群桩效应（Group Piles effects ）在高层建筑基础设计时不能不考虑的就是群桩效应，群桩效应就是指群桩基础受竖向荷载后，由于承台、桩、土的相互作用使其桩侧阻力、桩端阻力、沉降等性状发生变化而与单桩明显不同，承载力往往不等于各单桩承载力之和这一现象。
群桩效应系数 pile group effect coefficient
Using the finite element software ANSYS,the article calculates and analyses the behavior capacity of pile groups first. It discusses the influence factors of pile groups effect,such as pile space,pile number,pile diameter,pile length and soil parameter etc.
本文首先运用目前国内外应用较为广泛的有限元软件ANSYS对群桩基础进行有限元分析：分析了横向荷载作用下群桩的桩距、桩数、桩径、桩长、土体模量等因素对群桩效应的影响，得出了一些有益的结论。
参考来源 - 横向承载群桩的有限元计算分析At the same time, some different coefficients of pile group effect are adopted to calculate. Compared with these results, the feasibility and conciseness of this reduced coefficient are testified.
同时本文还采用了不同的群桩效应系数对该群桩基础进行了计算，并将这些计算结果进行对照分析，证明了本文给出的折减系数的可行性和简便性。
参考来源 - 大直径钻孔灌注桩群桩效应非线性分析Considering group pile effect or not and ratio of pile space to pile diameter can infect group pile foundation seismic performance greatly through analysis. Considering group pile effect is necessary during reality analysis.
分析群桩效应对群桩基础抗震性能产生的影响,可知群桩效应考虑与否及桩距与桩径比值都能产生较大影响,在实际分析中,应在模型中考虑群桩效应。
参考来源 - 桥梁群桩基础的抗震性能研究This kind of pile-group foundation have the characteristics of super-long、great-diameter、small-distance and large number, so the problem of pile-group effect is serious. But people's research and understanding of the pile-group foundation far behind the engineering practices.
这类桩基础具有超长、大直径、桩距小、桩数多的特点，群桩效应问题突出，而人们对于这种基础的认识和研究却落后于工程实践。
参考来源 - 大直径超长钻孔灌注桩群桩效应的三维非线性有限元分析·2,447,543篇论文数据，部分数据来源于NoteExpress
减小井距可节约工程费用，但会引起群桩效应而导致拒锤现象发生。
Reducing well spacing can economize project cost, but it will cause group pile effect and bring on the phenomenon of repelling hammering.
根据附加应力叠加原理，逐步推导得到不同布桩形式的群桩效应系数计算公式。
The formula for effect coefficient of piles group were solved gradually under different shape of laying-out piles according to principle of additional stress superposition.
在进行群桩模型试验研究过程中，作者发现实测群桩效应系数与规范表中相应的数值存在较大差异。
In the course of studying on pile group under its model test, it is discovered th at the measured value of effect coefficient of pile group is larger than that in the codes table.
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