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 ...

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.

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 ...

Abstract. The properties of railway ballast material are affected by the local geologies and climatic environments from which the parent rock is sourced. These …

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.

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.

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 …

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

Another research by L. Bianchini Ciampoli et al. examined the effects of particle size on the propagation and scattering of electromagnetic waves in railway ballast layers using the gprMax 2D ...

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.

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 ...

Based on in situ observations and laboratory tests of the materials taken from the site, and the values published for that particular type of ballast (granite) in various studies [31][32][33][34 ...

These were towed along the rail sections by means of a dedicated railway cart. Main electromagnetic parameters of railway ballast were estimated for each scenario using time- and frequency-domain ...

Tosti et al. investigated the dielectric properties of a railway ballast using different GPR antennas and frequency systems [13]. Wang and Liu studied the shearlet transform to remove noise ...

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 ...

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

In view of this, information can be inferred about the layer thicknesses and the materials properties (Fig. 1). 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.

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 …

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.

The long-term goal of this research is to establish the suction and strength characteristics of fouled ballast (including the ballast aggregate) in correlation to ballast fouling and moisture ...

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 …

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 ...

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

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 ...

Non-destructive assessment of the electromagnetic properties of railway ballast aggregates. •. Use of different GPR antennas and frequency systems within a …

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

This paper addresses the use of nondestructive Ground Penetrating Radar (GPR) methodology in the investigation of railway ballast under a diverse set of fouling and moisture conditions through ...

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 ...