both under a tensile stress and under an impact stress the jacket tube 4 again comprises a longitudinal slot 8 and is offset or designed to have a reduced cross section in partial regions of its outer periphery such offset partial regions being denoted by 11 in fig3 thus only a partial abutment of the jacket tube 4 will be obtained particularly during the introduction procedure this being favorable to ensure a proper drilling progress for instance in the event of a high friction resistance to be expected between the outer periphery of the jacket tube 4 and the drill hole inner wall 7 from the further modified embodiment according to fig4 it is apparent that the jacket tube 4 is introduced into the interior of the drill hole 7 merely by exerting an impact stress on the anchor head 6 by the aid of the transition sleeve 10 while no tensile entrainment through a connection of the jacket tube 4 with the drill bit 1 is effected in this embodiment such an introduction of a jacket tube 4 by means of impact stress is feasible in particular in the event of an accordingly sturdier jacket tube or a jacket tube 4 exhibiting an elevated strength from the individual method steps illustrated in fig5 fig5 a shows the formation or production of the drill hole 7 while introducing the jacket tube 4 in a manner for instance similar to that of the embodiment of fig4 by exerting an impact stress on the anchor head 6 without any connection being provided between the jacket tube 4 and the.