饱和黏弹性半空间中摩擦桩的竖向振动

Vertical vibration of friction pile in saturated viscoelastic half-space

为深入了解饱和黏弹性半空间地基中摩擦桩的竖向振动特性,基于Boer多孔介质理论,考虑激振频率对摩擦桩桩底土体动刚度的影响,采用平面应变模型并结合桩土接触面的混合边值条件,推导求解得出了饱和黏弹性半空间地基中摩擦桩的竖向动力阻抗模型公式和桩顶速度时域响应解并验证了其合理性。进一步通过参数化对比分析探讨了桩基埋深比和土体渗透系数对所得竖向动力阻抗和桩顶速度时域响应的影响规律。解析推导得出的对应竖向动力阻抗模型公式和桩顶速度时域响应解,丰富了桩基动力学的理论,可为相关工程实践提供参考和理论支持。

Analytical solutions of vertical dynamic impedance and velocity response at pile cap for vibration of friction pile in saturated viscoelastic half‐space foundation were obtained and verified by considering plain strain model and mixed boundary condition of pile‐soil interface as well as effect of excitation frequency based on Boer＇s porous medium theory for a deeper comprehension of its vertical vibration characteristics . Furthermore ,effects of pile depth ratio and permeability coefficient on vertical dynamic impedance and velocity response at pile cap were discussed by parametric comparative analyses .The solutions and results of vertical dynamic impedance and velocity response at pile cap derived diversified the theories of pile dynamics and provided technical references and theoretical support for related engineering practice .