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US 6,672,023 B2Granted
Perimeter weighted foundation for wind turbines and the like
OwnerAllan P. Hendersoninventor
Life of this patent
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OwnerAllan P. Hendersoninventor
Estimating the term…
A perimeter weighted foundation has a central pier pedestal and a base extending outwardly from and below the pier pedestal. The base includes an outer perimeter wall section and a radially extending, disk-shaped spread section interconnecting the bottom of the pier pedestal and the top of the perimeter wall section with the top surface of the spread section being positioned substantially below the top of the pier pedestal. The pier pedestal includes vertical post tensioned anchor bolts in accordance with U.S. Pat. Nos. 5,586,417 and 5,826,387. The spread section includes two layers of sleeved post tensioned bolts which extend through the bottom of the pier pedestal, through the spread section and into the top of the perimeter wall section to post tension the perimeter wall section, the spread section and the pier pedestal. Soil back filled onto the top of the spread section and pier pedestal and into the interior of the pedestal enables the foundation to withstand high upset forces imparted to the foundation.
A perimeter weighted foundation subject to high upset forces, said foundation comprising:
A perimeter weighted foundation subject to high upset forces, said foundation comprising a pier pedestal of post-compressed cementitious material and an enlarged base of post-compressed cementitious material extending outwardly from and below said pier pedestal, said enlarged base including a generally annular vertical perimeter wall section having a substantially perimeter greater than the perimeter of said pier pedestal and a generally horizontal spread section positioned substantially below an upper end of said pier pedestal and substantially above a lower end of said perimeter wall section and extending radially and interconnecting a lower end portion of said pier pedestal and an upper end portion of said perimeter wall section.
A perimeter weighted foundation comprising a spread section constructed of cementitious material having vertically spaced, generally horizontal upper and lower surfaces, an inner perimeter and an outer perimeter, a pier pedestal constructed of cementitious material supported from said spread section, said pier including an annular peripheral wall having an upper end positioned substantially above said upper surface of said spread section and adapted to support a tower and a lower end joined with said inner perimeter of said spread section and a footing constructed of cementitious material, said footing including an annular peripheral wall having an upper end joined with and extending downwardly from said outer perimeter of said spread section and having a lower end positioned substantially below said lower surface of said spread section to form a void space inwardly of said footing and below said lower surface of said spread section and below a lower end of said pier pedestal.
Dependencies are inferred from the claim text.