electromagnetic properties railway ballast research

Electromagnetic properties of railway ballast - ScienceDirect

2001-7-1  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 frequency antennas. Clear distinctions were obtained between wet and dry and clean and spent ballast.

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Electromagnetic properties of railway ballast - ScienceDirect

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 frequency antennas. Clear distinctions were obtained between wet and dry and clean and spent ballast.

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Imaging attributes of railway track formation and ballast ...

1999-12-1  Trial pitting and portable ballast samplers currently provide one means of assessing and monitoring the composition of railway track formations. A technique has been sought in which the lateral continuity of properties observed in these pits and cores can be assessed quickly with a view to characterising sections of the formation or ballast.

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Characterisation of ballast materials in trackbed using ...

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 ...

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Railroad Ballast Evaluation Using Ground-Penetrating Radar

2019-2-13  by the use of GPR, various research studies have been conducted to optimize the GPR equipment setup and develop innovative data-processing and analysis techniques. Jack and Jackson used 450-and 900-MHz GPR antennae to provide the image attributes of the ballast and subgrade (1). A fixed electromagnetic

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An investigation into the railway ballast dielectric ...

2018-1-1  1. Introduction. The use of ballast aggregates for the construction of railroads is substantial in railway engineering and the effective assessment and health monitoring of their geometric, physical and mechanical properties is an issue of major concern in terms of the safety of the operations and costs of the rail

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Research on Railroad Ballast Specification and Evaluation

Research on Railroad Ballast Specification and Evaluation GERALD P. RAYMOND ... rock, slag, and gravel railway ballast sources are summarized in this paper. Comments are included about the new Canadian Pacific Rail ballast specif i­ ... These two properties, texture and composition, are basis for clas­ ...

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Survey of Railway Ballast Selection and Aspects of ...

2012-2-14  Survey of Railway Ballast Selection and Aspects of Modelling Techniques Master Degree Project ... improve the overall performance of the railway. Frequent research on the track supporting ... Properties of Ballast for the U.K. and Australian Railways [16]..... 11 Table 3: Recommended ...

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(PDF) Model Track Studies by Ground Penetrating Radar

2015-3-23  Laboratory experiments were undertaken to identify and characterise the dielectric properties of railway track ballast using Ground Penetrating Radar (GPR). Better results

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(PDF) Railway Ballast Requirements for High Speed and ...

PDF On Jan 1, 2012, Konstantinos Giannakos and others published Railway Ballast Requirements for High Speed and Heavy Haul Lines: Hardness, Fouling, Life Cycle Find,

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Characterisation of ballast materials in trackbed using ...

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 ...

More

GPR Data Collection and Processing Strategies for Railway ...

2020-7-8  relative to the electromagnetic (EM) response of railway ballast is a matter of wide discussion within the research community. To this effect, railway structures are complex environments that may affect the collection of clear GPR dataset. Amongst others, rebars in concrete sleepers heavily affect

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Track Ballast Fouling and Permeability Characterization by ...

[13][14][15] At signal frequencies below 1 GHz, GPR can be used to detect degraded ballast as the accumulation of fines within the ballast void space alters the electromagnetic (EM) properties of ...

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Research on Railroad Ballast Specification and Evaluation

Research on Railroad Ballast Specification and Evaluation GERALD P. RAYMOND ... rock, slag, and gravel railway ballast sources are summarized in this paper. Comments are included about the new Canadian Pacific Rail ballast specif i­ ... These two properties, texture and composition, are basis for clas­ ...

More

Evaluating the sensitivity of low-frequency ground ...

2017-5-24  It was through the electromagnetic properties that the volumetric amount of fines and moisture present within the ballast and the type of subballast material were altered. The ground-penetrating radar response of each model was simulated using a finite-difference time

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Survey of Railway Ballast Selection and Aspects of ...

2012-2-14  Survey of Railway Ballast Selection and Aspects of Modelling Techniques Master Degree Project ... improve the overall performance of the railway. Frequent research on the track supporting ... Properties of Ballast for the U.K. and Australian Railways [16]..... 11 Table 3: Recommended ...

