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传统观念认为，在单夯夯击能２０００ｋＮ·ｍ情况下，强夯法仅对浅部地基土层具有加固作用，而对深部土层却没有加固作用。通过浦东机场强夯地基与天然地基沉降观测资料的对比分析，认为：强夯不仅可加固浅部土层，而且也可加固深部（１０ｍ以下）的饱和软土，有效加固深度可达２０ｍ左右。
The traditional view is that under the condition of single-knocking energy of 2000 kN·m, the dynamic compaction method only has the effect of strengthening the shallow foundation soil, but it does not reinforce the deep soil layer. Based on the comparative analysis of the settlement observation data of strong foundation and natural ground in Pudong Airport, it is concluded that strong ramming can not only reinforce the shallow soil layer, but also strengthen the deep (less than 10m) saturated soft soil, and the effective reinforcement depth can reach about 20m.