Before revision: Description An Olivier URL Belgian Screw Pile URL Screw Piles - Installation and Design in Stiff URL Deep Foundations on Bored and Auger Piles is drilled into the ground by the use of a steel drive pipe with at the bottom a cylindrical auger head with a helicoidal flange and a 'lost bit' underneath.
After revision: Description An Olivier pile is drilled into the ground by the use of a steel drive pipe with at the bottom a cylindrical auger head with a helicoidal flange and a 'lost bit' underneath.