预应力混凝土管桩与桩帽连接节点轴拔性能试验研究

Test Study on the Axially Pulled Capacity of Prestressed Concrete Pipepile - Pilecap Connection Joints

采用直径为550mm的预应力混凝土管桩的九个试件,对桩与桩帽连接节点的轴拔承载力进行了试验研究,讨论了桩与桩帽的连接型式、连接节点的破坏状态、破坏机理以及受力特性.在试验研究的基础上给出了连接节点轴拔承载力的建议公式和确定管桩埋入桩帽深度的计算方法,并建议了在实际工程中应采用的连接型式.

Using prestressed concrete pipepile with 550mm diameter, the axially pulled capacity of plie-pilecap connections is studied by testing nine members. Pile-pilecap connection types, the failure form of connections, failure mechanism and tension character are discussed. Some formulae for calculating the axially pulled capacity of connection and determining the embedded length of pilebody in pilecap are proposed based on the tests, at the end a reasonable connection type is proposed for engineering.