An earth anchor comprises an elongated square-section tube formed in its sides with throughgoing longitudinally-spaced slots each of which lies in a respective plane perpendicular to the tube axis. The lower end of the tube is pointed and the upper end is open. A plurality of L-shaped anchor elements are provided in the tube and each have a flat anchored leg slidable transversely in a respective one of the slots and extending generally perpendicularly to the tube and a flat guide leg extending generally parallel to the tube and slidable transversely in the tube on the anchor leg of the underlying anchor element. The lowermost anchor element is slidable on the upper surface of a member constituting the pointed tip of the tube. A tool having a wedge-shaped lower end is pushed down through the tube after the tube has been driven into the ground so as laterally to slide the elements one after the other out of the tube and into the earth surrounding them. Thereafter a holding element such as another tube may be fitted into the interior of the thus-set arrangement in order to hold the anchor elements in their extended position.
A method and apparatus for a barbed anchor pile is described in which a pile, having horizontally placed barbs, is driven into the seafloor. Once it is buried to a predetermined depth, the barbs are spread outward into the surrounding soil to ensure that the pile will not be pulled out by uplift loads.
A foundation support system for manufactured building structures comprising footings, vertically adjustable vertical support members, beam holders and intermediate beams. The intermediate beams being disposed transversely below the main beams of the structure to be supported. The intermediate beams are supported by the vertically adjustable vertical support members. One end of the vertical support members having a beam holder secured thereto for receivingly securing the intermediate beams. The other end of the vertical support member supported by a footing.
The invention provides exemplary earth anchors and methods for their use. In one exemplary embodiment an earth anchor comprises and elongate hub having a trailing end and a leading end. At least one blade is attached to the hub, with the plate having a discontinuous circular periphery. The blade is configured such that a continuous circle drawn around the periphery of the blade defines an area. The blade has an area that is less than about 70% of the area of the circle, and the ratio of a path at shear resistance for the blade to the perimeter of this circle is greater than about 90%. Tubular extensions are attached to the hub and poured above the hub to facilitate injection of a low-strength, impermeable non-cementitious chemical grout in order to seal potential paths for water created by installation of the anchor and thereby reducing the risk of increase rate of soil heave in expensive soils.
