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TBM emerges from one of world's longest drives

The Channel Tunnel Rail Link's Annie, one of two tunnel boring machines (TBMs) on the longest tunnel drive of its kind in the world, emerged at King's Cross in north London last month after a 7.5km, 17-month journey.

The 120m long, 1,100t earth pressure balance machine, built by Kawasaki Heavy Industries, passed beneath London Underground's Highbury and Islington underground station without disruption on its journey under the east London districts of Newham, Hackney and Islington.

Nishimatsu-Cementation Skanska joint venture, the main contractor for CTRL Contract 220, is working with Rail Link Engineering, CTRL's project manager and designer, to complete the longest stretch of underground tunnelling for the high-speed link.

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