HS2 TBM 'Florence' breakthrough after boring 16km long Chiltern tunnel.
...t, the HS2 TBM 'Florence' breakthrough after boring 16km long Chiltern tunnel. Florence is one of the 10 giant Herrenknecht Tunnel Boring Machines that are used. Photo has dat...tps://mediacentre.hs2.org.uk/news/breakthrough-for-hs2s-longest-tunnel https://mediacentre.hs2.org.uk/r...China Railway Tunnel Group TBM breakthrough at Georgia Gudauri Tunnel
China Railway Tunnel Group (CRTG) TBM breakthrough at Georgia Gudauri Tunnel photograph is press release of CRTG https://www.prnewswire.com/news-releases/successful-breakthrough-of-gudauri-tunnel-in-georgias-north-south-corridor-kk-highway-project-302124845.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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