Screening pavement bearing capacity variance at highway speeds
A fundamental task in pavement management is to forecast road distress, such as roughness, for certain trigger values. However, the rate of pavement deterioration related to bearing capacity is often ignored at road network level, since structural testing is expensive. High deflection profile slope variance is a telltale sign of poor bearing capacity. A method for measuring this is now being tried in Sweden, utilizing discrepancies between real vs. simulated vehicle vibration. Vibration and speed of a heavy vehicle, traveling and loading, are recorded and stored for comparison with simulated data. Road roughness profiles, measured in unloaded state, are used as input for a computer simulation of the (heavy) vehicle ride. Then the vibration series are filtered to focus on ride comfort domain. Finally, the vibration series are compared. Road sections that show a large discrepancy between actual and simulated values are surmised to have poor bearing capacity. These should be given special attention by pavement engineers. Thus, this method could be used as a screening method for costlier falling weight deflectometer testing.
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Authors:
- Granlund, J
- Lenngren, C A
- Lindstroem, F
- Maartensson, B
- Conference:
- Publication Date: 2002
Language
- English
Media Info
- Pagination: 26p
- Monograph Title: Comparison of non-destructive testing devices to determine in situ properties of asphalt concrete pavement layers
Subject/Index Terms
- TRT Terms: Deterioration; Mathematical models; Pavement management systems; Rolling contact; Roughness; Traffic loads; Vibration
- Geographic Terms: Sweden
- ATRI Terms: Bearing capacity; Deterioration; Modelling; Pavement management; Roughness; Traffic load; Vehicle pavement interaction; Vibration
- Subject Areas: Freight Transportation; Pavements;
Filing Info
- Accession Number: 01443211
- Record Type: Publication
- Source Agency: ARRB
- Files: ITRD, ATRI
- Created Date: Aug 25 2012 1:10AM