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NC Bridge Wins Innovative Award

Friday, June 28, 2019

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Deep Foundations Institute (Hawthorne, New Jersey) recently announced the winner of its 2019 DFI Outstanding Project Award (OPA): the Marc Basnight Bridge, in North Carolina, which replaces the Herbet C. Bonner Bridge, with a focus on innovative concrete piles.

The Basnight Bridge team consisted of engineering company HDR; general and foundation contractor PCL Civil Constructors; and owners North Carolina Department of Transportation.

The award is slated to be presented to the team at the DFI 44th Annual Conference on Deep Foundations Oct. 15-18, in Chicago

About the Project

The new $252 million Marc Basnight Bridge was built to replace the Herbert C. Bonner Bridge that connects the Bodie and Hatteras Islands, and is expected to have a 100-year service life.

Deep Foundations Institute

Deep Foundations Institute (Hawthorne, New Jersey) recently announced the winner of its 2019 DFI Outstanding Project Award (OPA): the Marc Basnight Bridge, in North Carolina, which replaces the Herbet C. Bonner Bridge, with a focus on innovative concrete piles.

Previously, the Bonner Bridge suffered from “severe scour and deterioration” from the Oregon Inlet’s harsh environment, which is known for being one of the most dangerous channels on the Atlantic Coast. Currently, the bridge is subject to 12 ft/s (8 mph or 13 kmh) currents, winds up to 105 mph (170 kmh) and vessel impacts up to 2,151 kips (9.6 MN).

“For many years, the potential scour design challenges have been known,” says geotechnical engineer Brian Keaney.

“However, through a lot of hard work and our understanding of the subsurface conditions, our geotechnical team pioneered innovative pile verification methods that NCDOT and the design-builder accepted to solve this unique problem.”

The 2.8-mile innovative bridge foundation design was constructed through a combination of jetting and driving to install precast, prestressed concrete piles, while the foundation itself was designed to resist scour depths as deep as 84 feet below sea level.

According to Domenic Coletti, design manager for the project: “The foundations were the key to the entire project.”

To reach maximum efficiency, the bridge was divided into five regions and consisted of three or four 54-inch diameter vertical concrete cylinder piles, transition and long navigational spans that used a combination of cast-in-place reinforced concrete pile caps with six to 30, 36-inch square concrete piles in a battered configuration to further resist wind and ship impacts.

In total, work on the project, which opened to traffic on Feb. 25, used 690 piles measuring over 15 miles in length combined.

About DFI

DFI serves as an international association of contractors, engineers, manufacturers, suppliers, academics and owners within the deep foundations industry.

The OPA was first established in 1997 and is continued to be selected by a committee where projects considered are based on size, scope and challenges of the project, innovation and integrity, and unique decisions.

DFI has more than 3,500 members worldwide and strives to promote the advancement of the deep foundation industry through technical committees, educational programs, conferences, publications, research, government relations and outreach.

   

Tagged categories: Asia Pacific; Awards and honors; Bridge Piles; Bridges; Bridges; Completed projects; Deep Foundation Institute; EMEA (Europe, Middle East and Africa); Latin America; North America; Program/Project Management; Z-Continents

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