Method and apparatus for cutting underwater structures

A method for the cutting of underwater structures below the level of the sea bottom on which they are installed, comprising:

• determining an ideal plane of cutting, having considered the characteristic features of the structure including its morphology and its positioning on the bottom, the shape and consistency of the bottom itself, and the depth below the level of the bottom at which the cut must be effected;
• positioning and anchoring of a cutting means in proximity of the cutting area;
• wherein the positioning and the anchoring of the cutting means is effected on the bottom in proximity of the structure to be cut;
• obtaining at least one perforation or boring in proximity of the structure through the bottom at least up to the predetermined level for the cutting of the structure, along a direction parallel to the cutting direction;
• introducing the cutting means inside said perforation or boring;
• and
• cutting of the structure.

An apparatus for cutting underwater structures below the level of the sea bottom, said apparatus comprising:

• means for perforation or boring;
• means for cutting having a cutting frame and one movable cutting unit said cutting frame comprising a plate onto which there are hinged two guides parallel and connected between each other, provided with adjustment means of the inclination with respect to said plate, said perforation means and said movable cutting unit arranged longitudinally movable on said guides, said plate being connected with supporting means;
• means for positioning said perforation means, said cutting means and anchoring means;
• wherein said means for perforating or boring are associated with said cutting frame and the positioning means of the cutting means and of the perforation means are the same.