Rock Anchors

Rock Anchors are structural members used to provide temporary or permanent resistance to a structural element by pre-loading and lock-in tension load.  These anchors are installed by drilling into the rock and resistance loads are achieved by the development of friction between rock and grout interface.  The structural member (reinforcement) is typically a solid bar that is set into the drilled hole and grout is applied by tremie method.  When high capacity loads are specified, strand anchors typically are more economically and when anchor depths exceed 80 feet.