The invention discloses an offshore Tension Anode system and an installation method thereof. The system comprises a tension platform, a tension device, a composite cable integrated with auxiliary anodes and reference electrodes, and a gravity type foundation base, wherein the tension device is installed on the tension platform; the upper end of the composite cable is tensioned by the tension device, and the lower end of the composite cable sinks to a seabed along with the gravity type foundation base and is anchored by the gravity type foundation base; and the composite cable integrated with the auxiliary anodes and the reference electrodes is a main part of the system. The system is simple in structure and convenient to install and transport. The invention further discloses the installation method of the system, which can safely and reliably install the offshore tension anode system on an offshore platform. The installation method mainly comprises: (1) lifting the composite cable and the gravity type foundation base to an offshore platform; (2) installing the gravity type foundation base on a seabed; (3) installing the composite cable; (4) tension adjustment and lock fixation of composite cable.

Provided are a device for simulating a full-scale pile-sinking process of a static pressure pile by air bag preloading and a test method thereof. The device comprises a frame, a beam, a hydraulic jack, a model box, a model pile, a first sand layer, an undisturbed soil mass, a second sand layer, a rubber pad, a forcing air bag, a counter-force steel plate, a model box top cover, a forcing pipe, a pressure relief pipe, a steel casing and a control system. The first sand layer, the undisturbed soil mass, the second sand layer, the rubber pad, the forcing air bag and the counter-force steel plate are laid in the model box in sequence; and the steel casing passes through the model box top cover, the counter-force steel plate, the forcing air bag and the rubber pad in sequence and then reaches a bottom portion of the second sand layer.

An offshore platform with at least one pile of a pile foundation with an outer wall having an external diameter and with a tube (8, 12) with an inner wall having an internal diameter which is greater than the external diameter, on the exterior of which attachments are arranged, and which is slid over the pile (2, 3) driven into the seabed (4), wherein at least one spacer (20) is provided between the outer wall of the pile (2, 3) and the inner wall of the tube (8, 12).

An assembly includes first and second tubular members of a wind turbine support structure. The second member has a fork-shaped cross section with a main body between two substantially parallel walls that each comprise at least one through hole, the first member is between the two walls of the second member, and the through holes of the first and second member define a channel. A connector insertable in the channel is consecutively radially expandable. An actuator is configured to move the connector in an axial direction in said channel. The connector, when expanded, pushes the first member in a radial direction relative to said channel against the second member to define a clamping contact and thereby a pre-tensioned connection in said radial direction between a face of the first member and a face of the main body of the second member. A method of assembling the assembly.

Assembling a jacket structure that includes two or more legs and crossing braces extending between the legs and forming cross joints. A first component of the jacket structure includes two or more legs and brace structures. Each brace structure includes a first brace and a second brace, sections of the first and second braces being at one end attached to the first leg at respective first and second leg-brace joints. The brace structure and the first leg form an A-frame. A second component of the jacket structure that includes a second set of brace structures and a second part of the brace cross node is further provided. The first component of the jacket structure is mounted to the second component of the jacket structure by joining the first and second parts of the brace cross nodes to form full brace cross nodes.

A ring-wing floating platform is disclosed. The ring-wing floating platform includes a floating hull, a top of the floating hull being above a sea surface and its geometry at a water plane is centrally symmetric, a ring-wing surrounding a perimeter of a bottom of the floating hull with a horizontal projection of concentric annular geometries, a positioning system located at the bottom of the floating hull, and a topsides located above the floating hull and connected to the floating hull by deck legs or installed directly on the top of the floating hull. The axes of the ring-wing and the floating hull are collinear, and their bottoms are in a same horizontal plane. The ring-wing and the floating hull are connected together as a unitary structure by multiple connecting components with an annular gap in-between.

An offshore structure includes an original structure and an extension structure. The original structure includes a main platform supported via a foundation on a seabed. The extension structure includes a platform extension positioned laterally of the main platform and a platform extension support, depending downwardly from the platform extension, into contact with the foundation, so as to support the extension structure directly on the foundation.

The invention relates to a method for coupling a jacket with a foundation pile, comprising; mounting a first flange with the jacket, contacting a second flange with the foundation pile such that the second flange is supported by the foundation pile, mutually positioning the first flange and the second flange such that the jacket may be supported by the pile through the first flange and the second flange, arranging an inflatable spacing member between the first flange and second flange such that the spacing member contacts both the first flange and second flange for supporting the jacket through the spacing member.

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.

A suction bucket for a seabed foundation for an offshore facility is provided. The suction bucket is arranged for being embedded into a marine sediment. The suction bucket includes a lid and a sidewall. The sidewall is segmented into a first circumferential segment and at least a second circumferential segment. The first circumferential segment is connected with the second circumferential segment. The first circumferential segment and the second circumferential segment are attached to the lid of the suction bucket. Furthermore, the first circumferential segment and the second circumferential segment each contains at least one substantially planar section. Furthermore, a method to manufacture a suction bucket for a seabed foundation for an offshore facility is also provided.