Abstract This paper develops an analytical approach to estimate the long-term load-displacement behaviors of jacked piles in clayey soils. Apart from considering the effects of pile installation, subsequent re-consolidation and loading, the proposed approach properly considers the effects of soil aging on the long-term behavior of the surrounding soil so as to determine the load-displacement response of the jacked pile in the long run. An elastic-viscoplastic soil model is incorporated into the load transfer method to predict long-term soil properties. The comparison between the predictions from the presented approach and the data measured from the field pile loading test shows the validity of the proposed method. Parametric studies are conducted to illustrate the effects of the in-situ overconsolidation ratio, internal friction angle and the secondary consolidation coefficient on the long-term load-displacement behaviors of old piles. Results show that the proposed approach not only is capable of predicting the short-term set-up of jacked piles, but also could yield reasonable long-term load carrying behavior. The three parameters pertaining to the strength and stiffness of soil have significant impacts on the long-term load-displacement curve of the pile.

中文翻译：

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粘土中顶桩的​​沉降：考虑土壤老化的理论分析

摘要 本文开发了一种分析方法来估计黏性土中顶进桩的长期荷载-位移行为。除了考虑桩的安装、随后的重新固结和加载的影响外，所提出的方法还适当地考虑了土壤老化对周围土壤长期行为的影响，从而确定了顶进桩的荷载位移响应。从长远来看。将弹性-粘塑性土壤模型纳入荷载传递方法以预测长期土壤特性。所提出方法的预测与现场桩荷载试验测量的数据之间的比较表明了所提出方法的有效性。进行参数研究以说明原位超固结比的影响，内摩擦角和二次固结系数对旧桩长期荷载位移行为的影响。结果表明，所提出的方法不仅能够预测顶进桩的短期设置，而且可以产生合理的长期承载行为。与土的强度和刚度有关的三个参数对桩的长期荷载位移曲线有显着影响。