福州大学学报（自然科学版）2011，Vol.39Issue(2)：287-292,6.DOI:CNKI:35-1117/N.20110402.1001.008
高频液压振动沉桩的颗粒离散元分析
DEM study on the installation of a pile using the high frequency hydraulic vibratory hammer
摘要
Abstract
Using particle discrete element method (DEM), the factors influencing the pile penetration depths in the course of the installation of a pile using the high frequency hydraulic vibratory hammer are analyzed. The change in the velocity field of sand and contact stress field when the pile penetrating the different depths is studied. Numerical simulation results show that the pile penetration depth increases when the static load and the vibration frequency increase. The variations of the velocity field and contact stress field reveal the mechanisms of the pile shaft frictional resistance and the uplift phenomenon of topsoil. The contact stress of sand increases as the pile is being driven. When the total pile is penetrated in the sand, the porosity of the deep sand reduces, which indicates the high frequency hydraulic vibratory pile driving can densify the deep sand.关键词
高频振动沉桩/颗粒离散元/砂土/贯入深度/孔隙率Key words
high frequency vibratory pile driving/ DEM/ sand/ penetration depth/ porosity分类
建筑与水利引用本文复制引用
韩钧,陈福全,曹琪君..高频液压振动沉桩的颗粒离散元分析[J].福州大学学报（自然科学版）,2011,39(2):287-292,6.基金项目
国家自然科学基金资助项目(50778045) （50778045）
山东省自然科学基金资助项目(ZR2009FM071) （ZR2009FM071）
