饱和土中球形空腔稳态振动及其在基桩中的应用

Dynamic Response of a Spherical Cavity in Saturated Soil and Its Application to Piles

利用Ｂｉｏｔ饱和土波动理论求解了饱和土中球形空腔内部受周期性动荷载作用下的动力响应，并分析了球形空腔表面排水条件和振动频率对位移和孔隙水压力的影响。利用上述结果分析了桩在稳态振动下桩端的刚度和阻尼。

In this paper,a solution on the dynamic response of a spherical cavity in saturated soils is obtained on the basis of Biots theory of two phase medium.The effects of drainage condition and vibration frequency on the amplitued of displacements and porewater pressure is analyzed.The solution is used to analyze the dynamic response of piles.It is found that the damping of the pile toe is closely related to the permeability of soil.