Highway engineering new and old pavement splicing structure and construction method thereof

Abstract

The invention discloses a highway engineering new and old pavement splicing structure and a construction method thereof, and belongs to the field of highway reconstruction and extension projects. Thenew and old pavement splicing structure comprises an original pavement and a new pavement, the new pavement sequentially comprises a cushion layer, a subbase layer, a base layer, a lower surface layer, a middle surface layer and an upper surface layer from bottom to top, and the upper surface layer is laid at the top of the middle surface layer and the top of the original pavement; non-fine macroporous concrete drainage belts are arranged at the splicing parts of the cushion layer and the subbase layer and the original pavement, and a cast-in-place concrete layer is arranged at the splicing part of the base layer and the original pavement; and reinforcing steel bars and reinforcing pieces are arranged between the cast-in-place concrete layer and the original pavement. The construction method of the new and old pavement splicing structure comprises the following steps of: S1, surveying and setting out; S2, milling an old road; S3, excavating steps; S4, constructing the cushion layer andthe subbase layer; S5, constructing the base layer; and S6, constructing an asphalt surface layer. The phenomena of deformation and differential settlement at the joint of new and old pavements are reduced, the common quality problem of longitudinal reflection cracks of the pavement is reduced, and the service life of the pavement is prolonged.

Description

technical field [0001] The invention relates to the field of expressway reconstruction and expansion engineering, more specifically, it relates to a splicing structure of new and old road surfaces in highway engineering and a construction method thereof. Background technique [0002] With the rapid development of my country's transportation industry, the traffic volume of expressways and municipal roads is also increasing year by year. Many roads have not reached the service life, and the traffic volume is already saturated or tends to be saturated. The improvement measures for the saturated roads are basically two. , One is to build a double track, and the other is to expand and widen the original road. Highway expansion and widening have the advantages of less investment and land saving, and are given priority when geological and environmental conditions permit. The splicing effect of the new and old pavement in the highway reconstruction and expansion project directly aff...

AI Technical Summary

Problems solved by technology

[0003] In the splicing and widening process of the existing road surface, there are phenomena of uneven settlement and reflection cracks in the asphalt surface layer. Therefore, the present invention provides a new and old road surface splicing structure for highway engineering and its construction method

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