Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

The present invention discloses a prestressed-bolted dry-assembled segmental precast hybrid tower with grouting-free, comprising a top steel tower tube, a reverse self-balancing steal-concrete transition section, and a prestressed-bolted dry-assembled segmental precast concrete tower with grouting-free dry fast splicing and a gear reinforced wind turbine foundation; the steel tower tube, the steel-concrete transition section, the concrete tower tube and the hollow wind turbine foundation are integrally connected from top to bottom through a prestressed steel strand system to improve the overall bending resistance of the tower; the upper end of the prestressed steel strands is anchored to the steel-concrete transition section, and the lower end is anchored to the bottom face of the wind turbine foundation corbel; the concrete tower tube is composed of a number of segmental tapered precast concrete tower segments, which are grouting free spliced vertically, and the vertical splicing utilizes positioning pins to accurately position the installation position. The prefabricated concrete tower tube segment is formed by a number of circular arc-shaped prefabricated concrete pipe segments with circumferential grouting free dry splicing. The segments are spliced into a whole by prestressed bolts and then installed staggered from top to bottom to enhance the shear resistance.

A system for manufacturing a tower structure of a wind turbine includes an additive printing device having a central frame structure with a platform and an arm member. The arm member is generally parallel to a longitudinal axis of the tower structure. The additive printing device also includes a plurality of robotic arms secured to the arm member of the central frame structure. Each of the robotic arms includes a printer head for additively printing one or more materials. The additive printing device further includes at least one nozzle configured for dispensing a cementitious material. Moreover, the system includes one or more molds additively printed via the additive printing device of a polymer material. As such, the mold(s) define inner and outer wall limits of the tower structure. After the mold(s) are printed and solidified, at least one of the printer heads or the nozzle of the additive printing device is configured to dispense the cementitious material between the inner and outer wall limits of the tower structure.

A hybrid tower section for arrangement between a concrete tower section and a steel tower section of a hybrid tower for a wind power installation. The hybrid tower section comprises a steel flange having a multiplicity of annularly arranged blind holes and having a multiplicity of annularly arranged passage holes, a steel outer casing, and a concrete core, wherein the annular arrangement of the blind holes has a larger radius than the annular arrangement of the passage holes, wherein the steel outer casing has a larger radius than the annular arrangement of the blind holes, wherein the concrete core adjoins the steel flange and the steel outer casing, and a radially inner side of the concrete core has a larger radius than the annular arrangement of the passage holes.

A power transmission tower comprises a tower body (100) longitudinally arranged and cross arms (120) transversely arranged on the tower body. The tower body (100) is provided with a first transverse direction (Y) and a second transverse direction (X), which are perpendicular to each other, in the horizontal direction. A supporting piece (110), which extends outwards from the tower body (100) in the first transverse direction (Y), is arranged on the power transmission tower. One end of the supporting piece (110) is fixed to the tower body (100) and the other end of the supporting piece (110) is a free end (111, 112). The cross arms (120) extend in the second transverse direction (X). One end of each cross arm (120) is connected to the free end (111, 112) and the other end of each cross arm (120) is used for arranging overhead wires. The power transmission tower reduces corridor width and occupies less area.

A power transmission tower comprises a tower body (100) longitudinally arranged and cross arms (120) transversely arranged on the tower body. The tower body (100) is provided with a first transverse direction (Y) and a second transverse direction (X), which are perpendicular to each other, in the horizontal direction. A supporting piece (110), which extends outwards from the tower body (100) in the first transverse direction (Y), is arranged on the power transmission tower. One end of the supporting piece (110) is fixed to the tower body (100) and the other end of the supporting piece (110) is a free end (111, 112). The cross arms (120) extend in the second transverse direction (X). One end of each cross arm (120) is connected to the free end (111, 112) and the other end of each cross arm (120) is used for arranging overhead wires. The power transmission tower reduces corridor width and occupies less area.

A method of assembling a drilling rig may include aligning a trailer with a drilling rig support structure, the trailer carrying a mast and the drilling rig support structure including a step-down substructure. A first end of the mast may be positioned over the drilling rig support structure and arms may be extended from the mast to the drilling rig support structure so that the drilling rig support structure supports the first end of the mast. The mast may translate along a length of the drilling rig support structure. The mast may be coupled to the drilling rig support structure.

The present invention relates to a manufacturing process in situ of concrete towers for wind turbines which enables executing a design of concrete tower manufactured in situ by means of climbing formwork, which reduces the execution time of the concrete tower, where the invention also relates to the associated concrete tower for wind turbine.

This application relates to hinged tower segments and transport methods, and particularly to methods and apparatus for transporting and storing hinged segments of steel wind turbine towers. The wind turbine tower comprises a plurality of cylindrical vertical tower sections, which in the finished tower are mounted on top of one another. The vertical section of the tower has a longitudinal axis and comprises a plurality of wind turbine tower segments, the tower segments have vertical and horizontal edges and combine to form a complete vertical tower section by joining along their edges. Adjacent vertical tower sections are joined to each other along the horizontal edges of the wind turbine tower segments. Hinges are secured between tower segments and the tower segments rotated about the hinged axis to make them suitable for transport or storage. A method of assembling a tower section is discussed.

A modular composite utility pole has a plurality of sections, each with a tapered hollow tube having a plurality of plies, wherein a first end has a larger diameter than a second end, wherein each section is adapted to join at least one adjoining section at a joint wherein the first end of an upper section overlaps the second end of a lower section, the lower section having a ledge proximate to the second end of the lower section, with a fastener passing through the joint via apertures in the sections, and wherein, when the modular composite utility pole is erected, the joint is self-located by the joint features, and wherein substantially all vertical load is transferred between sections via the a surface of the second end of the upper section resting upon the ledge of the lower section. Also disclosed are individual sections and methods of making them.