Load transfer mechanism of tubular pile is not expatiated completely because of the complex mechonism of soil core, which restricts the development of the theory for the bearing capacity of pile and its practiceal application.

• 筒桩具有与一般的灌注或沉管实心桩不同的荷载传递机理，筒桩的荷载传递机理的复杂性制约了筒桩承载理论的发展与工程应用，其工程设计方法至今仍处于半理论半经验的状态。