First GRS-IBS bridge for D.C.

The Washington, D.C., Department of Transportation (DDOT) is using the geosynthetic reinforced soil–integrated bridge system (GRS–IBS) technology for the first time.

The GRS–IBS uses alternating layers of compacted granular fill and sheets of geotextile or geogrid reinforcement to provide bridge support. Not only is GRS–IBS quick and easy to build with common equipment and materials, it is 25–60% more cost-effective than conventional construction.

The project to replace the 27th Street Bridge in northwest D.C. received a grant from the Federal Highway Administration’s Highways for Life program that encourages the use of innovative products and applications.

The DDOT is planning a summer showcase of this project-in-progress to demonstrate the use of GRS–IBS to transportation professionals. Construction of the 27th Street Bridge is expected to take about 70 days, with completion scheduled for September 2015.

Source: FHWA’s Innovator Newsletter (July/August 2015)