Tunnel Boring Machine ‘Dorothy’ Achieves Milestone Breakthrough in England

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A milestone breakthrough of tunnel boring machine “Dorothy” was recently celebrated as the giant cutterhead broke through the wall of the Long Itchington Wood Tunnel south portal in Warwickshire (England). The general contractor on the project is Balfour Beatty VINCI. Launched in November 2022, the 2,000 ton TBM has completed its one-mile second bore, making it the first complete twin-bore tunnel on the High Speed 2 project. After completing the first bore of the tunnel in July 2022, the 125-meter-long TBM was dismantled and returned to the north portal where it was reassembled ready to start its second journey. Members … Read more

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CPB Contractors to Deliver Victoria’s West Gate Tunnel Project

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Workers have started clearing the site where tunneling will begin for Australia’s West Gate tunnel project. Contractors will dig down more than seven stories, clearing the way for the project’s two tunnel boring machines. Major construction work is expected to start in early 2018 with the project scheduled to open to traffic in 2022. The project contract was awarded to Hochtief’s CPB Contractors and John Holland. Another work site will be established nearby later this year, with the two sites connected by an elevated heavy-duty, covered conveyor belt. The conveyor will transport materials from the TBM excavation to large sheds, to … Read more

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