FHWA NDE CENTER RESEARCH & DEVELOPMENT
GRS Abutments
A test bridge using geosynthetic reinforced soil (GRS) abutments has been constructed at the TFHRC. This structure was built jointly by the FHWA NDE Center and the Geotechnical Team at the TFHRC and will serve as a test platform for geotechnical research as well as for various NDE techniques.
Figure 1: The GRS Abutment structure
The FHWA NDE Center laser system was used to perform initial measurements on the GRS abutments. These measurements provided
a baseline set of data on the original position and shape of the abutment walls. Permanent reference targets have been installed
on the walls of the abutments so that precise points on the structure can be tracked over time. Also, a detailed scan was made of the bare
rough-cut concrete surface.
The laser scanner was placed in five different locations in order to measure six faces of the abutments. Data were collected
over a volume of about 160 ft by 40 ft by 15 ft, providing a detailed scan of the test specimen.
Figure 2: The Laser System in use during abutment testing
Below: Data on the abutment structures generated
by the FHWA NDE Center Laser System
Other applications of the FHWA NDE Center Laser System:
Bridge Load Testing
Steel Bridge Fabrication
FHWA Curved Girder Bridge Study
For more information, please contact either by e-mail or telephone.
Frank Jalinoos (202) 493-3082
frank.jalinoos@fhwa.dot.gov
