Embodiments described herein relate to construction of subsurface structural elements that are configured to redirect soil forces. For instance, a form may be used to construct a subsurface structural element such that the subsurface structural element redirects soil forces to vertically displace a foundation rather than have the soil forces crack or otherwise damage the foundation.

Embodiments described herein relate to construction of subsurface structural elements that are configured to redirect soil forces. For instance, a form may be used to construct a subsurface structural element such that the subsurface structural element redirects soil forces to vertically displace a foundation rather than have the soil forces crack or otherwise damage the foundation.

A foundation for an offshore structure is disclosed. The foundation includes a tower having an anchoring portion anchored in the seabed and a connecting portion arranged at the opposite end. The foundation also includes a power generation system arranged above the water surface connected to the connecting portion of the tower. A natural frequency of the offshore structure lies below an excitation component one times the rotational frequency 1P of at least one exciting component. The foundation also includes at least one restoring element connected to the tower via one or more transition pieces. The restoring element is designed such that, in a skewed position of the tower, tensile and/or compressive forces can be transferred to the tower by means of the restoring element such that the tower can be straightened up.

A reinforced 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, and the pier foundation including at least one reinforcement structure that at least partly encircles the outer CMP to provide one or more of increased lateral stiffness, increased shear resistance and overturning (upset) moment capacity, reduced bending, displacement, and deflection of the top of the pier, and improved conditioning, containment, skin friction and lateral bearing capacity of the surrounding soil and/or rock substrate that supports the tensionless pier.

A pile system for support structures includes at least two piles each having a first end, a second end, and a cylindrical elongate body. Each cylindrical elongate body has an inner surface and an outer surface, extends from the first end toward the second end, and defines an internal cavity with a longitudinal axis. Each pile further includes a transition region between the elongate body and the second end, the transition region including an annular seating shoulder disposed on the inner surface of the cylindrical elongate body that defines a step increase from a primary inner diameter to a secondary inner diameter. The first end of a first pile of the at least two piles is configured to be inserted into the second end of a second pile until a first distal edge thereof contacts the seating shoulder of the second pile.

A pile system for support structures includes at least two piles each having a first end, a second end, and a cylindrical elongate body. Each cylindrical elongate body has an inner surface and an outer surface, extends from the first end toward the second end, and defines an internal cavity with a longitudinal axis. Each pile further includes a transition region between the elongate body and the second end, the transition region including an annular seating shoulder disposed on the inner surface of the cylindrical elongate body that defines a step increase from a primary inner diameter to a secondary inner diameter. The first end of a first pile of the at least two piles is configured to be inserted into the second end of a second pile until a first distal edge thereof contacts the seating shoulder of the second pile.

Disclosed herein are a group anchor system, subsea installation tool and method of install such group anchor systems. The group anchor system includes a template through which a plurality of vertical piles, such as helical piles, are passed, drilled into the seabed at one end and secured to the template at the other to provide a mooring anchor for an offshore asset. The installation tool is a modular tool designed to mate with the group anchor system. Each module including drive mechanism for engaging and driving a pile. The piles may be driven simultaneously, individually, or in groups as required for proper placement and leveling. Methods of using the installation tool are also disclosed.

Disclosed herein are a group anchor system, subsea installation tool and method of install such group anchor systems. The group anchor system includes a template through which a plurality of vertical piles, such as helical piles, are passed, drilled into the seabed at one end and secured to the template at the other to provide a mooring anchor for an offshore asset. The installation tool is a modular tool designed to mate with the group anchor system. Each module including drive mechanism for engaging and driving a pile. The piles may be driven simultaneously, individually, or in groups as required for proper placement and leveling. Methods of using the installation tool are also disclosed.

A deep foundation system having an array of concrete blocks that preferably includes multiple rows of blocks and multiple columns of blocks. Each block preferably has an upper surface, a lower surface and a plurality of side portions. Each side portion can extend from the upper surface to the lower surface. The array of blocks can have an outermost edge or a peripheral portion. A plurality of open ended channels can be provided through the blocks, each channel preferably extending from one side portion to a different side portion. At least two of the channels can be spaced apart and in between a first and a second of the side portions. At least two of the channels can be spaced apart and in between a third and a fourth of the side portions. The tensile cable members preferably extend through multiple channels of multiple of the blocks and to the peripheral or outer edge portion. One or more openings can be provided in each block. The one or more openings each preferably extend from the upper surface to the lower surface. Each said opening can be positioned in between two of said tensile cable members. An inclined piling preferably extends through the block opening. A load transfer interface can transfer load from each block to inclined piling.

A deep foundation system having an array of concrete blocks that preferably includes multiple rows of blocks and multiple columns of blocks. Each block preferably has an upper surface, a lower surface and a plurality of side portions. Each side portion can extend from the upper surface to the lower surface. The array of blocks can have an outermost edge or a peripheral portion. A plurality of open ended channels can be provided through the blocks, each channel preferably extending from one side portion to a different side portion. At least two of the channels can be spaced apart and in between a first and a second of the side portions. At least two of the channels can be spaced apart and in between a third and a fourth of the side portions. The tensile cable members preferably extend through multiple channels of multiple of the blocks and to the peripheral or outer edge portion. One or more openings can be provided in each block. The one or more openings each preferably extend from the upper surface to the lower surface. Each said opening can be positioned in between two of said tensile cable members. An inclined piling preferably extends through the block opening. A load transfer interface can transfer load from each block to inclined piling.