New passenger transport system at Dallas/Fort Worth International Airport
With about 60 million passengers each year, Dallas/Fort Worth International Airport (DFW) is one of the largest and busiest airports in the United States. It is partitioned into four semicircular terminals with 2 additional terminal buildings currently under construction. Each terminal is independent from the others with its own parking garage. This is ideal for passengers who simply park and board a plane, but it is time-consuming and difficult for those who need to transfer between the terminals. The airports interterminal train is nearly 30 years old, travels in only one direction, and is not capable of handling the airport’s extremely high number of passengers.
A better way to connect the terminals had to be found. The answer was to build an Automated People Mover (APM) system — a state-of-the-art passenger train system that can move passengers quickly from one terminal to another within the security perimeter.
DFW Airport is meeting its expansion needs by building new terminals and by moving air travelers rapidly between terminals. For this purpose, it has developed an elevated Automated People Mover (APM) system to be placed on the airside of all 6 existing or proposed terminal buildings right above the parking positions of the planes. Precast segmental columns supporting the elevated box beams were used in order to minimize jobsite disruption of continuously used gates at the 4 existing terminal buildings. The contractor was restricted to working in the area of the planes from midnight to 7:00 a.m., therefore all columns had to be cast off site in segments and moved into the assembly area during the allowable work hours.
Most of the segments were 10" high and varied in cross section from 6" x 10" rectangular for the stations and 5" x 7", and 6" x 9" ovals supporting the guideway areas. 80 station and 189 oval column ranging in height from about 30" to 50" were erected in 10" sections and one variable height section. Most sections were match cast on top of the other.
Vertical conduits were placed in the sections for the later installa- tion of the 5 to 22 - 0,6" >U
All segmental columns were cast in a yard remote from the airplane traffic at the four existing terminals and hauled to the installation location each night by a convoy of trucks.
The project used approximately 590 t of 0,6" post-tension strand and 92 t of DYWIDAG Threadbars. The bars were fabricated to length at the DSI Arlington, TX plant.