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TBM Tunneling in Mixed Ground Conditions
I think it is a bit infotarial but nevertheless informative article.
https://tunnelingonline.com/tbm-tunneling-in-mixed-ground-conditions/
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://tunnelingonline.com/tbm-tunneling-in-mixed-ground-conditions/
TBM Tunneling in Mixed Ground Conditions
tunnelingonline.comWhat happens when we are faced with mixed face and difficult ground conditions along the tunnel alignment is the subject of this article.