Reliability of the Flexible Pavement Design Model.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
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The design of flexible pavements by the US Army Corps of Engineers is currently based on the California bearing ratio CBR curve. The CBR curve is empirical, and the current design approach is deterministic. A probabilistic approach, providing more reliable designs at potentially lower costs, can be developed from the current design procedure, except that the reliability of the CBR curve is uncertain. This study was undertaken to establish the reliability of the current CBR-based flexible pavement design model, using existing data from accelerated traffic tests. The reliability of the design model was found to be 50 percent, excluding the effects of conservative estimates of the design parameters. Keywords CBR equation Flexible pavement and Pavement design.
- Civil Engineering