Publication Abstract




Proceedings of the International Conference on Deep Foundations, Seepage Control and Remediation (41st Annual), 2016, New York, NY-Deep Foundations Track, (DFI)

TBM Recovery Shaft Construction- SR-99 Tunnel
John Starcevich, Lance Rasband, Richard Hanke

The 17.4 meter (57 ft) diameter tunnel boring machine (TBM), the world’s largest at the time of her launch in 2012, locally referred to as “Bertha,” is stuck. Incapacitated due to mechanical failure approximately 36 meters (120 ft) beneath downtown Seat


 article #2498; publication #1023 (AM-2016-DF)