DSI Injection Anchors provide an effective temporary anchor that can be readily installed into loose or collapsing ground without the need for a casing. Rotary percussive drilling, combined with simultaneous grouting, ensures that the grout penetrates the surrounding ground to provide an increased level of bond.

All ground anchors should incorporate a fixed length (bonded in the stable zone) and a free length (debonded with a sleeve, in the wedge zone) to enable the anchor to be prestressed. The prestress provides an active restraint, enabling the anchor to resist service loadings without additional extension.

Hollow bar systems (irrespective of threadform) are only suitable as temporary anchors. Rotary installed bars cannot provide the level of corrosion protection necessary for permanent anchors working in tension (as outlined in current anchor standards: BS8081 & EN1537). For permanent anchors see DSI pregrouted anchors.