A system and method are provided for manufacturing a tower structure. Accordingly, an interlocking form ring is additively manufactured with a first printhead assembly. The interlocking form ring defines a plurality of recesses in a radially inner or a radially outer face. A cementitious material is deposited within one or more of the recesses with a second printhead assembly. At least one reinforcing member is positioned within the recess with the second printhead assembly. The second printhead assembly is positioned adjacent to the cementitious material during the curing thereof so as to provide a slip form for the curing of the cementitious material.

Method for installing a hollow concrete tower comprising the following steps: a) arranging a platform on a site; b) arranging on said platform at least one partial full-segment mould in a position such that the segment axis of the segment being cast in said mould is substantially vertical; c) pouring concrete inside said arranged partial mould(s); d) allowing the poured concrete to set to working strength, generating corresponding segment(s); e) removing the arranged mould(s) with concrete set to working strength, to leave the corresponding segment(s) exposed; f) assembling said corresponding exposed segment(s); and g) optionally, repeating steps b)-f) at least once.

A method is for generating a freeroom for a mast element in a ground. The method includes the steps: a) drilling a first annular recess into the ground, the first recess having: a first diameter; and a first depth; b) drilling a second annular recess in the ground, the second recess being arranged to receive the mast element, and the second recess: having a diameter which is smaller than the first diameter; having a second depth which is larger than the first depth; surrounding a first core of the ground; and being surrounded by the first recess; wherein there is, defined between the first recess and the second recess, a second core which can be removed to generate a freeroom.

A machine for the introduction of poles into the ground, particularly for the reinforcement of safety barriers. The machine including one movement assembly for the movement of the machine at the point where one safety barrier to be reinforced is located; one insertion assembly associated movable with the movement assembly and adapted to introduce at least partly into the ground one reinforcement pole at the point where the safety barrier is located; positioning device/component/unit (or the like) associated with the movement assembly and adapted to position the insertion assembly between: one home position, wherein it approaches the movement assembly; one operating position, wherein it is located beyond the safety barrier; and one insertion position, wherein it is tilted by an angle of insertion for the introduction of the reinforcement pole at the point where the safety barrier is located.

A vertical column has a column body extending between a first end and a second end. The column body includes a main body, a conical portion extending from the main body, and a tip portion extending from the conical portion. The vertical column includes a first helical structure extending around a portion of the main body and a second helical structure extending around a portion the tip portion.

A method of retrofitting a wind turbine having a tower and a first energy generating unit with a second energy generating unit. The method includes analyzing a first natural frequency of the tower relative to first rated operation frequencies of the tower having the second energy generating unit; when the first natural frequency lies within the first rated operation frequencies, modifying one or both the tower and the second energy generating unit so that the modified one or both the tower and the second energy generating unit have a second natural frequency and second rated operation frequencies that do not overlap; and replacing the first energy generating unit with the second energy generating unit.

A drilling rig system includes a mast that includes one or more front legs, one or more rear legs positioned opposite the one or more front legs, and a crown block at the top of the mast. The system also includes a raising line coupled to the crown block or the one or more rear legs and configured to apply a first force to the mast. The first force acts in a direction opposing a second force generated by the weight of the mast as the mast pivots between a substantially horizontal position and a substantially vertical position. The system also includes a drawworks assembly coupled to the raising line and configured to pull the raising line to generate the first force, and a telescoping spring assembly coupled to the one or more front legs. The telescoping spring assembly is configured to apply a third force to the mast that acts in the direction opposing the second force.

A mast assembly for a drilling rig includes a mast formed from a plurality of mast subunits. The mast assembly includes a lower drilling machine, upper drilling machine, and upper mud assembly, each of which is coupled to and movable vertically relative to the mast. The mast subunits are separable when the mast is in a transport configuration such that the LDM is positioned in a first subunit and the UDM is in a second subunit of the mast when the mast is in the transport configuration. The mast assembly may be used during a continuous drilling operation.

A mast assembly for a drilling rig includes a mast formed from a plurality of mast subunits. The mast assembly includes a lower drilling machine, upper drilling machine, and upper mud assembly, each of which is coupled to and movable vertically relative to the mast. The mast subunits are separable when the mast is in a transport configuration such that the LDM is positioned in a first subunit and the UDM is in a second subunit of the mast when the mast is in the transport configuration. The mast assembly may be used during a continuous drilling operation.

A tower structure of a pre-heating tower of a plant for thermally processing minerals may include a plurality of support beams that extend vertically and parallel to one another and are connected to one another via cross beams. The tower structure may further include a plurality of mounting positions, each mounting position for fitting a platform to the tower structure. A cross-sectional profile of at least two of the support beams changes over a height of the tower structure. Further, at least two adjacent support beams may be configured such that there is a greater amount of space between the beams at a bottom end region of the adjacent support beams than at a region above the bottom end region.