中文摘要：

提出了相对加固程度和相对深度的概念。利用前人工程实测资料，运用统计学方法，分别建立了黄土地基强夯后，干重度的相对加固程度和孔隙比的相对加固程度随相对深度变化的最佳拟合方程及上下限方程。并用实例对所建立的方程进行了验证。结果表明，计算结果与实测结果较吻合。方程的建立为夯前定量预估黄土强夯加固效果的深度变化提供了一种实用途径。

英文摘要：

In this paper the concept of relative degree of improvement and relative depth are put forward. Based on the data obtained from practices of dynamic compaction and the methods of statistics, empirical equations and boundary equations of both relative degree of dry unit weight improvement changed with relative depth and relative degree of void ratio improvement changed with relative depth are presented. Finally, the equations are verified by several project examples, and the results show that the calculated results agree well with experimental results. These equations provide a practical way for the prediction of reinforcement effect change with depth of loess ground during dynamic compaction.