The repaired cutterhead has been in the pit several weeks now, and the final three pieces of shielding for the Bertha TBM have been lowered into the access pit. Seattle Tunnel Partners team members will […]
The troubled Alaska Way Viaduct Replacement Tunnel TBM known as Bertha has reached a milestone in its repair. The front cutterhead has been repaired, and has been lowered back into the access shaft to be […]
After the 2011 Fukushima earthquake, the reactors at TEPCO’s nuclear facility began leaking radioactive groundwater. The plan to contain the contamination is to use ground freezing to construct an "ice wall" to cutoff the flow. […]
Hatch Mott MacDonald received the prestigious ACEC Grand Award at the 2015 Engineering Excellence Awards Gala on April 21. ACEC had this project description in their program: More than six miles long and 43 feet […]
The Bertha TBM just received a shipment of spare parts to repair the giant tunneling machine. The manufacturer decided to redesign the seal system to make it easier to access from the inside, if necessary. […]
Fugro has completed one of the largest offshore geotechnical investigations in history according to Hydro-International.com. The investigation was performed by two vessels, MV Greatship Manisha and MV Bucentaur (pictured here), for DONG Energy’s 1.2 gigawatt […]
Advanced Construction Technology Services (ACTS) has contracts for geotechnical work for 3 lines of the proposed subway in Doha, Qatar. They have completed investigations for approximately 95 km of line and 51 stations and are […]
WSDOT reported that Bertha has slowly began moving again. It must tunnel through 20 feet of unreinforced concrete with its broken seal to break through into the rescue shaft. Once that happens, the repairs to […]
The Alaskan Way Viaduct tunneling project was in the news late last year when settlement of the Viaduct was reported during the dewatering efforts for the Bertha TBM rescue shaft. A recent post by WSDOT […]
The geotechnical software company Deep Excavation has a nice entry on their blog about the cofferdams for the Tapan Zee Bridge in New York. Geotechnical firm Siefert Associates used the DeepExcav software to design the […]
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