An openwork load-bearing structure for a wind turbine, in particular a lattice-tower structure for a wind turbine, in particular a foundation structure for a wind turbine, in particular for anchoring an offshore wind turbine in the ground via driven foundation piles, wherein the openwork load-bearing structure has primary structures, via which loads which occur in the load-bearing structure as a result of the wind turbine are dissipated, and secondary structures, which perform functional, rather than load-dissipating, tasks, wherein the secondary structures are arranged on the primary structures and are connected integrally thereto, and wherein the integral connection between the primary and the secondary structures is in the form of a connecting layer arranged therebetween. Also, a method for producing a lattice-tower structure for a wind turbine, in particular a foundation structure for a wind turbine, in particular for anchoring an offshore wind turbine in the ground via foundation piles.

An openwork load-bearing structure for a wind turbine, in particular a lattice-tower structure for a wind turbine, in particular a foundation structure for a wind turbine, in particular for anchoring an offshore wind turbine in the ground via driven foundation piles, wherein the openwork load-bearing structure has primary structures, via which loads which occur in the load-bearing structure as a result of the wind turbine are dissipated, and secondary structures, which perform functional, rather than load-dissipating, tasks, wherein the secondary structures are arranged on the primary structures and are connected integrally thereto, and wherein the integral connection between the primary and the secondary structures is in the form of a connecting layer arranged therebetween. Also, a method for producing a lattice-tower structure for a wind turbine, in particular a foundation structure for a wind turbine, in particular for anchoring an offshore wind turbine in the ground via foundation piles.

A load-bearing structure and a method of producing a load-bearing structure, in particular a tower of a wind energy plant, provides a hollow concrete part with an outer wall which is manufactured by several layers produced in wet-on-wet technology. The outer layer is a fine-grain concrete layer provided with a textile reinforcement, and the inner layer is made of bulk concrete.

The invention relates to a method for producing a tower construction (1) from reinforced concrete. A tower has at least one cavity (35) that extends in the longitudinal direction within the tower. Double-wall elements (2) are arranged along a periphery of the tower, each comprising an external plate (3) as well as an internal plate (4) in vertical or inclined position, forming vertical external joints (5) as well as vertical internal joints (6) between the external plates (3) and the internal plates (4). A reinforcement (9) is installed in the area of the vertical external joints (5) in-between the external plates (3) as well as the vertical internal joints (6) in-between the internal plates (4). The vertical external joints (5) and the vertical internal joints (6) in-between the double-wall elements (2) are closed and the double-wall elements (2) are filled with concrete (23).

A crane system includes a structural truss positioned within a central opening defined by an inside surface of an annular tower, a crane mast connected to an outside surface of the annular tower, and a jib arm connected to the crane mast.

A method and apparatus for constructing a tower, where the apparatus may include a structure including a foundation including a plurality of hydraulic cylinders; a truss tower located on the foundation and configured to support a tower built on the foundation; and a controller configured to control extension and retraction of the hydraulic cylinders.

A method and apparatus for constructing a tower, where the apparatus may include a structure including a foundation including a plurality of hydraulic cylinders; a truss tower located on the foundation and configured to support a tower built on the foundation; and a controller configured to control extension and retraction of the hydraulic cylinders.

A method for erecting a drilling rig and an apparatus therefor having a mast, a base, a floor support, legs arranged between the base and the floor support, a primary lifting ram in engagement with the mast, and a floor support lifting ram, is disclosed. The method involves raising the mast with the primary lifting ram, raising the floor support with the floor support lifting ram to an intermediate height, engaging the primary lifting ram with the floor support and raising the floor support from the intermediate height to full working height with the mast lifting ram.

An antenna tower is provided having one or more antennae at the removed end thereof, which tower is configured for ease of maintenance of the antenna by a serviceman standing on the ground and servicing the antenna. Applicants' antenna tower includes a fixed vertical base or mast tube, fixed to the ground and having a removed end. At or near the removed end of the base tube, a swing tube is pivotally attached. The swing tube has a first end removably coupled to a near end of the base tube, and a removed end extending beyond the removed end of the base tube. Attached to the removed end of the swing tube is a pivotally mounted configured member or pivot tube. The pivotally mounted elongated member receives an antenna thereupon. The pivot tube is removably coupled to the swing tube to allow the pivot tube to rotate.

An apparatus for connecting a lattice tower to the nacelle of a wind turbine. The apparatus has high flexural rigidity and enables direct transition between the nacelle and members of the lattice tower. The apparatus includes two rings joined together with vertical plates extending between them. Upper and lower faces of the apparatus are formed by upper and lower horizontal plates. Central ribs are coupled together and with the vertical plates through a plurality of attachment pieces. The central ribs in part form a large central polygonal hole for accommodating an electrical generator.