增强型预应力管桩与普通预应力管桩单桩抗拔静载试验的对比分析

摘要

通过对同场地、同强度、等外径的两根普通预应力管桩和两根增强型预应力管桩进行现场单桩抗拔静载试验，对比分析了U-啄(上拔荷载-上拔量)曲线和受力特征。试验结果表明，增强型管桩的U-啄曲线比较平缓，抗拔承载力比普通管桩提高70.53%，抗拔能力更理想。%Based on the static uplift loading test of four piles (two enhanced prestressed concrete piles and two ordinary prestressed concrete piles) with same external diameter and strength in the same place, their U (load)~δ (ascending displacement)curves and load transmission mechanism are analyzed comparatively. The results show that the U~啄 curves of the enhanced prestressed concrete piles have a gentler gradient, and their ultimate bearing capacities are 70.53%higher than those of the ordinary piles, so their uplift capability are more discerning.