Validation of Deflection Bowl Parameter Method for Pavement Structural Evaluation in the Network Scale
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
Deflection bowl parameter (DBP) offers an effective method to evaluate pavement structural strength based merely on deflection data collected from falling weight deflectometer (FWD) equipment. A new set of DBP thresholds was established using selected Singapore road network data, which is being validated in this study for practical implementation. From FWD data and DBP results, six coring locations were proposed to collect pavement layer thicknesses and sub-structural strength conditions. Back-calculation of layer moduli was conducted to cross-reference with DBP results. There is strong agreement between DBP results and back-calculated moduli of pavement layers across all parameters. In total, 22 out of 24 back-calculated moduli were validated by cross-reference with DBP results (or 91.7%). Therefore, using DBP method or back-calculated moduli is observed to be adequate, and the established DBP method is demonstrated to provide a quick and non-destructive check on pavement structural health at the network level.
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Published In
International Conference on Road and Airfield Pavement Technology 2023
Pages: 71 - 79
History
Published online: Feb 6, 2024
ASCE Technical Topics:
- Analysis (by type)
- Data collection
- Engineering fundamentals
- Failure analysis
- Gravels
- Infrastructure
- Mathematics
- Methodology (by type)
- Parameters (statistics)
- Pavement condition
- Pavement deflection
- Pavements
- Research methods (by type)
- Statistics
- Structural behavior
- Structural deflection
- Structural engineering
- Structural strength
- Transportation engineering
- Validation
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