CN109972475A - An ecological permeable pavement structure - Google Patents

Abstract

The invention relates to the technical field of permeable pavement, in particular to an ecological permeable pavement structure. The pavement structure includes, from bottom to top, a soil base layer, a cushion layer, a permeable filter layer, a permeable base layer, a leveling layer and a permeable road surface layer. Between the cushion layer and the permeable filter layer, the permeable base layer and the leveling layer There are permeable geotextiles between them, the permeable filter layer is provided with a drain pipe, and the permeable base layer is assembled with interlocking frame base blocks. The ecological permeable pavement structure of the invention has the advantages of convenient construction, short construction period, favorable recycling and low laying cost; the permeable pavement has good water permeation effect and good drainage effect, and can alleviate the problem of urban drainage system. Pressure; the permeable pavement can filter and purify the suspended particulate matter in the infiltration runoff, and can effectively intercept and adsorb pollutants such as nitrogen, phosphorus, heavy metals, oil pollution in the infiltration runoff, and prevent them from entering the ground and causing pollution.

Description

An ecological permeable pavement structure

The invention relates to the technical field of permeable pavement, in particular to an ecological permeable pavement structure.

Background technique

With the process of large-scale urban construction, a series of ecological and environmental problems caused by urbanization have become increasingly prominent. The hydrological effect of urbanization is one example. The changes of urbanization to the original natural ecological environment affect the process of rainfall, evaporation, and runoff and runoff, and at the same time cause problems such as shortage of urban water resources and urban non-point source pollution, which together constitute the hydrological effect of urbanization. An important manifestation of the hydrological effect of urbanization is the change in the characteristics of urban rainwater runoff and runoff. Due to the substantial increase of impervious areas such as roofs and hard floors, the formation time of rainwater runoff is shortened and the peak flow of rainwater is increased. On the one hand, this may cause waterlogging problems in cities and towns (an example is the waterlogging caused by heavy rain in Beijing in the summer of 2012). The introduction of garbage into urban water bodies can also cause stormwater runoff pollution. What's more serious is that the large amount of oily substances on the urban motor vehicle lanes will cause a large amount of carcinogenic substances in the runoff of the initial rainstorm, such as benzopyrene and benzanthracene, etc., which can be enriched through the food chain after entering the water body, endangering human health.

Permeable pavement is a typical low-impact development measure that regulates urban rainwater runoff by increasing the permeable area of the city. It can not only meet the convenience of people's life, but also have good permeability, reduce the pollutant input of rainwater runoff to urban water bodies, improve the quality of urban water environment, and alleviate the negative impact of urbanization to a certain extent. .

At present, the research on permeable pavement in developed countries started earlier and is more systematic and comprehensive. For example, the United States, Canada, Australia, the United Kingdom, etc. have carried out a lot of research on the runoff control and pollutant reduction of permeable pavement, and accumulated a wealth of research. experience, while the country is still in its infancy. In recent years, driven by the construction of sponge cities and beautiful villages, many regions in China have begun to actively promote the application of permeable pavement, and built large areas of permeable pavement roads, parking lots and squares. However, due to the lack of long-term monitoring data and practical experience, the design structure of some permeable pavements is not reasonable and only focuses on the rainwater infiltration function, and the removal of non-point source pollutants and the design of details are not considered comprehensively, resulting in the benefit of runoff regulation. Difficult to continue to perform effectively.

SUMMARY OF THE INVENTION

1. The technical problem to be solved by the invention

In view of the deficiencies of the prior art, the present invention provides an ecological permeable pavement structure. The permeable base of the permeable pavement is formed by assembling the frame block skeleton, and the permeable road surface layer can also be assembled by permeable bricks and gravel. , is conducive to recycling, and the cost of laying is low; the permeable pavement has good water permeability, and at the same time, the permeable pavement has a good drainage effect, which can relieve the pressure of the urban drainage system; the permeable pavement can filter and purify the suspended particulate matter in the infiltration runoff, And it can effectively intercept and adsorb nitrogen, phosphorus, heavy metals, oil pollution and other pollutants in the seepage runoff, so as to prevent them from entering the ground and causing pollution.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the invention is:

The ecological permeable pavement structure of the present invention includes, from bottom to top, a soil base layer, a cushion layer, a permeable filter layer, a permeable base layer, a leveling layer and a permeable road surface layer, and between the cushion layer and the permeable filter layer, The permeable base layer and the leveling layer are provided with permeable geotextiles, the permeable filter layer is provided with a drainage pipe, and the permeable base layer is assembled with interlocking frame base blocks.

