The secondary lining of London’s super sewer’s 7km western section has been completed, marking a significant milestone for the Tideway project. The secondary lining works in the western section began in March 2021, and the journey from Acton to Fulham in southwest London required more than 800 individual concrete pours.
The concrete was batched on-site at the Carnwath Road Riverside site in Fulham. It was delivered to the six shutters via bullet concrete trains to a pump on a logistics crossing within the tunnel.
The secondary lining in this section of the tunnel was constructed using approximately 48,000m3 of concrete. “This is a fantastic achievement for everyone involved,” Tideway project director Sally Cox said. I am in awe of the team’s boundless energy and perseverance. This has helped me overcome obstacles in order to complete this phase of work. It’s amazing what you can accomplish when you have such a great team.”
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London’s super sewer project will capture more than 95% of the sewage spills that enter the Thames
The secondary lining is required to strengthen the super sewer. Furthermore, it will create a smooth surface for flows to travel once the sewer is operational in 2025. The tunnel boring machine Rachel completed the main drive of the 6.9m internal diameter, 7km tunnel in late 2020. The team is now preparing the site for the secondary lining of the main shaft at Carnwath Road Riverside.
BMB, a partnership between Bam Nuttall, Morgan Sindall, and Balfour Beatty, is in charge of the western section. Costain, Vinci Construction Grands Projets, and Bachy Soletanche are the contractors on the east area of the Tideway project. FLO, a joint venture between Ferrovial and Laing O’Rourke, is carrying out the work in the central section. In April, the primary lining for the entire sewer was completed.
The new sewer system is intended to capture more than 95% of the sewage spills that enter the Thames from London’s Victorian sewer system. It will have a significant impact on water quality. Thus, it will create a much healthier environment for wildlife to survive and thrive in.
