rail traffic;  ground vibration;  saturated foundations;  thin-layer method;  Vibration evaluation

Aiming at the ground vibration problem caused by train operation on saturated foundation, the interaction force between track and roadbed is calculated by using the train-track finite element model, and the excitation load is calculated by ground vibration after Fourier transformation. On this basis, combined with the saturated foundation dynamic Green function obtained by the thin layer method, the ground vibration generated under the traveling conditions of the train on the saturated foundation was calculated and evaluated. The results show that the train speed has a great influence on the vibration within a certain range. The ground vibration caused by the train can basically meet the vibration standard of residential areas at the near track.