大直径超长单桩竖向承载性能离心模型试验研究  

Centrifugal Model Test Study of Axial Bearing Behavior of Large Diameter and Very Long Single Pile

作　　者：游庆仲[1] 王年香[2] 章为民[2] 

机构地区：[1]江苏省苏通大桥建设指挥部,江苏南通226009 [2]南京水利科学研究院,江苏南京210024

出　　处：《桥梁建设》2006年第1期1-4,共4页Bridge Construction

基　　金：江苏省交通科学研究计划项目(04Y029)

摘　　要：通过单桩离心模型试验,获得了荷载与沉降关系曲线、桩身轴力分布,研究了大直径超长桩在竖向荷载作用下,桩侧摩阻力、桩端阻力、桩身压缩变形等变化规律,分析了桩端注浆对承载特性的影响,验证了设计参数。The load-settlement curves and distribution of pile shaft axial force of a large diameter and very long single pile are obtained through centrifugal model tests for the pile. The laws of variations of pile side friction resistance, pile tip resistance and compression-induced pile shaft deformation thereof under axial load are studied, and the effect of grouting at pile base on the bearing behavior of the pile is analyzed. Eventually, the related design parameters are verified.

关 键 词：桥梁基础 钻孔灌注桩 大直径超长桩 承栽特性 离心模型 试验 

分 类 号：U443.154[建筑科学—桥梁与隧道工程]