UPLIFT CAPACITY OF SMALL-DIAMETER DRILLED SHAFTS FROM IN SITU TESTS. DISCUSSION

A discussion of a paper with the aforementioned title by Lutenegger and Miller, published in this journal (Volume 120, Number 8, August 1994), is presented. The discussion focuses on the use of effective stress analysis to determine uplift pier capacity. Day suggests the use of a short-term (undrained) analysis because the uplift on piers is a quick loading, due to wind or seismic forces. No closure is offered by the authors.