Process, anchoring member, and clamping device for clamping a rod

An anchoring member for anchoring a rod, the rod being anchored in rock for securing the same, the rod having a free end protruding from the rock, said anchoring member comprising:

• (a) a tubular body having sawtooth configured grooves in an axial passage opening and adapted to engage with sawtooth configured grooves on the free end of the rod;
• (b) a plurality of radially projecting ribs molded onto said tubular body and extending in an axial direction, each of said plurality of ribs being U-shaped in cross-section;
• and
• (c) a plurality of slots extending in an axial direction and thereby subdividing said tubular body into a plurality of segments, wherein said ribs are elastic and connect said segments to one another such that said segments are flexible relative to one another in a tangential direction but nonflexible relative to said ribs in a radial direction.

A prestressing device for prestressing a tie rod while simultaneously forcing an anchor member, mounted on the tie rod, against an anchor plate, the tie rod being anchored in rock for securing the rock, said prestressing device comprising:

• (a) a housing including an anchoring element having sawtooth configured grooves and which is moved in an axial direction and adapted to engage with sawtooth configured grooves of the tie rod at an end section in the vicinity of a free end of the tie rod;
• (b) a supporting element connected to said housing and including a coaxial opening through which the tie rod is passed, said supporting element adapted to rest exclusively against the anchoring member mounted onto the tie rod;
• and
• (c) an actuating member for moving said anchoring element in an axial direction relative to said supporting element.