Process and a device for making anchorages in soils and rocks

An apparatus for providing an anchorage for fastening a rod to soils, rocks or the like, said apparatus comprising an elongate anchorage sector and a free sector attached to one end of said anchorage sector, said anchorage sector comprising an upper ringed support member adjacent said free sector, a lower ringed support member and at least one intermediate ringed support member disposed therebetween, adjacent ringed support members being connected by a hollow tubular internal jacket and a hollow tubular external jacket disposed around said internal jacket, said jackets defining a tubular compartment therebetween, said intermediate ringed support member comprising:

• (a) a top portion, a bottom portion and a substantially cylindrical inner passage extending therebetween, said inner passage having a cross sectional area which is substantially co-extensive with and in communication with the hollow portion of said internal jacket whereby a longitudinal internal passage is formed which extends along substantially the length of said anchorage sector;
• (b) at least one radial injection passage extending between said inner passage and an external surface for providing fluid communication between said longitudinal internal passage and the exterior of said anchorage sector, said external surface having an elastic means disposed thereon at least in the vicinity of and covering said radial injection passage;
• (c) at least one longitudinal opening, extending between said top and bottom portions, adapted to receive a wire therethrough;
• and
• (d) at least one longitudinal injection passage extending between said top and bottom portions for providing fluid communicaton between adjacent compartments, said longitudinal opening, said radial injection passage and said longitudinal injection passage being non-communicating.