Experimental and Theoretical Evaluation of Side Tamping Method for Ballasted Railway Track Maintenance

Przybyłowicz, Michał; Sysyn, Mykola; Kovalchuk, Vitalii; Nabochenko, Olga; Parneta, Bogdan

doi:10.21307/tp-2020-036

Cited by 15 publications

(9 citation statements)

References 32 publications

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“…Complex calibration procedures were performed to operate the simulations. [32] Related to discrete element simulations, a lot of laboratory or field tests have to be conducted [33][34][35][36][37], these articles deal with the ballast, ballasted tracks as well as track-vehicle interaction. These kind of models can be simulated in sophisticated computer programs.…”

Section: Summary Of Recent Resultsmentioning

confidence: 99%

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Tutorial on the fragmentation of the railway ballast particles and calibration methods in discrete element modelling

Juhász

Fischer

2021

Acta Tech. Jaurinensis

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This paper presents a short literature review related to the fragmentation of the railway crushed ballast particles. With the help of the processed articles with the main topic of discrete element modelling (DEM) we aim to provide some insight into the international achievements and forward progress of the subject. Rock materials as granular elements can be investigated from several perspectives. The elements can be examined in laboratory conditions purely from the quarry, or even by obtaining already fragmented particles from the real railway tracks. In addition, DEM models can be created by using computer software. This article tackles only a small segment of the literature. Though each DEM topic was unique, they all involved examination of degradation of particles in some way. This review focuses on model building, including particle construction and calibration. The selected publications do not cover the current state of the entire DEM research related to ballast degradation.

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Section: Summary Of Recent Resultsmentioning

confidence: 99%

“…Up-to-date articles [33][34][35][36][37] can be base of further, special numerical modelling problems.…”

Section: Discussionmentioning

confidence: 99%

Tutorial on the fragmentation of the railway ballast particles and calibration methods in discrete element modelling

Juhász

Fischer

2021

Acta Tech. Jaurinensis

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“…The authors of work [20] employed a method of inertial measurements to assess the quality of the subgrade layer underneath a railroad track. The study was performed on homogeneous gravel without inclusions.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Devising a procedure for assessing the subgrade compaction degree based on the propagation rate of elastic waves

Kovalchuk

Kravets

Nabochenko

et al. 2021

EEJET

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This paper reports the analysis of the methods for estimating the technical condition of the subgrade underneath a constructed railroad track or road during its operation. The study results have proven that the issue related to monitoring and controlling high-quality compaction of a heterogeneous subgrade remains relevant and requires the construction of reliable experimental methods for assessing the subgrade degree of compaction. A procedure for determining the compaction of subgrade in the laboratory has been devised, based on inertial microcomputer technologies, which makes it possible to assess the degree of compaction of subgrade soils depending on the propagation rate of an impact's elastic waves. An experimental study has been performed into the propagation rate of elastic waves across a homogeneous subgrade made of coarse-grained sand and a heterogeneous subgrade made of coarse sand with a layer of clay in the middle of the prism. The study results established that the propagation rate of an elastic wave in a heterogeneous subgrade accepts a lower value than the rate of wave propagation in a homogeneous subgrade. Through the dynamic interpretation, by using a discriminant statistical analysis, the characteristic features have been defined in the distribution of accelerations in the body of the homogeneous and heterogeneous subgrade, depending on the degree of compaction, which would make it possible to monitor the state of the subgrade during operation. As the degree of the subgrade soil compaction affects the technical condition of roads

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“…In relation to the above-mentioned technologies and technical solutions, we can mention some special ones such as application of noise and vibration damping layers and elements [2][3][4][5][6]; ensuring lower stress in the railway permanent ways' that result and ensure lower elastic and plastic deformation in the track as well as in the layer structure [7][8]; techniques which provide special work processes, e.g. tamping of wide sleepers or side tamping that does not disturb the dense, compacted sub-ballast layer [9][10]; new and newer technologies ensuring decreased dynamic effects that can result in subsidiary failures (maybe cracking, fracturing, breaking) in the tracks' elements [11]; minimizing the wear of track elements (mainly the rails') [12] and lowering the ballast breakage [13][14][15][16]. The determination of the geometrical deterioration process is also quite important [17][18] for the ability to predict maintenance work.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Glued Insulated Rail Joints Applied to CWR Tracks

Fischer

2021

FU Mech Eng

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This article summarizes the research results related to our own conducted extensive laboratory tests of polymer composite and steel fishplated glued insulated rail joints (GIRJs), namely axial tensile tests as well as vertical static and dynamic tests. The investigation dealt with the examination of GIRJs assembled with steel and special glass-fiber reinforced plastic (polymer composite) fishplates, both of them for CWR railway tracks (i.e. so-called gapless tracks or, in other words, railway tracks with continuously welded rails). The exact rail joint types were MTH-P and MTH-AP, consistently. The MTH P types have been commonly applied for many years in the CWR tracks in Europe, mainly in Hungary. The MTH-AP rail joints consist of fishplates that are produced by the APATECH factory (Russia). They are made of a fiberglass-amplified polymer composite material at high pressure and controlled temperature. This solution can eliminate electrical fishplate lock and early fatigue failures just as it can ensure adequate electrical insulation. The advantage of such rail joints can be that they are probably able to ensure the substitution of the glued insulated rail joints with relatively expensive steel fishplates currently applied by railway companies, e.g. Hungarian State Railways (MÁV). The aim of the mentioned research summarized in this paper is to formulate recommendations on technical applicability and on the technological instructions that are useful in everyday railway operation practice on the basis of the measurements and tests carried out on rail joints in laboratory.

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Experimental and Theoretical Evaluation of Side Tamping Method for Ballasted Railway Track Maintenance

Cited by 15 publications

References 32 publications

Tutorial on the fragmentation of the railway ballast particles and calibration methods in discrete element modelling

Tutorial on the fragmentation of the railway ballast particles and calibration methods in discrete element modelling

Devising a procedure for assessing the subgrade compaction degree based on the propagation rate of elastic waves

Investigation of the Glued Insulated Rail Joints Applied to CWR Tracks

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