Patent ID: 9739027
Date: 2017-08-22
CPC Classifications: E02D

Claim:
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; 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; and cementitious material filling said annular ring for supporting a tower or other structure from an upper surface of said foundation.