DX桩在承受上拔荷载时，桩土间的相互作用除了桩侧的摩擦阻力外，还有承力盘提供的抗拔阻力，对于桩身的抗拔摩擦阻力的研究有不少成果，但要研究DX桩的抗拔承载力，关键问题在于解决支盘的抗拔阻力计算问题。文章通过对DX桩作为抗拔桩的某工程实例进行分析，运用不同的计算方法对DX抗拔桩的承载力进行计算并与工程实测值进行对比，对不同计算方法进行了讨论研究，并试着探求一种新的计算方法。

When the DX-pile is under uplift load, the pile-soil interaction consists of pile shaft resistance and uplift resistance provided by the bells which effectively raises the uplift-pile ultimate bearing capacity. The friction resistance along pile shaft friction has been study well and has lots of results, but the problem of calculating the resistance of bell is still under studied which is the key to DX-pile uplift capacity. This paper calculates the bearing capacity of DX-pile and compares it with the measured value on the basis of a project to discuss and study these calculation methods, and a new method of calculation is also proposed.