LA TBM reaches second station25 August 2016
US – The TBM mining the rail tunnels for the Crenshaw/LAX line in Los Angeles broke through the station box for Martin Luther King, Jr. Station, the Los Angeles Country Metropolitan Transportation Authority (Metro) announced August 22.
Walsh/Shea Corridor Constructors are using a 21.5ft (6.5m) diameter Herrenknecht machine, working south under Crenshaw Boulevard on the first of 1-mile (1.6km) twin tunnels.
Three stations are underground, Expo/Crenshaw, where the TBM launched, Martin Luther King Jr. and Leimert Park. When the TBM reaches Leimert Park, Walsh/Shea Corridor Constructors will turn around to mine the northbound tunnel.
In total the USD 2.058bn project will construction an 8.5-mile (13.7km) long line. Walsh/Shea Corridor Constructors is comprised of Walsh, Shea, HNTB, Comstock and Arup.
Photo caption: TBM breakthrough on August 22 in LA, photo by Juan Ocampo for Metro