Post-grouting technology is widely used in the domestic civil engineering field,but there are few precedents in port,especially overseas port projects.There is also a lack of experience and reference for the adaptation conditions and technical parameters of post-grouting.Combining with a wharf project in West Africa,we introduce the construction process and technical parameters of post-grouting technology for cast-in-place piles under complex geological conditions in lagoon waters,and discuss adaptive conditions and consolidation effect of post-grouting.Combining with static load tests,we study the bearing capacity of the pile side and pile end before and after grouting,and compare test values with theoretical calculation values.The results show that the use of post-grouting technology can effectively improve the bearing capacity of pile foundation,but it has certain adaptability conditions,which can provide references for pile foundation design in similar port projects.