Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response
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 a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-03-01
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| Series: | Infrastructures |
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| Online Access: | https://www.mdpi.com/2412-3811/5/3/25 |
| _version_ | 1818301240924176384 |
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| author | Natasha Bahrani Juliette Blanc Pierre Hornych Fabien Menant |
| author_facet | Natasha Bahrani Juliette Blanc Pierre Hornych Fabien Menant |
| author_sort | Natasha Bahrani |
| collection | DOAJ |
| description | 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 were submitted first to laboratory tests, and then tested in situ, in a full scale accelerated pavement test. In the laboratory, the sensors were 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 was compared with measurements of a reference displacement sensor. Different processing techniques were proposed to correct the measurements from geophones and accelerometers, in order to obtain reliable deflection values. Then, the sensors were evaluated in a full scale accelerated test, under real heavy axle loads. Tests were performed at different loads and speeds, and the deflection measurements were 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 behavior in the field, and its evolution with time, and to back-calculate pavement layer properties. |
| first_indexed | 2024-12-13T05:19:52Z |
| format | Article |
| id | doaj.art-7cb5bec513a74cf68cbbf248ba3da42c |
| institution | Directory Open Access Journal |
| issn | 2412-3811 |
| language | English |
| last_indexed | 2024-12-13T05:19:52Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Infrastructures |
| spelling | doaj.art-7cb5bec513a74cf68cbbf248ba3da42c2022-12-21T23:58:22ZengMDPI AGInfrastructures2412-38112020-03-01532510.3390/infrastructures5030025infrastructures5030025Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement ResponseNatasha Bahrani0Juliette Blanc1Pierre Hornych2Fabien Menant3IFSTTAR, Allée des Ponts et Chaussées, 44340 Bouguenais, FranceIFSTTAR, Allée des Ponts et Chaussées, 44340 Bouguenais, FranceIFSTTAR, Allée des Ponts et Chaussées, 44340 Bouguenais, FranceIFSTTAR, Allée des Ponts et Chaussées, 44340 Bouguenais, FrancePavement 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 were submitted first to laboratory tests, and then tested in situ, in a full scale accelerated pavement test. In the laboratory, the sensors were 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 was compared with measurements of a reference displacement sensor. Different processing techniques were proposed to correct the measurements from geophones and accelerometers, in order to obtain reliable deflection values. Then, the sensors were evaluated in a full scale accelerated test, under real heavy axle loads. Tests were performed at different loads and speeds, and the deflection measurements were 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 behavior in the field, and its evolution with time, and to back-calculate pavement layer properties.https://www.mdpi.com/2412-3811/5/3/25pavement monitoringaccelerometersgeophonespavement instrumentationpavement displacementcondition assessments |
| spellingShingle | Natasha Bahrani Juliette Blanc Pierre Hornych Fabien Menant Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response Infrastructures pavement monitoring accelerometers geophones pavement instrumentation pavement displacement condition assessments |
| title | Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response |
| title_full | Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response |
| title_fullStr | Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response |
| title_full_unstemmed | Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response |
| title_short | Alternate Method of Pavement Assessment Using Geophones and Accelerometers for Measuring the Pavement Response |
| title_sort | alternate method of pavement assessment using geophones and accelerometers for measuring the pavement response |
| topic | pavement monitoring accelerometers geophones pavement instrumentation pavement displacement condition assessments |
| url | https://www.mdpi.com/2412-3811/5/3/25 |
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