The Dulles Corridor Metrorail Project – Tunneling aspects of the Metrorail extension to Washington, DC Dulles International Airport Phase I and Phase II
Synopsis:
The Virginia Department of Rail and Public Transportation (DRPT) is currently undertaking the extension of Washington Metropolitan Area Transit Authority’s Metrorail service to Washington Dulles International Airport. The 37 kilometers long Metrorail alignment is scheduled for completion in 2015. The project features two single-track, 700 meter long NATM tunnels at shallow depths in soft ground. At Dulles Airport two 3.3 kilometer long, single-track tunnels will be bored by TBM in siltstone rock. A 25-meter deep station will be constructed using NATM techniques. The total cost of the Metrorail project is estimated to be approximately US $4.0 billion (2006 dollars). Upon completion of preliminary engineering in early 2007 the design build contractor, a joint venture of Bechtel and Washington Group International and referred to as Dulles Transit Partners (DTP) will submit a negotiated, firm, fixed price to DRPT and the project will be implemented under a public private partnership agreement.
The Dulles Corridor Metrorail and Its Tunneling Aspects
2007 World Tunnel Congress and 33rd ITA General Assembly
May 5-10, 2007
Prague, Czech Republic