Beurteilung von Fels als Befestigungsuntergrund für nachträgliche Befestigungen mit geringer Einbindetiefe.

Assessment of rock as a fastening foundation for post‐installed fastenings with shallow embedment depths For rock as a base material for post installed anchors, it is difficult to draw conclusions about the load‐bearing behavior and capacity in advance due to the large number of possible installation parameter. This technical article therefore examines how post‐installed anchors with low embedment depths behave in rock and which rock parameters have a significant influence on the load‐bearing behavior and capacity. For this purpose, tests on anchors with different operating principles (injectable adhesive anchor, mechanical bolt anchor) in different geologies in Eastern Austria were performed. It could be shown that rock classification can be used to infer the suitability of a rock as a base material, but a small‐scale investigation also is necessary to estimate the load‐bearing capacity. Not only the presence of joints has an influence on the load‐bearing capacity, but also the joint condition. Certain analogies to cracked concrete could be shown. [ABSTRACT FROM AUTHOR]