A gravity-based structure for hydrotechnical facilities and for setting up production, transport, transshipment and warehouse complexes with applications near-shore and offshore. The GBS has rectangular top and base slabs, external walls and internal vertical walls to separate the compartments, a central part forming a rectangular prism with the top slab, and a protruding part stretching along the central part sides around its perimeter and having vertical external walls. The protruding and central parts share the base slab, with the protruding part being shorter than the central part. Central part internal vertical longitudinal and transverse walls form compartments. Protruding part internal vertical walls perpendicular to external walls form compartments from the short ends and ballast compartments on the sides. Vertical longitudinal and transverse walls form additional compartments between the intermediate horizontal and base slabs. The design is suitable for shallow waters transportation and adjusted to Arctic conditions and ice impact.

A method of installing a monopile in a seabed, having the steps of in a harbor, charging the monopile on a transportation barge or vessel having a rotatable upending tool, the monopile resting on at least one cradle of the upending tool, moving the transportation barge or vessel to an installation location, rotating the monopile and the upending tool together to a discharge position, in which the monopile is vertical, partly immersed in a body of water and has a first longitudinal extremity resting on a bottom part of the upending tool, by pulling a second longitudinal extremity using a crane mounted on a heavy lift vessel or on a jack-up platform, disengaging the monopile from the upending tool using the crane, lowering the monopile and hammering the monopile into the seabed.

A method of installing a monopile in a seabed, having the steps of in a harbor, charging the monopile on a transportation barge or vessel having a rotatable upending tool, the monopile resting on at least one cradle of the upending tool, moving the transportation barge or vessel to an installation location, rotating the monopile and the upending tool together to a discharge position, in which the monopile is vertical, partly immersed in a body of water and has a first longitudinal extremity resting on a bottom part of the upending tool, by pulling a second longitudinal extremity using a crane mounted on a heavy lift vessel or on a jack-up platform, disengaging the monopile from the upending tool using the crane, lowering the monopile and hammering the monopile into the seabed.

A shared mooring-anchor system may have one or more variable resource foundations, the one or more variable resource foundations supporting a variable resource. A shared mooring-anchor system may have at least one near-surface buoy and at least one seabed anchor. A shared mooring-anchor system may orient the variable resource near, at, or above a waterline of a source of water. A shared mooring-anchor system may connect the one or more variable resource foundations to the at least one near-surface buoy, the at least one near-surface buoy is connected to the at least one seabed anchor, the at least one seabed anchor is not vertically in alignment underneath the at least one near-surface buoy, an angle between the one or more variable resource foundations, the at least one near-surface buoy, and the at least one seabed anchor is not a right angle.

A shared mooring-anchor system may have one or more variable resource foundations, the one or more variable resource foundations supporting a variable resource. A shared mooring-anchor system may have at least one near-surface buoy and at least one seabed anchor. A shared mooring-anchor system may orient the variable resource near, at, or above a waterline of a source of water. A shared mooring-anchor system may connect the one or more variable resource foundations to the at least one near-surface buoy, the at least one near-surface buoy is connected to the at least one seabed anchor, the at least one seabed anchor is not vertically in alignment underneath the at least one near-surface buoy, an angle between the one or more variable resource foundations, the at least one near-surface buoy, and the at least one seabed anchor is not a right angle.

A variable buoyancy platform including a support frame having a plurality of bottom pontoons fixedly mounted to a bottom side thereof. Each bottom pontoon includes at least an opening disposed in a bottom portion thereof and at least a bottom pontoon air conduit port disposed in a top portion thereof. A plurality of top pontoons are fixedly mounted to a top side of the support frame. Each top pontoon includes at least an opening disposed in a bottom portion thereof and at least a top pontoon air conduit port disposed in a top portion thereof. A bottom air supply conduit system is connected to the at least a bottom pontoon air conduit port of each bottom pontoon. The bottom air supply conduit system includes at least an air supply valve for controlling air flow therethrough and a connector adapted for being connected to a pressurized air supply. At least a top pontoon air valve is connected to the at least a top pontoon air conduit port of each top pontoon. The at least a top pontoon air valve enables controlling ambient air flow therethrough.

A storage structure is configured to be buoyant or retained above a water line. The storage structure includes a frame having a back beam, a left beam attached to the back beam, a right beam attached to the back beam and a front beam attached to the left beam and the right beam to form a substantially rectangular configuration, wherein prior to a last of the beams being secured together an interior space accessible through an opening. The storage structure includes a bladder configured to be positioned through the interior space though the opening wherein the bladder is sized to be retained within the interior space whether the storage structure is above the water line or buoyant, the bladder including a vent, a fill port and a drain wherein an amount of water within the bladder is manipulated to provide ballast or buoyancy to the storage structure. The storage structure includes at least one floor panel secured to the frame over the bladder, side walls extending from a perimeter of the floor panel, wherein one side wall includes a door for ingress and egress to the storage structure. The storage structure includes a roof attached to the side walls.

The present application provides a top-lock pull-out type connecting device and an immersed tube construction ship; the connecting device comprising a support member, fixedly connected to the load-bearing element and located on a side of the load-bearing element facing the borne element; a sliding member, been able to slide relative to the load-bearing element in a connection direction of the load-bearing and borne elements; an ejector rod, used to push the sliding member, fixedly connected to the borne element; a first locking member, used to lock the ejector rod, movably connected between an end of the sliding member close to the borne element and the support member, and can to be driven by the sliding member to be close to or away from the ejector rod; and a second locking member, used to lock the sliding member, and connected between an end of the sliding member away from the borne element and the load-bearing element.

A variable buoyancy platform including a support frame having a plurality of bottom pontoons fixedly mounted to a bottom side thereof. Each bottom pontoon includes at least an opening disposed in a bottom portion thereof and at least a bottom pontoon air conduit port disposed in a top portion thereof. A plurality of top pontoons are fixedly mounted to a top side of the support frame. Each top pontoon includes at least an opening disposed in a bottom portion thereof and at least a top pontoon air conduit port disposed in a top portion thereof. A bottom air supply conduit system is connected to the at least a bottom pontoon air conduit port of each bottom pontoon. The bottom air supply conduit system includes at least an air supply valve for controlling air flow therethrough and a connector adapted for being connected to a pressurized air supply. At least a top pontoon air valve is connected to the at least a top pontoon air conduit port of each top pontoon. The at least a top pontoon air valve enables controlling ambient air flow therethrough.

A variable buoyancy platform including a support frame having a plurality of bottom pontoons fixedly mounted to a bottom side thereof. Each bottom pontoon includes at least an opening disposed in a bottom portion thereof and at least a bottom pontoon air conduit port disposed in a top portion thereof. A plurality of top pontoons are fixedly mounted to a top side of the support frame. Each top pontoon includes at least an opening disposed in a bottom portion thereof and at least a top pontoon air conduit port disposed in a top portion thereof. A bottom air supply conduit system is connected to the at least a bottom pontoon air conduit port of each bottom pontoon. The bottom air supply conduit system includes at least an air supply valve for controlling air flow therethrough and a connector adapted for being connected to a pressurized air supply. At least a top pontoon air valve is connected to the at least a top pontoon air conduit port of each top pontoon. The at least a top pontoon air valve enables controlling ambient air flow therethrough.