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Semantic Scholar extracted view of "Electromagnetic properties of railway ballast" by M. Clark et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 221,098,649 papers from all fields of science. Search. Sign In Create Free Account.
Ground penetrating radar (GPR) has been widely applied in the assessment of railway ballast conditions (fouling, moisture) by using the spectrum of the tested GPR signal. However, the drawbacks of the low time-frequency resolution and mode mixing
In the past 20 years, many studies have been performed on ballast layer inspection and condition evaluation with ground penetrating radar (GPR). GPR is a non-destructive means that can reflect the ballast layer condition (fouling, moisture) by analysing the received signal variation. Even though GPR detection/inspection for ballast layers has …
Evaluating the Properties of Railway Ballast Using Spectral Analysis of Ground Penetrating Radar Signal Based on Optimized Variational Mode Decomposition
1.1. Problems with Ballast. Although slab tracks have developed rapidly in recent decades, ballasted tracks are still the main track type for all kinds of transportation (high-speed railways, heavy-haul railways, metros, etc.) [1,2].In particular, ballasted tracks are also the main track type for general speed railways at speeds of 200–250 km/h in China [3,4].
The overall aim of this project was to relate ground penetrating radar (GPR) to a ballast fouling index (FI). Laboratory research aimed at characterising the electromagnetic properties has enabled researchers worldwide to determine ballast thickness using impulse ground penetrating radar (GPR) – based upon derived values of the relative electrical permittivity or dielectric …
My research is focused on sustainable transportation infrastructure including rail, highway, and pipeline. The target of this research is characterization of material properties and evaluation of the influence of the materials on safety, life-cycle cost, and maintenance requirements to help improve sustainability of infrastructure investments.In graduate school I focused on …
Ground penetrating radar (GPR) has been widely applied in the assessment of railway ballast conditions (fouling, moisture) by using the spectrum of the tested GPR signal.
One of the current approaches to evaluating the stiffness of railway ballast is to use a falling weight deflectometer (FWD). ... the electromagnetic properties has enabled researchers …
DOI: 10.1016/J.NDTEINT.2017.05.005 Corpus ID: 67836143; A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties @article{Ciampoli2017ASA, title={A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties}, author={Luca Bianchini Ciampoli …
Figure 12. Exponential trend lines fitting the frequency peak against the grain size data collected for the 2 single-particle (circular markers) and the mono-sized multi-particle (triangular markers) configurations. 3 - "A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties"
The overall aim of this project was to relate ground penetrating radar (GPR) to a ballast fouling index (FI). Laboratory research aimed at characterising the electromagnetic properties has enabled ...
Then, they summarized and compared processing techniques for timefrequency GPR signal that can be used to evaluate the level of railway ballast fouling. Bianchini Ciampoli et al. [10] analyzed the spectral data of GPR and assessed the geometric properties of the ballast.
DOI: 10.1016/J.NDTEINT.2017.05.005 Corpus ID: 67836143; A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties @article{Ciampoli2017ASA, title={A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties}, author={Luca Bianchini Ciampoli …
Abstract: In recent years the use of high frequency GPR antennas such as the 2GHz horn antenna have become popular for railway trackbed evaluation due to their ability to help determine the extent of fouling within the ballast layer. Fouling of the ballast affects both its strength and drainage properties. The theory is based on the scattering behaviour of GPR …
Request PDF | Electromagnetic properties of railway ballast | Laboratory experiments were undertaken to identify and characterise the dielectric properties of railway track ballast using Ground ...
Two studies of the electromagnetic properties of clean and fouled ballast (Clark et al., 2001 and Sussmann et al., 2002) clearly show an increased permittivity associated with fouled ballast. ... Niessen, J., White, G., Bell, N., 2005, "Fast Inspection of Railway Ballast by Means of Impulse GPR Equipped with Horn Antennas", Proc. Railway ...
Main electromagnetic parameters of railway ballast were estimated for each scenario using time- and frequency-domain signal processing techniques. Interpretation of the preliminary results has shown viability of the GPR method in detecting signs of decay at the network scale, thereby proving this technique to be worthy for implementation in ...
Song et al. [10] conducted cyclic shear test on ballast aggregate and determined the ratio of area of hysteresis loop to the area of triangular-shaped stress-strain curve, designated as damping ratio. The results confirmed that TDA increased the damping ratio of …
One of the current approaches to evaluating the stiffness of railway ballast is to use a falling weight deflectometer (FWD). ... the electromagnetic properties has enabled researchers worldwide to ...
The structure of a railway track typically consists of a superstructure and a substructure. The load of the track needs support. Ballast, which is part from the substructure, is the key element to support and transfer the load. Ballast typically consists of angular aggregate that is uniformly graded to provide enough structural capacity and air ...
Electromagnetic Properties of Railway Ballast. / Clark, M. R.; Gillespie, R.; Kemp, T. et al. In: NDT and E International: Independent Nondestructive Testing and ...
The mechanical behavior of railway ballast is critical to the stability and safety of railway tracks [1], [2]. Ballast, typically consisting of coarse aggregates, provides the necessary support and drainage for railway sleepers, ensuring the structural integrity of the track. However, over time, ballast can become fouled
The 10-year old University of Edinburgh full-scale trackbed was revisited and the fouling of the ballast was recalibrated following environmental changes, using the Ionescu fouling index.
Electromagnetic properties of railway ballast. In Railway Engineering-98 Proc 1st Int Conf Brunel Univ. 1998. p. 4 In Railway Engineering-98 Proc 1st Int Conf Brunel Univ. 1998. p. 4 Powered by Pure, Scopus & Elsevier Fingerprint Engine™
The property of railway track to resist the irreversible deformation for a long-term operational loading considerably depends on the ballast layer. The ballast layer is the element of a railway track whose mechanical properties and state are formed ... The elements of the periphery are three electromagnetic shakers that create a series of ...
Electromagnetic properties of railway ballast. In: Forde MCR, editor. Proceedings of the First International Conference on Maintenance and Renewal of Permanent Way and Structures. Railway Engineering 1998, London, 10 July 1998, pp. 21–27. Google Scholar [4] Hugenschmidt J. Railway track inspection using GPR—some examples from …
This paper considers in detail how electromagnetic properties of trackbed materials, relating to varying degrees of ballast fouling and moisture content, affect attributes derived from reflected and scattered GPR signals. It is shown that the inherent ambiguities in the response of GPR to fouling and moisture within the trackbed mean that ...
The overall aim of this project was to relate ground penetrating radar (GPR) to a ballast fouling index (FI). Laboratory research aimed at characterising the electromagnetic properties has …
Railway ballast is fundamental to be properly maintained [9] in view of a number of fundamental functions, such as i) resisting vertical, longitudinal and lateral stresses applied to …