Double Corrosion Protection Cable Anchors are used for permanent anchoring and these have long service life and recommended for aggressive environments. In this system, a corrugated sheathing of high strength HDPE is installed over full length of anchor. The annular gap between anchor and HDPE is filled with grout before installation of anchor.
During the process of stressing of anchors, a short length of the anchor is left free from sheathing for the purpose of stressing anchorage. To prevent this short length from corrosion, the steel pipe is welded to anchor plate and is filled with corrosion protection material.