中文摘要：

强夯与静载是加固地基的两种方式,但其作用的机理与过程是不同的.为了对比分析两种作用下地基土体的加固效果,考虑土体的材料与几何非线性,采用FLAC3D程序,建立强夯冲击和静载作用下地基的数值模型,对比分析地基土体内部位移场、应力场及密度等参数的变化规律.结果表明：产生相同的地表坑深所需的冲击应力峰值要明显高于所需的静载数值,冲击作用的竖向应力和竖向位移衰减快于静载作用,静载作用有效加固深度和地表加固宽度均要要大于冲击作用,冲击作用加固效果在浅层弱于静载作用、中部高于静载、深部两者趋同.研究成果深化了强夯与静载作用时地基内部响应的认识,探讨了分析强夯等动力荷载加固地基效果的新途径.

英文摘要：

Dynamic compaction and static load are two methods of ground stabilization, but their action mechanisms and processes are different. In order to analyze the consolidation effect of foundation soil under the two kinds of loads, the material and geometrical nonlinearity of the soil was taken into account, the FLAC3D program was adopted, the numerical model of foundation under the two kinds of loads was established, the change law of displacement field, stress field and density in the foundation soil was contrastively analyzed. Results show that the impact stress peak is apparently higher than that of the static load if they lead to the same pit depth; the attenuation velocity of the vertical stress and vertical stress of the impact effect are faster than that of the static load; the effective reinforced depth and breadth of the static load are greater than that of the impact effect; compared with the static load, the impact effect has a weaker consolidation effect in the superficial layer of the foundation, and greater in the middle layer, the same in the deep layer. Research results deepen the knowledge of the response in the foundation under the dynamic compaction and static load, and discuss a new way of analyzing the consolidation effect of the foundation under the dynamic compaction.