The present invention provides a foundation for a wind turbine. To reduce set-up time and to allow complete alignment of the platform which carries the base flange of the tower construction, the invention provides a foundation with a cage structure having an upper stress distribution flange connected by a plurality of tensioned anchor bolts to a lower flange. The flanges are separated by a number of distance elements whereby the shape of the cage structure becomes fixed by the combination between tensioned bolts and distance elements. Since the cage structure has a fixed shape, the upper stress distribution flange can be aligned before the cage structure is embedded in concrete, and it becomes unnecessary to wait for the concrete to harden.

A beam pumping unit includes an integrated base assembly that has a precast concrete pad and a support base partially embedded within the precast concrete pad. The beam pumping unit further includes a pedestal supported by the support base and a Samson post supported by the support base. Also disclosed is a method for making and assembling a beam pumping unit near a wellhead. The method includes the steps of producing an integrated base assembly that has a support base within a concrete pad, placing the integrated base assembly near the wellhead, and securing a Samson post to the integrated base assembly.

A structure for supporting a foundation pit based on a steel edge-arch structure, including: an enclosing purlin beam, the steel edge-arch structure, a plurality of support beams and a plurality of triangular supports. The support beams are located at an inner side of the enclosing purlin beam. The triangular supports are arranged on the enclosing purlin beam. End portions of the support beams are supported on the enclosing purlin beam through the triangular supports, and abutted on side edges of the triangular supports. The steel edge-arch structure is located between two adjacent triangular supports. The steel edge-arch structure includes two first haunched members and a bracing beam provided therebetween.

A ground anchor system configured for introducing into a borehole, and comprising a plurality of straps each having a length dimension extending along a central longitudinal axis of the ground anchor system. Each of said straps has a width dimension taken along a major axis and a thickness dimension taken along a minor axis. The major axis and the minor axis are disposed at a transverse plane of the ground anchor system and intersect at a middle point. The middle point of each of said straps is intersected by an imaginary line extending through the longitudinal axis at the transverse plane. The imaginary line forms an angle smaller than 90 with the major axis of the respective strap.

In one aspect, a tieback assembly is provided herein for supporting a SOE, the tieback assembly including: at least one anchor; an anchor threaded element extending from an end of the anchor; at least one tendon threaded element; and, a coupler having a body with a threaded bore, the tendon threaded element and the anchor threaded element threadedly engaging the threaded bore. Furthermore, the tendon threaded element is provided with sufficient length to extend at least from the coupler to externally of the SOE so that a portion of the tendon threaded element may be engaged externally of the SOE to allow for disengagement of the tendon threaded element from the coupler. Advantageously, the subject invention allows for at least partial removal of a tendon from a tieback assembly, including removal of the tendon threaded element.

In one aspect, a tieback assembly is provided herein for supporting a SOE, the tieback assembly including: at least one anchor; an anchor threaded element extending from an end of the anchor; at least one tendon threaded element; and, a coupler having a body with a threaded bore, the tendon threaded element and the anchor threaded element threadedly engaging the threaded bore. Furthermore, the tendon threaded element is provided with sufficient length to extend at least from the coupler to externally of the SOE so that a portion of the tendon threaded element may be engaged externally of the SOE to allow for disengagement of the tendon threaded element from the coupler. Advantageously, the subject invention allows for at least partial removal of a tendon from a tieback assembly, including removal of the tendon threaded element.

A modular foundation design for supporting a wind turbine or telecommunication tower, comprised of pre-cast concrete modules offering advantages of off-site manufacture and ease of transportation, but which deign is simple to construct. A base slab is provided comprised of sub-modules/base members arranged together in juxtaposed position which together provide a horizontal surface on which pre-cast pipe members may be stacked in end-to-end position to form a pedestal. Anchor rods extend through the pipe members into screw retainers in the base members, which rods serve to not only post-tension the pipe members and secure them together, but further advantageously serve to retain the base members together thereby assisting in distributing forces and loads applied to one sub-module/base member over the entire base slab. Coupling means to further couple the base members together may be added to better retain the base members together and still further improve distribution of forces

A ground anchor system configured for introducing into a borehole, and comprising a plurality of straps each having a length dimension extending along a central longitudinal axis of the ground anchor system. Each of said straps has a width dimension taken along a major axis and a thickness dimension taken along a minor axis. The major axis and the minor axis are disposed at a transverse plane of the ground anchor system and intersect at a middle point. The middle point of each of said straps is intersected by an imaginary line extending through the longitudinal axis at the transverse plane. The imaginary line forms an angle smaller than 90 with the major axis of the respective strap.

Foundation system for towers, especially for onshore wind turbines, comprising a central shaft buried or partially buried, preferably hollow and formed by dowels made from precast concrete, an essentially flat lower slab and completely buried, and lateral support means in the form of inclined struts that are joined at their upper end with the central shaft and at its lower end with the lower slab, and that are preferably entirely buried. The wind tower is located on the partly buried main shaft. The foundation system may comprise other lower elements connected with the lower slab, such as radial ribs or peripheral beams. The struts are preferably prefabricated elements incorporating an efficient and economical connection system by pre-stressing. The foundation system maximizes the fraction of the weight of the foundation by gravity generated by soil or ballast material, allowing an important economy in the structural materials of the foundation.

A ground anchor system configured for introducing into a borehole, and comprising a plurality of straps each having a length dimension extending along a central longitudinal axis of the ground anchor system. Each of said straps has a width dimension taken along a major axis and a thickness dimension taken along a minor axis. The major axis and the minor axis are disposed at a transverse plane of the ground anchor system and intersect at a middle point. The middle point of each of said straps is intersected by an imaginary line extending through the longitudinal axis at the transverse plane. The imaginary line forms an angle smaller than 90 with the major axis of the respective strap.