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。
The negative skin friction resistance caused by collapsible deformation after water soaking into collapsible loess will reduce the vertical bearing capacity of piles.
实例分析表明，由于桩侧负摩阻力的影响，单桩承载力大为降低。产生负摩阻力的土层，不宜采用端承型桩基。
The greatly reduced capacity of a single pile resulting from the negative friction leaves the end-bearing pile unsuitable in the backfilling soil.
阐述了桥梁桩基负摩阻力产生的原因，分析了桩基中性点位置确定、负摩阻力计算等问题，并提出了十条有效减少负摩阻力的措施。
This paper expatiates on the causes of negative frictional resistance which may appear on bridge piles, analyses the calculation methods and gives ten methods reducing it.
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。
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。
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.
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