded asphalt concrete, AC or ATB is selected according to needs during construction, the maximum nominal particle size is less than 20mm, and the scattering property is poor when the particle size is too large; it can be used as a road vehicle during construction Temporary pavement material layer, in order to prevent construction vehicles and pavement dust from clogging the permeable "channel" on the surface of the permeable pavement structure, its thickness is in the range of 15 to 20cm according to the total traffic volume during construction; Drill through small holes for water penetration. The diameter of the holes is 2 to 3 cm. Due to the relatively large deformation of the asphalt flexible base, it is not suitable to add gravel in the holes, and the large hole diameter will affect the bearing capacity of the layer; the distance between the holes and the distance between the holes The distance is not less than 3 times the aperture, and it can be designed according to the local rainfall conditions. If the distance is small, damage such as through cracks will occur.

Preferably, the graded gravel layer has a thickness in the range of 20 to 40 cm, a porosity of 35 to 50%, and a particle size of 2 to 5 cm.

Preferably, the soil foundation is a plain soil compaction layer, and the soil foundation compaction degree of the plain soil compaction layer is about 90% to 95%.

Preferably, the leveling layer is a coarse sand layer, the thickness of the coarse sand layer is in the range of 2 to 3 cm and the grain size of the gravel is in the range of 0.5 to 1 cm.

Preferably, the paving pavement includes a plurality of high-strength paving bricks spliced with each other, there is a 1 to 2 cm permeable gap between two adjacent high-strength paving bricks, and the compressive strength of the high-strength paving bricks is greater than or equal to 50 MPa And the flexural strength is not less than 5Mpa.

Preferably, the splicing pattern of paving bricks can be divided into three types according to the difference in structural performance, herringbone pattern, mosaic pattern and brick laying pattern, more preferably herringbone pattern.

Compared with the prior art, the beneficial effect of the utility model is embodied in that the permeable brick pavement structure has a reasonable design and a simple structure. By setting a dense asphalt macadam concrete layer, the bearing capacity of the pavement is significantly improved, and at the same time, it is used as a temporary pavement material layer for road vehicles to pass through during construction, so as to prevent construction vehicles and road dust from blocking the permeable "channel" on the surface of the permeable pavement structure; and When the surface material layer is finally laid, holes can be drilled on it to allow the infiltrated rainwater to continue to infiltrate, ensuring sufficient rainwater penetration capacity, no water accumulation on the road surface, and smooth discharge to the road below the road and the surrounding green space.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the pore size distribution diagram of the compact asphalt macadam concrete layer of the present invention;

Fig. 3 is the schematic diagram of the pavement form of the permeable brick surface layer in embodiment 1;

Fig. 4 is the pavement form schematic diagram of mosaic pattern;

Fig. 5 is a schematic diagram of the pavement form of the brick laying pattern.

Among them, 1 is the permeable brick surface layer, 2 is the coarse sand leveling layer, 3 is the dense asphalt macadam concrete layer; 4 is the graded gravel layer, 5 is the filter geotextile, 6 is the soil foundation, and 7 is the drill hole , 8 is a high-strength floor tile, and 9 is a permeable gap.

Detailed ways

The following is a detailed description of the embodiments of the present utility model. This embodiment is implemented on the premise of the technical solution of the present utility model, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present utility model is not limited to the following the described embodiment.

Example 1

A permeable paving brick pavement structure with a dense asphalt macadam concrete layer, as shown in Figure 1, comprising a soil foundation 6, a graded macadam layer 4, a dense asphalt macadam concrete layer 3 and a permeable paving brick surface layer 1, soil A reverse filter geotextile 5 is laid between the foundation 6 and the graded crushed stone layer 4, a coarse sand leveling layer 2 is set between the permeable brick surface layer and the dense asphalt macadam concrete layer 3, and the permeable brick surface layer 1 is laid on Coarse sand leveling layer 2 on.

Specifically, the dense asphalt macadam concrete layer 3 is laid on the graded macadam layer 4 . The brick pavement 1 includes a plurality of high-strength paving bricks spliced with each other. There is a 1 to 2 cm water-permeable gap 9 between two adjacent high-strength paving bricks. The compressive strength of the high-strength paving bricks is greater than or equal to 50 MPa and the flexural strength is less than Below 5Mpa, as shown in Figure 3, the pattern that high-strength floor tiles 8 are spliced together is a herringbone pattern among the present embodiment; Brickwork pattern (as shown in Figure 5).

The dense asphalt macadam concrete layer 3 is densely graded asphalt concrete, AC or ATB is selected according to the needs during construction, the maximum nominal particle size is less than 20mm, and its thickness is within the range of 12 to 20cm according to the total traffic volume during construction. The graded gravel layer 4 has a thickness in the range of 20 to 40 cm, a porosity of 40%, and a particle size of 2 to 5 cm. The soil foundation 6 is a plain soil compaction layer, and the soil foundation pressure of the plain soil compaction layer 6 is about 93%. The thickness of the coarse sand leveling layer 2 is in the range of 2 to 3 cm and the particle size of the gravel is in the range of 0.5 to 1 cm.

As shown in Figure 2, during construction, boreholes 7 can be set on the dense asphalt macadam concrete layer 3, and the boreholes 7 run through the entire dense asphalt macadam concrete layer 3. The aperture of the boreholes 7 is 2 to 3 cm. The distance from the roadside is not less than 3 times the aperture.

Claims (9)

1. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged, which is characterized in that the pavement structure from On down successively include permeable tile work surface layer, coarse sand screed-coat, closely knit asphalt macadam concrete layer and graded broken stone layer, it is described Graded broken stone layer is laid on soil matrix, and the drilling being evenly arranged is equipped in the closely knit asphalt macadam concrete layer.

2. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 1, special Sign is that the material of the closely knit asphalt macadam concrete layer is dense-graded asphalt concrete, and the closely knit asphalt macadam is mixed Solidifying the thickness of the layer is 12~20cm.

3. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is set according to claim 1 or 2, It is characterized in that, the aperture of the drilling is 2~3cm, and the hole heart of two neighboring drilling is away from not less than 3 times of boring apertures.

4. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 1, special Sign is that the permeable tile work surface layer is spliced by the high-intensitive floor tile of muti-piece rectangle, adjacent two pieces of high-intensitive floor tiles it Between be equipped with 1~2cm permeable gap.

5. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 4, special Sign is that the laying shape of the high intensity floor tile is in herringbone pattern, parquets pattern or running bond pattern.

6. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 1, special Sign is that the coarse sand screed-coat uses partial size for the rubble of 0.5~1cm, the coarse sand screed-coat with a thickness of 2~3cm.

7. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 1, special Sign is that the graded broken stone layer uses partial size for the rubble of 2~5cm, the porosity of the graded broken stone layer is 35%~ 50%, the graded broken stone layer with a thickness of 20~40cm.

8. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 1, special Sign is, anti-filter geotextiles are equipped between the graded broken stone layer and soil matrix.

9. a kind of permeable tile work pavement structure that closely knit asphalt macadam concrete layer is arranged according to claim 1, special Sign is that the soil compaction degree is 90%~95%.