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

A kind of asphalt pavement and durability technology, which is applied to the coagulation pavement paved on site, roads, roads, etc., can solve the problems of easy damage and unreasonable design of asphalt pavement, so as to improve the design level and service life, and improve road construction Quality and Service Levels, Effects of Reducing Life Cycle Costs of Asphalt Pavements

Active Publication Date: 2014-03-26
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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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.

Method used

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

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Embodiment approach

[0036] 1. Strength criterion, resistance model and design method of durable asphalt pavement

[0037] Through the strength test of asphalt mixture under three-dimensional complex stress state, the strength theory and failure criterion of asphalt mixture under complex stress state are established. The strength theory and failure criterion are the closest to the actual situation of asphalt pavement. Intensity control parameters and standards.

[0038]According to the typical failure forms (such as deflection, rutting, cracking, etc.) of the existing representative expressway asphalt pavement in my country, through data collection, field tests and theoretical analysis, the main influencing factors of various typical failure forms are clarified and their evolution is revealed On this basis, re-understand the damage mode, failure criterion and damage source of asphalt pavement.

[0039] According to the different levels and functions of the surface layer and the base structure, the...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32
Inventor 郑健龙吕松涛
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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