This work presents an improved approach to consider the effect of any intermediate piles between the two piles in pile groups. Based on the thin ring shear model of concentric cylinder and elastic theory, a multi-pile analysis model under axial load is proposed with full consideration of the mutual reinforcing effect between super-long piles. A theoretical derivation of interaction coefficient and the deformation of super-long pile groups which simultaneously consider the reinforcing effect and the existence of other piles in pile groups was carried out. Example analysis shows that the analytical solution agrees well with the experimental results. In this work, the error between the calculated result of the presented model and the measured value is 25% less than that in the traditional model. The multi-pile model fully analyzes the interaction mode between multiple piles and considers the mutual reinforcing effect among the piles, which makes up for the deficiency in traditional settlement calculation of pile groups. Consequently, the model proposed can accurately reflect the working characteristics of super-long pile groups in actual engineering.

这项工作提出了一种改进的方法来考虑桩组中两个桩之间的任何中间桩的影响。基于同心圆柱体的细环剪切模型和弹性理论，在充分考虑超长桩之间的相互加固作用的基础上，提出了一种轴向载荷下的多桩分析模型。进行了相互作用系数和超长群桩变形的理论推导，同时考虑了群桩的加固效果和其他群桩的存在。实例分析表明该分析溶液与实验结果吻合良好。在这项工作中，所提出模型的计算结果与测量值之间的误差比传统模型小25％。多桩模型充分分析了多桩之间的相互作用模式，并考虑了桩间的相互增强作用，弥补了传统桩群沉降计算的不足。因此，所提出的模型可以准确反映实际工程中超长桩群的工作特性。