[提要]  通过试验和理论分析，以及对一些工程实例的比较，对挤扩支盘桩的承载性能进行了研究，证明其性能价格比远好于普通灌注桩，是一种技术经济效益十分显著的桩型。同时，文中还提出了影响该桩型承载性能的因素，指出了目前承载力计算中存在的不足和有待进一步改进的地方。
[关键词]  挤扩支盘桩  承载性能  工程应用  荷载试验

Through tests, theoretical analysis and the comparisons of some engineering examples, this paper focuses on the bearing property of cast-in-place pile with branches and plates, and demonstrates that it has better cost performance ratio than common cast-in-place pile. Accordingly, it has distinct benefits in technology and economy. It also points out the influential-factors in bearing property of this kind of pile, and mentions the disadvantages of calculation in bearing capacity and the aspects which should be improved.
Keywords: variable-diameter pile; bearing property; engineering application; loading test