This paper calculates the loading stress and surface deflection of flight strip thin layer asphalt pavement with the finite element of three-dimensional isoparametric element,analyzes the effects of the subgrade resilient modulus,the base resilient modulus,and thickness in the completely continuous interface condition.

It also points out that the addition of the thickness of the base course can lower the strain of the tensile strain of the base course and the surface deflection,while the addition of the soil modulus can reduce the surface deflection.

Through analyzing the methods deficiency in being which are used to back calculated pavement layer moduli,the scaled boundary finite element(SBFE)is introduced to solve road surface deflection.

This article describes the development meaning of the laser pavement deflection measuring instrumentation,the measuring theory,the structure of the instrument and the critical technology.

Therefore this paper put forward new corrections for highways of Xinjiang region through systemic study to solve the problem of the acceptance standards about subgrade deflection and pavement deflection in different seasons.

Finally, a FE analysis of pavement deflection is conducted by using the present constitutive model, showing that the intermingle of polymer fibers in asphalt concrete improves efficiently viscelastic property of pavements.