Abstract:In view of the unclear evolution mechanism of the dynamic modulus of reinforced soil and the complicated test process, combined with the GDS dynamic triaxial test, this study conducted a dynamic elastic modulus test of reinforced soil under the influence of different factors, i.e., confining pressure, water content, reinforced materials, and reinforced layers. Three conclusions were drawn: (1) The dynamic elastic modulus of reinforced soil was affected by water content, confining pressure, reinforced materials, and number of reinforced layers, in which the influence order is as follows: water content > confining pressure > number of reinforced layers > reinforced material. (2) The dynamic elastic modulus of reinforced soil is mainly affected by the coupling and arrangement of the reinforced materials and soil particles. (3) This paper proposed a prediction model of dynamic elastic modulus attenuation under the influence of different factors, and its expression conformed to the hyperbolic law. The conclusion has a certain guiding significance for the design and treatment of roadbeds.