针对三点法与灰色GM(1,1)模型在沉降预测中的优势与不足,该文结合组合模型的构建理念,提出误差平方和最小的三点法-灰色GM(1,1)组合模型的预测方法。最后通过在实验中分析相关系数和预测误差,将组和模型预测和单预测模型进行对比,结果表明该方法能较好用于某铁路客运专线路基的沉降预测,为相关研究提供参考。 Aiming at the advantages and disadvantages of the three-point method and gray GM (1,1) model in settlement prediction, this paper proposes a three-point gray GM (1,1) combination model with the smallest sum of squares error Prediction method. Finally, by comparing the correlation coefficient and prediction error in the experiment, the comparison of group and model prediction with single prediction model shows that the method can be used to predict the settlement of a railway passenger dedicated subgrade and provide reference for related research.