非均质土层下基桩的动力稳定性研究

本文根据桩在轴向谐振力作用下，探讨了非均质层下基桩的动力稳定性问题，分析了各种地基土横向抗力系数K以及桩的几何特征，激振频率，桩土阻尼对桩动力稳定性的影响，结果表明，随地基土层的不同，基桩的动力不稳定区域将发生不同的变化，随桩径，桩长的增大，基桩的动力不稳定区域将逐渐减小，表明地基土的横向抗力对桩的动力稳定性起加强作用，桩土阻尼对基桩的动力稳定性影响较大，得出了一些有价值的结论，可为工程设计提供参考依据。

Dynamic Stability Analysis of Foundation Pile Under Non-homogeneous Soil

In this paper, based on the analysis of single pile under axial dynamic load, the problems of dynamic stability of foundation pile under non-homogeneous soil were discussed. The effects of various coefficient K of lateral resisting force of foundation soil, geometrical characteristics of pile, exciting frequency, as well as damping of pile and soil were studied. The results show that, the dynamic non-stability region will be changed with different soil, and the augmentation of length and diameter of pile lead to decrease the dynamic non-stability region. It is shown that the horizontal reaction force could strength the dynamic stability of pile. It is hoped that these may provide valuable basis for some engineering design.