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Joan breakthrough at Melbourne's Kensington
Tunnel Boring Machine Joan breakthrough at Kensington, Melbourne for Metro Tunnel construction. Since her launch in August 2019, Joan, named after former Victorian Premier Joan Kirner, has travelled 1.2 kilometres and installed 4,200 concrete segments to create 700 rings before breaking throug...Tags: Australia tunnelling
cover tunnel photo by: Matt Brown from London, England / CC BY
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