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。
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。
Distribution curves of negative skin friction were similar to parabola, as was also found in some field test studies.
负摩阻力分布曲线大致呈抛物线型，与桩基现场浸水试验结果相似。
The test of negative skin friction along the single pile is studied, which is modeled after piles of Zhanjiang harbor.
结合湛江港某码头基桩工程，对桩的负摩擦力进行试验研究。
The test of negative skin friction along the single pile or wharf bent piles, which is modeled after piles of ZanJiang harbor, is studied.
结合湛江港某码头工程基桩，用模型试验模拟现场地质情况，对港口单桩、排架桩基负摩擦力进行模型试验。
The axial force of piles first increases with the depth and then decreases. The variation of negative skin friction with the depth of piles is nonlinear.
由于负摩阻力的作用，桩身轴力随着深度的增加先增大后减小，桩侧摩阻力沿深度呈非线性变化。
The negative skin friction resistance caused by collapsible deformation after water soaking into collapsible loess will reduce the vertical bearing capacity of piles.
湿陷性黄土地区地基土浸水湿陷后，桩侧表面可能产生负摩阻力，将导致桩基承载力降低。
In the engineering project, negative skin friction is the drag force that will reduce the vertical bearing capacity and cause differential settlement of the structure.
工程中由于负摩阻力产生的下拉荷载不仅使桩竖向承载力减小，还会导致结构物的不均匀沉降。
Negative skin friction is one of important problems in design of pile foundation, but the negative skin friction of pile groups considering time effect is less studied.
基桩负摩阻力是桩基础设计中必须考虑的重要问题之一，但是针对考虑土体固结时间效应的群桩负摩阻力研究却相对较少。
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。
Engineering accidents often occur due to negative skin friction in pile foundation engineering. The research on problems of negative skin friction has been paid more and more attention.
工程中，因负摩阻力问题造成工程事故屡有发生，负摩阻力问题相关研究现在越来越受到重视。
Engineering accidents often occur due to negative skin friction in pile foundation engineering. The research on problems of negative skin friction has been paid more and more attention.
工程中，因负摩阻力问题造成工程事故屡有发生，负摩阻力问题相关研究现在越来越受到重视。
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