Study on Reinforcement Mechanism and Reinforcement Effect of Saturated Soil with a Weak Layer by DC

This paper presents a numerical investigation on the improvement mechanism of dynamic compaction (DC) in saturated soil weak layer with high levels groundwater, using an improved fluid–solid coupling method Drucker–Prager–Cap model. The model is verified by comparing published test data at first, which show that dual-phase can approximately reflect development law excess pore water pressure and effect layered foundation under DC. Then, based model, influences thickness depth as well tamping energy dissipation pressure, effective stress, relative degree reinforcement during DC were investigated. results showed embedment interlayer may greatly affect Meanwhile, groundwater table also play great role should be lowered dewatering or adding drainage to achieve better