A vessel comprises an upending hinge having a frame mounted to at least one of a deck and a hull and a bearing member having a bearing surface between legs for bearing a monopile. The bearing member has bearing member pivots having a common axis of rotation. The bearing member has a monopile receiving position, which is a rotational position with respect to the common axis of rotation in which the bottom of the bearing member is located below the common axis of rotation and the bearing surface is facing upwardly. The bearing member also has a monopile upending position, which is a rotational position with respect to the common axis of rotation of in which the bearing surface is located outside and facing away from a circumferential wall at the location of the upending hinge. The frame is provided with a lifting mechanism for lowering the bearing member pivots.

The present invention relates to an assembly for lowering a pile onto a seabed, the assembly comprising: a floating vessel (24) comprising a vessel positioning system (42), a crane (12) provided on the vessel for lowering the pile (10) onto the seabed, a pile guiding system (50) configured to guide the pile during the lowering thereof by the crane, the pile guiding system comprising: o a base (40) connected to the vessel, o at least one pile guiding frame (20) comprising an annular portion (21), o one or more primary actuators (55) which are configured for moving the pile guiding frame, o one or more secondary actuators (60) connected to the annular portion of the pile guiding frame, o at least one frame position sensor (62) for measuring an excitation parameter, o a guiding control unit (64) comprising an excitation controller (80) configured to control the actuators and a resilience controller configured to control a stiffness.

A marine foundation such as a jacket or a tripod foundation for a wind turbine comprises suction piles that are subjected, in service, to cyclical loading of compression phases and tension phases in alternation. Each pile has a one-way valve that opens and closes autonomously in response to pressure differentials between the internal chamber and the surrounding water. The valve opens during the compression phases to effect fluid communication between an internal chamber of the pile and surrounding water. Water is thereby ejected from within the chamber through the valve. Conversely, during the tension phases, the valve closes and water is admitted into the pile only through soil within a skirt of the pile. Thus, a unidirectional, generally upward flow of water is driven through the soil within the skirt during the compression and tension phases, maximising water flow friction and reducing the risk of liquefaction of the soil.

A marine foundation such as a jacket or a tripod foundation for a wind turbine comprises suction piles that are subjected, in service, to cyclical loading of compression phases and tension phases in alternation. Each pile has a one-way valve that opens and closes autonomously in response to pressure differentials between the internal chamber and the surrounding water. The valve opens during the compression phases to effect fluid communication between an internal chamber of the pile and surrounding water. Water is thereby ejected from within the chamber through the valve. Conversely, during the tension phases, the valve closes and water is admitted into the pile only through soil within a skirt of the pile. Thus, a unidirectional, generally upward flow of water is driven through the soil within the skirt during the compression and tension phases, maximising water flow friction and reducing the risk of liquefaction of the soil.

The invention relates to a method for designing and forming a retaining wall in the ground having a required target wall stiffness made of a soil-based mortar, which is produced in the ground by mixing soil material and a cement suspension, and vertically aligned support beams, which are positioned in the soil-based mortar and arranged therein, wherein the arrangement of the support beams is laid-out to have an overall beam stiffness. According to the invention, it is provided that the support beams are arranged such that the laid-out overall beam stiffness is less than the required target wall stiffness, and that, when laying-out and arranging the support beams, an additional stiffness component is added that results from at least one adjacent wall section made of soil-based mortar.

The invention relates to a method for designing and forming a retaining wall in the ground having a required target wall stiffness made of a soil-based mortar, which is produced in the ground by mixing soil material and a cement suspension, and vertically aligned support beams, which are positioned in the soil-based mortar and arranged therein, wherein the arrangement of the support beams is laid-out to have an overall beam stiffness. According to the invention, it is provided that the support beams are arranged such that the laid-out overall beam stiffness is less than the required target wall stiffness, and that, when laying-out and arranging the support beams, an additional stiffness component is added that results from at least one adjacent wall section made of soil-based mortar.

The invention relates to a method and system for installing a load-bearing element in a seabed, a method and system for installing a subsea anchor on a seabed, a subsea pile and a subsea anchor.

A subsea foundation for installation on a sea floor. The subsea foundation includes a receptacle which receives a wellhead housing, and a conductor pipe which is arranged to extend from the receptacle and which receives a well pipe therethrough. The conductor pipe has a first section and a second section. The first section of the conductor pipe has a first end and a second end. The first section is connected to the receptacle at the first end and is pivotably connected to the second section at the second end so that the conductor pipe has a compact configuration, in which the conductor pipe comprises a bend therein, and an extended configuration, in which the conductor pipe is substantially straight.

The invention relates to a handling device for gripping and inserting a pile tube into a borehole in the ground to form a foundation pile, comprising a base frame, a gripping device for gripping and holding the pile tube, and a holding element for releasably connecting the base frame to a hoist, in particular a suspension rope. According to the invention, it is provided that at least one inlet device for supplying a curable medium is arranged on the base frame in an upper region and at least one outlet device for the curable medium to the pile tube is arranged in a lower region.

The present invention relates to an anchoring system (1) comprising an anchor pile (2) configured to be embedded in a borehole (30) drilled in a ground surface. The anchor pile (2) comprises an elongate main body (3) having a longitudinal axis (L) and comprising an upper end (4) and a lower end (5). The cross section of the elongate main body (3) increases along a portion of the longitudinal axis (L) in the direction from the upper end (4) to the lower end (5) defining at least one bearing surface (7a, 7b) such that in use an annular gap (32) for receiving locking media is defined between the at least one bearing surface (7a, 7b) and the adjacent portions of the borehole (30). The anchor pile (2) is locked in position within the borehole (30) on receipt of locking media within the annular gap (32) and abutment of the loose material with the bearing surface (7a, 7b).