Thursday, December 11, 2008, 7:30 PM

 

Synopsis:
This lecture is a case study of the tunnel network and maintenance facility for an Automated People Mover (APM) system, located at Dulles International Airport (IAD) in Washington, DC. The project is for an approximate 13-mi network of tunnels that include two APM systems (domestic and international), a baggage tunnel, a tug tunnel, a utility tunnel, and an extension to the pedestrian walk-back tunnel between Tier 1 and 2.  All of the underground systems were designed to support an aircraft loading of 1.5 million lb gross weight on the operation surfaces above. The tunnels were constructed by a combination of cut-and-cover and two different tunneling methods. For mined tunnel sections, the new Austrian Tunneling Method (NATM), and Tunnel Boring Machines (TBM) were used. 

For this project Mr. Riahi led the field investigations and evaluations of ground conditions and development of comprehensive geo-technical reports consisting of a Geotechnical Reconnaissance Report (GRR), Geotechnical Data Report (GDR), Geotechnical Design Memoranda (GDM), and a Geotechnical Baseline Report (GBR). The project subsurface investigations consisted of test borings, laboratory rock testing, and in-situ field testing. The GRR presented the results of review of readily available background subsurface data relevant to the design and construction of APM tunnel system.

About the Lecturer:
Mr. Hamid M. Riahi has over 25 years of experience as a Officer-in-Charge and project manager of major underground engineering projects.  His experience includes highways and bridges, tunneling, government and private buildings, industrial facilities, pipelines, communication towers, water and wastewater treatment plants, landfills, underground and above ground storage tanks, and elevated water storage tanks. Mr. Riahi has expertise in managing detailed geotechnical investigations and final design for deep foundations in congested urban environments. Mr. Riahi holds professional registration in ten states.

Location:
Montgomery Community College (Rockville Campus)- Humanity Building (HU), Conference Room 009

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Dues: $15 per person, $5 for students (including dinner)