CFG单桩复合地基室内模型试验研究  

Experimental Study on Indoor Model of CFG Single Pile Composite Foundation

作　　者：段晓沛[1] 曹新文[1] 司文明[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《路基工程》2011年第2期90-92,95,共4页Subgrade Engineering

基　　金：厦门市建设系统2008年度科技计划项目

摘　　要：利用几何相似准则,建立CFG单桩复合地基室内模型,通过平板载荷试验,分析不同褥垫层厚度在荷载作用下桩身轴力随深度的分布特征,总结了荷载沿桩身传递的一般规律,得出了桩身不同深度处桩侧摩阻力作用的发挥规律。并通过对比分析得出不同褥垫层厚度桩端阻力、桩土应力比随荷载的变化规律,进而为CFG桩复合地基在沿海地区吹填土加固中的广泛应用提供依据。Indoor model of CFG single pile composite foundation is established using geometric similarity.Through plate loading test,the distribution characteristic of pile axial force along length under load of different thickness of cushion is analyzed.The general rule of load transfer along pile length is summarized and the rule of lateral frictional resistance along pile length is obtained.The change rule of pile tip resistance and pile-soil stress ratio with load of different thickness of cushion is obtained through comparison analysis,which provides evidence for wide application of CFG pile composite foundation in hydraulic soil reinforcement in coastal areas.

关 键 词：CFG桩 褥垫层 桩身轴力 桩土应力比 

分 类 号：TU458.4[建筑科学—岩土工程]