Pavement overhaul method and structure for treating different lane road surfaces with large road condition differences

Abstract

The invention provides a pavement overhaul method and structure for treating different lane road surfaces with large road condition differences. The method comprises the steps that a cold in-place recycling technology is adopted in a seriously-damaged middle lane in an old road surface structure to carry out foundation layer deep treatment, and direct paving is carried out on slightly-damaged side lanes; before foundation layer deep treatment with the cold in-place recycling technology is carried out, an old asphalt surface layer within the range of the middle lane is milled firstly, and then, cold in-place recycling is carried out on an old foundation; and a cold in-place recycling mixture layer is paved with a dense bitumen bituminous stabilized macadam layer until the height is coincident with the height obtained before the side lanes are paved with surfaces, and finally, the whole section is paved with two bituminous concrete layers in a unified manner. By means of the structure, before the whole section of an old road is paved with the bituminous concrete layer, according to the condition of the old road, treatment of different degrees is carried out, and the composite resilient modulus of the top faces of the different lanes in the same section is close, so that the influence of the large road condition differences of the different lane road surfaces on the newly-paved asphalt surface layer is reduced; and the longitudinal reflection cracks of the road surface are delayed, and the service life of the road surface is prolonged.

Description

technical field [0001] The invention relates to a road surface overhaul method and structure for dealing with large differences in road conditions of different lanes. Background technique [0002] Asphalt pavement is the main structural type of urban road pavement in my country. The asphalt pavement built in the early stage has reached the end of its service life, and has entered the stage of maintenance, reconstruction and expansion one after another. Through investigation, it is found that for the multi-lane cross-section type, the severity of road surface diseases of different lanes is often quite different, and the most serious disease and deflection are the lanes with heavy load bearing. Generally, the lanes with heavy load are located in the middle, mainly The reason is that the frequency of heavy-duty vehicles in the middle lane is high and the speed is slow, which accelerates the damage of the road surface. Therefore, different treatment methods for old roads are re...

AI Technical Summary

Problems solved by technology

Through investigation, it is found that for the multi-lane cross-section type, the severity of road surface diseases of different lanes is often quite different, and the most serious disease and deflection are the lanes with heavy load bearing. Generally, the lanes with heavy load are located in the middle, mainly The reason is that the frequency of heavy-duty vehicles in the middle lane is high and the speed is slow, which accelerates the damage of the road surface

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