Abstract
High capacity micro piles are cast in place and heavily depend on construction technique and soil properties. As such, uncertainties regarding the bearing capacity of the piles are involved. Therefore, utmost care must be taken in designing piles to ensure safety. This paper determines the performance function of a pile's push-in bearing capacity under three separate critical conditions: ground subsidence due to the insufficient bearing capacity of a pile, steel-pipe fractures due to compression, and fractures in non-steel-pipe areas due to compression. We examine these uncertainties in terms of probability and study how to use partial factor design in programming the push-in bearing capacity of high capacity micro piles.
