Dust removal and drainage macroporous asphalt pavement with graded crushed stone composite layer

Abstract

The invention relates to a dust-removal drainage macropore asphalt pavement comprising a graded crushed stone composite layer. The asphalt pavement is characterized in that an upper surface layer, a middle surface layer, a waterproof anti-cracking layer, a dust-removal composite layer and an upper surface layer are arranged on a pavement structure from bottom to top sequentially; dust-removal devices are buried in the fixing layer of the dust-removal composite layer; the dust-removal devices are dust-removal pipelines which are distributed in a graded crushed stone fixing layer in a grid shape, and through holes are formed in the pipe walls of the dust-removal pipelines; back wash can be performed to the upper surface layer from bottom to top by the aid of the through holes in the dust-removal pipelines; or negative pressure pumping can be performed to seepage water in the upper surface layer by the aid of the through holes in the dust-removal pipelines. According to the dust-removal drainage macropore asphalt pavement comprising the graded crushed stone composite layer, drainage, noise reduction and skid-resistance of the macropore asphalt pavement can be effectively recovered and kept, the service life of the pavement can be prolonged, the pavement drainage efficiency is improved, the pavement accumulated snow melting efficiency is improved, the bulk temperature of the pavement is reduced, the driving safety is ensured, and the driving environment is optimized.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a dust removal and drainage large-pore asphalt pavement containing a graded crushed stone composite layer, which is mainly used for hole cleaning, dust removal, drainage and snow removal of the large-pore asphalt pavement. Background technique [0002] Large-pore asphalt pavement has superior drainage and noise reduction performance. However, due to the characteristics of large pores during the use of large-pore asphalt pavement, clay, oil and rubber particles can easily enter the pores and block the pores. The repeated alternation of rainy and sunny days accelerates this blockage. On rainy days, the clogging substances such as dust and sand in the pores enter the depth of the pavement along the rainwater; on sunny days, the clogging substances are compacted and bonded together with the aggregates, and the pumping effect on low-speed roads is not significant and the c...

AI Technical Summary

Problems solved by technology

[0004] 1. Adopt a vacuum absorption dust removal device, and use negative pressure to absorb tiny dust into the dust removal device, but the method of negative pressure adsorption is not effective in removing dust from larger dust or stone chips;

[0005] 2. Use high-pressure water to wash the road surface and use strong brushing to achieve the effect of dust removal. It can remove part of the dust or stone chips on the road surface, but the dust and stone chips deep in the road can not be cleaned, but will be washed by high-pressure water. The deeper the road, the more serious the consequences;

But in fact, the depth of washing is still not enough. At the same time, the strong scrubbing will destroy the overall structure of the road surface, weaken the overall anti-skid performance of the road surface, and affect the safety of the road.

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