The paper presents a project with typical dualistic-structural stratum in Wuhan, the average buried depth of the continuous sand layer is about 50m with no proper bearing layer for reasonable pile length, which makes cast-in-place pile sediment control difficult with low pile completion efficiency. More than 30mdepth fine sand with silty clay soil layer is selected as pile end bearing layer, the pile completion technology is verified through 2 separate groups of 14 testing piles with different pile diameters and pile lengths, comparing the load-bearing characteristics of these 2 groups, the shortage of value drawing according to standard empirical parameters is put forward, the post-grouting friction cast-in-place pile, 800mm in diameter and 30m in length, is selected as engineering pile parameter based on the comprehensive cost performance and bearing stability, which can provide the basis for pile foundation design optimization and can be the reference for the similar projects.