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Tag: Big Bertha: Page 2
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
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
Roadbuilding
PHOTOS > Big Bertha gets her head together: How to repair the world’s largest tunnel machine
With the final repairs having been made earlier this summer and Big Bertha finally picked back together underground, Washington State Department of Transportation and Seattle Tunnel Partners crews are hopeful that their 18-month nightmare is nearing a close. Now two years behind schedule, the world’s largest tunnel-boring machine is pegged for a return to digging in […]
September 29, 2015
Roadbuilding
Stronger Big Bertha cutter head lowered back into its pit for tunneling
Big Bertha’s massive cutter head is back underground after months of repairs were made to get the world’s largest tunnel-boring machine back to work. According to the Seattle Times, Big Bertha’s new, stronger front end took the 120-foot dive into the pit Tuesday as Dutch lifting company Mammoet lowered the 2,000-ton machine back down. In […]
August 27, 2015
Roadbuilding
Big Bertha is set to start drilling again in November after extensive repairs, testing
The world’s largest tunnel-boring machine is now scheduled to get back to work on November 23, nearly two years after it overheated and stalled while digging beneath Seattle. The Seattle Times reported that the construction team handling the massive undertaking of drilling the 1.8-mile Highway 99 tunnel released the new timetable and a new completion date of […]
July 21, 2015
Roadbuilding
Crews begin installation of Big Bertha’s new seal system
While the rest of her massive frame waits below ground, Big Bertha has undergone the most pivotal portion of her badly-needed brain surgery. According to a report from the Puget Sound Business Journal, repair crews with Seattle Tunnel Partners, the lead contractor on the drilling of a new State Route 99 tunnel beneath Seattle, have begun […]
June 16, 2015
Roadbuilding
Damage to Big Bertha worse than previously thought
Now that crews are well into the process of dismantling her front-end for necessary repairs, it’s clear that damage to Big Bertha, the world’s largest tunnel-boring machine, is worse than previously thought. Making matters worse, the tunneler likely won’t resume its work drilling the State Route 99 tunnel beneath Seattle by August as the project’s […]
May 26, 2015
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
Roadbuilding
Did Seattle’s SR 99 tunnel really require Big Bertha? Indeco argues breakers are the answer
Tunnel boring machines such as Big Bertha, the 7,000-ton machine sidelined after a massive fail under the streets of Seattle, shouldn’t always be considered the most efficient option for creating big dig projects, says a new publication produced by Italian hammer manufacturer Indeco and released at the Intermat construction equipment trade show this week. […]
April 23, 2015
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
Roadbuilding
PHOTOS: Big Bertha’s 2,000-ton front end lifted to the surface. How the world’s largest tunneler was raised
[imagebrowser id=225] After a year of slumber and almost a month after chewing her way into a 12-story repair pit, Big Bertha, the world’s largest tunnel-boring machine, is finally under repair in Seattle. Crews worked for the better part of March to disassemble the machine’s front end before lifting the machine’s cutterhead and body shield panels—a […]
April 1, 2015
Roadbuilding
Big Bertha breaks through: tunnel-boring machine enters repair pit, ready for disassembly
Though she remains very far from being done, Big Bertha completed a very important leg in her journey beneath Seattle last week, breaking through a thick wall of concrete and into a 12-story pit. According to a report from the Associated Press, the world’s largest tunnel-boring machine moved 57 feet since February 17 to enter […]
March 9, 2015
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