预制变径节桩（PHB）单桩承载力试验分析

摘要

By adopting static load test method,we respectively test the compression and uplift bearing capacity of cyclically change diameter pile(PHB)and prestressed pipe pile(PHC)pile,to study the mechanism of cyclically change diameter pile(PHB)bearing capacity. The results show that under the condition of silty soil in Xinzheng area,PHB pile compression and uplift bearing capacity of less than PHC pile,but PHB pile uplift factor is greater than PHC piles. Related results can provide a reference for the PHB pile design.%通过对变径节桩（PHB）和普通预应力混凝土管桩（PHC）单桩抗压、抗拔静载荷试验成果比较分析，研究了变径节桩的承载力作用机制。结果表明，在新郑地区粉土条件下，变径节桩（PHB）抗压、抗拔承载力均小于PHC桩，但变径节桩抗拔系数大于PHC桩。相关成果可为变径节桩（PHB）设计提供参考。