打入桩在受压和受拉工作状态中,周围土体对桩的侧摩阻力是不同的。一般,受拉桩的承载能力应根据拔核试验直接来确定。如果缺乏进行拨桩试验的条件,则需根据压桩试验所得结果或经验公式估算所得桩的极限承载能力分别乘以相应的折减系数来间接求取之。在海港码头结构设计手册和送审的桩基规范(以下简称规范)中规定,受拉桩桩 Driving pile in the compression and tension state, the surrounding soil on the pile side friction is different. In general, the carrying capacity of tensioned piles should be directly determined based on the nuclear test. If there is a lack of conditions for piling test, the ultimate bearing capacity of piles obtained according to the results of piling test or empirical formula should be multiplied by the corresponding reduction factor respectively. In the design manual of the harbor terminal structure and the draft of the pile foundation (hereinafter referred to as the specification), the tensioned pile