基于虚土桩模型,研究考虑桩底沉渣影响时均质弹性土体中埋置桩的扭转振动问题.利用土体的边界条件,求得土体的扭转阻抗.根据桩土系统衔接条件和边界条件,利用阻抗函数递推原理,得到桩顶转角和扭转阻抗的解析解.最后通过算例分析研究不同工况下沉渣剪切模量、沉渣厚度对桩顶扭转阻抗的影响. Based on the model of virtual soil pile, the torsional vibration of buried pile in homogeneous elastic soil considering the effect of pile bottom sediment is studied, and the torsional impedance of soil is obtained by using the boundary conditions of soil.According to the connection conditions of pile-soil system and the boundary Conditions, and using the recursion principle of impedance function, the analytic solution of pile top corner and torsional impedance is obtained.At last, the influence of shear modulus and sediment thickness on the torsional impedance of pile top under different conditions is studied.