Oikos Fuel Transfer Jetty 2 Repairs
Overview
- Client: Oikos Storage Ltd
- Project Value: £800,000
- Dates: August 2023 – September 2023
Oikos Storage Facility engaged GPS Marine and Civil Services (GPS MACS) to undertake repairs to Jetty 2 following a vessel strike earlier in the year.
Jetty 2, which was extended in 2018, is a deep-water fuel transfer jetty with the capacity to accommodate larger vessels, including LR2 tankers, up to 120,000 DWT with a draft up to 14.5 metres.
As part of the scope, GPS MACS was responsible for survey and inspection works to establish the extent of the damage sustained, as well as the fabrication and replacement of all damaged elements, including steelwork and electrical fixtures.
Working from the GPS Boxer Crane Barge, GPS MACS completed the onsite works working around Oikos shipping requirements, resulting in a jetty closure time of just 14 days, reducing the impact on the fuel supply into the terminal.
Enabling Works
Drone photogrammetry survey to identify damaged areas not visible by standard inspection, also used to confirm dimensions for fabrication of damaged elements
Eddy current and MPI weld inspections to identify unseen damage
Fabrication
Fabricated and delivered to site all the necessary steelwork, made to measure, painted and ready to install
2 x dolphin walkways, each over 5m x 5m area c. 4t
Intermediate walkway, 21m tubular support c. 10t
All materials delivered to site via barge
Marine Works
Mobilisation of 100t crane barge and a 28m supply barge
Recovery from the riverbed the damaged 21m tubular walkway by GPS MACS dive team
Existing Trelleborg smart-hook Capstan Units removed from their positions, stored safely and reinstated following completion of the works including safely re-torquing all bolts up to 6500Nm
2 x damaged dolphin walkways safely dismantled and recycled
All damaged steel brackets re-welded, tested and painted
2 x new painted steel and galvanised walkways lifted and fitted into place
Over 1000m of new cabling installed along jetty and wired into the existing system
Disposal
Removal from site, by barge, of all damaged steelwork for recycling
Design / Survey
GPS MACS undertook drone photogrammetry surveys to establish the extent of damaged members confirm new fabrication requirement
MPI and Eddy Current investigation on previous construction welds to assess their condition following the damage
Construction
Full replacement of all damaged elements and reinstatement of the jetty to the previous condition using 100t spudded crane barge
Engineering
Stability analysis for the barges
Planned, supervised, and carried out all works and lifting operations on site
Site engineering including quality assurance, setting out and surveying, drawings, coordinating works and planning of operations
Marine Logistics
Planned, supervised and carried out mobilisation of all marine plant to site due to no vehicle access
All works planned to reduce overall berth outage time
Barge operational manoeuvres inside and behind the Jetty 2 structure to allow for fuel vessels to continue to discharge
