rescue shaft – GeoPrac.net

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ADSC Foundation Drilling Magazine - January Cover

Bertha TBM Access Pit Excavation Complete

February 9, 2015 rockman Comments Off

The excavation has been completed for the access shaft or rescue shaft that was needed to be able to remove the damaged cutterhead of the Bertha TBM on the Alaskan Way Viaduct Replacement project in […]