Preferably, the cushion layer adopts graded crushed stone or gravel, and the particle size of the graded crushed stone is 25-35 mm.

Preferably, the permeation filter layer is composed of coarse sand and a drainage pipe, and the particle size of the coarse sand is 3-5mm.

Further preferably, the upper surface of the drainage pipe is flush with the lower surface of the permeable base layer, and the drainage pipe is provided with water seepage holes, so that the water in the permeable base layer can penetrate into the drainage pipe and be discharged through the drainage pipe.

Still further preferably, the outer wall of the drainage pipe is provided with a filter net, the filter net is gauze, and the gauze is wound on the outer wall of the drainage pipe.

Further preferably, the drainage pipes are longitudinally arranged in the permeation filter layer, and a plurality of drainage pipes are provided, and the plurality of drainage pipes are evenly spaced along the transverse length direction of the permeation filter layer.

More preferably, the distance between two adjacent drainage pipes is 3-5m.

Preferably, the frame base block includes a pair of transverse supports and a pair of longitudinal supports, a pair of transverse supports are parallel to each other, a pair of longitudinal supports are parallel to each other, and the longitudinal supports and the transverse supports are perpendicular to each other. Both ends of the longitudinal support and the longitudinal support are provided with joint parts, the part of the transverse support located between the pair of longitudinal supports forms a transverse support section, and the part of the longitudinal support located between the pair of transverse supports forms a longitudinal support section.

Further preferably, the joint portion includes a first surface, a second surface, and a third surface, the first surface is parallel to the second surface, the first surface protrudes from the second surface, and the third surface is connected to the The first and second surfaces are vertical surfaces.

Still further preferably, the two ends of the lateral support are respectively provided with a left joint portion and a right joint portion. The face is aligned with the first face of the right junction and the third face of the left junction is parallel to the third face of the right junction. The two ends of the longitudinal support are respectively provided with a front joint part and a rear joint part. In the longitudinal direction, the first surface of the front joint part is aligned with the second surface of the rear joint part, and the second surface of the front joint part is connected with the rear joint part. The first face of the front joint is aligned with the third face of the front joint and the third face of the rear joint is parallel.

Further preferably, the horizontal support and the vertical support form a "tic-teg-shape".

Further preferably, the voids of the water-permeable base layer are filled with a mixture, the mixture is composed of crushed stone and activated carbon in a ratio of 5:5-8:2, and the particle size of the crushed stone and activated carbon is 10-20 mm.

Preferably, the leveling layer is composed of open-graded crushed stone, and the particle size of the open-graded crushed stone is 5-10 mm.

Further preferably, the surface layer of the permeable road is composed of permeable bricks and crushed stones, the length, width and height of the permeable bricks are 200mm×100mm×60mm, and the adjacent permeable bricks are left with a gap of 2mm and cured with cement, and the particle size of the crushed stone is 3-5mm.

The beneficial effects of the present invention are:

In the ecological permeable pavement structure of the present invention, the drainage pipe of the permeable filter layer is provided with perforations, and the water in the permeable filter layer can penetrate into the drainage pipe through the perforation. The water can be discharged in time through the drainage pipe, which can avoid the overflow of sewage on the road due to the excessive amount of water in the soil base.

In the ecological permeable pavement structure of the present invention, the permeable base is assembled from interlocking base blocks, the entire permeable base is assembled easily, the construction is convenient, and the construction period is short, and the base can be recycled. When the road is reconstructed, the base blocks of the original permeable base are directly disassembled, packaged and transported to other road locations for assembly. It is very convenient to use and greatly reduces the cost of road laying. Activated carbon filling can effectively intercept and adsorb nitrogen, phosphorus, heavy metals, oil pollution and other pollutants in the infiltration runoff, so as to prevent them from entering the ground and causing pollution.

In the ecological permeable pavement structure of the invention, the permeable road surface layer is assembled from permeable bricks and crushed stones. The rapid infiltration of the gravel can avoid the surface water of the permeable road surface layer, and the assembled permeable road surface layer is also convenient for construction, which is conducive to recycling.

