Multi-Stage Strand Anchor Stressing

A system of multiple jacks is utilised for the stressing of DYWIDAG Multi-Stage Anchors.

The staging of bond lengths, within the fixed anchor length, produces a range of free lengths.

During stressing, each strand exhibits a different rate of extension in proportion to its own length.To accommodate the different rates of extension, whilst ensuring that each strand is equally loaded, a system of pressure-synchronised jacks is used. Each jack is connected via a manifold to a central pump, ensuring equal pressure in all of the jacks.