Study on Vibration Response of Surrounding Environment Caused by High-Speed Train Operation

A finite element calculation model is established on basis of a ballastless high-speed railway passing through a section of Nanchang to study the propagation law of high-speed railway vibration in soil and the influence of hollow trench isolation on soil vibration. The three-dimensional finite element model for calculating the vibration response of high-speed railway and the two-dimensional finite element model for vibration isolation of high-speed railway are established. It is concluded that, as the train speed increases, the displacement, speed and acceleration of the soil increase, and the vibration period shortens; as the distance from the vibration source increases, the surface displacement, velocity, and acceleration of the soil f shows a trend of increasing first, then decreasing, and then increasing fluctuations along the roadbed-soil propagation path. The horizontal vibration response of the soil is greater than the vertical vibration response. And within a certain range, And in a certain range, the empty groove farther from the centerline of the track, the better the vibration isolation effect. When the train speed is 350 km/h, the distance from the vibration source should be 16 ∼ 22 m, and the vibration isolation effect is better.