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，给出了砂土强夯后静力触探所得的比贯入阻力随深度变化的概化模式．根据概化模式提出了变化模式公式．并通过对工程实例进行拟合，得出了公式中的参数，确定了变化模式方程．最后，用两个实例对所建立的方程进行了验证；结果表明，计算结果均与实测结果较吻合．方程的建立为夯前定量预估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 of both relative degree of the specific penetration resistance of static penetration test 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 and the change in depth of sandy soil ground after dynamic compaction.