Abstract：Study on physical and mechanical properties of model test of the embankment with weathered gravelly sand rock filling under static cyclic loads，and penetrative and marinated water and CBR test are introduced. Based on observations of the test，physical and mechanical properties，such as porosity ratio，angle of internal friction，cohesion value，consolidation compressive modulus，permanent deformations，pressure distribution，CBR value，bedding coefficient，deformation modulus and deformation coefficient of the embankment and so on，are obtained. It is found that the soil is low compressibility soil，sink to decline not easily after compaction，these values can satisfy the temporary provision of Beijing—Shanghai express railway design and the design standard of Germany express railway roadbed，its CBR value is almost linear increment with the increase of compaction counts，the inflation quantity of socking in water is almost constant with time of marinated water，its permeability is strong，its settlement and mechanics properties is nearly constant. With constitutive model for Drucker-Prager material，stress and deformation characteristics of the embankment under static loads by finite element theory are analyzed，the numerical solutions are close to experimental ones. It is expected to put into use for design of roadbed，control of compaction quality and construction in subgrade filling engineering.
