The calculation formula is proposed based on the results of bond strength of new and old concrete,which can estimate the ultimate capacity of connections between prestressed concrete pipe pile and pile cap.

• 最后,根据新老混凝土粘结性能的研究成果,对预应力混凝土大管桩与桩帽混凝土连接节点极限轴拔承载力计算给出了建议计算公式,与试验结果吻合较好。