桩端土特性与桩侧阻力关系的有限元分析  

Finite Element Analysis of Relationship between Soil Characteristics at Pile End and Resistance of Surface of Piles

作　　者：李前[1] 王来义 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州工业学院学报》2015年第2期12-14,共3页Journal of Lanzhou Institute of Technology

摘　　要：桩端阻力和桩侧阻力不是相互独立的,桩端土特性不同将影响桩侧阻力的发挥.通过有限元软件进行数值分析,研究了不同桩端土特性对桩侧阻力的影响.结果表明:提高桩端土的强度不仅可以减小桩端沉降,还可以使桩身总侧阻力提高;桩端强度的提高会提高桩侧阻力,尤其是桩端附近桩侧摩阻力;同时,从桩端部位土体随荷载增加位移发展过程的角度,对增强效应机理进行解释.The resistance at lateral surface of piles and the end of piles are not independent. The characteristics of the pile end will affect the resistance of lateral surface of piles. By using the finite element method,such influence is researched. It turns out,that the enhancement of soil strength can reduce the settlement at the pile end and increase the total shaft resistance. The resistance of lateral surface,especially the surface near the pile end will increase with the soil strength at the pile end. Meanwhile,we also explain the enhancing mechanism from the process of the displacement of soil around a pile end with the increasing of load.

关 键 词：桩端土特性 桩侧阻力 有限元分析 

分 类 号：TU473[建筑科学—结构工程]