United States Department of Transportation
i
Evaluating the Benefits of Geogrid Reinforced Bases in Flexible Pavement : Technical Summary Report
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2009-09-01
[PDF-63.54 KB]
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Content Notes:The inadequacy of many existing roads due to rapid growth in traffic volume provides a motivation
for exploring alternatives to existing methods of constructing and rehabilitating roads. The use of
geosynthetics to stabilize and reinforce paved and unpaved roadways offers one such alternative.
Many studies were conducted to evaluate the improvements associated with geogrid reinforcement of
pavements. It is widely believed that geogrid reinforcement of roadways can extend a pavement¿s
service life and/or reduce the pavement¿s structural thickness.
LTRC Technical Summary Report 450
September 2009
Several design methods were proposed for flexible pavements with geogrid reinforced base layers.
These methods were either based on empirical or analytical approaches. Empirical design methods
are usually based on obtaining a performance level from a laboratory model test, which is then
extrapolated to the field conditions for design application. The geogrid reinforced design methods
based on analytical solution do not address all the variables that affect the performance of these
pavements. This report is part of a research study on evaluating the benefits of geogrid reinforcement
of base layer in flexible pavements. It presents the findings from laboratory triaxial tests and finite
element analyses. Another report of this study will present the findings from large-scale cyclic plate
load tests on ALF sections and sections built inside a test box.
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