田再琦  武秀彦  王正秋
    （哈尔滨建筑大学建筑设计研究院 150006）

[提要]  结合工程实践，在同一场地进行四组（其中纯摩擦一组，端承一组，摩擦端承综合二组）大直径扩底桩极限承载力原型试验，以确定单桩竖向承载力设计参数，并对摩擦端承桩型的受力机理进行了分析研究。
[关键词]  挖孔扩底桩 原型试验 极限承毅力

Ultimate strength of the large diameter pile with bulb shaped base is tested in a site of a practical engineering. The tests include a group of pure friction piles, a group of end bearing piles and two groups of piles with both friction and end bearing. Designing parameters of the longitudinal strength are determined. Also, the behaviors of the friction and end bearing pile are analysed.
Keywords: pile with bulb shaped base; test in site, longitudinal ultimate strength