Solutions for Saturated Soil Under Moving Loads and Engineering Applications

The dynamic response of ground subjected to moving loadings was investigated. The ground was modeled as a saturated poroelastic half-space. Based on Biot's fully dynamic poroelastic theory, the analytical solution of the poroelastic half-space soil medium due to moving loadings were obtained through Fourier transform. The time-domain solution is obtained by the inverse fast Fourier transform. Combined with Kirchhoff small-deflection thin-plate theory, the model was applied to investigate the ground vibration induced by highway roads. Furthermore, the saturated soil model was extended to investigate the ground vibration subjected to high-speed trains incorporating the rail and embankment models. In situ measurement of the vibration level at the site of the Beijing-Tianjin intercity line during the passage of trains was conducted. Comparison between the predicted results and measured results agreed well. The influences of the load speed, the soil characteristics and the properties of the upper structure on the traffic-induced ground vibration were investigated systematically.