Maintenance method of dust removal and drainage macroporous asphalt pavement with graded crushed stone composite layer

Abstract

The invention discloses a method for maintaining a dust-removing and drainage large-porosity asphalt pavement containing a graded crushed stone composite layer, which is characterized in that the pavement structure consists of a lower layer, a middle surface layer, a waterproof and anti-cracking layer, and a dust-removing composite layer in sequence from bottom to top and the upper layer; the dust removal composite layer is to bury the dust removal pipeline in the fixed layer in a grid arrangement in the graded crushed stone fixed layer, and a through hole is opened on the pipe wall of the dust removal pipeline; the present invention is aimed at the maintenance of the road surface The upper layer is backwashed from bottom to top through the through hole on the dust removal pipeline; or the seepage water in the upper layer is sucked out under negative pressure through the through hole on the dust removal pipeline. The invention can effectively restore and maintain the drainage noise reduction and anti-skid ability of the large-pore asphalt pavement, prolong the service life of the pavement, improve the drainage efficiency of the pavement, improve the snow melting efficiency of the road area, reduce the overall temperature of the pavement, and ensure driving safety. Optimize the driving environment.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a maintenance method for 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 no...

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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