Seattle Tunnel Partners released a new schedule this week for the repair of the damaged seals on the Bertha Tunnel Boring Machine. This revised schedule shows that the TBM won’t be digging again until March […]
Seattle Tunnel Partners and WSDOT are moving forward with the plans to excavate a 120 foot deep shaft to repair the Bertha Tunnel Boring Machine. Unfortunately, there are archaeological issues since the project team did […]
WSDOT announced on Valentine’s Day that the plan to repair the damaged Bertha TBM was not ready yet, as engineers from Hitachi Zosen, the machine’s manufacturer, would need until the end of the month to […]
Last week I attended the AEG 2013 conference in Seattle, Washington. The conference was excellent, with many great presentations and networking opportunities. I have been playing catch-up since I returned, but I have some very […]
The world’s largest Tunnel Boring Machine or TBM just arrived in Seattle last week from Japan. Hitachi Zosen Corp built the 57 foot diameter TBM and tested it before disassembling it for the journey by […]
Over 200 buildings will receive some form of geotechnical and geostructural monitoring around the Highway 99 tunnel in Seattle, better known as the tunnel that will replace the Alaskan Way Viaduct. A Seattle Times article […]
Drilled shafts have been installed by Malcolm Drilling to form the secant pile retaining walls to support the 400 ft x 80 ft x 80 ft launch pit for the SR 99 tunnel boring machine […]
Seattle’s Pier 57 will soon be home to a 175-foot tall Ferris wheel with 41 air-conditioned gondolas. The foundations for this soon-to-be-landmark consist of 150-ft long, 30-36" steel pipe piles driven through glacial till. The […]
I came across these great photos of geofoam use on the WSDOT SR 519 project which has been in service over a year now. They needed geofoam fill on the east and west bridge approaches […]
The tunnel replacing the Alaskan Way Viaduct (SR-99) will pass beneath 158 existing structures requiring an extensive program of vibration and settlement monitoring as well as some remediation. Of the 158 buildings, WSDOT identified 20 […]
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