关键词: 沥青路面, 应变, 反算

Abstract: The fundamental methods of nondestructive evaluations of pavement structure and its importance in pavement management system are discussed in this paper firstly. The applications of strains in pavement structure design and methods of using'strain standard to design pavement thickness in the world are also analyzed. Based on these analyses, the fundamental consideration to backcalculate the strains at the bottom of the asphalt layer is presented. By detailed deriving, the strain calculation equations are obtained. By comparison calculation of using Chevron program, a theoretical formula by erroneous modification is also obtained. The formulas presented in this paper are in good correspondence with theoretical formulas.

Key words: asphalt pavement, strain, backcalculation