柔性路面优化设计是按下述方法进行的。由各结构层厚度组成的路面结构设计应满足以下条件: 1.路面结构的综合弹性模量应不小于要求的弹性模量.整个结构层受弯时最大拉应力不应’大于受弯时允许极限拉应力 Flexible pavement design optimization is carried out as follows. The pavement structure designed by the thickness of each structural layer should meet the following conditions: 1. The comprehensive elastic modulus of the pavement structure should not be less than the required elastic modulus. The maximum tensile stress of the entire structural layer should not be greater than the allowable bending moment Ultimate tensile stress