Through the on-site filling test in the subgrade test section of Lanzhou-Xinjiang Railway two-line in desert area

the relationship between dynamic deformation modulus Evd and subgrade filler as well as the compaction quality of the filler is analyzed

which shows a lack of correlation between Evd and K30 (ground coefficient)

while Evd is well correlated to Ev2 (static modulus of deformation). After analyzing the influence factors of Evd by combining the numerical calculation of ADINA (three-dimensional dynamic finite element software) with field test

the findings indicate the following conclusions. Complete linear correlation exists between Evd and Ed (dynamic modulus) in theory

their correlation formula has something to do with dynamic angle of internal friction and dynamic cohesion. When the filler dynamic cohesion keeps low

Evd increases with the dynamic cohesion and dynamic angle of internal friction; while Evd will not change with them when the filler dynamic cohesion is large enough. Also

Evd relates to the shearing strength of soil under the impact load. With Ed stays established

Evd increases with the shearing strength which is relatively low

but when the shearing strength reaches a certain value

Evd will no longer change.