Firstly

on the basis of wheel-track interaction theory

a function of exciting force of moving train on elevated line is established. Then

the exciting force is acted on the three-dimensional numerical models of rail structure

elevated line and soil foundation by utilizing the finite element software. The surrounding environment vibration response caused by train operation is simulated; and the numerical results are compared and verified by the field measurement data. Furthermore

the parameter effects of length of bridge span

train speed and soil properties on environment vibration are studied. On the basis of investigation of parameter influence characters and according to the statistical analysis

a prediction formula of vibration level on ground induced by urban rail transit with elevated line is presented and validated by the field experiments. The research results show that the numerical simulation and prediction can truly reflect the actual environment vibration caused by urban rail transit with elevated line.