Integration of Operations and Underground Construction: Sound Transit University Link
Abstract
Connecting an operating transit system to a new extension is always a challenge. This paper discusses the decision-making methodology and design solution of the bored tunnel connection at the Pine Street interface between the Central Link and the University Link tunnels currently being constructed for Sound Transit in Seattle, WA. The design incorporates a unique combination of ground improvement, shaft construction, and underground excavation aimed at avoiding disruption of an important arterial street and the transit operations within the Downtown Transit Tunnel. Lessons learned from Pine Street have translated into the design of the University of Washington Station, where a reception shaft for tunnel boring machines (TBMs) has been incorporated within the permanent works.
2010
North American Tunneling (NAT) Conference Proceedings
John Sleavin
Sound Transit
Peter Raleigh
Jacobs Associates
Samuel Swartz
Jacobs Associates
Phaidra Campbell
Jacobs Associates
