Longitudinal vibration characteristics analysis on floating pile in frequency domain based on virtual saturated soil pile model

被引：3

作者：

Cui C. ^{[1
,2
]}

Meng K. ^{[1
]}

Liang Z. ^{[1
]}

Xu C. ^{[2
]}

Yang G. ^{[1
]}

机构：

[1] Transportation Engineering College, Dalian Maritime University, Dalian

[2] Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2019年 / 49卷 / 02期

关键词：

Dynamic impedance; Longitudinal vibration; Plane strain; Saturated virtual soil pile; Soil beneath the pile toe;

D O I：

10.3969/j.issn.1001-0505.2019.02.022

中图分类号：

学科分类号：

摘要：

To study the longitudinal vibration characteristics of floating pile in saturated soil, a saturated virtual soil pile model based on Biot's theory of wave propagation was proposed. The analytical solution for the displacement of saturated soil was derived by the Novak plane strain method. Then, the vertical dynamic impedance at the pile head was obtained by adopting the saturated soil-pile-saturated virtual soil pile completely compatibility condition. The extensive parametric analysis was performed to investigate the effects of the parameters of the saturated soil on the vibration characteristics at the pile head. The computational results show that when the thickness of the saturated soil layer beneath the pile toe is 4 and 6 m, the alternating phenomenon of large and small peaks is presented, which is different from the calculation results of the single-phase virtual soil pile model, and the influence of porosity of saturated soil beneath the pile toe and surrounding soil on the dynamic impedance curve at the pile head cannot be ignored. The single-phase virtual soil pile model of soil can lead to considerable errors when the saturation of soil layers beneath the pile toe is remarkable and the drainage is poor. The saturated virtual soil pile model and the relevant analytical solution are more suitable for analyzing the longitudinal vibration characteristics of floating pile. © 2019, Editorial Department of Journal of Southeast University. All right reserved.

引用

页码：356 / 361

页数：5

共 17 条

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