A method for pile installation wherein use is made of a vessel for pile installation. A pile holding system is mounted to the hull of a vessel, e.g. on deck (2) of a vessel, which pile holding system is configured to hold the pile in an upright orientation at a pile installation location at least whilst suspended from a crane by means of one or more winch driven cables, e.g. for installation of a pile adapted to support an offshore wind turbine, the pile holding system comprises a pile holding tool (40). The pile holding tool (40) further comprises a damping system including at least one damping device (45) that is mounted to the base structure (42) and is configured to, in use, engage on the pile suspended from the crane at a location that is vertically spaced from the circumferential zone that is engaged by the plurality of pile engaging positioning devices (43) of the pile holding tool, and wherein the at least one damping device (45) is configured to dampen pendulum motion of the pile suspended from the crane.

A method for pile installation wherein use is made of a vessel for pile installation. A pile holding system is mounted to the hull of a vessel, e.g. on deck (2) of a vessel, which pile holding system is configured to hold the pile in an upright orientation at a pile installation location at least whilst suspended from a crane by means of one or more winch driven cables, e.g. for installation of a pile adapted to support an offshore wind turbine, the pile holding system comprises a pile holding tool (40). The pile holding tool (40) further comprises a damping system including at least one damping device (45) that is mounted to the base structure (42) and is configured to, in use, engage on the pile suspended from the crane at a location that is vertically spaced from the circumferential zone that is engaged by the plurality of pile engaging positioning devices (43) of the pile holding tool, and wherein the at least one damping device (45) is configured to dampen pendulum motion of the pile suspended from the crane.

A method of assembling a floating wind turbine platform includes assembling a keystone having a hollow central cavity from pre-formed concrete sections, and assembling a plurality of buoyant bottom beams from pre-formed concrete sections. Each bottom beam is attached to, and extends radially outward of the keystone to define a base assembly. Each buoyant bottom beam includes a ballast chamber therein. The keystone is post-tensioned to each bottom beam along a longitudinal axis thereof. A center column is assembled upwardly and perpendicularly on the base assembly from pre-formed sections of the center column, the outer columns are assembled on a distal end of each bottom beam from pre-formed sections of the outer columns, and the center column and the outer columns are longitudinally post-tensioned to the base assembly. A tower is assembled on the center column from pre-formed sections, and a wind turbine is assembled on the tower.

Disclosed is an offshore wind turbine, comprising: a base configured to be submerged when the turbine is in an upright generating position in open water; and, a tower attached to the base and having a longitudinal axis, wherein the tower and base are movable between a horizontal towing position in which the turbine is towable through a body of water, and an upright generating position in which the turbine is vertically orientated for use in the body of water. Also disclosed herein is a method of deploying a wind turbine comprising the steps of assembling the wind turbine in a horizontal or near horizontal orientation prior to deploying to an installation location, towing the assembled wind turbine in a horizontal or near horizontal position to the installation location and up righting the assembled wind turbine in the installation location.

Disclosed is an offshore wind turbine, comprising: a base configured to be submerged when the turbine is in an upright generating position in open water; and, a tower attached to the base and having a longitudinal axis, wherein the tower and base are movable between a horizontal towing position in which the turbine is towable through a body of water, and an upright generating position in which the turbine is vertically orientated for use in the body of water. Also disclosed herein is a method of deploying a wind turbine comprising the steps of assembling the wind turbine in a horizontal or near horizontal orientation prior to deploying to an installation location, towing the assembled wind turbine in a horizontal or near horizontal position to the installation location and up righting the assembled wind turbine in the installation location.

The present invention relates to apparatus and a method of embedding a plate anchor. The method comprises providing a plurality of embedment modules each of which is suitable for embedding a plate anchor within a different type of soil. The method comprises determining the type of soil of a seabed at a target site and selecting an embedment module based on the type of soil at the target site. The embedment module is removably mounted within a modular follower assembly. The modular follower assembly is deployed from a vessel and the embedment module is actuated to drive the plate anchor into the seabed. The modular follower assembly is then retrieved to the vessel. The modular follower assembly is reconfigured to provide the modular follower assembly with different embedment modules for a subsequent deployment and to embed further plate anchors within different soil types.

The present invention relates to apparatus and a method of embedding a plate anchor. The method comprises providing a plurality of embedment modules each of which is suitable for embedding a plate anchor within a different type of soil. The method comprises determining the type of soil of a seabed at a target site and selecting an embedment module based on the type of soil at the target site. The embedment module is removably mounted within a modular follower assembly. The modular follower assembly is deployed from a vessel and the embedment module is actuated to drive the plate anchor into the seabed. The modular follower assembly is then retrieved to the vessel. The modular follower assembly is reconfigured to provide the modular follower assembly with different embedment modules for a subsequent deployment and to embed further plate anchors within different soil types.

Framework structure (70) and method for modular construction of an offshore framework structure comprising frameworks (50) with a first bar (51) functioning as a floating body, a second bar (52), with two posts (53) for substantially parallel support of the bars (51, 52) and two bands (54) for tensioning the framework (50). A connection element (55) is arranged at each end of the bars (51, 52), each of which has a single flange (56) for attaching a single bar (51, 52) to the connection element (55). In the connection elements (55), receiving areas (57) are arranged transversely to the longitudinal direction (61) of the bars (51, 52) for attaching the posts (53). Further, the connection elements (55) have securing means (58) for securing bands (54) provided with tensioning devices (60) in such a way that the framework (50) can be held in shape or diagonally tensioned by means of the tensioning devices (60). The connection elements (55) are constructed with respect to the longitudinal direction (61) of the bars (51, 52) in such a way that an extension (62) is configured on one side and a holder (66) can be arranged on the opposite side so that the extension (62) of a connection element (55) of a framework (50) can be joined with the holder (66) of another connection element (55) of a further framework (50).

Framework structure (70) and method for modular construction of an offshore framework structure comprising frameworks (50) with a first bar (51) functioning as a floating body, a second bar (52), with two posts (53) for substantially parallel support of the bars (51, 52) and two bands (54) for tensioning the framework (50). A connection element (55) is arranged at each end of the bars (51, 52), each of which has a single flange (56) for attaching a single bar (51, 52) to the connection element (55). In the connection elements (55), receiving areas (57) are arranged transversely to the longitudinal direction (61) of the bars (51, 52) for attaching the posts (53). Further, the connection elements (55) have securing means (58) for securing bands (54) provided with tensioning devices (60) in such a way that the framework (50) can be held in shape or diagonally tensioned by means of the tensioning devices (60). The connection elements (55) are constructed with respect to the longitudinal direction (61) of the bars (51, 52) in such a way that an extension (62) is configured on one side and a holder (66) can be arranged on the opposite side so that the extension (62) of a connection element (55) of a framework (50) can be joined with the holder (66) of another connection element (55) of a further framework (50).

A marine wind power generation floating body according to an embodiment of the present disclosure can be coupled to a tower used for wind power generation and is provided at sea. The marine wind power generation floating body includes a floating main body which is formed at a predetermined length and which has a circular transverse cross section, a ballast part positioned on one side of the floating main body, a damping plate positioned at one end of the floating main body, and formed with a diameter that is larger than the outer diameter of one side of the floating main body, and a pitching/rolling damping part which is positioned on the other side of the floating main body, and which damps the horizontal pitching and rolling of the floating main body.