Abstract: The static uplift load tests on two percussively formed castinplace concrete piles indicated that the uplift resistance did not meet the design requirements. The uplift resistance estimation should consider the influence of the slurry in the pile installation, and the limit uplift resistance should be determined by the static load testing since the large variations of different estimation methods. The piles were post grouted and the uplift resistances are significantly improved.   

Key words: Percussively Formed CastinPlace Concrete Piles, Single Pile Static Uplift Loading Tests, Axial Uplift Capacity, Slurry for Borehole Stability, Post Grouting