Acotec - Standard Cofferdams
With DZI Cofferdams, Acotec is able to restore and protect sheetpiles in submerged areas in active ports and canals without disturbing the port or canal activities. This means that this structure upgrade can be finished while a continued income of the structure is guaranteed for the client!
A cofferdam is provided with different safety features, dewatering equipment, underwater illumination, air separation equipment, liftable grit flooring, an automated electrical cabinet, ladders, adjustable sealings, etc…
The cofferdam can be attached to a wide variety of quay walls. The patented sealings attach themselves to a number of different structures. Alternative solutions can be found under ‘specials’.
The cofferdam can be used from the dockside with a crane or from a fully equipped barge from the waterside. This is most practical as all equipment travels along with the barge.
A typical setup starts after dewatering with cleaning of the biofilm and vegetation with high pressure water blasting. In cases where the marine growth is too strong, power tools are used. After cleaning, the corroded holes in the sheetpiles are closed by weld repairs. After sandblast and the proper surface preparation according to ISO12944 one-layer solvent-free modified epoxy coating, HUMIDUR®, is applied.