Accelerated Bridge Construction

The GRS-IBS is a generic, economical geotechnical solution for Accelerated Bridge Construction (ABC), saving between 25-60% in project cost, and results in improved performance by alleviating the bump at the end of the bridge. With closely-spaced, compacted layers of granular fill materials reinforced by geosynthetics, GRS exhibits high bearing and seismic resistance with predictable deformation and minimal serviceability issues, making it an ideal technology for single span bridge support. The technology also eliminates the need for traditional joints, bearings, and approach slabs, resulting in less material and labor costs.  

This workshop will start by covering some background on the technology including showing some example projects that have been constructed around the country.  The presentation will then cover the design of a GRS IBS structure including some of the background research that has been conducted to develop the design procedures.  The presentation will conclude with how a GRS IBS project is constructed. Additionally, the workshop will include an overview on site selection and material specifications.  For more information on this program prior to the workshop, please visit:


Mr. Daniel Alzamora is a Senior Geotechnical Engineer in the Resource Center of the Federal Highway Administration in Lakewood, Colorado. He has over 25 years of professional Geotechnical Engineering experience, both in the private sector and for the past 15 years with the Federal Highway Administration.   

He received his Bachelor’s Degree in Civil Engineering (BSCE) from the University of Connecticut and a Master's Degree in Civil Engineering (MSCE) from the University of Colorado. He is a registered Professional Engineer in the State of Georgia. Mr. Alzamora also serves on numerous technical committees and working groups, including the Transportation Earthworks (AFS10) and Geosynthetics (AFS70) Committees at the Transportation Research Board.            

GRS IBS-Workshop 04-04-2017.pdf GRS IBS-Workshop 04-04-2017.pdf
FEREIRA CRACK-Less_Bridge_Decks_Feb 7 2017- APWA.pdf FEREIRA CRACK-Less_Bridge_Decks_Feb 7 2017- APWA.pdf

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