Helical piles. Helical piles, also known as helical piers, are deep foundation underpinning elements constructed using steel shafts with helical flights. The shafts are advanced to bearing depth by twisting them into the soil while monitoring torque to estimate the pile capacity. Image/Audio Courtesy: Unknown DM for credit or removal request. Use intended only for knowledge and information purposes. #civilengineering #theconstructor #construction #civil #engineering #civilengineeringworld #civil