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Super sewer’s TBM breakthrough

London super sewer’s joint venture (JV) partners have seen the first tunnel boring machine (TBM) break through the ground to complete a tunnel section.

TBM Charlotte – a 3 m wide, 70 m long machine – is digging the Frogmore Connection Tunnel from Wandsworth to Fulham as part of the Thames Tideway Tunnel project, which aims to clean up sewage pollution in the River Thames.

The 1.1 km tunnel will take sewerage overflows from King George’s Park into the main 25 km super sewer at Fulham before being transferred for treatment to east London rather than polluting the Thames.

The 500 m southern section of the Frogmore Connection Tunnel is now complete and Charlotte will commence the tunnelling section for 600 m north to Fulham once being lifted from the shaft and taken back to Dormay Street.

JV Project Director Sally Cox said the breakthrough marks another key step towards a cleaner waterway.

“Despite being the smallest TBM on the Tideway project, Charlotte is creating vital infrastructure that will benefit Londoners and their river for many years to come,” said Ms Cox.

“Our tunnelling team has done a fantastic job getting this machine to King George’s Park and will now focus on completing the northern section of the Frogmore Connection Tunnel.”

With four tunnelling machines in the ground, 8 km of the Thames Tideway Tunnel has been built including the near completion of the first section of the main tunnel as tunnelling machine Millicent approaches Fulham after tunnelling nearly 5 km from Battersea.

JV partners Balfour Beatty, Morgan Sindall and BAM Nuttall anticipate the project will be completed by 2024.

For more information visit the Balfour Beatty website.

If you have project news you would like featured in Trenchless International contact Managing Editor Chloe Jenkins at cjenkins@gs-press.com.au 

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