An assembly to cut a hollow piling has a pressurized hydraulic fluid supply force to cut through a piling; a housing having a cavity to receive the hydraulic fluid, the housing having at least one cylinder wall; at least one piston assembly slidably disposed within the at least one cylinder wall configured to extend from the at least one cylinder wall in response to the introduction of pressurized hydraulic fluid into the housing cavity; a blade attached at a radially distal end of the piston assembly, whereby as the blade extends, a cutting force is applied to an encountered piling wall; wherein the blade edges are stepped/shingled on the upper and lower surface to allow overlapping of the blades when the blades are retracted. Spacers extend to a diameter equal to or beyond a blade tip diameter in its retracted position; and wherein the blade has a piercing point.

A cutting tool for truncating elongated structural members has a frame with a pair of parallel siderails connected at a first end by a support plate and at a second end by a removable end gate, the frame having an open center adapted to receive the structural member therethrough. The truncating is performed by a fixed penetrating blade mounted on and end gate open and a driven penetrating blade slidably disposed within the frame. Thus, the end gate has at least two penetrating blades pointing in opposite directions wherein the driven penetrating blade and the fixed penetrating blade have concave cutting edges relative to one another and configured to be adjacent to one another along the travel of the driven penetrating blade.

Assemblies to cut a hollow piling are provided, which may have a pressurized hydraulic fluid supply configured to supply enough force to cut through up to the circumference of a piling having a housing having a cavity to receive the hydraulic fluid, the housing having at least one cylinder wall; at least one piston assembly slidably disposed within the at least one cylinder wall configured to extend from the at least one cylinder wall in response to the introduction of pressurized hydraulic fluid into the housing cavity; and a blade attached at a radially distal end of the piston assembly, whereby as the blade extends through the cylinder wall, a cutting force is applied to an encountered piling wall.

A method for constructing a building on a water-body. The method includes piling a plurality of piles on a bed of the water-body for laying a foundation for the building. The method further includes marking a reference-mark on each of the plurality of piles at a predefined-distance from a surface of the water-body. The method also includes cutting each of the plurality of piles along the reference-mark. The method further comprises installing a first pile-cap, having a plurality of guiding elements extending therefrom, over a first set of piles of the plurality of piles. The method also comprises installing a second pile-cap over a second set of piles of the plurality of piles.

A milling head, having a rotation axis and which serves for machining a pile head of a pile that includes a pile core, a pile jacket and a metal armouring interposed therebetween, includes a coupling device, connected to a drive shaft of a driving device, a central milling cutter, which includes a plurality of central chisels mounted on a lower side of an inner ring plate, and a ring milling cutter, which includes a plurality of ring chisels mounted on a lower side of an outer ring plate, which central milling cutter and ring milling cutter are connected to each other coaxially aligned with the rotation axis, and which outer ring plate surrounds the inner ring plate separated thereof by a middle circular ring area. The inner ring plate includes at least one transfer opening leading from the lower side to the upper side of the inner ring plate.

Certain aspects of removing submerged piles of offshore production platforms can be implemented as methods. A top deck of a fixed offshore platform installed on a mudline of a body of water is removed. An upper structure of the fixed offshore platform is removed. The upper structure is below the top deck. A lower structure is secured to the mudline by one or more structural piles remaining. The one or more structural piles, which are housed within one or more members of the lower structure, are driven below the mudline. The lower structure of the fixe offshore platform is removed. The one or more structural piles are left below the mudline.

Certain aspects of removing submerged piles of offshore production platforms can be implemented as methods. A top deck of a fixed offshore platform installed on a mudline of a body of water is removed. An upper structure of the fixed offshore platform is removed. The upper structure is below the top deck. A lower structure is secured to the mudline by one or more structural piles remaining. The one or more structural piles, which are housed within one or more members of the lower structure, are driven below the mudline. The lower structure of the fixe offshore platform is removed. The one or more structural piles are left below the mudline.

A method for constructing a building on a water-body. The method includes piling a plurality of piles on a bed of the water-body for laying a foundation for the building. The method further includes marking a reference-mark on each of the plurality of piles at a predefined-distance from a surface of the water-body. The method also includes cutting each of the plurality of piles along the reference-mark. The method further comprises installing a first pile-cap, having a plurality of guiding elements extending therefrom, over a first set of piles of the plurality of piles. The method also comprises installing a second pile-cap over a second set of piles of the plurality of piles.

A pile cutter, suitable for cutting of steel reinforced concrete piles, has a frame with a pile receiving area and a generally U-shaped track around the pile receiving area. A single saw blade, for example a diamond tipped rotary saw blade, is carried on a saw blade carriage assembly, which is movably mounted on the U-shaped track. The dimensions of the various components are such that the saw blade cuts past a center line through the pile receiving area. By moving the saw blade carriage assembly first to one end of the U-shaped track, then to the other end, the pile can be completely severed.

A pile cutter, suitable for cutting of steel reinforced concrete piles, has a frame with a pile receiving area and a generally U-shaped track around the pile receiving area. A single saw blade, for example a diamond tipped rotary saw blade, is carried on a saw blade carriage assembly, which is movably mounted on the U-shaped track. The dimensions of the various components are such that the saw blade cuts past a center line through the pile receiving area. By moving the saw blade carriage assembly first to one end of the U-shaped track, then to the other end, the pile can be completely severed.