The action point of uplift force plays a dominant role in the distribution of friction resistance along uplift piles,and thus it is a key factor in the analysis of the loaddisplacement relationship of uplift piles.

• 上拔力作用点位置对抗拔桩摩阻力分布有决定性影响,是分析抗拔桩荷载变形机理的关键性因素。