Patent ID: 9340947
Filing Date: 2016-05-17
CPC Classification: E02D

Claim Text:
1. A concrete foundation having a pile anchor perimeter wall for supporting a tower or other structure subject to high upset forces which comprises: a plurality of pile anchors made of cementitious material extending downwardly into surrounding soil, said pile anchors arranged in a generally circular pattern with adjacent pile anchors overlapping one another to form a generally circular pile anchor perimeter wall that defines a continuous pile anchor perimeter, said generally circular perimeter wall surrounding a center area; a steel plate structure having holes therein placed over said pile anchors; a plurality of pile anchor bolts each having a lower end adjacent and bonded to cementitious material in a bottom portion of a respective one of said pile anchors, the bolts extending upwardly through the cementitious material of each said pile anchor to an upper end that projects through said holes in said steel plate structure and above an upper surface of said pile anchor cementitious material; said overlapping pile anchors around said continuous pile anchor perimeter forming a continuous arch, with compression and friction between the overlapping pile anchors resisting soil caving and sloughing pressure when soils in the center area are excavated following formation of the pile anchor perimeter wall; a first corrugated metal pipe (CMP) placed vertically inside the pile anchor perimeter wall after the center area is excavated, said first CMP being spaced from said pile anchor perimeter wall to create an annular ring between the first CMP and the surrounding pile anchor perimeter wall; cementitious material filling said annular ring for supporting a tower or other structure from an upper surface of said foundation; and a plurality of structure connecting elements embedded in the foundation and configured to secure a tower or other structure to said upper surface of the foundation.