Client: DIO - HMNB Portsmouth
Contractor: Volker Stevin
Duration: 7 weeks
Contract Value: £200,000
Date posted: 25-10-2017
Survey works to upgrade the facilities in HMNB Portsmouth so it can accommodate Britain's second aircraft warship is under way.
The Base-Port Infrastructure Project on Victory and Sheer Jetties started with a condition and topographical survey consisting of a visual inspection of the tubular and raker piles.
MMC divers had to identify and record the location and size or extent of any visible defects or features, from holes, biological corrosion, pitting, damage to welds, orange staining, along with any attachment of secondary steel elements or collars, and the presence of coatings or protective wraps.
MMC Divers undertook a number of ultrasonic steel thickness measurements of the residual coating (dry film) in accordance with ISO 2808, using non-destructive means.
The divers gauge compensated for the thickness of any residual coatings and corrosion products on both the internal and external faces to provide the wall thickness of the structural steelwork.
This involved using a multiple-echo approach, with single echo or echo-echo test methodology. MMC also supplied safety vessels for the tidal works, along with barges and work boats for under the jetty works during the operations for concrete chloride sampling.
In preparation for the arrival of the second new aircraft carrier into Portsmouth Harbour Navy Base, everything which services these huge vessels need to be bigger to meet there demands.
This programme upgrade has confirmed the future of the Portsmouth Naval Base for the next 50 to 80 years. It is now the only port which can fully support HMS Queen Elizabeth and Prince of Wales and meet all their needs.