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TRANSPORT INFRASTRUCTURES * USA
* Utah - DOT Construction Method Saved Time for Travelers
UT,USA -Transportations Issues Daily, by Larry Ehl -November 7, 2011: -- Earlier this year the Utah DOT used an innovative bridge construction technique that shaved months from a typical construction project. This approach eliminated six full-freeway closures, enabling people and goods to continue moving during construction. The bridge was built in nine months using Accelerated Bridge Construction, in which the structure was constructed adjacent to its future permanent location, away from the flow of traffic... Last April engineers made history by lifting and then moving the Sam White Bridge – 3.8 million-pounds and football-field sized – across eight lanes of Interstate 15. It was the largest bridge of its kind to be moved like this in the Western Hemisphere. Despite cold temperatures, more than 1,000 spectators came to watch the move, including 200 State officials, delegates from FHWA and other DOTs, and transportation professionals from as far away as Europe... Using accelerated bridge construction techniques, workers constructed the overpass beam bridge from reinforced concrete and steel about 500 feet (152 meters) from its final destination. The bridge was then lifted 21 feet (6.4 meters) in the air, moved across eight freeway lanes, and lowered into place. Workers moved both spans simultaneously using two sets of self-propelled modular transporters — essentially hydraulic jacks on wheels.
Labels: infrastructures
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