该文讨论了灰色系统理论在软土路基沉降量预测中的应用 ,以京珠高速公路灵山试验段沉降观测数据为例 ,建立了沉降量灰色预测模型 ,并与三点法、双曲线法的预测结果以及实测结果进行了对比 ,结果表明 ,灰色预测模型的预测沉降量与实际沉降量更接近。最后分析了用灰色模型进行预测应注意的问题 This paper discusses the application of gray system theory in predicting settlement of soft soil roadbed. Taking the settlement observation data of Lingshan test section of Beijing-Zhuhai Expressway as an example, a gray prediction model of settlement is established and compared with three-point method, hyperbolic method The results of the prediction and the measured results are compared. The results show that the prediction of gray prediction model is close to the actual settlement. Finally, the problems that should be noticed when using gray model to predict are analyzed