Method for reinforcing a metal tubular structure

A method for reinforcing a metal tubular structure in operation, the metal tubular structure being installed so as to have an anchored lower end and a free upper end, the method comprising:

• introducing inside the metal tubular structure from said free upper end in operation, a plurality of substantially linear elements having a tensile strength greater than a predetermined value, the substantially linear elements of said plurality being introduced inside the metal tubular structure via respective holes of a mesh connected to the metal tubular structure and via respective holes of a movable member, the holes of the movable member being distributed in a manner substantially corresponding to the holes of the mesh;
• anchoring the substantially linear elements on the mesh;
• lowering the movable member by its own weight with the aid of a cable, from the mesh toward the lower end of the metal tubular structure so as to form a bundle of substantially linear elements having a predetermined geometrical distribution;
• and
• injecting a curable filling product inside the metal tubular structure in operation, so that the curable filling product comes into contact with an internal surface of the metal tubular structure in operation and coats the substantially linear elements of said plurality.