Abstract: The invention relates in particular to a device for producing tie-rods anchored in the ground, which comprises a tubular protective element comprising a top part and a base part and provided on its base part with at least one injection aperture, and at least one element constituting a tie-rod situated inside the tubular element, wherein the part of the element constituting the tie-rod extending along the top part of the tubular element is surrounded by a protective casing, with lubricant inserted between the element constituting the tie-rod and the casing.