IN-SITU EVALUATION OF PAVEMENT STRUCTURES CONTAINING DISCONTINUITIES USING DEFLECTION TECHNIQUES
Over the years, different techniques have been developed to evaluate the structural conditions of most pavement structures, but there is as yet a technique for analysing pavement structures containing discontinuities, as in utility cut patchings or trench reinstatements, drainage works, and adjoining road constructions. The method outlined in this paper utilizes deflection measurements measured using either the Falling Weight Deflectometer (FWD) or the British Deflectograph, in connection with elastic theory to estimate the elastic moduli for each layer in each section of the discontinuous pavement structure. These measurements are also quantified by the stress and strain measurements obtained from instruments installed in-situ in the pavement structure, via the use of a suite of data acquisition tools. The application of this method is illustrated by analysing deflections, stresses and strains measured on a fully instrumented test strip located on an in-service dual carriageway in Belfast, Northern Ireland. To facilitate the calibration of the analysis models, the test strip was periodically monitored using the two non-destructive devices mentioned previously.
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Corporate Authors:
Minnesota Department of Transportation
395 John Ireland Boulevard
St Paul, MN United States 55155 -
Authors:
- Pooh, P
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Conference:
- 4th International Conference, Bearing Capacity of Roads and Airfields
- Location: Minneapolis, MN
- Date: 1994-8-17 to 1994-8-21
- Publication Date: 1994
Language
- English
Media Info
- Features: Figures; References;
- Pagination: p. 139-165
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Serial:
- Volume: 1
Subject/Index Terms
- TRT Terms: Analysis; Data collection; Deflection; Deflectographs; Elasticity (Mechanics); Evaluation; Falling weight deflectometers; Field tests; Mathematical models; Measurement; Nondestructive tests; Pavement layers; Strain measurement; Stresses
- Uncontrolled Terms: Discontinuities; Models; Moduli; Pavement structure
- Old TRIS Terms: Analyzing; Elastic theory
- Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;
Filing Info
- Accession Number: 00730048
- Record Type: Publication
- Files: TRIS, STATEDOT
- Created Date: Nov 27 1997 12:00AM