Reply on topic: Why are all tunnels not excavated via Tunnel Boring Machines?
@Arash You are right. Cost is not the only reason why you may want to go for non-TBM tunnelling. As you have pointed out there are some other important considerations in favour of conventional tunnelling.Reply on topic: Replacing London's Tower Bridge with a Tunnel
https://www.ianvisits.co.uk/blog/2020/04/08/unbuilt-london-replacing-tower-bridge-with-a-tunnel/Tunnelling to the future - The Future Circular Collider tunnelling project in Switzerland
The proposed Future Circular Collider (FCC) would constitute the largest tunnel ever constructed at CERN and be considered a major global civil-engineering project in its own right. https://cerncourier.com/a/tunnelling-to-the-future/Reply on topic: Las Vegas announces the approval for the Loop extension
https://www.lasvegasnevada.gov/News/Blog/Detail/boringcompany
cover tunnel photo by: Matt Brown from London, England / CC BY
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