Study on wavelet entropy for airport pavement inspection using a multi-static GPR system

Zou, Lilong ORCID:, Kikuta, Kazutaka, Alani, Amir and Sato, Motoyuki (2021) Study on wavelet entropy for airport pavement inspection using a multi-static GPR system. Geophysics. ISSN 0016-8033 (In Press)

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The multi-layer nature of airport pavement structures is susceptible to the generation of voids at the bonding parts of the structure, which is also called interlayer debonding. Observations have shown that the thickness of the resulting voids is usually at the scale of millimeters, which makes it difficult to inspect. The efficient and accurate characteristics of ground penetrating radar (GPR) make it suitable for large area inspections of airport pavement. In this study, a multi-static GPR system was used to inspect the interlayer debonding of a large area of an airport pavement. A special antenna arrangement can obtain common mid-point (CMP) gathers during a common offset survey. The presence of interlayer debonding affects the phase of the reflection signals, and the phase disturbance can be quantified by wavelet transform. Therefore, an advanced approach that uses the average entropy of the wavelet transform parameters in CMP gathers to detect the interlayer debonding of airport pavement is proposed. The results demonstrate that the regions with high entropy correspond to the regions where tiny voids exist. The new approach introduced in this study was then evaluated by a field-base experiment at an airport taxiway model. The results show that the proposed approach can detect interlayer debonding of the pavement model accurately and efficiently. The on-site coring results confirm the performance of the proposed approach.

Item Type: Article
Identifier: 10.1190/geo2020-0361.1
Additional Information: © 2021 Society of Exploration Geophysicists. This is the peer reviewed version of the following article: [Lilong Zou, Kazutaka Kikuta, Amir M. Alani, and Motoyuki Sato, (), "Study on Wavelet Entropy for Airport Pavement Inspection using a Multi-Static GPR System," GEOPHYSICS 0: 1-74.], which has been published in final form at: This article may be used for non-commercial purposes in accordance with SEG terms of use and conditions.
Keywords: Common midpoint (CMP), engineering, ground-penetrating radar (GPR)
Subjects: Construction and engineering > Civil and environmental engineering
Construction and engineering > Electrical and electronic engineering
Construction and engineering > Civil and structural engineering
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Depositing User: Lilong Zou
Date Deposited: 16 Feb 2021 13:10
Last Modified: 06 Feb 2024 16:05


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