Asphalt pavement best surface thickness combination determining method based on gray relative analysis method

Abstract

The invention discloses an asphalt pavement best surface thickness combination designing method based on a gray relative analysis method. The method comprises the steps that firstly, according to different thickness combinations of existing asphalt pavement surface layers, the thicknesses of existing inorganic binder stable base asphalt pavements are divided into different combinations; secondly,finite element analysis is performed on the asphalt pavement surfaces, and on the basis of ABAQUS modeling, the maximum shear stress, the maximum asphalt layer bottom tension strain, the maximum inorganic binder layer bottom tension strain and the maximum roadbed top face vertical compression strain of different inorganic binder stable base asphalt pavement thickness structures are obtained; finally, by means of a gray relative analysis method, various control indexes are comprehensively analyzed and compared, according to the control indexes, the influence degrees of inorganic binder stable base asphalt pavement damage and various combination structures are ranked, and therefore the best surface layer thickness combination of the inorganic binder stable base asphalt pavement is obtained;the problem that the best structure cannot be selected easily due to the fact that various pavement structure control index changes are complex is solved.

Description

technical field [0001] The invention belongs to the technical field of highway pavement design, in particular to a method for determining the optimum surface layer thickness combination of asphalt pavement based on a gray relational analysis method. Background technique [0002] With the rapid development of my country's economy, the number of road transport vehicles is increasing day by day, and the problem of pavement structure damage is becoming more and more serious. It is urgent to continuously innovate pavement design methods to promote the sustainable development of pavement structures and improve the design period and service life of pavement structures to adapt to future technologies. need. [0003] At present, the asphalt concrete pavement structure of inorganic binder stable base is widely used in our country. stability characteristics. And the resulting reflective cracks in the asphalt pavement. [0004] Among the high-grade highways that have been built and op...

AI Technical Summary

Problems solved by technology

In view of the inherent characteristics of the semi-rigid base material itself, it is almost inevitable that the asphalt pavement with a semi-rigid base will cause reflective cracks in the cracking of the stable base of the inorganic binder due to the excessive tensile stress at the bottom of the inorganic binder layer during use, thereby affecting The quality of asphalt pavement reduces the service life of asphalt pavement

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