岩土力学2017，Vol.38Issue(10)：2817-2825,9.DOI:10.16285/j.rsm.2017.10.006
考虑三维波动的饱和土中管桩群桩的水平振动研究
Horizontal vibration of pipe pile groups in saturated soil considering three-dimensional wave effects
摘要
Abstract
The horizontal vibration of the pipe pile groups in saturated soil is studied by considering three-dimensional wave effects on the saturated soil,and the horizontal dynamic impedance of pipe pile groups is also obtained.The soil around pile and pile core soil are considered as two-phase saturated soil,and the mechanical property of the saturated soil is described by the theory of porous medium.The horizontal dynamic impedances of the saturated soil around pile and in pile core are obtained by using the mathematical physics means.Using the wave spread theory and superposition principle,the horizontal force of any pipe pile is obtained by considering boundary conditions and orthogonality of trigonometric functions.The horizontal dynamic impedances of pipe pile groups in saturated soil is obtained by considering the displacement compatibility conditions and horizontal force equilibrium conditions at pipe pile top at rigid cap.The influences of physical parameters on the dynamic characteristics of pipe pile groups in saturated soil are analyzed and discussed by using 2×2 pipe pile groups as an example.The result indicates that there are some differences between the horizontal dynamic impedances of the solid core pile groups and the pipe pile groups.It needs to consider the influence of the difference between the saturated soil around pile and in pile core on the dynamic impedance of pipe pile groups in saturated soil.Length to diameter ratio and wall thickness of pipe pile have great effect on the horizontal vibration of pipe pile groups in saturated soil,showing that the size of pipe pile should be focused in the actual engineering design.关键词
管桩群桩/水平振动/叠加原理/动力阻抗/饱和土Key words
pipe pile groups/horizontal vibration/superposition principle/dynamic impedance/saturated soil分类
建筑与水利引用本文复制引用
刘林超,闫启方,闫盼..考虑三维波动的饱和土中管桩群桩的水平振动研究[J].岩土力学,2017,38(10):2817-2825,9.基金项目
国家自然科学基金(No.U1504505) （No.U1504505）
河南省科技发展计划项目(No.142300410200) （No.142300410200）
河南省高等学校青年骨干教师资助计划项目(No.2013GGJS-121) （No.2013GGJS-121）
信阳师范学院南湖学者奖励计划青年项目(No.201506).This work was supported by the National Nature Science Foundation of China (U1504505),the Henan Foundation for Development of Science and Technology (142300410200),the Foundation for Outstanding Young Teachers in Higher Education Institutions of Henan Province (2013GGJS-121) and the Nanhu Scholars Program for Young Scholars of XYNU (201506). （No.201506）
