Proceedings of DFI-India 2018: 8th Conference on Deep Foundation Technologies for Infrastructure Development in India, (DFI)
Recognized Corrosion Protection Methods for Permanent Ground Anchors
Chris Irvin, Devon Mothersille and Rajiv Pandey
Ground anchors are widely used in civil engineering for retaining wall tieback and uplift restraint in deep basements as well as a range of other applications where traditional construction methods are either unsuitable or uneconomic. The ability to provide active restraint using a stressed tendon offers significant benefits in reducing the size and weight of the structure. Recent projects in India include the Sivok-Rangpo Tunnel and the Middle Bhotekoshi Hydro-Electric Project in Nepal, utilized permanent anchors with double corrosion protection to fulfill the required lifespans of the structures. For permanent ground anchors with lifespans up to 120 years, durability in the form of corrosion protection is critical, as failure through insufficient corrosion protection is unacceptable. Applying the correct corrosion protection is one of the most misunderstood principles in ground anchoring practice. This paper seeks to highlight the pitfalls of incorrect corrosion protection methods, as well as outlining and updating recognized corrosion protection principles in accordance with internationally recognized ground anchor standards.
|article #3153; publication #1050 (India2018)|