【摘要】 讨论了夯坑地面沉降特征，夯击时贯入度大以及在第Ⅱ阶段贯入度衰减缓慢、地面无明显隆起等是夯能充分发挥的反映，强夯地基有双层构造，上层（A层）为强烈夯实层，下层（B层）为弱夯实层，后者受到低周期低幅值动应力作用而收到抗振动稳定性提高的强夯加固效果。更多还原

【Abstract】 In this paper, the features of surface settlement of dgnamic compacted subgrade is discussed. The penetration of hammr is large at the beginning and then decreases gradually in the second stage of compaction- No obvious heaving of soil sndace indicates the compacting energy is fully mobilized. Double-layer formation is formed by dynndc compaction. The upper layer (A layer) has been violently compected while the lower one (B layer) which is subjected to dynndc action of low frequency and low amplitude, is only slightly compacted so that its anti -vibration stability is increed.更多还原