Design method for durable bituminous pavement with layer-by-layer progressively-increased structural layer life

Abstract

A disclosed design method for durable bituminous pavement with layer-by-layer progressively-increased structural layer life consists of a durable surface layer, a long-life basic layer and a permanent roadbed; the durable surface layer is disposed on the long-life basic layer, and the long-life basic layer is disposed on the permanent roadbed; and the durable surface layer consists of a middle-upper surface layer and a lower surface layer, wherein the middle-upper surface layer is disposed on the lower surface layer. The method helps to change the damage mode of bituminous pavements and establish the bituminous pavement with the layer-by-layer progressively-increased structural layer life, so that the damage of the bituminous pavement firstly happens at the upper part of the pavement, and the bituminous pavement only needs milling and plane operation and overlay restoration at the surface when maintenance is carried out, and thus the repaving thickness during maintenance repaving is relatively thin. The design method helps to substantially improve the design level and the service life of the bituminous pavement, effectively reduce the life-cycle cost of bituminous pavement and extremely improve the construction quality and the service level of roads.

Description

technical field [0001] The invention belongs to the technical field of road design and construction, and in particular relates to a durable asphalt pavement whose service life of structural layers increases layer by layer. Background technique [0002] my country's current "Code for Design of Highway Asphalt Pavement" (JTGD50-2006) stipulates that the design life of the asphalt pavement of expressways and first-class highways is 15 years, and that of ordinary roads is 6-12 years, and the design life of the surface layer and the base layer are equal. According to this standard, even if the design goal is fully realized, nearly 10,000 kilometers of highway asphalt pavement will still have to be overhauled from the surface layer to the base layer every year after a few years; The above-mentioned construction period will also have a great negative impact on the traffic capacity and transportation efficiency of the road network, and will also exert huge social pressure on the tra...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of durable asphalt pavement with the service life of the structural layer increasing layer by layer. The surface layer is easily damaged, the base layer is rarely damaged, and the roadbed is basically not damaged, showing unequal service life, and the design of asphalt pavement is unreasonable.

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