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2015FallShotcreteEMag

Goin’ Underground of this liner, we used several methods to assist us in encapsulating all of the reinforcement. We placed the shotcrete with unique techniques developed by our team specifically for this appli- cation (refer to Fig. 7 and 8). All in all, Superior shot 1463 yd3 (1118 m3) and finished the tunnel with two shifts to spare. From the complexity of the tunnel reinforcement system, the large thickness, and the overhead application, the coordinated teamwork from Schiavone/Kiewit JV and Superior Gunite’s team made this a huge success. The freezing operation was turned off early and the load from the six-lane thoroughfare on top, with an overhead train line running 500 trains per day, continued. This was the first part of a much bigger project to bring the Fig. 7: Nozzle in outer layer of reinforcement, encasing the back layer Long Island Railroad into a new terminal beneath Grand Central Station in Manhattan (refer to Fig. 9(a) and (b)). Frank E. Townsend III is the East Coast Region Manager for Superior Gunite. He is a civil engineering graduate of Wor - cester Polytechnic Institute, Worcester, MA, and received his master’s degree from the Uni- versity of Missouri, Columbia, MO. Townsend comes from the U.S. Army Corps Fig. 8: Cutting of guides and finishing of Engineers and has been running Superior’s East Coast operations (predominantly New York, (a) New Jersey, Connecticut, and Boston, MA) for 3 years now. Townsend is an active member of ASA and currently serves on the ASA Board of Directors. Protective Arch Liner Project Name Northern Boulevard Crossing Tunnel CQ039 (b) Project Location Queens, NY Shotcrete Contractor Superior Gunite General Contractor Schiavone/Kiewit JV Architect/Engineer New York Metropolitan Transportation Authority Capital Construction Material Supplier/Manufacturer Ferrara Brothers Building Material Fig. 9: Finished tunnel looking east to west 5000 PSI Mix under Northern Boulevard 54 Shotcrete • Fall 2015


2015FallShotcreteEMag
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