摘要
基于层状地基中横向受荷桩力学模型,利用分离变量法,求得不同地层条件下横向受荷桩的位移方程.运用数值计算方法,分析了软土层物理特性(弹性模量、泊松比、厚度)及分布特征等对桩基力学特性的影响.结果表明:横向受荷桩的桩身变形和内力均随软土层弹性模量增大而减小,而软土层泊松比则对桩基力学特性影响很小;软土的分布特征对桩基力学特性影响显著,与软土处于层状地基中部相比,上层为软土的地基中桩端变形和最大内力均增加2倍;随上部软土层厚度增大,桩基横向位移增大,而其最大弯矩和负剪力则呈现先增后减的趋势.
Based on the mechanics model of a laterally loaded pile in a layered foundation,the displacement equation of the pile foundation with different foundation conditions is obtained with the method of separation of variables.By means of numerical calculation,the effects of the physical parameters(elastic modulus,Poisson’s ratio,and soil thickness)and distribution of the soft soil on the mechanical properties of the pile foundation are analyzed.The numerical results show that the displacement and internal force of the laterally loaded pile decrease with the increase of the elastic modulus of soft soil.Meanwhile,it is very weak that the influence of the Poisson’s ratio of soft soil on the mechanical properties of the pile.The effect of soft soil distribution on the pile is significant.Compared with the pile in layered foundation with the soft soil in middle layer,the top displacement and the maximum internal force of the pile in layered foundation with the soft soil in top layer increase twice times.Moreover,with the increase of soft soil thickness,the displacement of the laterally loaded pile increases,while the maximum bending moment and negative shearing force of the pile show a trend of increasing first and then decreasing.
作者
秦紫果
马建军
王满
刘丰军
QIN Ziguo;MA Jianjun*;WANG Man;LIU Fengjun(School of Civil Engineering,Henan University of Science and Technology,Henan Luoyang471023,China)
出处
《河南大学学报（自然科学版）》
CAS
2020年第2期245-252,共8页
Journal of Henan University:Natural Science
基金
国家自然科学基金资助项目(11502072,51474095)
洛阳市轨道交通1号线科研项目(LYGD1-ZX-HYFW-(2017)118-chlscky).
关键词
横向受荷桩
改进Vlasov地基模型
层状地基
软土特性
土层分布
laterally loaded pile
modified Vlasov foundation model
layered foundation
soft soil properties
soil distribution
作者简介
秦紫果(1993-),女,河南洛阳人,硕士研究生.研究方向:桩-土相互作用研究;通信作者:马建军,E-mail:majianjun@haust.edu.cn
