大直径开口钢管桩竖向承载机理

Vertical bearing mechanism of large-diameter open-ended steel pipe piles

大直径开口钢管桩因土塞形成闭塞效应以及挤土效应降低,其竖向承载机理远比预制混凝土打入桩复杂。以某港口工程大直径开口钢管桩试桩结果为基础,结合现行港口工程桩基规范,研究大直径开口钢管桩竖向承载机理,从受力和承载性状入手,分析大直径开口钢管桩桩径对闭塞效应、挤土效应降低对侧摩阻力、以及闭塞效应对桩端阻力的影响。

Due to the plugging effect and the discount of the soil squeezing effect, the vertical bearing mechanism of large diameter open-ended steel pipe piles is far more complex than that of precast concrete driven pile.Based on the results of the test piles project of large-diameter steel pipe piles of a certain harbor engineer, combined with the current cod for pile foundation of harbor engineering, this paper studies the vertical bearing mechanism of large diameter open-ended steel pipe piles.