electromagnetic properties railway ballast research

Electromagnetic properties of railway ballast

The objectives of the laboratory experiment were: 1. To investigate whether the condition of the railway ballast can be classified by the dielectric constant, εr, — or the velocity of propagation of electromagnetic waves. 2. The suitability of the 500 or the 900 MHz GPR antennas in providing adequate penetration and of producing clear images ...

electromagnetic properties railway ballast research

Assessment of Railway Track Substructure Condition Using rail ballast for sale perth dislessiavareseit. electromagnetic property of the layers is the dielectric permittivity which is a function of the density water content and type of material For railroad applications the GPR equipment is mounted on a hy rail vehicle with clearance between the antennas …

Railway Ballast Monitoring by GPR: A Test Site Investigation

Article. Railway ballast monitoring by GPR: a test site. investigation. Luca B ianchini Ciampoli*, Alessandro Calvi and Fabrizio D'Amico. 1 Department of Engineering, Roma Tre University, Via ...

electromagnetic properties railway ballast research

electromagnetic properties railway ballast research Electromagnetic properties of railway ballast - ScienceDirect. 200171 1. To investigate whether the condition of the railway ballast can be classified by the dielectric constant, εr, — or the velocity of propagation of . Read More An investigation into the railway ballast dielectric

An investigation into the railway ballast dielectric properties using

Non-destructive assessment of the electromagnetic properties of railway ballast aggregates. ... as indicated in several literature research [1], [31], [32]. Therefore, it can be argued that this antenna type is not well suited for the purpose of this study (i.e, the assessment of the dielectric permittivity of limestone railway ballast in clean ...

State-of-the-Art Review of Ground Penetrating Radar (GPR) …

Infrastructure Inspection Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100081, China. (4 authors) 2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China. ... Forde M. Electromagnetic properties of railway ballast. NDT E Int. 2001; 34:305–311. 10.1016/S0963-8695(00)00006-2. [Google ...

Railway ballast performance: Recent advances in the …

Abstract. Railway ballast performance is dictated by a complex mix of mechanical properties. These effect its performance at the particle level for example in …

(PDF) Model Track Studies by Ground Penetrating Radar (GPR) on Ballast

In the present study, a series of in situ GPR surveys on selected railway track sections in Czechia was performed to obtain railway granite ballast relative dielectric permittivity (RDP) values in ...

Discrete element modelling of railway ballast performance …

Railways play a significant role in the transportation system worldwide and work in many sectors (urban rail, high-speed railway, heavy haul, intercity and metro) [1, 2].Ballasted tracks, as the most widely used track type, consist of rails, sleepers and the ballast layer [3, 4].It possesses the advantages such as low construction cost, simple …

Benchmarking large scale GPR experiments on railway ballast

Nevertheless, the application of GPR to assess the ballast condition is a challenging task because the material electromagnetic properties are sensitive to both the ballast grading and water content.

(PDF) Strength Properties and Behavior of Fresh and Abraded Railway …

Railway ballast is an important component of the railroad substructure, providing resistance to forces, distribution of loads to reduce stress on the subgrade, and drainage of water away from the ...

An Inspection of Railway Ballast Quality Using Ground

Some of the current research on GPR for railways involves detecting fouled ballast from a frequency analysis of the electromagnetic responses [59]. A measurement with both track stiffness and GPR ...

Electromagnetic properties of railway ballast

@article{Clark2001ElectromagneticPO, title={Electromagnetic properties of railway ballast}, author={M. R. Clark and Ronald J. Gillespie and T. Kemp and D.M McCann and …

Railroad Ballast Evaluation Using Ground-Penetrating Radar:

The early detection of ballast fouling is of utmost importance to the safety of the rail system and its life-cycle cost-effectiveness. Ground-penetrating radar (GPR), a nondestructive evaluation tool, has shown its potential as a means of assessing the condition of the railroad substructure rapidly, effectively, and continuously.

