An impact echo method to detect cavities between railway track slabs and soil foundation

Abstract The impact echo technique is one of the most useful non-destructive test methods for determining the thickness of concrete or detecting possible cracks or cavities in the internal parts of a concrete structure without damaging the surface. Many types of unstable conditions in railway tracks...

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Autores principales:	Pierre Anthyme Bahati, Viet Dinh Le, Yujin Lim
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Concrete slab track Impact echo Finite element analysis STFT Wavelet Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/fe1f0087660e44f181ba438037fa4117
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spelling	oai:doaj.org-article:fe1f0087660e44f181ba438037fa41172021-11-14T12:16:24ZAn impact echo method to detect cavities between railway track slabs and soil foundation10.1186/s44147-021-00008-w1110-19032536-9512https://doaj.org/article/fe1f0087660e44f181ba438037fa41172021-09-01T00:00:00Zhttps://doi.org/10.1186/s44147-021-00008-whttps://doaj.org/toc/1110-1903https://doaj.org/toc/2536-9512Abstract The impact echo technique is one of the most useful non-destructive test methods for determining the thickness of concrete or detecting possible cracks or cavities in the internal parts of a concrete structure without damaging the surface. Many types of unstable conditions in railway tracks, including various modes of irregularities, may occur when cavities are generated directly under a concrete slab track or when a slight open space is made under a loose sleeper. In this study, we developed a nondestructive testing (NDT) system for detecting abnormalities in concrete tracks and performed 3D numerical simulations using the ABAQUS finite element analysis (FEA) program to investigate the impact echo response from a concrete track slab with different sizes of cavities. Sections of concrete slab were simulated as solid body masses under the railway tracks with gaps in the bodies themselves or with cavities existing between the track concrete layer (TCL) and the hydraulically stabilized base (HSB). We investigated the locations and depths of the cavities and gaps in the model concrete slab using the acoustic impact echo response based on the frequency response of the elastic waves generated in the slab. In addition, a Short-time Fourier Transform (STFT) and a wavelet technique were adopted for a time frequency analysis. Our study demonstrated that the impact echo technique developed in this study by FEA and NDT can measure and confirm the location and depth of cavities in concrete slabs.Pierre Anthyme BahatiViet Dinh LeYujin LimSpringerOpenarticleConcrete slab trackImpact echoFinite element analysisSTFTWaveletEngineering (General). Civil engineering (General)TA1-2040ENJournal of Engineering and Applied Science, Vol 68, Iss 1, Pp 1-28 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Concrete slab track Impact echo Finite element analysis STFT Wavelet Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Concrete slab track Impact echo Finite element analysis STFT Wavelet Engineering (General). Civil engineering (General) TA1-2040 Pierre Anthyme Bahati Viet Dinh Le Yujin Lim An impact echo method to detect cavities between railway track slabs and soil foundation
description	Abstract The impact echo technique is one of the most useful non-destructive test methods for determining the thickness of concrete or detecting possible cracks or cavities in the internal parts of a concrete structure without damaging the surface. Many types of unstable conditions in railway tracks, including various modes of irregularities, may occur when cavities are generated directly under a concrete slab track or when a slight open space is made under a loose sleeper. In this study, we developed a nondestructive testing (NDT) system for detecting abnormalities in concrete tracks and performed 3D numerical simulations using the ABAQUS finite element analysis (FEA) program to investigate the impact echo response from a concrete track slab with different sizes of cavities. Sections of concrete slab were simulated as solid body masses under the railway tracks with gaps in the bodies themselves or with cavities existing between the track concrete layer (TCL) and the hydraulically stabilized base (HSB). We investigated the locations and depths of the cavities and gaps in the model concrete slab using the acoustic impact echo response based on the frequency response of the elastic waves generated in the slab. In addition, a Short-time Fourier Transform (STFT) and a wavelet technique were adopted for a time frequency analysis. Our study demonstrated that the impact echo technique developed in this study by FEA and NDT can measure and confirm the location and depth of cavities in concrete slabs.
format	article
author	Pierre Anthyme Bahati Viet Dinh Le Yujin Lim
author_facet	Pierre Anthyme Bahati Viet Dinh Le Yujin Lim
author_sort	Pierre Anthyme Bahati
title	An impact echo method to detect cavities between railway track slabs and soil foundation
title_short	An impact echo method to detect cavities between railway track slabs and soil foundation
title_full	An impact echo method to detect cavities between railway track slabs and soil foundation
title_fullStr	An impact echo method to detect cavities between railway track slabs and soil foundation
title_full_unstemmed	An impact echo method to detect cavities between railway track slabs and soil foundation
title_sort	impact echo method to detect cavities between railway track slabs and soil foundation
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/fe1f0087660e44f181ba438037fa4117
work_keys_str_mv	AT pierreanthymebahati animpactechomethodtodetectcavitiesbetweenrailwaytrackslabsandsoilfoundation AT vietdinhle animpactechomethodtodetectcavitiesbetweenrailwaytrackslabsandsoilfoundation AT yujinlim animpactechomethodtodetectcavitiesbetweenrailwaytrackslabsandsoilfoundation AT pierreanthymebahati impactechomethodtodetectcavitiesbetweenrailwaytrackslabsandsoilfoundation AT vietdinhle impactechomethodtodetectcavitiesbetweenrailwaytrackslabsandsoilfoundation AT yujinlim impactechomethodtodetectcavitiesbetweenrailwaytrackslabsandsoilfoundation
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An impact echo method to detect cavities between railway track slabs and soil foundation

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