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在考虑土体切向振动对横向振动影响的基础上,建立土体振动模型。对土体水平阻抗修正后与经典解进行比较,证明文中解的正确性;然后,利用矩阵传递法得到大直径端承桩的水平阻抗、摇摆阻抗及其耦合阻抗。通过参数讨论发现长细比和桩土相对刚度是影响大直径桩基动力特性的主要因素,说明该模型能够更为准确地预测大直径桩的振动特性。
On the basis of considering the influence of tangential vibration of soil on lateral vibration, a soil vibration model is established. After the correction of the soil horizontal impedance is compared with the classical solution, the correctness of the solution in the paper is proved. Then, the horizontal impedance, the rocking impedance and the coupling impedance of the large-diameter end bearing pile are obtained by the matrix transfer method. Through discussing the parameters, it is found that the slenderness ratio and the relative stiffness of pile-soil are the main factors affecting the dynamic characteristics of large-diameter pile foundation, which shows that the model can predict the vibration characteristics of large-diameter pile more accurately.