On Global Equilibrium in Design of Geosynthetic Reinforced Walls
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 3
Abstract
Common design of MSE walls is based on a lateral earth pressure approach. A key aspect in design is the determination of the reactive force in each reinforcement layer so as to maintain the system in equilibrium. This force leads to the selection of reinforcement with adequate long term strength. It is also used to calculate the pullout resistive length needed to ensure the capacity of each layer to develop strength. Lateral earth pressures used in design may or may not satisfy basic global equilibrium of the reinforced soil mass. Hence, the present work establishes a benchmark test using a simple statically determinate approach, in order to check if different design procedures satisfy equilibrium. Basic statics indicate that such a test is necessary, but not sufficient, to ascertain the validity of the calculated reactive force. Three existing design methods are examined: AASHTO, National Concrete Masonry Association, and -stiffness. AASHTO, which is the simplest to apply and generally considered conservative, satisfies the benchmark test. However, it may yield very conservative results if one considers the facing to play a major role. NCMA is likely satisfactory if one explicitly accounts for the facing shear resistance in assessing the reaction in the reinforcement. The emerging -stiffness approach, which is empirical, may violate statics potentially leading to underestimation of the reinforcement force.
Get full access to this article
View all available purchase options and get full access to this article.
References
AASHTO. (1999). Standard specifications for highway bridges, 16th Ed., Washington, D.C.
AASHTO. (2007). LRFD bridge design specifications, 4th Ed., Washington, D.C.
Allen, T., and Bathurst, R. (2001a). “Application of the Ko-stiffness method to reinforced soil wall limit state design.” WA-RD 528.1, Washington State Department of Transportation, Olympia, Wash.
Allen, T., and Bathurst, R. (2001b). “Prediction of soil reinforcement loads in mechanically stabilized earth (MSE) walls.” WA-RD 522.1, Washington State Department of Transportation, Olympia, Wash.
Allen, T., and Bathurst, R. (2003). “Prediction of reinforcement loads in reinforced soil walls.” WA-RD-522.2, Revised, Washington State Department of Transportation, Olympia, Wash.
Baker, R., and Klein, Y. (2003). “An integrated limiting equilibrium approach for design of reinforced soil retaining structures: Part I—Formulation.” Geotext. Geomembr., 22(30), 119–150.
Elias, V., Christopher, B. R., and Berg, R. R. (2001). Mechanically stabilized earth walls and reinforced soil slopes—Design and construction guidelines, No. FHWA-NHI-00–043, Federal Highway Administration, Washington, D.C.
Leshchinsky, D., Ling, H. I., and Hanks, G. (1995). “Unified design approach to geosynthetic reinforced slopes and segmental walls.” Geosynthet. Int., 2(5), 845–881.
National Concrete Masonry Association (NCMA). (1997). Design manual for segmental retaining walls, 2nd Ed., J. G. Collin, ed., Herndon, Va.
Washington State Department of Transportation (WSDOT). (2006). Geotechnical design manual, M 46–03, Chap. 15, Abutments, retaining walls, and reinforced slopes, Olympia, Wash.
Information & Authors
Information
Published In
Copyright
© 2009 ASCE.
History
Received: Feb 22, 2008
Accepted: May 19, 2008
Published online: Mar 1, 2009
Published in print: Mar 2009
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.