An analytical method for quantitatively predicting the existing pile behavior induced by adjacent pile driving is of great engineering significance to evaluate the potential influence of adjacent pile penetration on existing piled buildings. In this paper, a simplified two-stage approach is employed to derive the vertical and lateral responses of the existing pile during adjacent pile installation. First, the free-field soil movement due to pile penetration is estimated by an improved source-sink imaging technique considering the existence of the top free surface. The validity and accuracy of this calculation approach are subsequently examined via comparison with published studies. Second, the shear-displacement method and improved Pasternak foundation model incorporating the impact of lateral soil displacement are introduced to investigate the pile-soil interaction. Moreover, based on the Randolph-Worth logarithmic attenuation function and Mindlin’s solution, the pile group response considering the shielding effect of piles is analyzed. Finally, the present solution for a single pile response is validated with the existing theoretical solution and the simulation solution, and extensive parameter studies are conducted to systematically discuss the variation of the behavior of the existing single pile and pile group.

一种定量预测相邻打桩引起的既有桩行为的分析方法，对于评估相邻打桩对既有桩建筑物的潜在影响具有重要的工程意义。在本文中，采用简化的两阶段方法来推导相邻桩安装期间现有桩的垂直和横向响应。首先，考虑到顶部自由表面的存在，通过改进的源汇成像技术估计由于桩穿透引起的自由场土壤运动。随后通过与已发表的研究进行比较来检验这种计算方法的有效性和准确性。第二，引入剪切位移法和改进的 Pasternak 地基模型，结合横向土壤位移的影响来研究桩土相互作用。此外，基于Randolph-Worth对数衰减函数和Mindlin解，分析了考虑桩身屏蔽效应的桩群响应。最后，通过现有理论解和模拟解验证了单桩响应的当前解决方案，并进行了广泛的参数研究，以系统地讨论现有单桩和群桩行为的变化。