Abstract: In the selection and design of the uplift foundation for an underground parking garage of a residential community, all feasible foundations were compared with both constructability and cost based on the site specific subsurface conditions. The optimized foundation type that can meet the bearing capacity requirements and also cost effective. The static loading tests were performed on two different pile types: prefabricated, prestressed reinforced concrete pipe piles and bored and castinpaced reinforced concrete piles. The testing under the natural ground and excavated conditions indicate that the uplift capacities are significantly different. Therefore, during the design stage, the pile testing conditions should be specified.

Key words: Pre-fabricated Pre-stressed Reinforced Concrete Pipe Piles, Bored and Cast-In-Place Reinforced Concrete Piles, MC Rigid Composite Columns, Cost Comparisons, Design Approaches