Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response
| Autor: | Pierre Hornych, Natasha Bahrani, Juliette Blanc, Fabien Menant |
|---|---|
| Přispěvatelé: | Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (MAST-LAMES ), Université Gustave Eiffel |
| Jazyk: | angličtina |
| Předmět: |
CHAUSSEE (CORPS DE)
pavement displacement CHAUSSEE accelerometers 0211 other engineering and technologies Full scale 020101 civil engineering 02 engineering and technology Impulse (physics) ACCELERATION Accelerometer GEOPHONE lcsh:Technology 0201 civil engineering ACCELEROMETER Deflection (engineering) EVALUATION 021105 building & construction 11. Sustainability SURVEILLANCE General Materials Science ACCELEROMETRE INSTRUMENTATION CAPTEUR Civil and Structural Engineering geophones Signal processing pavement instrumentation business.industry lcsh:T Geophone Building and Construction Structural engineering SISMIQUE SURVEILLANCE DE SANTE STRUCTURALE Geotechnical Engineering and Engineering Geology condition assessments Computer Science Applications Falling weight deflectometer Axle [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Environmental science business pavement monitoring CONTROLE |
| Zdroj: | Infrastructures Volume 5 Issue 3 Infrastructures, 2020, 5 (3), 22 p. ⟨10.3390/infrastructures5030025⟩ Infrastructures, Vol 5, Iss 3, p 25 (2020) |
| ISSN: | 2412-3811 1945-7553 |
| DOI: | 10.3390/infrastructures5030025 |
| Popis: | Pavement instrumentation with embeddable in-situ sensors has been a feasible approach to determine pavement deteriorations. Determining pavement deflections during the passage of the load is a promising strategy to determine the overall performance of the pavement. There are different devices that apply loads to the pavements and measure the deflection basin, these include static, vibratory or impulse loadings. Most commonly used are the static loading like Benkelman beam and impulse loading like the Falling Weight Deflectometer (FWD). However, these techniques are costly and the measurements are recorded infrequently i.e. once per year or two years. This study focuses on the use of geophones and accelerometers to measure the surface deflections under traffic loading. To develop a method to measure pavement deflections, the sensors have been submitted first to laboratory tests, and then tested in situ, in a full scale accelerated pavement test. In the laboratory, the sensors have been submitted to different types of loading using a vibrating table. These tests were used to determine the noise and sensitivity of the sensors, and then to evaluate their response to signals simulating pavement deflections under heavy vehicles. The sensor response has been compared with measurements of a reference displacement sensor. Different processing techniques have been proposed to correct the measurements from geophones and accelerometers, in order to obtain reliable deflection values. Then, the sensors have been evaluated in a full scale accelerated test, under real heavy axle loads. Tests have been performed at different loads and speeds, and the deflection measurements have been compared with a reference anchored deflection sensor. The main advantage of using accelerometers or geophones embedded in the pavement is to enable continuous pavement monitoring, under real traffic. The sensor measurements could also be used to determine the type of vehicles and their corresponding speeds. The study describes in detail the signal analysis needed to measure the pavement deflections accurately. The measurements of pavement deflection can be then used to analyze the pavement behaviour in the field, and its evolution with time, and to back calculate pavement layer properties. |
| Databáze: | OpenAIRE |
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