Results 1 to 10 of about 19,165 (224)

A New High-Efficiency Procedure for Aggregate Gradation Determination of the Railway Ballast by Means Image Recognition Method [PDF]

open access: yesArchives of Civil Engineering, 2013
The mechanical characteristics of the railway superstructure are related to the properties of the ballast, and especially to the particle size distribution of its grains.
Guerrieri M., Parla G.
doaj   +3 more sources

Sleeper end resistance of ballasted railway tracks [PDF]

open access: yesJournal of Geotechnical and Geoenvironmental Engineering, 2014
This paper describes model tests used to investigate how ballast shoulder width and height contribute to a railway sleeper’s resistance to lateral movement for a range of shoulder widths and heights.
Bhandari, A.R., Le Pen, L., Powrie, W.
core   +4 more sources

HRSBallast: A high-resolution dataset featuring scanned angular, semi-angular and rounded railway ballast [PDF]

open access: yesData in Brief, 2020
A high-resolution dataset of digitally scanned railway ballast (HRSBallast) is presented, consisting of 108 individual, digitised samples. The ballast samples were sourced from both a railway test track section located on a heavy haul coal export line in
André Broekman   +2 more
doaj   +2 more sources

Technological evaluation of stones from the eastern region of the state of São Paulo, Brazil, for railway ballast [PDF]

open access: yesScientific Reports
The correct choice of a stone aggregate for railway ballast is directly related to the stability, safety, efficiency, and maintenance costs of the track. The aggregate must meet several criteria to ensure it is the most appropriate material.
Daniela Tomaz Alves   +4 more
doaj   +2 more sources

A Laboratory Study of Pressure Distribution and Residual Settlements in Wide Grading Double Layer Railway Ballast under Long-Term Cyclic Loading [PDF]

open access: yesArchives of Civil Engineering, 2020
Ballast layer has weighty share in the lifecycle costs of railway track. The strict standards and maintenance rules of ballast grading significantly contribute to the ballast costs.
Mykola Sysyn   +3 more
doaj   +1 more source

Quantification of the Mechanized Ballast Cleaning Process Efficiency Using GPR Technology

open access: yesRemote Sensing, 2021
Ground Penetrating Radar (GPR) has been used recently for diagnostics of the railway infrastructure, particularly the ballast layer. To overcome ballast fouling, mechanized ballast cleaning process, which increases track occupancy time and cost, is ...
Anna Borkovcová   +3 more
doaj   +1 more source

Modelling Time-Dependent Flow through Railway Ballast

open access: yesFluids, 2023
In this study, a numerical simulation of fluid flow through railway ballast in the time domain is presented, providing a model for unsteady-state flow.
Raed Alrdadi, Michael H. Meylan
doaj   +1 more source

Numerical modelling of thermal regime of railway track - structure with thermal insulation (Styrodur)

open access: yesJournal of Civil Engineering and Management, 2021
This paper presents the results of numerical modelling of the influence of various factors (geometrical layout of the structural layers of the railway track, climatic factors and ballast fouling) on the freezing of railway track structure with a built-in
Libor Ižvolt   +3 more
doaj   +1 more source

Shear resistance of rubber-ballast composites in simulated water and acid soaked conditions [PDF]

open access: yes, 2016
Ballast is one of the main structures for the railway tracks. It can resist the lateral movement under dynamic loading transferred by the passing trains with repeatedly.
Chan, Chee Ming, SM Johan, Siti Farhanah
core   +3 more sources

Development of fragility curves for railway embankment and ballast scour due to overtopping flood flow [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2016
Fragility curves evaluating a risk of railway embankment fill and track ballast scour were developed. To develop fragility curves, two well-documented events of single-track railway washout during floods in Japan were investigated.
R. Tsubaki   +3 more
doaj   +1 more source

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