Construction Technology of PHC Tube-pile in Typical Thick-dense Sand Layer in Nanchang Area

Based on the example of pile foundation in Nanchang, static penetration in-situ test was used to analyze the geological characteristics of typical thick-dense sand layers in the area. Based on theoretical calculations and on-site tests, the hammer sinking resistance of PHC pipe piles and the ultimate bearing capacity of a single pile were analyzed. Reasonable suggestions were proposed for the design and construction of engineering piles, and the construction process of hammer driving PHC pipe piles under this geological condition was summarized. The subsequent pile bearing capacity testing results show that the optimized and adjusted construction technology meets the engineering design requirements and has achieved good social and economic benefits, which can be promoted and applied in this area.