Page 16

2017SpringShotcreteEMag

Fig. 9: Completed tunnel section The wide GCT 1/2 cavern arches were given a rod finish instead of a rubber float finish. This let the work be performed off of boom lifts rather than full-coverage scaffolding and increased the production rates. The arch was placed in three segments (left, right, and center) due to the overall size. The shotcrete process was advantageous, as the cavern arch reduced in size as the structure extended to the south. Fig. 10: Installation of GCT 1/2 arch with rod finish, working from boom lifts LOGISTICS OF STREET POURS The entirety of the project had concrete delivery from three locations, at street level in midtown Manhattan. The material was conveyed via 5 in. (125 mm) steel slick line, up to 1500 ft (450 m) in length. There was up to 8 yd3 (6 m3) in the delivery line prior to reaching the secondary concrete Gary Carlson Equipment Rental Your trusted source for wet and dry shotcrete equipment is fully stocked for both rental and sales ***National Service*** Gary Carlson Equipment Co. Rentals - Sales - Service - Delivery 1380 County Rd C West, Roseville MN 10720 Mankato St., Blaine MN Phone 763.792.9123 Allentown Shotcrete Pumps and Guns Putzmiester Shotcrete Pumps Sullivan Air Compressors and Tools Chemgrout Mixers Pumps and Plants Reed Shotcrete Systems Pumps and Guns Colidal Mixers 14 Shotcrete | Spring 2017 www.shotcrete.org


2017SpringShotcreteEMag
To see the actual publication please follow the link above