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Bertha of Japan: The world's largest EPB TBM ever produced.

    Santiago Morales
    By Santiago Morales Replies (1)

    Remembering the world's largest earth pressure balance tunnel boring machine made by Japanese company Hitachi Zosen Sakai Works of Osaka. 

    17,5 meter in diameter. What a marvel!

    http://worldkings.org/news/weird-but-true/worldkings-worldkings-news-bertha-japan-world-s-largest-earth-pressure-balance-tunnel-boring-machine

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    TBM Spotting

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    cover tunnel photo by: Matt Brown from London, England / CC BY

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