Back to results
US 10,947,747 B2Granted
Foundation with pedestal and ribs for towers
OwnerAhmed Phulyinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerAhmed Phulyinventor
Estimating the term…
A fatigue resistant gravity based spread footing under heavy multi-axial cyclical loading of a wind tower. The foundation having a central vertical pedestal, a substantially horizontal continuous bottom support slab, a plurality of radial reinforcing ribs extending radially outward from the pedestal. The pedestal, ribs and slab forming a continuous monolithic structure. The foundation may have a three-dimensional network of post-tensioning elements that keep the structural elements under heavy multi-axial post compression with a specific eccentricity intended to reduce stress amplitudes and deflections and allows the foundation to have a desirable combination of high stiffness and superior fatigue resistance. The foundation design reduces the weight and volume of materials used, reduces cost, and improves heat dissipation conditions during construction by having a small ratio of concrete mass to surface area thus eliminating the risk of thermal cracking due to heat of hydration.
A cast in situ foundation comprising, a continuous concrete support slab-on-grade having horizontal rebar therein, a vertically prestressed concrete pedestal integral with the support slab having vertical rebar, bursting reinforcing and hoops s around vertical post tensioning elements therein, an array of ribs conjointly cast and integral with the pedestal, the ribs being horizontal cantilevered girders of tapering height fixed to the pedestal at inner ends thereof and having diagonally extending upper flexure reinforcing elements of tapering height and deep connection elements extending from the rib into the pedestal passing through the vertical rebar and vertical post tensioning elements and lower connection elements extending into the slab at spaced intervals.
A foundation comprising, a concrete support slab having horizontal rebar therein, a concrete pedestal having vertical rebar therein integral with the support slab, a plurality of concrete ribs of tapering height on top of and integral with the support slab and integral with the pedestal, the ribs having connection elements radially extending into the pedestal past the vertical rebar and connection elements extending into the slab, the pedestal having an embedded cylinder forming a tower section with a lower flange encased in pedestal concrete and an upper end projecting above the pedestal and having means for receiving a base of second tower section atop the embedded tower section by means of a bolted connection.
Dependencies are inferred from the claim text.