Benchmarking large scale GPR experiments on railway ballast

Analysis of electromagnetic properties of railway ballast [8]; ... The above research at TTCI was conducted on ballast composed of a clean layer of ballast, over a mixed layer of ballast, over a spent layer of ballast, all of varying thicknesses using horn antennas. This is in contrast to the work reported herein, where GPR research used …

(PDF) MODEL TRACK STUDIES BY GROUND …

Laboratory experiments were undertaken to identify and characterise the dielectric properties of railway track ballast using Ground Penetrating Radar (GPR). Better results were obtained with lower ...

Time-Frequency Approach for Ground Penetrating Radar …

Railroad ballast plays an important role in supporting heavy rail loading, preventing the deformation of track, and providing drainage of water from the track structure. However, over time, ballast is fouled by the breakdown of ballast aggregate and/or the infiltration of fines, which undermine ballast functions. This may result in …

Electromagnetic properties of railway ballast

Electromagnetic properties of railway ballast. In Railway Engineering-98 Proc 1st Int Conf Brunel Univ (pp. 4) Clark, M. R. ; Gillespie, R. ; Kemp, T. et al. / Electromagnetic …

ASSESSMENT OF RAILWAY TRACK SUBSTRUCTURE CONDITION USING GROUND

Ground penetrating radar (GPR) has been employed to assess railway track substructure (ballast, subballast, and subgrade) conditions. GPR involves transmitting radar pulses into the substructure and measuring return signals that have reflected off boundaries between substructure layers with different electromagnetic properties. The principle …

Benchmarking large scale GPR experiments on railway ballast

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 …

A spectral analysis of ground-penetrating radar data for the …

Overall, the GPR-based research on railway ballast can be classified into i) research based on the analysis of the signal response in the time domain and ii) research based on the analysis of the signal spectrum in the frequency domain. ... Electromagnetic properties of railway ballast. NDT&E Int, 34 (5) (2001), pp. 305-311. View PDF View ...

Evaluating the Properties of Railway Ballast Using …

Published 10 Oct 2022. Abstract. 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 …

Railway Ballast Fouling Detection Using GPR Data

Time‐frequency approach for ground penetrating radar data analysis to assess railroad ballast condition. Research in Nondestructive Evaluation 19(4), 219–237. ... Electromagnetic properties of railway ballast. NDT & E International 34(5), 305–311. [Google Scholar] CohenR. 2012.

(PDF) State-of-the-Art Review of Ground Penetrating Radar …

1 Infrastructure Inspection Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing 100081, China; wangshilei@rails ... Ballast Layer Electromagnetic Properties.

(PDF) Railroad Ballast Evaluation Using Ground-Penetrating …

Academia.edu is a platform for academics to share research papers. Railroad Ballast Evaluation Using Ground-Penetrating Radar Laboratory Investigation and Field Validation ... Electromagnetic Properties of Railway Ballast. NDT&E International Journal, Vol. 34, No. 5, 2001, pp. 305–311. 5. Silvast, M., M. Levomaki, A. Nurmikolu, …

Railway Ballast Fouling Detection Using GPR Data

ABSTRACT. Ground‐penetrating radar has been recently used for quantifying railway ballast fouling conditions. This paper discusses two approaches for processing …

Railway Ballast Fouling Detection Using GPR Data: …

Clark et al. (2001) used 500-MHz and 900-MHz antennas to evaluate the dielectric properties of wet/ dry ballast and clean/spent ballast by calculating the two-way travel time of electromagnetic wave. Hugenschmidt (2000) inspected a railway track in Switzerland by estimating the ballast thickness using the two-way travel-time method.

An Entropy-Based Analysis of GPR Data for the Assessment of Railway …

Nevertheless, the application of GPR to assess the ballast condition is a challenging task because the material electromagnetic properties are sensitive to both the ballast grading and water content.

(PDF) Evaluating the Properties of Railway Ballast …

railway ballast collected in Huntington, WV in Feb. 2022 by 400 MHz air-coupled antennas, and the Hilbert transform was chosen to compute the instantaneous frequency of the

Use of Ground Penetrating Radar in Condition Assessment of Railway Ballast

Ground Penetrating Radar (GPR), is a powerful non-destructive geophysical diagnosis method providing cost-efficient, time-saving and continuous railway ballast surveys. To that effect, this ...