Study on resistance factor of saturated soil caused by longitudinal vibration of pile

The characteristics of the resistance factor of soil caused by longitudinal vibration of elastic bearing pile embedded in saturated soil layer are analytically studied by using three-dimensional axisymmetric model. The dynamic model of the saturated soil layer effected by longitudinal vibration of the pile is founded. Taking into account the wave propagations in the saturated soil layer, characteristics of the resistance factor of soil are analyzed. The effects of the seepage force, the depth of soil layer,the reaction coefficient of soil and the modulus ratio of pile and soil on the soil resistance are studied. The comparisons among the 3D axisymmetric solution, the single-phase degenerated solution, the two-phase solution neglecting the radial motion and Hu Changbin’s visco-elastic solution are presented at last.