Determination of subgrade modulus and stiffness of pavement layers for measurement of bearing capacity under fast moving wheel load
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United States of America Patent
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Nov 18, 2014
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N/A
app pub date -
Oct 18, 2010
filing date -
Oct 16, 2009
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Abstract
The present invention directed to rolling weight deflectometers having sensors to measure pavement deflection, and to provide test data to determine the subgrade modulus and equivalent thickness of pavements. This information is then utilized to determine more than deflection and according to the present invention is utilized to determine critical strain parameters that can be applied to predict bearing capacity, rutting and roughness characteristics of pavements. This invention enhances the value of pavement testing while at the same time allowing for testing systems having fast moving wheel loads. The collected data can be used to determine vertical compressive strain and horizontal tensile strain, which can be more valuable for the prediction of remaining life time and recommendations for repair and maintenance.
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