More than 50 years passed before sonic drilling came back to one of its earliest uses as a pile driver. Today, the technology is far superior and set to revolutionize the piling industry with a just-patented method.
Urban Foundation/Engineering was using two state-of-the-art Bauer BG drilling rigs from Equipment Corporation of America (ECA) to literally conquer an underground boulder field in preparation for a 25-story residential building known as 18 Sixth Avenue.
John A. “Jack” Hayes, PE, D.I.C. is a widely recognized authority on Osterberg cell (O-cell) testing, a method of evaluating the integrity of drilled piles. We spoke to Hayes at this year’s Osterberg Memorial Lecture at the International Foundations Congress and Equipment Expo (IFCEE).