Patent ID: 11885092
Assignee: TERRACON CONSULTANTS, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A tensionless concrete foundation for supporting a tower comprising
a concrete pier having a first depth in an excavation, said concrete pier including an outer pier CMP and an inner pier CMP having a smaller diameter than the outer pier CMP to define an annular space between the inner pier CMP and the outer pier CMP,
a plurality of sleeved tower anchor bolts each having a lower end and an upper end, the plurality of sleeved tower anchor bolts embedded in said annular space and each sleeved tower anchor bolt of said plurality of sleeved tower anchor bolts secured at the respective lower end thereof to an embedment ring adjacent a bottom of the concrete pier, the anchor bolts extending upwardly beyond an upper surface of the concrete pier, said upper surface including a tower base flange support surface configured to support a tower having a tower base flange that is secured against the tower base flange support surface by the sleeved tower anchor bolts which are post-tensioned to keep the foundation under compression, and
a reinforcement structure providing increased lateral stiffness, overturning resistance and lateral bearing capacity to the concrete pier, wherein the reinforcement structure is a plurality of individual concrete blocks spaced around and adjacent an upper end but not a lower end of the outer pier CMP, each concrete block having an upper surface level with the upper surface of the concrete pier.