Railway ballast
Railway ballast condition assessment using ground-penetrating radar - an experimental, numerical simulation and modelling development
... fouled ballast condition across all the investigated ...clean ballast aggregates at the top of the tank) has changed in all the investigated cases, due to the requirements of the testing protocol for laying ...
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An entropy-based analysis of GPR data for the assessment of railway ballast conditions
... costs. Railway ballast can be damaged over time by the breakdown of aggregates or by the upward migration of fine clay particles from the foundation, along with capillary ...of railway track ...the ...
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Laboratory investigations for the electromagnetic characterization of railway ballast through GPR
... The experimental tests were carried out using ground- coupled and air-coupled pulsed radar systems [36], all manufactured by IDS Ingegneria dei Sistemi S.p.A. (Fig. 2). The RIS 99-MF Multi Frequency Array Radar-System, ...
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A computer-aided model for the simulation of railway ballast by random sequential adsorption process
... of railway ballast is crucial to preserving the quality standards of a track-bed and ensuring the safety of the ...the ballast layer affects the original layout of the rail tracks and may imply a ...
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Prediction of Lifespan of Railway Ballast Aggregate According to Mechanical Properties of it
... the railway lifespan is the main criterion for selection of the aggregate for ballast and for planning the maintenance of the railroad, it is important to define the relationship between the particle load ...
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INVESTIGATION OF INNER SHEAR RESISTANCE OF GEOGRIDS BUILT UNDER GRANULAR PROTECTION LAYERS AND RAILWAY BALLAST
... the railway super- and substructure is able to stabilise railway track ...andesite railway ballast (31.5/63 mm) and andesite railway protection layer material (0/56 mm), and seven ...
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Efficient practices in railway ballast maintenance and quality assessment using GPR
... maintaining railway ballast is given; hence, the GPR method, pros and cons are discussed in Section 3; then, in Section 4, a scheme of efficient maintenance management is proposed; conclusions and research ...
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SPECIFIC ASSESSMENT METHOD OF RAILWAY BALLAST PARTICLE DEGRADATION BASED ON UNIQUE LABORATORY TEST
... assess railway ballast particle degradation; they are the Los Angeles (EN 1097-2) and the Micro-Deval abrasion (EN 1097-1) ...real railway stress-strain circumstances of ballast materials, and ...
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SPECIAL LABORATORY TESTING METHOD FOR EVALUATION PARTICLE BREAKAGE OF RAILWAY BALLAST MATERIAL
... for ballast material is worldwide required the Los Angeles and Micro-Deval abrasion tests [39, 40] in the railway ballast product standard ...of ballast (it should be noticed that in case of ...
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DISCRETE ELEMENT MODELLING OF PARTICLE DEGARDATION OF RAILWAY BALLAST MATERIAL WITH PFC3D SOFTWARE
... of railway ballast ...of ballast bed ...of railway bal- last not only particle movements in DEM ...accurate ballast breakage, as well as develop assessment methodology related to ...
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Railway Ballast Monitoring by GPR: A Test Site Investigation
... Railway convoys carry on a daily basis a vast amount of commuters, freights and bulk goods by traveling along ballasted tracks. Through the years, role of railways in connecting residential and production poles ...
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A New Technique for Quality Assessment of Railway Ballast Materials
... of railway ballast materials is assessed in this ...of ballast quality is identified, and a technique of performing this is ...new ballast quality index (BQI) is defined in which, the main ...
8
SPECIFIC EVALUATION METHODOLOGY OF RAILWAY BALLAST PARTICLES’ DEGRADATION
... most railway lines in the world have so called traditional ballasted ...assess railway ballast particle degradation and describe the rock physic charac- teristics, but are not suitable for modelling ...
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A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties
... reference grading curves) and GPR laboratory tests (i.e., multi-sized real aggregates of ballast) were performed 8. on comparable test domains[r] ...
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Effects of Redispersible Polymer Powder on Mechanical and Durability Properties of Preplaced Aggregate Concrete with Recycled Railway Ballast
... developed in Japan (Higuchi et al. 1978) and South Korea (Lee et al. 2016). This method, so-called the rapid-hard- ening method, is used to transform a ballasted track into a concrete track by injecting calcium ...
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An investigation into the railway ballast dielectric properties using different GPR antennas and frequency systems
... processed values of dielectrics, computed using the TDSP technique, and the relative dielectric permittivity 378. value of 3.64 calculated by the VMF theoretical method[r] ...
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LABORATORY STUDY ON IMPROVEMENT OF RAILWAY BALLAST USING GEO-CELLS
... Classical railway track basically consists of a flat frame work made up of rails and sleepers, which are supported on ballasted track ...formation. Ballast particles break down and deteriorate progressively ...
5
Experimental Study of Railway Trackbed Pressure Distribution Under Dynamic Loading
... the ballast layer concerning the initial consolidation of the ballast ...the ballast layer particles in ballast layer after tamping of clean and contaminated ...inhomogeneous ballast ...
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Development of fragility curves for railway embankment and ballast scour due to overtopping flood flow
... atop railway embankments are very different from those atop these other embankments, as are the mech- anisms by which overtopping can cause ...to railway embankments via three processes: (a) scour of ...
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RETRACTED:Detection of Permafrost Subgrade Using GPR: A Case Examination on Qinghai Tibet Plateau
... the railway construction, operation and maintenance are brought by the special condi- tions of the Qinghai-Tibet ...Qinghai-Tibet railway, ballast sacks, contaminations, moist areas, packed layers ...
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