Like a wine corkscrew but WAY bigger! This Auger Cast Pile rig is used for the installation of the foundations for the temporary bridge supports. You may recall a similar drill rig shown previously that is used for the permanent bridge foundations (See previous Blog: What is a Drill Shaft Rig?).
The Auger rig will be working its way down the median from the west end of the project to the east end ahead of the drill shaft rig. Notice the full-length screw-type auger on the side of the rig. This auger is drilled into the ground and as it is backed out and then concrete is pumped in.