A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In 2005, FHWA provided guidance and abutment design plans to Defiance County to build the Bowman Road Bridge using GRS (geosynthetic-reinforced soil) technology. Defiance County realized a cost savings of nearly 25 % on this first bridge support project. The bridge was built in 6 weeks, compared to a typical construction time of several months for a conventional bridge. For the Bowman Road Bridge, instead of using cast-in-place concrete for the abutment walls, split-face cinder blocks (modular concrete blocks) were used to face the abutment. Building a GRS mass is easy: a row of blocks, a layer of compacted fill to the height of the facing blocks, and then a layer of geotextile. Each layer of geotextile is extended between the rows of blocks to connect the block to the GRS mass. The process is repeated until the designed wall height is reached. Precast concrete box beams were placed directly on the GRS abutments without a concrete footing. Asphalt pavement was placed on the bridge and approach without a conventional joint system at the bridge ends. Meanwhile, 10 other bridges have been built using the innovative technology. The performance of these bridges demonstrates that GRS technology is an efficient alternative to conventional bridge construction.
In 2005, FHWA provided guidance and abutment design plans to Defiance County to build the Bowman Road Bridge using GRS (geosynthetic-reinforced soil) technology. Defiance County realized a cost savings of nearly 25 % on this first bridge support project. The bridge was built in 6 weeks, compared to a typical construction time of several months for a conventional bridge. For the Bowman Road Bridge, instead of using cast-in-place concrete for the abutment walls, split-face cinder blocks (modular concrete blocks) were used to face the abutment. Building a GRS mass is easy: a row of blocks, a layer of compacted fill to the height of the facing blocks, and then a layer of geotextile. Each layer of geotextile is extended between the rows of blocks to connect the block to the GRS mass. The process is repeated until the designed wall height is reached. Precast concrete box beams were placed directly on the GRS abutments without a concrete footing. Asphalt pavement was placed on the bridge and approach without a conventional joint system at the bridge ends. Meanwhile, 10 other bridges have been built using the innovative technology. The performance of these bridges demonstrates that GRS technology is an efficient alternative to conventional bridge construction.
The GRS bridges of Defiance County
Brückenbau mit durch Geotextilien verstärktem Erdreich
Adams, Michael (author)
Geosynthetics ; 26 ; 14-21
2008
5 Seiten, 15 Bilder, 1 Tabelle
Article (Journal)
English
Geosynthetic Reinforced Soil Integrated Abutments at the Bowman Road Bridge in Defiance County, Ohio
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