Abstract: The numerical simulation model of pilesoil system was established in AMESim， and the effect of excitation frequency and soil condition on the vibration friction characteristics in the process of pile driving was studied. The effects of pile driving were obtained by comparing the curves of sinking pile displacement， pile tip resistance and side frictional resistance versus different parameters. The results reveal that the amplitude of pile driving decreases with increasing the vibration frequency. The initial pile resistance increases with improving the soil cohesion. And with bigger soil volume weight， the change rate of pile resistance increases. Thus， the vibration frequency interval with less friction can be obtained， and improving the efficiency of pilesoil system in civil building.

Key words: pilesoil system, vibration utilization, nonlinear vibration, vibration friction