Ground anchorage means utilizing a reinforcement or tie insulated from the ground

A ground anchoring device having a root portion adapted to be sealed in the ground, said root portion being comprised of a crenellated envelope with at least one tie rod therein adapted to be encased by a hardenable material, the crenellations of said envelope forming a helical thread to enhance the filling of said envelope with hardenable material and ensure a good transmission of force through said envelope, a free portion joined to said root portion and being comprised of a fluid tight sheath fluid tightly joined to said crenellated envelope and filled with a non-corrosive product, a material injection tube extending outside of and along said sheath and said crenellated envelope substantially over the whole lengths thereof and provided with spaced material injecting outlets for the injection of hardenable material therefrom, a distensible bag in an intermediate zone of said ground anchoring device and fluid-tightly secured at one end thereof to said injection tube and to said sheath and at the other end thereof to said injection tube and to said crenellated envelope, said bag being filled with hardenable material injected therein from said tube, and ground-sealing means for sealing said ground anchoring device at ground level with an anti-corrosion material.