Application 17/338,049 is a continuation of application No. 16/864,685, filed on May 1, 2020, granted, now 11,072,934.
Application 16/864,685 is a continuation of application No. 16/407,692, filed on May 9, 2019, granted, now 10,640,995, issued on May 5, 2020.
Application 16/407,692 is a continuation of application No. 15/916,724, filed on Mar. 9, 2018, granted, now 10,648,187, issued on May 12, 2020.
Application 15/916,724 is a continuation of application No. 15/530,081, filed on Dec. 1, 2016, granted, now 9,937,635, issued on Apr. 10, 2018.
Application 15/530,081 is a continuation of application No. 15/137,157, filed on Apr. 25, 2016, granted, now 9,534,405, issued on Jan. 3, 2017.
Application 15/137,157 is a continuation of application No. 14/748,241, filed on Jun. 24, 2015, granted, now 9,347,197, issued on May 24, 2016.
Application 14/748,241 is a continuation of application No. 14/176,160, filed on Feb. 10, 2014, granted, now 9,096,985, issued on Aug. 4, 2015.
Application 14/176,160 is a continuation of application No. 13/319,083, granted, now 8,661,752, issued on Mar. 4, 2014, previously published as PCT/US2010/041006, filed on Jul. 5, 2010.
Application 13/319,083 is a continuation in part of application No. 12/774,727, filed on May 6, 2010, abandoned.
Application 12/774,727 is a continuation in part of application No. 11/859,588, filed on Sep. 21, 2007, abandoned.
Application 16/407,692 is a continuation of application No. 16/191,781, filed on Nov. 15, 2018, granted, now 10,975,586, issued on Apr. 13, 2021.
Application 16/191,781 is a continuation of application No. 15/916,724, filed on Mar. 9, 2018, granted, now 10,648,187, issued on May 12, 2020.
Claims priority of provisional application 61/339,550, filed on Mar. 5, 2010.
Claims priority of provisional application 61/284,901, filed on Dec. 28, 2009.
Claims priority of provisional application 61/269,800, filed on Jun. 29, 2009.
Claims priority of provisional application 61/215,430, filed on May 5, 2009.
Claims priority of provisional application 60/954,502, filed on Aug. 7, 2007.
Claims priority of provisional application 60/826,452, filed on Sep. 21, 2006.
Prior Publication US 2021/0310262 A1, Oct. 7, 2021
1. A cast in situ wind turbine foundation comprising: a concrete slab-on-grade, having horizontal rebar therein; a laterally restrained and vertically prestressed concrete pedestal with a base and a predetermined height, the pedestal being integral with the support slab, and having vertical rebar and bursting reinforcing around and an array of vertical post tensioning elements therein; an array of ribs conjointly cast and integral with the pedestal, the ribs comprising horizontal cantilevered girders of tapering height that are fixed to the pedestal at inner ends thereof such that the minimum height dimension of the ribs is proximate to the slab at outer ends of the foundation and a maximum height dimension proximate to a top of the pedestal at the junctions of the ribs with the pedestal, and each rib having diagonally extending upper flexure reinforcing elements with embedded connection elements extending from the rib into the pedestal through the vertical rebar and vertical post-tensioning elements; connection elements extending from the ribs into the slab at spaced intervals along a length dimension of the ribs; a tower base supported atop the pedestal; wherein the pedestal is kept under a combination of heavy post compression stress and lateral confinement to thereby provide reduced stress range amplitudes, reduced deflections, increased bearing capacity and improved fatigue resistance, wherein the foundation includes a post tensioning element extending between the distal ends of each of the pairs of the ribs and comprising continuous concrete girders.
