近几年公路工程发展迅速，在修筑高等级公路时为了保证道路行驶的平稳性和通畅性，出现了很多填土路堤，由于以前该类工程较少，对路堤沉降特性的研究也较少。采用传统的分层总和法计算得到路堤沉降最大位置位于路堤表面，这与实测结果不符；对此法进行改进，在考虑路堤填土分层填筑时间先后顺序特性的基础上，分别推导出了适用于刚性地基和柔性地基的改进分层总和法计算公式。针对一算例，分别采用此改进方法与数值计算方法进行了计算，结果基本一致。表明在评价路堤沉降时，改进分层总和法可作为一种方便快捷的经验方法。

 As the highway engineering developing rapidly, a lot of high level roads were constructed. To improve the mobility of the road, much soil-filled embankments were built. There was little research on the settlement of the embankments. The result of the embankment settlement, which was calculated by the ordinary layering summation method, is different from the monitored data. On the basis of the layering fill characteristics of the embankment, we improve the layering summation method that can be applied to rigid and soft base. A numerical example was calculated in comparison the improved method with the numerical calculation method, and the results were basically in accordance. The results indicated that the improved layering method can be a simple empirical method to calculate the settlement of the embankment.