Prefabricated Bridge Elements and Systems Innovative Projects
By Elements and Systems: Substructure
Dallas/Fort Worth International Airport People Mover | |
|---|---|
| Location | Dallas/Fort Worth Metroplex |
| State | TX |
| Completion Date | 2004 |
| Contact Person | Katherine Berkenbile P.E. STOA/Carlos + Law, AE Phone: (850) 432-1912 Email: kberkenbile@gcae.com |
| Description | DFW Airport decided to upgrade its Airport People Mover System in order to accommodate new terminals and increased passenger count. The new People Mover will transport people from the farthest terminals in 11 minutes transport time. The cost per day of casting conventional concrete columns with forms and guy wires for the reinforcing is high due to space that would be used on the airport apron. Instead of closing aircraft terminals and gates, the DFW Airport People Mover Team decided to design and build a precast post-tensioned segmental system of columns. |
| Photo |  |
| Prefabricated Elements | substructure |
| Other Keywords | Precast post-tensioned segmental columns |
| Advantages | Allowed the airport apron to remain clear of guy wires. Allowed column construction to happen at night with minimal disruption of airport traffic, Minimized traffic disruption, Improved constructibility. |
| Photo Credits | STOA/Carlos + Law, AE |
SH 249/Louetta Road Overpass | |
| Location | Houston |
| State | TX |
| Completion Date | 1994 |
| Contact Person | Mary Lou Ralls P.E. State Bridge Engineer Bridge Division Texas Department of Transportation 125 E. 11th Street Austin TX 78701-2483 Phone: (512) 416-2183 Fax: (512) 416-3144 Email: mralls@dot.state.tx.us |
| Description | In the early 1990's Texas State Highway 249 was upgraded from a four-lane, at-grade road to a limited-access freeway. Consequently, two overpass structures were built at Louetta Road to carry three lanes in each direction, plus shoulders and ramp transitions. The superstructure consists of simple-span pretensioned trapezoidal-shaped 54-inch U-beams as well as precast pretensioned deck panels supported on the U-beams' top flanges with a cast-in-place composite concrete topping. The bridges are three spans each, nominally 130 ft. per span. At the interior bents, each beam is supported by a single post-tensioned pier. All beams and piers were designed and fabricated using high-performance/high-strength concrete. |
| Photo |  |
| Prefabricated Elements | partial, substructure |
| Other Keywords | Precast pretensioned partial-depth deck panels, precast post-tensioned piers, pretensioned U-beams,precast prestressed U-beams |
| Advantages | Minimized traffic disruption |
| Photo Credits | Texas Department of Transportation |
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