New Austrian Tunnelling Method for Dulles Metrorail

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Thursday, 05 Nov 2009 12:24

Working two 12-hour shifts per day, crews began tunnel construction, using the New Austrian Tunneling Method (NATM) to mine the first of two tunnels, the outbound segment.

Construction will start on the inbound tunnel in the coming months.

When completed the tunnels will be 2,400-feet (731 meters) long.

 Dulles Corridor Metrorail Tunnel Construction
During construction, crews are using sensor technology to monitor the tunnel and nearby roads for any movements. Soil in the tunnel area is a combination of gravel, clay and sand.

The construction of Dulles Corridor Metrorail is carried out in two phases.

Dulles Corridor Metrorail Route Map


Phase 1 will run from the East Falls Church Metro Station westward with four stations in Tysons Corner to the Wiehle Avenue Station at the eastern edge of Reston. Revenue service will begin in late 2013.

Phase 2, opening in 2016, has six stations – Reston Parkway, Herndon-Monroe, Route 28, Dulles Airport, Route 606 and Route 772.

To follow the construction updates of the project, please click here >>>

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