Evaluating the Correlation Between the Geotechnical Index and the Electromagnetic Properties of Fouled Ballasted Track by a Full-Scale Laboratory Model

To determine the correlation between water content or fouling of a railroad track and ground-penetrating radar (GPR) signals, a full-scale railway track model was designed and constructed at the University of Massachusetts Amherst. A track section was simulated by creating a model consisting of rails and ties placed on a ballast layer on a subballast layer. The model was constructed three times with three fouling percentages. Each model was tested with water-content conditions of dry, field capacity, and two points in between these extremes. Frequency antennae of 450 MHz and 2 GHz were used to evaluate the conditions. The design and construction of the full-scale track in addition to the GPR data analysis and interpretation are presented in this paper. The results show that the dielectric permittivity and frequency spectrum can be used as an indicator of percentage of fouling and water content of a track. In addition, a linear correlation was observed between the percentage of fouling and the water content under field capacity conditions.

[1]  R M Naraynan,et al.  RAILROAD TRACK SUBSTRUCTURE MONITORING USING GROUND PENETRATING RADAR (GPR) , 2001 .

[2]  Eduardo Fortunato,et al.  CHARACTERIZATION OF THE FOULED BALLAST LAYER IN THE SUBSTRUCTURE OF A 19TH CENTURY RAILWAY TRACK UNDER RENEWAL , 2010 .

[3]  P. Anbazhagan,et al.  Model track studies on fouled ballast using ground penetrating radar and multichannel analysis of surface wave , 2011 .

[4]  Jianghai Xia,et al.  The Selection of Field Acquisition Parameters for Dispersion Images from Multichannel Surface Wave Data , 2004 .

[5]  P. Anbazhagan,et al.  Study of Ballast Fouling in Railway Track Formations , 2012 .

[6]  Imad L. Al-Qadi,et al.  Railroad Ballast Fouling Detection Using Ground Penetrating Radar - A New Approach Based on Scattering from Voids , 2006 .

[7]  Michael Forde,et al.  Electromagnetic properties of railway ballast , 2001 .

[8]  Abdesselam Bouzerdoum,et al.  Automatic Classification of Ground-Penetrating-Radar Signals for Railway-Ballast Assessment , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[9]  Ernest T. Selig,et al.  Track Geotechnology and Substructure Management , 1995 .

[10]  Imad L. Al-Qadi,et al.  Data Analysis Techniques for GPR Used for Assessing Railroad Ballast in High Radio-Frequency Environment , 2010 .

[11]  Gary R. Olhoeft,et al.  ASSESSMENT OF RAILWAY TRACK SUBSTRUCTURE CONDITION USING GROUND PENETRATING RADAR , 2003 .

[12]  Buddhima Indraratna,et al.  Mechanics of Ballasted Rail Tracks: A Geotechnical Perspective , 2005 .

[13]  Et Selig,et al.  Railroad Ballast Density Measurement , 1978 .

[14]  Buddhima Indraratna,et al.  An Evaluation of Fouled Ballast in a Laboratory Model Track Using Ground Penetrating Radar , 2010 .

[15]  Ram M. Narayanan,et al.  Contrôle d'infrastructures de voies ferrées par radar à pénétration dans le sol (GPR) , 2001 .

[16]  Michael Forde,et al.  The application of time domain ground penetrating radar to evaluate railway track ballast , 1999 .

[17]  Michael Forde,et al.  Issues over high-speed non-invasive monitoring of railway trackbed , 2004 .

[18]  Ernest T. Selig,et al.  Railway track condition indicators from ground penetrating radar , 2003 .

[19]  Charles P. Oden,et al.  MODEL TRACK STUDIES BY GROUND PENETRATING RADAR (GPR) ON BALLAST WITH DIFFERENT FOULING AND GEOTECHNICAL PROPERTIES , 2015 .

[20]  E T Selig.  COMPILATION OF FIELD MEARSUREMENTS ON BALLAST STATE OF COMPACTNESS , 1989 .

[21]  Theodore R. Sussmann.  Application of ground -penetrating radar to railway track substructure maintenance management , 1999 .

[22]  P Jackson,et al.  Imaging attributes of railway track formation and ballast using ground probing radar , 1999 .

[23]  Imad L. Al-Qadi,et al.  Time-Frequency Approach for Ground Penetrating Radar Data Analysis to Assess Railroad Ballast Condition , 2008 .

[24]  Antti Nurmikolu,et al.  An Inspection of Railway Ballast Quality Using Ground Penetrating Radar in Finland , 2010 .