Helical Piles

The Thor Helical earth anchor comprises a copper helical profile with an effective 80mm stiffened by triangulation and incorporating a hard driving point. The anchors enlarged helical lead section interlocks with the ground, whilst the trailing circular copper extension tubes provide a slip plane within desiccated layers.

The helical faces emit planes of stress at tangents along the full helical embedment length, which serve to optimise performance at relatively shallow depths. This helical interlock action is best envisaged as a set of annular plates at helical pitch intervals.

The build up of load upon the anchor gives a reaction by which an accumulative cone of stress is imparted into the ground, the helical troughs limiting deflection under load. The helical form provides an even distribution of load along its full length, acting upon the cylindrical shear resistance of the ground at the notional circumscribed periphery of the helical fins.

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