Case Study Overview
The construction of the container terminal was supported by four of Red7Marine’s jack up barges; the Haven Seariser 1, Haven Seariser 2 and the Haven Seariser 3 and the Haven Seajack.
At a glance
- Location: Port of Liverpool, Liverpool
- Plant used: Haven Seariser 1, Haven Seariser 2, Haven Seariser 3, Haven Seajack
- What we did: Red7Marine was the Marine Partner of Choice for BAM Nuttall when they constructed the piled combi-wall as part of the Liverpool 2 Dock Expansion that began in 2014.
The port of Liverpool has one of the largest tidal ranges in the UK coupled with an uneven riverbed profile. With an exposed estuary entrance, the weather was carefully monitored during the project to minimise any potential delays in vessel movements.
The original method chosen by the client was to install the piles using the pile top drilling process. Red7Marine designed and fabricated two large modular piling gates to facilitate the installation of the tubular steel piles. The modular piling gates were installed on two jack up barges to allow uninterrupted progress during the pile installation. Due to local ground conditions and adverse weather, the method was eventually changed to install the piles in rock sockets. Rotary drilling rigs were loaded onto the Haven Seariser 1 and Haven Seariser 3 jack up barges, drilling out the rock sockets within casings before the tubular piles were installed and grouted in position.
The Haven Seariser 2 and Haven Seajack followed behind the other jack up barges to install sheet piles between the steel tubes forming the combi-wall structure and provide over water lifting where required.
Red7Marine were able to quickly respond and adapt the marine plant to reflect the change of installation method. Working closely with BAM Nuttall on a daily basis throughout the construction works allowed for a fully integrated approach to co-ordinate vessel moves and maximise utilisation of the marine equipment. Engineers at the head office supported the site team supplying revised deck plans, site specific assessments and stability calculations as and when required by the client.
Managing Director at Red7Marine, Nick Offord comments “This project is an excellent example of Red7Marine’s integrated consultancy, project planning and marine expertise when working in harsh marine locations. The site team operated to the highest safety standards throughout the project to support our client with a challenging project.”
Red7Marine responded quickly to the requirements the project presented and changed the methods of installation to ensure the safe completion of work.
Red7Marine liaised with the client on a daily basis throughout the construction in a fully integrated approach to coordinate the operations and vessel movement.
Red7Marine designed two bespoke large modular piling gates to facilitate the installation of the tubular steel piles.
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