This is an interesting video of crews changing cutterhead teeth on the Bertha TBM beneath downtown Seattle. [Source: WSDOT YouTube Channel. Image: YouTube]
Video: Changing cutting tools on Bertha TBM
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Los Olmos Tunneling Resumes
The construction of a 20-km tunnel that travels some 6,900-ft below ground has finally restarted after being broken down for several months after being damaged by a rock burst. The Los Olmos tunneling project will […]
Miscellaneous
Obayashi Corp Making It’s Mark on US Tunneling Jobs
Tunneling Business Magazine has a very nice cover story on Obayashi Corp, a well-known Tokyo, Japan-based mega-construction company with some impressive tunneling credentials. In their 30-years of working in the US, they were the first […]
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A Novel Approach at Niagara: Robbins TBM Stands Up to Challenging Ground with Custom Lining and Ground Support
This article describes the challenges faced by the World’s largest hard rock TBM (47.2-ft in diameter) as it tunnels through some very difficult geology while constructing a massive tunnel under Niagara Falls for hydroelectric power […]