Rectification Works to Piles of Exxonmobil Berth

The existing steel piles of the wharf were found badly corroded at the splash zone and underwater. It was essential to conduct rectification, and repair works to restore their structural capacity and ensure that they can withstand harsh environmental conditions, including exposure to chlorides from seawater in both permanently submerged and splash zone areas.

The repair and rectification methods were tailored to meet the specific needs and budget of the client in each case. The type 1 repair was carried out on the badly corroded piles, which were strengthened to sustain the deck’s self-weight. Perforation in the steel piles had to be repaired with a quick and durable solution before grout infilling. For the ease of installation underwater and for high durability and corrosion resistance, the TYFO^® Fibrwrap^® Composite System with underwater epoxy was preferred over the steel plate. After sealing the perforations on piles with the TYFO^® System, the hollow piles were infilled with grout.

The rest of the damaged piles were covered by type 2 repairs, in which concrete casing was used to fully restore their capacities. The perforations in piles were sealed with the TYFO^® Fibrwrap^® Composite System. For the concrete casing, a cast-in-place underwater solution was adopted. For quick and easy installation and dismantling in the water, TYFO^® Fibrwrap^® formwork was chosen as the formwork for grouting. With the formwork in place, the concrete casing was grouted using a tremie pipe.

Fibrwrap Construction Pte Ltd designed the TYFO^® System and deployed trained personnel to complete the work underwater, ensuring the client received the highest quality of work.