工程地质学报2016，Vol.24Issue(3)：398-408,11.DOI:10.13544/j.cnki.jeg.2016.03.009
开口管桩高频振动贯入过程的 ALE 有限元分析
ALE FINITE ELEMENT ANALYSIS ON PENETRATI ON PROCESS O F OPEN-ENDED PIPE PILES DRIVEN WITH HIGH FREQUENCY HAMMERS
摘要
Abstract
Arbitrary Lagrangian-Eulerian ( ALE) methods couple the advantages of Lagrangian and Eulerian methods, and avoid the mesh distortion problem of Lagrangian method of general finite element .The methods can effectively analyze the penetration process of open -ended pipe piles driven by high frequency hammers .Based on ALE finite element methods, the finite element model of full penetration process of open -ended pipe piles driven by high frequency vibratory hammers is built .The paper studies in detail squeezing effect , frictional resistance and soil plugging effect during pile-sinking.The computational results show that the compacting stress mainly spreads along the horizontal direction, and the compacting stress in deep soil layers is larger than compacting stress in shallow soil layers.The horizontal compacting displacements increase with the increase of penetration depth .But the maximum compacting displacement delays penetration depth .The affecting range of squeezing effect is approximately 10 times pile diameter.So it is necessary to put great emphasis on full penetration process of pipe pile .Outside friction resistance of piles increases linearly with the increase of penetration depth .Inside friction resistance of piles increases nonlinear with the increase of penetration depth .The growth rate increases gradually with the increase of penetration depth.Soil plugs of pipes are incompletely plugged conditions .Degree of soil plugs varies from unplugged conditions to partially plugged conditions .Furthermore, the influence of soil elastic modulus, frictions, vibration frequencies and pile diameters on the compacting displacements are investigated .关键词
开口管桩/高频振动/ALE 方法/有限元Key words
Open-ended pipe pile/High frequency vibration/Arbitrary lagrangian-eulerian method/Finite element method分类
建筑与水利引用本文复制引用
肖勇杰,陈福全,林良庆..开口管桩高频振动贯入过程的 ALE 有限元分析[J].工程地质学报,2016,24(3):398-408,11.基金项目
国家自然科学基金项目（41272299）资助． （）
