伸出地面上基桩的动力稳定性研究

Analysis of dynamic stability of foundation pile stretching out of ground

基于Hamilton原理,导出了桩在轴向动力荷载下的激振频率计算式,分析了伸出地面上基桩的动力稳定性问题,探讨了桩端不同约束、桩长比、桩径、地基土水平抗力和激振频率等参数对桩动力稳定性的影响,结合实例,分析了桩在不同桩端约束条件下桩的动力不稳定区域的差异。

Based on principle of Hamilton,the formulas to calculate exciting frequency of piles under axial dynamic load are derived.The problems of dynamic stability of foundation pile stretching out of ground are studied. The effects of different restriction of pile end,pile length ratio,pile diameter ,horizontal resistance of soil and exciting frequency on dynamic stability of foundation pile are discussed.The distinction of dynamic nonstability area of piles under different restriction condition at pile end are studied.