Screwpiles are ideally suited to marine environments where installation is conducted from land for shoreline and short jetty applications, barges for extended piling works and underwater hydraulic systems utilising divers and specialised marinised equipment for mooring and sub-seabed anchoring points.
Corrosion issues are addressed much like every other steel section used in these conditions. Naturally, the most corrosive environment is where a pile is subjected to salt spray splash zones or tidal exposure levels. The combination of salts and oxygen on steel require a quality corrosion protection such as two-pac urethane or epoxy coatings or tar tape protection such as Denso Wrap. Hot-dip galvanising may be sufficient protection in some applications or it may be combined with other protective coatings.
Typical marine applications include:
Note: Screwpiles are not suited where the piles are required to found into limestone unless there is sufficient overburden marine bed strength to accommodate the lateral design loads for the piles.