Prediction of Pile Sep-Up for Ohio Soils, Executive Summary Report

摘要

ODOT typically uses small diameter driven pipe piles for bridge foundations. When a pile is driven into the subsurface, it disturbs and displaces the soil. As the soil surrounding the pile recovers from the installation disturbance, a time dependant increase in pile capacity often occurs. This phenomenon is referred to as set-up or pile freeze. A significant increase in pile capacity could occur due to the set-up phenomenon. For optimization of the pile foundations, it is desirable to incorporate set-up in the design phase or predict the strength gain resulting from set-up so that piles could be installed at a lower End of Initial Driving (EOID) capacity. This project was undertaken to compile and evaluate the pile set-up data available for Ohio soils.