The Anacostia River Tunnel with a length of 12,300 feet (2.33 miles) and internal diameter of 23 feet will be excavated using an Earth Pressure Balance Tunnel Boring Machine (EPBM) in the hard/stiff clays and silts/sands of the Potomac Formation. This paper presents the design of the one-pass precast steel fiber reinforced segmental liner and the analysis conducted to predict surface settlement due to the tunnel excavation. The liner was designed using closed-form solutions, as well as 2D and 3D finite element analyses. The tunnel was analyzed using Plaxis 3D to simulate the excavation, the segmental liner, the annular grout pressure, EPBM earth pressure, and the thrust of EPBM jacks.
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