The ecological permeable pavement structure of the invention has high permeation efficiency, long service life and strong decontamination ability, and is helpful for the construction of ecological roads and sponge cities.

Description of drawings

1 is a schematic cross-sectional view of the overall structure of an ecological permeable pavement structure of the present invention;

Fig. 2 is the schematic plan view of the water-permeable base layer skeleton of the present invention;

3 is a schematic plan view of a permeable road surface layer of the present invention;

Description of the labels in the diagram:

1. Soil base layer; 2. Cushion layer; 3. Permeable filter layer; 4. Permeable base layer; 5. Leveling layer; 6. Permeable road surface layer; 7. Permeable geotextile; 8. Drain pipe; 9. Permeable brick; ,gravel.

Detailed ways

In order to further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

Example

As shown in Figure 1 , an ecological permeable pavement structure of the present invention includes, from bottom to top, a soil base layer 1, a cushion layer 2, a permeable filter layer 3, a permeable base layer 4, a leveling layer 5 and a permeable road surface layer 6, Between the cushion layer 2 and the permeable filter layer 3, and between the permeable base layer 4 and the leveling layer 5, there are permeable geotextiles 7, and the permeable filter layer is provided with a drainage pipe 8. The permeable base layer has interlocking frame base blocks. assembled.

Preferably, the cushion layer 2 adopts graded crushed stone or gravel, and the particle size of the graded crushed stone is 25-35 mm.

Preferably, the permeation filter layer 3 is composed of coarse sand and a drainage pipe 8, and the particle size of the coarse sand is 3-5 mm.

Further preferably, the upper surface of the drainage pipe 8 is flush with the lower surface of the permeable base 4, and the drainage pipe 8 is provided with water seepage holes, so that the water in the permeable base penetrates into the drainage pipe 8 and passes through the drainage pipe 8. discharge.

Still further preferably, the outer wall of the drainage pipe 8 is provided with a filter net, the filter net is gauze, and the gauze is wound on the outer wall of the drainage pipe.

Further preferably, the drainage pipes 8 are longitudinally arranged in the permeation filter layer, and a plurality of drainage pipes 8 are provided, and the plurality of drainage pipes 8 are evenly spaced along the transverse length direction of the permeation filter layer.

More preferably, the distance between two adjacent drainage pipes 8 is 3-5m.

Preferably, the 4 blocks of the permeable base layer include a pair of transverse supports and a pair of longitudinal supports, a pair of transverse supports are parallel to each other, a pair of longitudinal supports are parallel to each other, and the longitudinal supports and the transverse supports are perpendicular to each other, and the two transverse supports are parallel to each other. Both ends of the end and the longitudinal support are provided with joint parts, the part of the transverse support located between the pair of longitudinal supports forms a transverse support section, and the part of the longitudinal support located between the pair of transverse supports forms a longitudinal support section.

Further preferably, the joint portion includes a first surface, a second surface, and a third surface, the first surface is parallel to the second surface, the first surface protrudes from the second surface, and the third surface is connected to the The first and second surfaces are vertical surfaces.

Still further preferably, the two ends of the lateral support are respectively provided with a left joint portion and a right joint portion. The face is aligned with the first face of the right junction and the third face of the left junction is parallel to the third face of the right junction. The two ends of the longitudinal support are respectively provided with a front joint part and a rear joint part. In the longitudinal direction, the first surface of the front joint part is aligned with the second surface of the rear joint part, and the second surface of the front joint part is connected with the rear joint part. The first face of the front joint is aligned with the third face of the front joint and the third face of the rear joint is parallel.

Further preferably, the horizontal support and the vertical support form a "tic-teg-shape".

Further preferably, the voids of the permeable base layer 4 are filled with a mixture, the mixture is composed of crushed stone and activated carbon in a ratio of 5:5-8:2, and the particle size of the crushed stone and activated carbon is 10-20mm.

As a preferred embodiment, the mixture is composed of crushed stone and activated carbon in a ratio of 7:3.

Preferably, the leveling layer 5 is composed of open-graded crushed stone, and the particle size of the open-graded crushed stone is 5-10 mm.

