CN209798473U - Road system with multilayer water purification structure - Google Patents

Abstract

The utility model belongs to the field of pavement rainwater purification, in particular to a road system with a multi-layer water purification structure, comprising the uppermost OGFC surface layer and a horizontal drainage pipe, from the OGFC surface layer down to a graded crushed stone layer, a clean A water-sand cushion, a horizontal drainage pipe, and a plain soil compaction layer; an activated carbon net is laid inside the water-cleaning sand cushion. The road system of the utility model solves the problem that the existing drainage system cannot effectively purify rainwater. The multi-layer road layer gradually absorbs pollutants in the rainwater, and the system will not reduce the mechanical strength and water permeability of the road surface, and can effectively reduce the rainwater pollution in the rainwater. Acidic substances, heavy metals and other pollutants, to achieve a good effect of purifying rainwater.

Description

A road system with multi-layer water purification structure

technical field

The invention belongs to the field of pavement rainwater purification, in particular to a road system with a multi-layer water purification structure.

Background technique

Large-porosity OGFC (Open Graded Friction Course, open graded anti-skid surface) asphalt pavement has many years of practical experience, and has made great progress in drainage and noise reduction, effectively solving the problem of water accumulation and noise on urban roads. Bigger problem. Most of the rainwater will flow out of the city through sewage pipes, so it cannot supplement the water resources inside the city, which is one of the important reasons for the urban heat island effect. Some rainwater will flow directly into urban land, and the rainwater will contain more pollutants in the early stage of rainfall. According to statistics, more than 60% of water pollution is caused by rainwater. During the rainfall process, the rainwater dissolves a large amount of car exhaust and acid Gas and industrial waste gas, if left unchecked, will cause great pollution to urban land. Whether it is discharged outside the city or left alone will cause great waste in terms of economy and resources. Coupled with the strengthening of the concept of green environmental protection in recent years, how to reduce pollutants in rainwater has become very important. However, there is no unified and perfect rainwater purification measure at present, therefore, a pavement design for purifying rainwater inside the road is urgently needed.

Contents of the invention

The problem to be solved by the present invention is to overcome the shortcomings of the background technology and provide a road system with a multi-layer water purification structure.

The present invention is achieved through the following technical solutions:

A road system with a multi-layer water purification structure, including the uppermost OGFC surface layer and horizontal drainage pipes, from the OGFC surface layer down to the graded crushed stone layer, water purification sand cushion, horizontal drainage pipes and plain soil A compacted layer; an activated carbon net is laid inside the water-purifying sand cushion layer.

Preferably, the OGFC surface layer is divided into two layers, from top to bottom are a small-porosity OGFC surface layer and a large-porosity OGFC surface layer.

Further, the porosity of the small-porosity OGFC surface layer is 18%-21%; the porosity of the large-porosity OGFC surface layer is 21%-24%.

Further, one or more kinds of adsorptive aggregates are added to the small porosity OGFC surface layer during the compounding process of the mixture.

Further, the OGFC surface layer with large porosity is mixed with one or more kinds of adsorptive aggregates during the compounding process of the mixture, and a small amount of activated carbon is added during the stirring process.

Further, the height of the activated carbon net is 1-2cm.

Further, the surface of the activated carbon mesh is non-planar.

Further, the end of the horizontal drainage pipe is painted with a water-cleaning coating.

Further, ceramsite adsorption material is added to the water-purifying sand cushion during the paving process.

Preferably, the thickness of the graded gravel layer is 20-30cm.

Beneficial effects of the present invention:

1. The present invention discloses a road system with a multilayer water purification structure, which solves the problem that the existing drainage system cannot effectively purify rainwater. The multilayer water purification structure gradually absorbs pollutants in the rainwater, and the road system will neither Reducing the mechanical strength and water permeability of the pavement can effectively reduce acidic substances, heavy metals and other pollutants in rainwater, and achieve a good effect of purifying rainwater.

2. The rainwater discharged after being purified by the road system of the present invention will not pollute the soil, and can be directly recycled, providing a new method for efficient and economical utilization of water resources.

3. The road system of the present invention has a remarkable purification effect, can effectively reduce pollution, increase urban soil moisture content, and save water resources to the greatest extent.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the figure, 1 small porosity OGFC surface layer, 2 large porosity OGFC surface layer, 3 graded gravel layer, 4 activated carbon net, 5 water purification sand cushion, 6 horizontal drainage pipe, 7 plain soil compaction layer, 8 clean Water coating.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them, so it should not be construed as a limitation of the present invention.

