浅析挤扩多盘桩单桩竖向抗拔承载力

通过研究挤扩多盘桩的现有抗拔承载力计算方法，提出利用传统模式来计算挤扩多盘桩的抗拔承载力的不足之处，并根据挤扩多盘桩在竖向拔力作用下的土体的破坏特征和桩的受力机理，提出最新的挤扩多盘桩抗拔承载力的计算模式，为该型桩的设计应用提供可靠的理论依据。

ANALYSISON THE PUSH-EXTEND MULTI-UNDER-REAMED PILE BEARING CAPACITY OF SINGLE PILE PULLED ON VERTICAL LOADS

By studying the existing calculation method of pulled out of the bearing capacity of the push-extend multi-under- reamed pile, this article put forward deficiencies of the traditional mode to calculate the bearing capacity of the push-extend multi-under-reamed pile, and according to the push-extend multi-under-reamed pile under vertical pull force the characteristics of the soil destruction and working mechanism of pile, put forward the newest calculation method of pulled out of the bearing capacity of the push-extend multi-under-reamed pile, the reliable theory basis will influence the application of the expansion multiple disk pile.