It is not clear which method of foundation treatment should be adopted to control post-construction settlement and avoid the phenomenon of "bridge head jumping" for the foundation of the bridge head covered by silty soil and silty sand and buried deep in soft soil.This study based on the ring of the hangzhou bay expressway roadbed engineering experience and data and numerical simulation method of joint high vacuum dynamic compaction method, the rotary spray pile reinforcement method (only) under the soft soil and light packing replacement method of three methods for ground treatment, in a variety of different coating thickness, thickness of soft soil cases, applicability and economy comparison analysis.The results show that the post-construction settlement of the roadbed at the bridge head is less than 10cm；When the filling height is 5m and the substratum is less than 10m, the replacement of lightweight filler can meet the settlement requirements;When the soil layer is thick, other foundation treatment methods should be combined;When the overburden is more than 20m, the high vacuum combined dynamic compaction method has better treatment effect;Reinforcement of soft soil with orifice orifice jet grouting pile: the treatment effect of thick overburden bridge head is very good, satisfying the requirement when filling height is less than 5m.