The road system of the present invention comprises an OGFC surface layer, a graded crushed stone layer 3, a water-cleaning sand cushion layer 5, a horizontal drainage pipe 6 and a plain soil compaction layer 7 from top to bottom. Among them, the preferred OGFC surface layer in this implementation is a double layer, which is the upper small-porosity OGFC surface layer 1 and the lower large-porosity OGFC surface layer 2. The purpose of setting the double-layer OGFC surface layer is to reduce noise. Improve the water purification effect, the upper small porosity OGFC surface layer 1 can prevent the clogging effect of large particles of pollutants, and the flow rate of rainwater after passing through the small porosity OGFC surface layer 1 can be reduced more than the lower layer of large porosity OGFC surface layer 2 Contact to improve the water purification effect. The porosity of the above-mentioned small porosity OGFC surface layer 1 is preferably between 18% and 21%, and the porosity of the large porosity OGFC surface layer 2 is preferably between 21% and 24%. And the above-mentioned small porosity OGFC surface layer 1 is mixed with stronger absorbing aggregates such as quartz sand and quartzite in the process of mixing the mixture, and the OGFC surface layer 2 with large porosity is mixed with quartz sand, quartzite, etc. in the process of mixing the mixture For aggregates with strong adsorption such as quartzite, a small amount of activated carbon is added during the stirring process.

Activated carbon net 4 is laid inside described water purification sand cushion layer 5, and activated carbon net 4 has very good purifying effect to the organic pollutant in rainwater, and the active carbon content in the activated carbon net 4 needn't be too high, and activated carbon net 4 height is 1- 2cm is better. Preferably in this embodiment, the surface of the activated carbon mesh 4 is non-planar, and the non-planar configuration of the activated carbon mesh 4 can make the rainwater fully contact with the activated carbon mesh 4, which can increase the specific surface area and improve the water purification effect without reducing the drainage efficiency. The surface of the activated carbon net 4 can be in various styles, as long as the non-planar surface can achieve the effect. In this embodiment, the activated carbon mesh 4 is composed of several inclined surfaces, and the surface is each inclined surface.

The end of the horizontal drain pipe 6 is coated with a water-cleaning coating 8 to further purify the rainwater. Water-purifying sand cushion 5 adds ceramsite adsorption material in the paving process. Preferably, the thickness of the graded gravel layer 3 is optimally 20-30 cm.

When the road system rainwater of the present invention passes through the double-layer OGFC surface layer, a large amount of pollutants have been filtered, purified and adsorbed by the OGFC surface layer, and the rainwater continues to infiltrate, and can be further filtered and purified through the water purification sand cushion layer 5 and activated carbon net 4 Finally, when the rainwater is discharged from the road surface through the horizontal drain pipe 6, the water purification coating 8 at the end of the horizontal drain pipe 6 will also play a role in continuing to purify the rainwater. The finally discharged rainwater will not pollute the soil, and even the discharged rainwater can be Direct recycling. The road system of the present invention has better purification effect, not only can effectively reduce pollution, but also can increase urban soil moisture content, and save water resources to the greatest extent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; those of ordinary skill in the art should understand that they can still modify the technical solutions described in the above embodiments, or Some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. A road system with multilayer water purification structure, includes OGFC surface course and horizontal drain pipe (6) of the superiors, its characterized in that: the OGFC surface layer is sequentially provided with a graded crushed stone layer (3), a purified water sand cushion layer (5), a transverse drain pipe (6) and a soil compacting layer (7) from the OGFC surface layer to the bottom; and an active carbon net (4) is paved inside the water purification sand cushion layer (5).

2. The roadway system with the multilayer water purification structure of claim 1, wherein: the OGFC surface layer is divided into two layers, namely a low-porosity OGFC surface layer (1) and a high-porosity OGFC surface layer (2) from top to bottom.

3. The road system with multilayer water purification structure of claim 2, characterized in that: the small porosity OGFC surface layer (1) has the porosity of 18-21%; the porosity of the large-porosity OGFC surface layer (2) is 21-24%.

4. The roadway system with the multilayer water purification structure of claim 1, wherein: the height of the activated carbon net (4) is 1-2 cm.

5. The roadway system with the multilayer water purification structure of claim 1, wherein: the surface of the active carbon net (4) is non-planar.

6. The roadway system with the multilayer water purification structure of claim 1, wherein: and the tail end of the transverse drainage pipe (6) is coated with a clean water coating (8).

7. The roadway system with the multilayer water purification structure of claim 1, wherein: the thickness of the graded crushed stone layer (3) is 20-30 cm.