INNOVATION IN BRIDgES
hunan Provincial Communications Planning, Survey & Design Institute
longyong expressway Bridge design
Longshan County, China
The $9.3 million longyong expressway in the Wuling mountains will provide
passage between china’s Hunan and Hubei provinces. The 91-kilometer main
route has 71 bridges ranging from long-span, continuous rigid-frame bridges
to small-radius, high-base bridges. challenging topography and environmental
requirements further complicated the project. A tight schedule required
construction drawings to be accepted within nine months.
Bridgemaster standardized drawing configurations, optimized blueprints, batch
processed design work, and efficiently completed complicated computational
and statistical work. Bridge information modeling facilitated design changes
and quality assurance, which helped reduce man-hours and costs by 70 percent
and freed engineers to focus on design. project design costs were reduced by an
estimated 60 percent and modifications by an estimated 80 percent.
Louisiana Department of Transportation and Development
I- 10 twin spans Bridges
Slidell and New Orleans, Louisiana, united States
The I- 10 Twin Spans cross lake pontchartrain, la., to provide one of the main
evacuation routes for new orleans. The 5.5-mile spans carry three lanes in
each direction. Goals for replacing the structures damaged by Hurricane Katrina
included storm protection, traffic safety, and barge collision resistance. The
project team deployed microStation, project Wise, Inroads, S TAAD, le Ap
conSpAn, and leAp rc-pIer.
Utilizing precast concrete elements, the project team was able to begin
construction of this $750 million project within 14 days of the hurricane and put
both spans into service within six years. Bentley software helped engineers
to share files and review submittals, produce better designs, provide clarity to
contractors, and avoid costly change orders and delays. The project is ahead of
schedule and $53 million under budget.