Abstract：Based on the actual damage to the steel pipe piles in Tianjin Port Alliance International Container Terminal，this
paper makes technical and economic analyses of repair technologies of heavy-duty anti-corrosion coatings and encased anticorrosion
wrapping from the aspects of technical characteristics，field implementation, maintenance in latter period，repair costs，
etc. From the comparison，the encased anticorrosion wrapping technologies （new PTC wrapping and cold-applied petrolatum
tapes） were used to repair the coatings of steel pipe piles tidal zones.