Tuesday, July 17, 2012

Bechtel completes Dulles aerial guideway

Written by  Luther S. Miller, Senior Consulting Editor

A Bechtel-led team has completed construction of a three-mile aerial guideway that is part of the 11.7 mile alignment in Phase 1 of the Dulles Corridor Metrorail Project. The guideway will carry WMATA Metrorail trains over major highways and through Tysons Corner, Va.,a busy suburban Washington business center.

"The aerial guideway has been one of the most challenging aspects of the project as we had to carry out this work safely above busy highways and in a congested area," said Larry Melton, Bechtel's executive director on the project. "Innovative construction techniques, the work of a dedicated and experienced crew, and patience from the public were critical to the successful completion of the guideway."

It was constructed by connecting more than 2,700 reinforced precast concrete segments, each weighing 25 to 40 tons. The segments were engineered for specific locations to ensure a custom fit.

Work will now focus on completion of stations and associated pedestrian bridges and pavilions, as well as on the process of connecting the Dulles extension to the existing Metrorail system.