*4.1. Maximum Deflection of Pavement*

According to the relevant parameters, an instantaneous dynamics calculation is carried out in this paper. Figure 9 shows the curve of deflection value change at a node of road surface under a moving load. Table 1 shows the deflection values of each layer of the road structure in the vertical direction. It can be seen that the bending value of the surface layer is the largest, and the bending value of the surface layer and surface layer changes relatively little. When the subgrade is used, the bending settlement value changes greatly, and the fundamental reason is that the material properties of subgrade soil differ greatly from the surface layer, base layer, and cushion layer. The smaller the elastic modulus of the material is, the larger the vertical deformation is. As the bottom layer of the soil foundation is set as a constraint in the calculation, its displacement is zero.

**Figure 9.** Variation curve of pavement deflection value.


**Table 1.** Deflection value of road structure in the vertical direction.
