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Tag: tunneling: Page 2
Construction Equipment
Big Bertha, world’s largest tunnel-boring machine, lowered into starting position in Seattle
With the digging of the Washington State Route 99 tunnel in Seattle scheduled to start in July, the Washington State Department of Transportation recently lowered the head of Big Bertha, the world’s largest tunnel-boring machine, into the pit that will serve as its starting position. Bertha made her triumphant arrival in Seattle at the beginning of April […]
June 5, 2013
Roadbuilding
Failing Culverts — Solution Options with special attention to the option of tunneling
Since corrugated metal pipe (CMP) was first introduced for culvert applications, untold miles of CMP have been installed across the country. These original (and more recent) culvert installations are now failing at an alarming rate and any failure can cause untold damage. State DOT’s (Department of Transportation) are increasingly facing the challenges of deteriorating culverts, […]
November 7, 2009
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