The present invention relates to an anti-erosion system made of geo-synthetic material, preferably of polysteel raw material (polypropylene (PP) and polyethylene (PE) mixture) instead of only polypropylene or polyester or nylon, resulting in a compromise between the mechanical properties of polypropylene, the chemical properties of polyethylene, and the good resistance to the environmental agents achieved through the incorporation of molecular chain stabilizers. The fraction of PP should range from 50% to 90% and the fraction of PE from 10% to 50%.

A tieback alignment and access device has a hollow core and vertically aligned angled anchor subassemblies that provide attachment points for tieback anchors that pass laterally through the hollow core. The hollow core is configured to allow a cutting tool (e.g., a drill bit) to be inserted therein longitudinally and used to cut the tieback anchors at any time. When cast into a contiguous temporary support-of-excavation wall, the angled anchor subassemblies are set back from an outwardly facing surface of the wall resulting in a smooth surface.

A crane mat system includes a top surface and a bottom surface constructed of steel plates. The top surface and the bottom surface are joined by one or more sides and an internal support structure. Two or more lifting portions are mounted to recessed walls. Each lifting portion includes an arm having a proximal end attached to a recessed wall of the mat and a distal end attached to a plate. Each arm is mounted above the midline of the height of the mat. A protrusion is mounted on each arm such that when the mats are stacked, the protrusions over lower mats are nested within recessed cutouts of upper mats. The lifting portions are configured such that a sling can lift a stack of mats.

A crane mat system includes a top surface and a bottom surface constructed of steel plates. The top surface and the bottom surface are joined by one or more sides and an internal support structure. Two or more lifting portions are mounted to recessed walls. Each lifting portion includes an arm having a proximal end attached to a recessed wall of the mat and a distal end attached to a plate. Each arm is mounted above the midline of the height of the mat. A protrusion is mounted on each arm such that when the mats are stacked, the protrusions over lower mats are nested within recessed cutouts of upper mats. The lifting portions are configured such that a sling can lift a stack of mats.

A temporary manhole cover and its methods of use are configured to prevent an entire person from falling into a manhole, while providing a unique structure, adjustable in some embodiments, that allows access for a user to simultaneously reach through and/or pass objects through the temporary manhole cover when it is installed in a manhole. The structure may include an annular perimeter portion optionally having an L-shaped cross-section defining a circular interior opening there-through, a first set of two parallel laterally-separated cross-members each attached with and extending across the circular opening, and a second set of two parallel laterally-separated cross-members each extending perpendicularly between and attached with the first set of two parallel laterally-separated cross-members.

A pad site and a method for supporting a rig structure, of which the method includes positioning a plurality of piles in a ground of a core operating section of a pad site, and laying a plurality of mats over the pad site. A first portion of the plurality of mats are at least partially supported by the plurality of piles, and a second portion of the plurality of mats are not supported by the plurality of piles. The first portion of the plurality of mats are configured to support a rig structure.

The disclosed technology includes temporary support structures for use in the repair of a transmission tower. A typical transmission tower includes a tripod that receive the load of the tower and distributes it to piles embedded in the ground. A temporary support structure may temporarily remove the load of the transmission tower from the tripod to allow the tripod to be removed and replaced with a new tripod. A temporary support system may include a pile temporary support system, a beam support structure supported by the pile temporary support system, and a flower pot adapter lifting assembly configured to attach to a portion of the transmission tower to transfer a load of the transmission tower to the beam support structure.

Sediment-control fences that are structurally enhanced to prevent failure due to hydrostatic and hydrodynamic forces are disclosed. The sediment-control fences comprise a permeable geotextile material and reinforcing straps located at controlled heights. The reinforcing straps provide added strength and stiffness at key structural locations along the height of the sediment-control fence.

A fully recoverable modular steel footing and beam system that allows installation of the rapidly deployable prefabricated folding building system on a wide variety of substrates, including bare earth, existing asphalt, and existing concrete. The substrate may show deviation from level and still be accommodated. The invention also includes three-part folding haunch and ridge braces allowing braces to ship attached to building panels resulting in minimal handling, reduced weights, and ability to install roof and walls separately. Roof weight is reduced and so can be handled with a forklift or telehandler, as the only heavy equipment needed to erect the building. Flashings are insulated, factory cut, and drilled for bolts, in alignable pattern to bolt-receiving rivets installed in the corrugated siding and roofing. Bolts and bolt installation locations are color coded.

The present invention provides a method of installing a foundation for an offshore wind turbine and a template for use herein. In illustrative embodiments, the template is releasably anchored in a seafloor and the template is leveled before installing a pile. In a method according to some illustrative embodiments herein, a template may be provided, the template comprising at least one hollow guiding element for receiving the pile, at least one suction bucket, a frame body to which the at least one hollow guiding element and the at least one suction bucket are coupled, and controlling means configured to supply a pressure to the at least one suction bucket. The method may comprise disposing the template on the seafloor, supplying a negative pressure to the at least one suction bucket for driving the suction bucket in to the seafloor, and controlling the negative pressure supplied to the at least one suction bucket to adjusting a penetration depth of the at least one suction bucket so as to level the frame relative to the seafloor.