The characteristics of negative skin friction (NSF) with working load on pile top were analyzed.

分析了在桩顶荷载作用下的负摩阻力特性。

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Combined with the previous results and the property of PCC pile, based on Terzaghi consolidation theory, mechanism of negative skin friction of PCC pile has been studied.

结合以往研究实心桩的成果和PC C桩自身的特点，基于太沙基固结理论，探讨了PCC桩负摩阻力作用机理。

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Then, the effect of pile head vertical load value on negative skin friction is analyzed.

对桩顶荷载大小的影响进行了研究。

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