Patent ID: 8720139
Filing Date: 2014-05-13
Classification: E02D,E04C,E04H

Abstract:
1. A post-tensioned concrete foundation for supporting on its upper surface a tall tower or other structure subject to heavy load and high upset forces, said foundation comprising: a concrete foundation cap for supporting a tall, tower or other structure from an upper surface and having a lower surface engaged with a ground surface; and plurality of post-tensioned helical anchors circumferentially spaced from one another, said helical anchors including a helical anchor pipe extending downwardly from said concrete foundation cap lower surface into surrounding soil underneath said concrete foundation cap, and a tensioning element coupled to an upper end of said helical anchor pipe and sleeved through the concrete foundation cap, an upper end of said tensioning element terminating above said concrete foundation cap upper surface, said tensioning elements pulling said cap downwardly and pulling the helical anchor pipes upwardly to post-tension said foundation cap and said helical anchors.