Girder bridges
Girder bridges are the simplest bridge type in structure and consist of steel beams shaped to an I-section or box section, called a plate girder bridge or a box girder bridge, respectively. Girder bridges are comprised of deck slabs, on which vehicles and people pass, and of main girders supporting the deck slabs. Deck slabs include RC deck slabs, steel deck slabs, composite deck slabs, and PC deck slabs. Bridges where the deck slabs and the main girders work together to resist loads are called composite girder bridges, and bridges designed to resist loads with the main girders only are called non-composite girder bridges. In general, effective spans of about 25 to 150 meters are applied, but the Costa e Silva Bridge (Brazil) was built with the longest effective span of 300 meters. JFE Engineering has the most experience in the manufacture and construction of bridges of this type.
Construction examples
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Name
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New Takatsuno Bridge
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Year completed
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2021
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Bridge type
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3-span box girder
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Client
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Shimane Prefecture
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Bridge length
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246m
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Features
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The bridge was erected from the riverbed on the right bank using the launching erection method, and the remaining girders were erected from both banks using the truck crane venting method.
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Name
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Nagoya West Junction
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Year completed
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2021
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Bridge type
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8-span continuous steel slab box girder, 3-span continuous non-composite box girder (precast PC slab)
5-span continuous non-composite plate girder (composite slab), etc.
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Client
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West Nippon Expressway Company Limited, Nagoya Sales Office
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Bridge length
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1945.5 m (total bridge length of construction section)
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Features
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Due to the construction limit with the adjacent road, the girder height was reduced to the limit, which lower rigidity of girders. As a result,the bridge was erected with a large amount of deflection.
In order to minimize social impacts such as traffic restrictions, a batch erection using multi-axle bogies and large cranes was mainly adopted.
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Name
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New Ooigawa Bridge
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Year completed
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2021
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Bridge type
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5-span continuous non-composite box-girder bridge
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Client
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Ministry of Land, Infrastructure and Transport Chubu Regional Development Bureau
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Bridge length
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318.4m
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Features
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Composite slab panels were erected by two parties on each side to shorten the construction schedule. As the result of the effort, the erection was completed by the end of May during the non-water season.
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Name
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Expressway Yokohama Loop Northwest Route, Aoba Area, Upper Section and Piers (Part 1)
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Year completed
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2020
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Bridge type
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3 continuous RC slab box girders, continuous steel slab box girders, continuous composite slab box girders, 11 steel piers
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Client
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Metropolitan Expressway
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Bridge length
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950m (total bridge length of construction section)
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Features
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The truck crane venting method and multi-axle bogies were used to erect the bridge in batches under traffic restrictions on the motorway adjacent to and directly below the bridge.
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Name
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Haruta 3 viaduct
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Year completed
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2020
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Bridge type
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3-span continuous non-composite box-girder bridge
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Client
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Chubu Regional Development Bureau, Ministry of Land, Infrastructure and Transport
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Bridge length
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191ｍ
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Features
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Night-time road closure restrictions were implemented at the adjacent prefectural road intersection. The bridge was erected using the truck crane venting method.
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Name
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Akasaka North No. 1 Viaduct
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Year completed
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2019
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Bridge type
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5-span continuous non-composite box-girder bridge
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Client
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Chubu Regional Development Bureau, Ministry of Land, Infrastructure and Transport
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Bridge length
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370ｍ
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Features
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Two of the five bore spans were erected using the launching erection method and the rest of three using the truck crane venting method.
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Name
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Kurashiki Minato Bridge
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Year completed
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2016
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Bridge type
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Bridge type 7-span continuous box girder and two other girders
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Client
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Ministry of Land, Infrastructure and Transport Chugoku Regional Development Bureau
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Bridge length
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384m
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Features
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Al + Mg metal spray coating with long-term anti-corrosion performance was applied to the outer surface. In addition, anti-corrosion bolts were used for the on-site joints.
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Name
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Kannonji Viaduct
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Year completed
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2011
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Bridge type
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(Bridge No. 5) 3-span continuous open-section box girder
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Client
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Ministry of Land, Infrastructure, Transport and Tourism Kinki Regional Development Bureau
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Bridge length
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Bridge No. 3: 118m, Bridge No. 5: 196m, Bridge No. 8: 219m
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Features
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Steel-concrete composite deck slabs used
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Name
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Iwo Jima Bridge
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Year completed
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2011
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Bridge type
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3-span continuous steel deck curved box girder
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Client
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Nagasaki Prefecture
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Bridge length
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480ｍ
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Features
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Marine single-operation erection of large block by floating crane
(Maximum block length: 163 m)
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Name
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Kizugawa Bridge
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Year completed
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2007
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Bridge type
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6-span continuous composite open-section box girder
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Client
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Ministry of Land, Infrastructure, Transport and Tourism Kinki Regional Development Bureau
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Bridge length
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439m
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Features
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-
Open-section box girder bridge
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U-rib composite deck slab
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Weather-resistant bridge (CUPTEN COAT M)
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