Retractable/ Removable ground anchors

Retractable/ Removable ground anchors

These are temporary anchors which can be retracted after permanent construction.
The anchors feature strands which have been specifically heat treated at a point just above the bond length, to induce a rupture point. Removal of the anchor is achieved through the loading of the strands to failure, at the rupture point. Strand movement is contained by a steel cap at the point of the jack. Following strand rupture all the strands can be withdrawn, with only short sections of strand remaining at the base of the borehole which can be easily removed during future land development.

These retractable anchors have a high advantage. They eliminate strutting system to provide lateral support to retaining wall; provide ample headroom and width for work in construction pit; the ground anchors can be retracted after completion of the permanent structures; they are economic and quick to install. Removable strand anchors are typically employed in built-up areas where easement restrictions apply for anchor access.

Alternatively other methods are adopted from the one mentioned above for retraction. These anchors are either tensioned to design forces or min load (10% of ultimate capacity of anchors). Anchors develop the required force during its deformation of the system to which it is applied