Quality Assessment of Geogrids Used for Subgrade treatment
Geogrid reinforcements have been used by the Indiana Department of Transportation (INDOT) to construct stable subgrade foundations and to provide a working platform for construction over weak and soft soils. The use of geogrid extends pavement life expectancy by reducing deformation and cracking and is a faster and more effective solution than chemical treatment. In addition, geogrids provide reinforcement by laterally restraining the subbase, thereby improving the bearing capacity of the pavement system and decreasing the shear stresses on the subgrade soil.
As a result of the project, INDOT has implemented new specifications of appropriate aperture area and junction strength requirements for supgrade soil-geogrid-aggregate systems based on the recommendations provided in the final report.
Lee, M., Choi, Y. and Prezzi, M. (2012). "Quality Assessment of Geogrids Used for Subgrade Treatment-Phase II." Publication FHWA/IN/JTRP-2012/27. Joint Transportation Research Program, Indiana Department of Transportation and Purdue University, West Lafayette, Indiana, 2012. DOI: 10.5703/1288284315034.