Abstract: The "finned pile" is a modern modification method that is suggested in this thesis to enhance the capability of deep foundations exposed to uplift forces. On which these substantial foundations are built a variety of structures, including dock fendering systems, tower foundations, flooded platforms, and abutments. The alteration entails wrapping the area with two or four fins on the top, middle, and the buttom of the pile. Comparative small-scale model uplift testing was done on both standard piles without fins and piles with different fin designs in the study to enhance the effectiveness of each. The length ratio (Lf/Lp), width ratio (Wf/Wp), number, and shape of the fins were all systematically changed during the research. The studies shows that adding fins close to the pile top greatly increases the capability of the pile to withstand uplift forces. When comparing the two different fin designs evaluated, rectangular fins were found to perform better rather then triangular fins in terms of ultimate lifting capabilities. The ideal arrangement for maximizing the piles' maximum uplift capability resulted as to have a Lf/Lp ratio of 0.4. A higher fin width contributes to a higher capacity, the results also show a clear correlation between width of the rectangluar , triangular fins and uplift capacity of piles.

Keywords: ultimate uplift load, finned piles, load carrying capacity.

| DOI: 10.17148/IARJSET.2023.10909