Abstract: An expandable earth anchor is provided with pivoted arms that remain contracted about a bolt rod as the rod, together with the anchor, is driven into the earth. Rotation of the rod with respect to the anchor induces an initial degree of expansion by rotation of the anchor arms about their pivot connection, followed by full expansion of the arms induced by movement of the bolt rod as a result of rotation of a bearing nut against a plate. Arrangements are provided for the expansion of a plurality of anchor devices on a single bolt rod, rendering the system suitable for various types of soils.

Abstract: A wall anchoring device for straightening a bowed foundation wall, and a method of anchoring the foundation wall to the surrounding soil, including an elongate member engaging a hollow tube at one end for driving an opposite chisel end of the tube into the earth. The hollow tube includes pivotable anchor arms that spread away from the hollow tube which is drawn back toward the foundation wall to anchor the device to the earth. A brace plate is forced against the interior of the foundation wall by tightening a fastening nut onto the elongate member so that outward pressure is applied to the foundation wall to straighten it.