Bertha Tunneling to Resume 1 Month Later Than Planned

November 13, 2015 rockman Project Related Comments Off on Bertha Tunneling to Resume 1 Month Later Than Planned
The Bertha TBM after most of the repairs were completed

The Bertha TBM after most of the repairs were completed

The Seattle Tunnel Partners JV announced last month that tunneling on the Alaska Way Viaduct Replacement project will resume a month later than originally planned. The Bertha TBM will resume mining on December 23 after a unique repair operation involving an access shaft. The tunnel boring machine is currently undergoing testing, and a jet grouting operation to tighten up the ground in advance of the TBM was undertaken last month. [Source: More at WSDOT Alaskan Way Viaduct Page. Image: WSDOT Flickr]

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Tunnel Proposed to Link Europe and Africa at Straits of Gibraltar

February 26, 2008 rockman Project Related Comments Off on Tunnel Proposed to Link Europe and Africa at Straits of Gibraltar

The proposed railway tunnel will link Spain and Morroco underneath the Straits of Gibraltar.  The depth of the straits ranges from 1,000-ft to nearly 3,000-ft. To put that in perspective, the English Channel is only 150-ft deep, and the Chunnel is another 130-ft below the sea floor. (Photo by chodaboy)

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