Frankham was appointed to carry out a structural inspection on a jetty on the River Humber.
- Associated Petroleum Terminals
- £10m
The conditions on the River Humber were the biggest challenge.
The Humber has a tidal range in excess of 6m. Inspections were targeted during both low and high tides to ensure that the piles were inspected within shifts, with our dive team utilised for any below water inspections.
The challenging weather conditions also proved difficult. Our team members took safety precautions and came prepared with appropriate clothing to persevere through the conditions.
The inspection formed a vital part of asset management of the jetty. The inspection and subsequent condition report highlighted defects and recommended repairs to the jetty that would help extend its design life.
Extending the design life is a solution for a more sustainable approach to asset management. Since it prolongs the need for a more extensive refurbishment or demolition of the jetty, which could waste materials and contribute to the climate crisis.
Our engineers discovered accelerated low water corrosion (ALWC) or microbially influenced corrosion (MIC) on some steel piles during inspections. ALWC is a lesser known phenomenon which can cause catastrophic damage if left unchecked. Frankham takes the opportunity to raise awareness of this defect where we can.
ALWC is an aggressive form of corrosion caused by bacteria that can severely impact structural integrity of marine infrastructure. It can be found in unprotected areas of tidal waters and is typically found at the lowest astronomical tide level and below, hence the long-winded name.
Remedial strategies are driven by the extent of damage caused. Low damaged areas can be protected by cathodic protection systems or coating whereas highly damaged areas may require local plate repairs in addition to protection.
CEng MICE BEng (Hons)
