Emad Iskander, Ph.D., PE performed the design review of slurry wall shafts, Sequential Excavation Method (SEM) adits connecting to the tunnel, and support of excavation for near-surface structures. The century-old combined sewer system in the District of Columbia was...
Project Experience
NATM/SEM Tunnels
Design of the Plane Train Tunnel West Extension
The Plane Train tunnel project included developing of a 700-foot-long tunnel extension to the existing Plane Train automated people mover (APM) beyond the airport’s domestic baggage claim terminus station. This extension created a more efficient train turn-around...
Ottawa Light Rail Transit
Ottawa Light Rail Transit is a 2.4-km-long two-track running tunnel and Rideau underground station. The tunnel is 10 m wide between spring lines with its crown between 12 and 26 m below ground surface. The tunnel was driven in the local Verulam and Lindsay sedimentary...