Method for producing an injection anchor in the ground and automatic post-grouting machine for the same

A method for producing an injection anchor in the ground, wherein

• a bore is created in the ground,
• a hardening material for forming a primary anchor foot is injected by means of an injection member at least in a partial region of the bore, and
• after partial, not yet complete, hardening of the material a post-grouting medium is introduced under pressure into a region of the primary anchor foot via a post-grouting member, by which medium the not yet completely hardened primary anchor foot is broken up and forms a secondary anchor foot having a size larger than the primary anchor foot,
• wherein
• an automatic post-grouting machine is connected to the post-grouting member, by which machine the post-grouting medium for breaking up the not yet hardened primary anchor foot is automatically introduced into the post-grouting member at a freely specifiable time, and
• the automatic post-grouting machine is provided with a control unit with a timeswitch, in which the freely specifiable time for carrying out the automatic post-grouting is input such that the automatic introduction of the post-grouting medium is carried out at the freely specified time without intervention by personnel.