The invention relates to a foundation (10) for a wind turbine substantially consisting of a concrete-cast plinth-like portion (11) having at least one cast-in-situ tower fastening element (60) located therein on which a tower of the wind turbine can be arranged and to which the tower of the wind turbine can be connected, and of a second, substantially horizontally extending portion (12) as planar foundation body, wherein the second portion (12) is arranged connected to the first portion (11), and wherein the second portion (12) of the foundation (10) substantially consists of at least three prefabricated horizontal elements (22), preferably made of reinforced concrete. There is provision here that the at least three horizontal elements (22) each have at least one base portion (23) with a stiffening element (26) extending substantially vertically thereon, that the horizontal elements (22) can be arranged in dependence on the parameters of the tower to be erected, in particular the tower radius, and that there is in each case a distance (B) between the horizontal elements (22).

A Mobile Autonomous Solar-Wind Electrical Station (MASWES) comprises an offshore container (2), which equipped with a reinforced case (18); a reinforced grillage (19) provided by at least two beams laid along, and plurality beams laid across the container (2); at least two reinforced internal columns (42) arranged in opposite comers of the container (2) and between the grillage (19) and the middle part of the reinforced case (18); a plurality of light reflecting mats (21); a plurality of movable screw-piles (22), which in the transport position are stored in the plurality of cylindrical channels (38); at least two monolithic towers or telescopic masts (52) of powerful horizontal-axis wind turbines (23) providing at least 10 kW power each with blades and wind vanes taken off in the transport position. The reinforced internal columns (42) are the bases for the monolithic towers or the telescopic masts (52) and equipped with a hydraulic mechanism or an electric actuator (54) and an erection tool for installation of mentioned monolithic towers or telescopic masts (52). The container (2) comprises gondolas, which in the transport position are arranged horizontally in opposite ends of the container (2); a plurality of photovoltaic double-sided panels (24); a plurality of multifold frameworks for photovoltaic panel arrays (25) with at least 30 kW power total and at least one charging point (28) stored inside the container and at least one rechargeable battery (31).

Provided is a composite tower structure and a method of designing and assembling the same, the composite tower structure including: a tower body, a foundation to which a bottom end of the tower body is fixed, a plurality of vertical supports disposed around a perimeter of the tower body, and a support structure connecting a top end of each of the plurality of vertical supports to the tower body. The composite tower structure may further include one or more intermediate guide structure(s) connected to the tower body and supporting a middle portion of the plurality of vertical supports.

To upend and lift an object, e.g. a foundation member of an offshore wind turbine, e.g. a monopole, use is made of an upending and lifting tool, wherein, with the tool suspended from one or more hoisting cables, e.g. from a crane hook of a crane, and with the frame of the tool initially in vertical orientation, a routine is performed which includes operating one or more shifting actuators, thereby moving a cable shifting member and engaging a cable engagement surface with the one or more hoisting cables at a height above a pivot axis. Further continuing this motion of the cable shifting member and thereby applying a cable shifting force on the one or more hoisting cables results, in reaction, in a pivoting of the frame into the horizontal orientation thereof.

The invention provides a floating windmill, comprising a floating element and a wind turbine. The floating windmill is distinguished in that it further comprises: a tension leg, an anchoring, a buoyancy element, a swivel and a cross bar, wherein the swivel is arranged in the buoyancy element. In operation, the floating windmill in operation is configured with the wind turbine in an upper end of the floating element extending up above the sea level, with a lower end or part of the floating element submerged in the sea, with the cross bar in one end connected to the lower part or end of the floating element and in the opposite end connected to the buoyancy element, with the buoyancy element fully submerged, preferably at safe draught depth below surface for service vessels and/or marine transport ships, with the tension leg arranged between the buoyancy element and the anchoring on the seabed. The floating windmill configured with the wind turbine in the upper end can weathervane freely around the buoyancy element, wherein in a low force condition when the forces by ocean current, wind and waves are low the floating element, the buoyancy element and the tension leg is oriented in substance in vertical direction and the cross bar is oriented in substance in horizontal direction, wherein in a high force condition when the forces by ocean current, wind and waves are high the shape of the floating element, cross bar, buoyancy element and tension leg is stretched by the forces to provide a shape like a lazy-s configuration, which change in shape and dynamic behavior reduce extreme stress levels.

A Mobile Autonomous Solar-Wind Electrical Station (MASWES) comprises an offshore container (2), which equipped with a reinforced case (18); a reinforced grillage (19) provided by at least two beams laid along, and plurality beams laid across the container (2); at least two reinforced internal columns (42) arranged in opposite corners of the container (2) and between the grillage (19) and the middle part of the reinforced case (18); a plurality of light reflecting mats (21); a plurality of movable screw-piles (22), which in the transport position are stored in the plurality of cylindrical channels (38); at least two monolithic towers or telescopic masts (52) of powerful horizontal-axis wind turbines (23) providing at least 10 kW power each with blades and wind vanes taken off in the transport position. The reinforced internal columns (42) are the bases for the monolithic towers or the telescopic masts (52) and equipped with a hydraulic mechanism or an electric actuator (54) and an erection tool for installation of mentioned monolithic towers or telescopic masts (52). The container (2) comprises gondolas, which in the transport position are arranged horizontally in opposite ends of the container (2); a plurality of photovoltaic double-sided panels (24); a plurality of multifold frameworks for photovoltaic panel arrays (25) with at least 30 kW power total and at least one charging point (28) stored inside the container and at least one rechargeable battery (31).

A tensionless concrete pier foundation for supporting a tower and a method of constructing the same is provided, the foundation having an outer CMP and an inner CMP with an annular space therebetween in which a plurality of sleeved tower anchor bolts are embedded, at least the outer CMP having an upper edge that is flush with the top of the foundation after the tower has been installed. A method of plumbing a tower anchor bolt cage using a bolt alignment ring is also provided that includes coupling the upper ends of the CMPs together with lateral spacing bolts that extend across the annular space. The tower anchor bolt cage is suspended from the lateral spacing bolts by the bolt alignment ring, and the lateral spacing bolts are shimmed on a low side as necessary for leveling the alignment ring and plumbing the bolt cage, before concrete pour.

An adapter device for the horizontal preassembly of a wind turbine rotor includes a connection piece on the underside of the adapter device for fastening the adapter device to a tower system of a tower crane, and a rotor flange on the top side of the adapter device for fastening the rotor hub of the wind turbine rotor to be assembled.

A hybrid offshore wind turbine includes a monopile, friction wheel, and suction bucket.

A method of installing a foundation (1) for a structure. The foundation body (2) has a toe (7) at its distal end which defines an aperture into an internal cavity (12) defined by an inner wall (8). Fluid is jetted from a plurality of nozzles (9) to direct fluid distally into the soil (5) ahead of the toe (7) during installation. A pump arrangement (13) controlled by a controller (16) is used to vary the quantity of fluid at a proximal end to thereby vary the fluid suspension pressure adjacent the toe (7) in a fluid communication channel (11) extending between the proximal end and the toe (7). The controller varies the fluid suspension pressure as the toe (7) inserts deeper into the soil (5) based on a target fluid suspension pressure as a function of toe depth.