Industry NewsTransportationTunnel Boring

Second Ave. Subway tunnel construction

New York City’s extensive transit system had not been expanded for several decades until construction of the MTA’s Second Avenue Subway program was re-started in 2007. Under Phase 1, the 72nd Street Station and Tunnels Project represents a significant portion of the extensive program. This paper describes the overall project design and unique construction challenges encountered to date for the fast-track excavation and final concrete lining of the underground works. This includes a large span station cavern, cross-over and turn-out caverns, running tunnels as well as three entrances and two ancillary shafts. All work is being performed in a densely developed urban environment, with a restricted surface work site, significant operational constraints and an aggressive construction schedule.

Related Articles

Back to top button