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Cooperative Innovation at the Manhattan Tunnel Project: Digger Shields with Expandable Segments to Excavate Complex Fill

In what is billed as the most urgent infrastructure project in the U.S., the Hudson Tunnel Project is a critical piece of infrastructure to build two new passenger rail tracks between New York and New Jersey and rehabilitate the century-old North River Tunnel, which was badly damaged during Superstorm Sandy. In this paper, the authors will examine the cooperative structure that allowed the generation of a singular solution for the Manhattan tunnels, and the design of the digger shield machines and segments that are unique to the complexities of this urban infrastructure project.

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