COMPANY NEWS Keeping Seattle safe on Alaskan Way TBM drive Feb 2012
SolData News Release
SolData is selected to monitor ground movement and structures during the record-breaking 17.6m diameter (58ft) x 1.7 mile (2.7km) Alaskan Way viaduct replacement TBM tunnel drive in Seattle.

SolData will monitor ground movement along the construction corridor

The Pennsylvania based company will begin a construction monitoring program in Spring this year, in advance of tunneling starting next year (2013). The technically challenging drive under Seattle's high-rise city centre is to be completed by the world's largest diameter 17.6m (58ft) EPBM, which is being manufactured at present at the Hitachi Zosen factory in Japan.
SolData was selected by Seattle Tunnel Partners (STP) from numerous proposers to install, read and manage instrumentation related to the construction of the Washington State Department of Transportation's (WSDOT) SR 99 Tunnel project.
A state-of-the-art instrumentation program will carry out the vitally important task of monitoring ground movements and structures above and near the tunnel. Similar monitoring programs have been used by the company on other urban projects including Amsterdam's North-South Line in Holland, Barcelona's Subway L9 in Spain, and Budapest's M4 subway in Hungary.

17.6m EPBM will advance beneath Seattle's high-rise city center

More than 1,000 different types of instruments will be installed above and below ground surface before tunneling begins in Seattle. SolData plans to install more than 40 CYCLOPS (Automated Monitoring Stations) to monitor the 3D movement of buildings, structures, ground surface and rail lines during construction. The system will allow STP and WSDOT to monitor all data in real time. All automated and manually collected data will be managed with a SolData proprietary package called Geoscope.
The construction monitoring program is set to start in the Spring of 2012 and continue until tunneling is completed in 2015.
Spanish tunneling contractor Dragados and JV partner Tutor-Perini of California signed a $1.4 billion contract to design and build the two decked tunnel in January 2011.
Alaskan Way bored tunnel alignment – video report - TunnelCast, October 2010
Alaskan Way contract signed - TunnelTalk, January 2011
Japanese machine for Alaskan Way mega drive - TunnelTalk, July 2011

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