Tag: Bertha: Page 2

Roadbuilding
As Bertha visits the dentist, a look at how this machine digs and builds the SR99 tunnel at the same time
Bertha, the world’s largest and perhaps most beleaguered tunnel boring machine, has been halted deep below the streets of Seattle once again. But this time the stoppage is for routine maintenance following significant progress. Plus, the stoppage gives us an opportunity to look at an often overshadowed portion of this project: construction of the State Route […]
July 18, 2016
While Bertha’s cutter head digs deep below Seattle, her rear end places giant pieces of concrete to form the circular frame of the tunnel.
Roadbuilding
Bertha will soon begin digging below the viaduct its path will replace
The world’s largest tunneling machine will soon begin its dig beneath the Alaskan Way Viaduct in Seattle, its first activity since mid-March. In January tunnel-boring machine Bertha broke through its repair wall following two years of down time only to be brought to a halt once again later that month at the order of Washington Gov. […]
April 27, 2016
A March 2016 photo from the WSDOT looks north toward the back end of Bertha, the SR 99 tunneling machine. The steel hooks on both sides of the circular wall of the tunnel will become part of the foundation that will support the decks and walls of the future roadway inside the tunnel.
Roadbuilding
Bertha back to drilling after suspension is “conditionally lifted”
Bertha hasn’t been blessed with the best of luck in Seattle, but the world’s largest tunnel boring machine is back to drilling again for now. The Seattle Tunnel Partners announced that the Washington State Department of Transportation has decided to conditionally lift the suspension for cause that Gov. Jay Inslee enacted in January following the formation of a sink […]
February 26, 2016
A worker with Seattle Tunnel Partners watches as co-workers are lifted out of Bertha’s repair pit Dec. 15, 2015. With repairs complete, crews filled the hole in in order to begin tunneling with the machine after a 2-year delay. Photo Credit: WSDOT Flickr
Roadbuilding
Washington governor halts Bertha tunneling after sinkhole forms
Bertha didn’t get back to work for long. Washington Gov. Jay Inslee has put the brakes on the massive tunnel boring machine once again after a sinkhole formed. According to King 5, Inslee announced on Thursday that the machine boring the tunnel for the new State Route 99 in Seattle had to be halted over safety […]
January 18, 2016
A worker with Seattle Tunnel Partners watches as co-workers are lifted out of Bertha’s repair pit Dec. 15, 2015. With repairs complete, crews filled the hole in in order to begin tunneling with the machine after a 2-year delay. Photo Credit: WSDOT Flickr
Roadbuilding
Bertha breaks through repair wall and begins tunneling soil once more
It’s taken two years in repairs and delays, but Bertha has broken through her concrete repair pit. The Washington State Department of Transportation said in a press release last week that the world’s largest tunnel-boring machine had broken through the pit and mined 73 feet in a little more than three weeks. The Seattle Tunnel Partners were […]
January 13, 2016
A worker with Seattle Tunnel Partners watches as co-workers are lifted out of Bertha’s repair pit Dec. 15, 2015. With repairs complete, crews filled the hole in in order to begin tunneling with the machine after a 2-year delay. Photo Credit: WSDOT Flickr
Construction Equipment
The Top 15 Construction Equipment and Truck stories of 2015
The past 12 months have been fun for everyone here at Equipment World. We integrated with our sister site Better Roads, upped the amount of content we produced every day, covered more events and trade shows, reached more people through social media and saw record traffic to the site. That’s mostly because we’ve got such great readers. […]
December 29, 2015
Top 15 of 2015
Construction Equipment
Bertha, world’s largest tunneler, resumes digging below Seattle after 2-year delay
Though the contractor behind the Washington state Highway 99 project said it might give crews a holiday break before resuming the dig, Bertha, the world’s largest tunnel-boring machine, made its first progress in two years deep below Seattle last week. According to an announcement from the Washington State Department of Transportation, Bertha moved forward 1.5 feet Dec. 22, giving […]
December 28, 2015
A worker with Seattle Tunnel Partners watches as co-workers are lifted out of Bertha’s repair pit Dec. 15, 2015. With repairs complete, crews filled the hole in in order to begin tunneling with the machine after a 2-year delay. Photo Credit: WSDOT Flickr
Roadbuilding
Bertha is nearly ready to start tunneling again
The massive tunnel-boring machine that’s been sidelined in Seattle for two years could be back to boring by New Year’s. The Washington State Department of Transportation announced that the Seattle Tunnel Partners had begun the final preparations before drilling gets started again with soil and sand being poured into the 120-foot-deep access pit on Sunday. Bertha […]
December 17, 2015
In March, Bertha chewed through the pit wall and parked to be prepared for repair. Credit: WSDOT Flickr
Roadbuilding
Bertha delayed again; won’t restart drilling until late December
The Seattle Tunnel Partners have once again delayed the restart of drilling for the State Route 99 tunnel, with Bertha not expected to start work again until Dec. 23. The Washington State Department of Transportation announced the revised schedule Thursday and said the tunnel most likely would not open until April 2018. That puts the project two years and four […]
October 26, 2015
Crews put the final touches on piecing Bertha’s front end back together after extensive repairs to the machine.
Roadbuilding
Crews prepare soil for Bertha to begin tunneling again
One of the last steps to getting Big Bertha back to boring beneath Seattle is underway. The Washington State Department of Transportation announced October 14 Seattle Tunnel Partners would begin doing jet grouting in the soil to stabilize the ground above where the massive tunnel-boring machine is set get to work. With jet grouting, a mix of […]
October 16, 2015
Crews put the final touches on piecing Bertha’s front end back together after extensive repairs to the machine.
Roadbuilding
Board rules WSDOT should have given contractor more warning about pipe struck by Big Bertha before stall
In regard to the drilling of the new State Route 99 tunnel below Seattle, the Washington State Department of Transportation (WSDOT) has few friends left. There remains disagreement between the department and the city of Seattle over who will pay to repair a water main damaged during the excavation of a repair pit for Big Bertha, […]
May 12, 2015
Big Bertha in repair pit WSDOT
Roadbuilding
Water main damaged by Big Bertha repair excavation could cost WSDOT $4 million
Four months after crews temporarily stopped excavation on a repair pit for the world’s largest tunnel-boring machine due to ground sinkage, Seattle officials have now identified a major repair needed on a water main damaged by the sinking. Back in December, excavation stopped on the repair pit through which Big Bertha’s massive cutterhead was recently lifted as officials suspected groundwater pumping […]
April 14, 2015
Big Bertha in repair pit WSDOT
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