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Research and Development (R&D) Project Sites

Project Information
Project ID:   FHWA-PROJ-11-0061
Project Name:   Performance Tests for Geosynthetic Reinforced Soil (GRS)
Project Status:   Completed
Start Date:  August 15, 2011
End Date:  September 2, 2013
Contact Information
Last Name:  Nicks
First Name:  Jennifer E
Telephone:  202-493-3075
E-mail:  jennifer.nicks@dot.gov
Office:   Office of Infrastructure Research and Development
Team:   Bridge and Foundation Engineering Team [HRDI-40]
Program:   Innovative Bridge Research and Deployment
Laboratory:   Structures Laboratory
Project detail
Project Description:   A performance test is a load test on a geosynthetic reinforced soil column. A resulting stress-strain (or load-settlement) curve describes the stiffness and capacity of that composite. Different factors that affect performance (e.g. reinforcement material, reinforcement strength, reinforcement spacing, backfill type) were investigated. In addition, since the tests are loaded to failure, a LRFD calibration for bearing resistance¬†was performed.
The primary objectives of this research report are to:
(1) Build a database of Geosynthetic Reinforced Soil (GRS) material properties that can be used by designers or for Load and Resistance Factor Design (LRFD) calibration.
(2) Evaluate the relationship between reinforcement strength and spacing.
(3) Quantify the contribution of the frictionally connected facing elements at the service limit and strength limit states.
(4) Assess the new internal stability design method proposed by Adams et al. 2011a for GRS.
(5) Perform a reliability analysis of the proposed soil-geosynthetic capacity equation for LRFD.
More Information URL(s):  
  1. http://www.fhwa.dot.gov/publications/research/infrastructure/structures/13066
Product Type:   Article
Research report
Test Methodology:   Laboratory testing.
Expected Benefits:   The expected benefit is advancement of the design of geosynthetic reinforced soil walls and abutments.
Deliverables: Name: Research report and database.
Product Type(s): Research report, Data, Article
Description: A research report will be published detailing the results of the experimentation. A database will also be developed with various soil types, reinforcement materials, reinforcement strengths, and reinforcement spacing.
Publication URL(s):
Project Findings:   See FHWA-HRT-13-066 http://www.fhwa.dot.gov/publications/research/infrastructure/structures/13066
FHWA Topics:   Roads and Bridges--Design
TRT Terms:   Transportation
Planning and Design
Deformation Curve
Structural Members
FHWA Disciplines:   Design
Subject Areas:   Bridges and other structures
Transportation (General)


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