United States Department of Transportation
i
Structural health monitoring of I-10 twin span bridge : [tech summary].
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2014-11-01
[PDF-116.70 KB]
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Abstract:A new I-10 Twin Span Bridge was built over Lake Pontchartrain between New Orleans and Slidell, Louisiana to replace the old bridge
that was seriously damaged from the storm surge associated with Hurricane Katrina (Category 3) that hit the southern part of
Louisiana in August 2005. It was designed with higher capability to withstand extreme events such as hurricane storm surges and
ship impacts. The new bridge is around 5.4-miles long located 300 ft. to the east of the old bridge with an elevation of 30 ft., 21 ft.
higher than the old bridge, and an 80-ft. high-rise section near the Slidell side to allow for marine traffi c, making it less susceptible to
high storm surge. The bridge consists of two parallel structures with three 12-ft. travel lanes and two 12-ft. shoulders on each side (60
ft. wide), allowing for a 50 percent increase in the traffi c volume. Some piers of the new bridge are supported by precast pre-stressed
concrete (PPC) batter pile group foundations.
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