Ground anchors are commonly used in retaining wall tie backs, resistance to landscape sliding and structure overturning. Ground anchors transfer tensile loads, using high strength steel bars or steel strand tendons. They consist of an anchor head, a free length and a bond length, they can temporary or permanent designs based on applications. Rockend drilling anchoring systems consist of:

• Multi strand anchors

• Soil nails

• Rock anchors

• Self drilling anchors or hollow bars

PROCESS

A full-length hole is drilled through the soil and into the bond zone in soil or rock, using temporary casing if necessary. Threaded bar or strand tendon is inserted into the hole and the hole is filled with high-strength grout from the bottom up using a tremmie pipe. Any casing used is then extracted. Bond breaker covers the length of bar or strand above the bond zone to eliminate load transfer there. if necessary post grouting of the bond length can be done after few hours in order to increase the bond with the soil or rock.

Finally, the anchor head is tensioned or stressed in a controlled manner to ensure the load capacity is as required and then connected to the structure requiring the support. Post grouting can be done after few hours if necessary.

APPLICATIONS

• Excavation support

• Temporary or permanent slope stabilisation

• Tie down applications for permanent structures