摘要
为了解带帽PTC型刚性桩在处理深厚软土地基的工作性状,在某绕城高速公路两试验区进行现场足尺试验,研究了在不同地质条件下带帽刚性单桩的荷载沉降、桩身轴力、桩侧摩阻力、地表土应力及桩土荷载分担比等性状的变化规律。研究表明:带帽长桩较带帽短桩易于控制地基沉降变形和增强地基承载力,土层条件的差异对桩的极限承载力、地表土应力和桩土荷载分担比有着较大的影响。试验研究成果有助于建立带帽刚性桩计算模型,优化工程设计。
In order to investigate the working properties of the PTC rigid pile with cap which deals with deep soft soil, this paper studied the variation of load settlement, axial force, side friction resistance, surface soil stress, pile-soil load sharing ratio and other properties in different geological conditions by the full-scale test in two ring expressway test areas. The results showed that long rigid single pile with cap can control the foundation settlement deformation and enhance the foundation bearing capacity more easily than the short one, difference in soil conditions has a greater impact on the maximum load-bearing capacity, surface soil stress and pile-soil load sharing ratio, which are beneficial to establish the calculation model of rigid pile with cap and optimize engineering project.
出处
《铁道建筑》
北大核心
2012年第10期101-104,共4页
Railway Engineering
基金
江西省研究生创新基金项目(YC10A109)
关键词
带帽刚性单桩
现场试验
工作性状
地质条件
PTC rigid single pile with cap
Field test
Working properties
Geological conditions
