Pull Out Test Anchor/Rockbolt

During a pull-out test, first the confining pressure is applied to the rock sample and then the jack is put into operation. Note that as the bolt is pulled out of the rock borehole, the embedment length decreases. The tests are conducted in static conditions and under displacement control (constant displacement rate). Pull-out tests are typically performed to assess the anchorage or pull-out capacity of geosynthetics. This capacity is important in situations such as retaining walls, slopes and bridging over voids, where the geosynthetic is anchored into stable ground that is outside the zone of failure.