Soil nails and anchors

Engineering steep slopes and anchoring Retaining Walls.

Ground anchors have a range of applications in civil engineering and building projects, such as supporting some bored pile retaining walls, stabilising rock faces, tunnel portals and marine structures such as dock walls.

A recent development has been the introduction of multistage anchors. These improve efficiency and achieve high loads in poor ground through the use of multiple discrete unit bond lengths.

Anchor bores can be drilled using a variety of techniques including rotary, topdrive rotary percussive, down-the-hole hammer, and augers. The type of drill rig used will depend on the access, working room and ground conditions. Bar anchors are inserted into the bore and grouted in place. Multi-strand anchors are inserted, grouted and then post-tensioned to a set load.