Further preferably, the permeable road surface layer 6 is composed of permeable bricks 9 and gravel 10, the length, width and height of the permeable bricks 9 are 200mm × 100mm × 60mm, and the adjacent permeable bricks 9 leave a gap of 2mm and use cement to solidify, The particle size of the crushed stone 10 is 3-5 mm.

As a preferred embodiment, the permeable bricks are ceramic permeable bricks.

The present invention and its embodiments have been described above schematically, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, and without departing from the purpose of the present invention, creatively design structures and embodiments similar to this technical solution, all should belong to the protection scope of the present invention. .

Claims (9)

1. a kind of ecological permeable paving structure, it is characterised in that: from bottom to top successively include soil matrix layer (6), bed course (5), infiltration Filter layer (4), porous base course (3), screed-coat (2) and permeable road deck (1), the bed course (5) and permeatable filter layer (4) Between, it is designed between the porous base course (3) and screed-coat (2) permeable geotextiles (7), the permeatable filter layer (4) Equipped with drainpipe (8), the porous base course (3) has the building block of interlocking-type frame base to be assembled.

2. a kind of ecological permeable paving structure according to claim 1, it is characterised in that: the bed course (2) uses gradation Rubble or gravel, graded broken stone partial size are 25-35mm.

3. a kind of ecological permeable paving structure according to claim 1, it is characterised in that: the permeatable filter layer (3) by Coarse sand and drainpipe (8) form, and coarse sand partial size is 3-5mm, and the outer wall of the drainpipe (8) is provided with filter screen, filter screen For gauze, gauze is wound on the outer wall of drainpipe, and the drainpipe (8) is set in permeatable filter layer along longitudinal direction, drainpipe (8) it is equipped with multiple, multiple drainpipes (8) are uniformly distributed along permeatable filter layer lateral length direction interval, two neighboring described The distance between drainpipe (8) is 3-5m.

4. a kind of ecological permeable paving structure according to claim 1, it is characterised in that: the porous base course (4) is built Block includes a pair of of cross-brace and a pair of of longitudinal bracing, and a pair of of cross-brace is parallel to each other, and a pair of of longitudinal bracing is parallel to each other, and And longitudinal bracing is mutually perpendicular to intersect with cross-brace, the both ends of cross-brace and the both ends of longitudinal bracing are respectively provided with engaging portion, The part that cross-brace is located between a pair of of longitudinal bracing forms cross-brace section, and longitudinal bracing is located between a pair of of cross-brace Part formed longitudinal bracing section.

5. a kind of ecological permeable paving structure according to claim 4, it is characterised in that: the engaging portion includes first Face, the second face, third face, the first face is parallel to second face, and the first face protrudes from second face, and third face connects It is connected to the first face and the second face, is vertical plane.

6. a kind of ecological permeable paving structure according to claim 5, it is characterised in that: the both ends of the cross-brace Left junction portion and right junction portion is respectively set, horizontally, the first face of left junction portion and the second of right junction portion face neat a, left side Second face at joint portion and the first of right junction portion face together, and the third face of left junction portion and the third face of right junction portion are parallel. Preceding joint portion and rear joint portion is respectively set in the both ends of the longitudinal bracing, and in the longitudinal direction, first face at preceding joint portion is with after The second of joint portion in face of neat, the first of second face at preceding joint portion and rear joint portion in face of neat, the third face at preceding joint portion with The third face at joint portion is parallel afterwards.

7. a kind of ecological permeable paving structure according to claim 4, it is characterised in that: the cross-brace and longitudinal direction Support constitutes " groined type ", and the gap of the porous base course (4) is filled using mixture, and mixture is by rubble and active carbon The partial size of 5: 5-8: 2 composition in proportion, rubble and active carbon is 10-20mm.

8. a kind of ecological permeable paving structure according to claim 1, it is characterised in that: the screed-coat (5) is by opening Graded broken stone composition, the partial size of open gradation rubble are 5-10mm.

9. a kind of ecological permeable paving structure according to claim 1, it is characterised in that: the permeable road deck (6) it is made of water-permeable brick (9) and rubble (10), water-permeable brick (9) length, width and height are adjacent permeable having a size of 200mm × 100mm × 60mm Brick (9) is there are the gap of 2mm and uses cement solidification, and the partial size of rubble (10) is 3-5mm.