More

EFFECT OF RAILWAY TRACK ELEMENTS PROPERTIES ON

2015-4-27  The railway track elements (iron rail bars, concrete sleepers, crushed stone layers, base or ballast layer and the subgrade layer) play an important role to resist the stresses resulting from the movement of trains on this track line, the basic purpose for the railway components to

More

(PDF) Railway Ballast Requirements for High Speed and ...

PDF On Jan 1, 2012, Konstantinos Giannakos and others published Railway Ballast Requirements for High Speed and Heavy Haul Lines: Hardness, Fouling, Life Cycle Find, read and cite all the ...

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Design of Ballasted Railway Track Foundations using ...

2017-2-20  The research presented in this thesis focuses on the development of a new design method for ballasted railway track foundations using advanced numerical modelling, with special reference to high speed trains. In recent years, congestion on highways symptomizes that railways

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Automatic Classification of Ground ... - Research Online

2020-10-13  portation, railway plays an important role in daily life. A railway structure typically consists of steel rails, fastening system, sleepers, ballast, subballast and subgrade [9]. The transverse section of a railway is given in Fig. 1. The ballast is an essential component for proper railway functioning.

More

Railroad Ballast Evaluation Using Ground-Penetrating Radar

2018-2-27  by the use of GPR, various research studies have been conducted to optimize the GPR equipment setup and develop innovative data-processing and analysis techniques. Jack and Jackson used 450-and 900-MHz GPR antennae to provide the image attributes of the ballast and subgrade (1). A fixed electromagnetic

More

A Review of Methods for Estimating Ballast Degradation ...

2018-2-26  Significant research has been conducted over the last two decades applying nondestructive ground-penetrating radar (GPR) measurements to evaluate the amounts of both fine-grained particles (fines) and moisture present in railway ballast. ... Changes to the bulk ballast electromagnetic (EM) properties in turn affect GPR wave travel times ...

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Research on Railroad Ballast Specification and Evaluation

Research on Railroad Ballast Specification and Evaluation GERALD P. RAYMOND ... rock, slag, and gravel railway ballast sources are summarized in this paper. Comments are included about the new Canadian Pacific Rail ballast specif i­ ... These two properties, texture and composition, are basis for clas­ ...

More

Surface wave testing for characterization of ballast and ...

Monitoring and identifying the changes in mechanical properties of ballast and foundation soil in a track system are essential to schedule and predict maintenance costs and to improve safety. Unlike qualitative measurements with the electromagnetic waves, for example, Ground Penetrating Radar, wave velocity measurements provide an opportunity ...

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EFFECT OF RAILWAY TRACK ELEMENTS PROPERTIES ON

2015-4-27  The railway track elements (iron rail bars, concrete sleepers, crushed stone layers, base or ballast layer and the subgrade layer) play an important role to resist the stresses resulting from the movement of trains on this track line, the basic purpose for the railway components to

More

University of Wollongong Research Online

2020-10-13  Research Online Faculty of Engineering - Papers (Archive) Faculty of Engineering and Information Sciences 29-12-2008 Dynamic properties of railway track and its components : a state-of-the-art review Sakdirat Kaewunruen Austrak Pty Ltd, [email protected] Alexander Remennikov University of Wollongong, [email protected]

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Management of Ballast Fouling in the Central Queensland ...

2019-6-3  As previously mentioned, ballast will naturally breakdown as part of its normal function. However, general ballast fouling for heavy haul railways is largely being determined by the original railway design, the cumulative effect of the railway operating conditions and the prevalent environmental conditions.

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An Inspection of Railway Ballast Quality Using Ground ...

The maintenance of heavy haul railway lines causes considerable cost and in many cases difficulties to rail traffic. Railway infrastructure management in Finland is important because in many locations the same railway lines are used by both freight and passenger trains. Along with the mixed traffic, the cold climate presents challenges in keeping the track in good condition. There is a great ...

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Automatic Classification of Ground ... - Research Online

2020-10-13  portation, railway plays an important role in daily life. A railway structure typically consists of steel rails, fastening system, sleepers, ballast, subballast and subgrade [9]. The transverse section of a railway is given in Fig. 1. The ballast is an essential component for proper railway functioning.

More

Design of Ballasted Railway Track Foundations using ...

2017-2-20  The research presented in this thesis focuses on the development of a new design method for ballasted railway track foundations using advanced numerical modelling, with special reference to high speed trains. In recent years, congestion on highways symptomizes that railways

More

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