A study into the mechanical performance of different configurations for the railway track section: A laboratory approach

Sol-Sánchez, M.; Pirozzolo, L.; Moreno-Navarro, Fernando; Rubio-Gámez, M.C.

doi:10.1016/j.engstruct.2016.04.008

Cited by 43 publications

(26 citation statements)

References 9 publications

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“…10. This result correlates well with results obtained by Sol-Sanchez et al, who compared mechanical behaviour of track-bed sections with granular or bituminous sub-ballast [7]. Thus by modifying both the stiffness and damping characteristics of the ballast layer, BSB can effectively reduce deterioration and maintenance associated costs.…”

Section: Fouledsupporting

confidence: 81%

“…Variation of both of these two parameters can improve track-bed performance: low levels of stiffness could increase flexural deformation and consequently the bending moment of the rail (and thus its stresses) as well as track-bed settlement [6,7,45]; on the other hand, increasing the stiffness can lead to higher dynamic forces transmitted by trains that, if not adequately damped, necessarily lead to the deterioration of all components of the track [46]. In this regard, increasing the energy dissipation is appropriate for damping dynamic overloads, reducing track-bed and ground vibrations and therefore maintenance costs [43].…”

Section: Fouledmentioning

confidence: 99%

“…These solutions also allow adjusting track vertical stiffness to a desired level for each specific spot. However, the use of elastic elements within (in high proportion) or below the ballast layer can reduce the bearing capacity and thus may increase the global settlement [6,7].…”

Section: Background Of the Problem And State Of The Artmentioning

confidence: 99%

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Bitumen stabilized ballast: A potential solution for railway track-bed

D’Angelo

Thom

Presti

2016

Construction and Building Materials

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Davide (2016) Bitumen stabilized ballast: a potential solution for railway track-bed. Construction and Building Materials, 124 . pp. 118-126. ISSN 1879-0526 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/36984/1/Accepted%20Manuscript%20-%20Bitumen %20stabilized%20ballast%20-%20A%20potential%20solution%20for%20railway%20track-bed.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the Creative Commons Attribution Non-commercial No Derivatives licence and may be reused according to the conditions of the licence. For more details see: http://creativecommons.org/licenses/by-nc-nd/2.5/ A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. U N C O R R E C T E D P R O O F ARTICLE INFO ABSTRACTRailway ballast degradation under dynamic loads progressively leads to loss of mechanical performance and geometry of the track, so that maintenance interventions are frequently needed. In order to systematically avoid this issue, recently solutions have been proposed to reinforce track-bed by using polyurethane and/or resins as well as asphalt layers among others. Nonetheless, their main limitations are related to the high initial cost and low productivity.To cope with these limitations, in this study, bitumen stabilized ballast (BSB) is proposed as a new solution for ballast stabilization. This method aims at improving durability and reducing settlement by modifying both stiffness and the ability of energy dissipation of the layer. The paper introduces the potential of this technology as material to be used in railway track-beds by presenting the results of a laboratory-based investigation using the Precision Unbound Material Analyser (PUMA). Different variables such as ballast grading, bitumen emulsion dosage, compaction method and stress levels are considered. Results showed a significant decrease in permanent deformation and deformation rate associated with modified stiffness and energy dissipation properties of BSB, which suggest the potential for improving long-term performance and sustainability of ballasted track.

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Section: Fouledsupporting

confidence: 81%

Section: Fouledmentioning

confidence: 99%

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Bitumen stabilized ballast: A potential solution for railway track-bed

D’Angelo

Thom

Presti

2016

Construction and Building Materials

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“…is discussed. In [4], a laboratory research on the mechanical properties of selected resilient elements is presented. The authors analyze different configurations of the track section and indicate solutions that decrease the track stiffness and enhance the capacity to dissipate energy.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to the Analysis of Under Sleeper Pads (USP) Applied in the Ballasted Track Structures

et al. 2020

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The present paper is dedicated to the analysis of under sleeper pads (USP), which are resilient elements used in ballasted track systems as vibration isolators. Four types of USP are considered. The authors present the results of laboratory tests, which are then used as input values for the finite element (FE) and mechanical model of the structure. A special focus is put on the description of an original four-degree-of-freedom (4DoF) mechanical model of the system that includes a fractional rheological model of USP. Using the proposed approaches, the dynamic characteristics of under sleeper pads are determined, and conclusions on vibration isolation effectiveness are drawn.

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“…Meanwhile, it has also been successfully applied in railway structures. Worldwide experience has shown that the use of asphalt materials can offer a good alternative in modern railway construction [8,9]. At present, the application of asphalt layers in railway track systems can be classified into three categories, namely asphalt sub-ballast layer in the ballast railway track, asphalt supporting layer in the ballastless railway track, and the asphalt waterproofing layer in the slab track.…”

Section: Introductionmentioning

confidence: 99%

Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions

et al. 2018

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Abstract:Freeze-thaw damage is a typical distress incurred in road and railway engineering in cold regions. Concrete waterproofing layer is commonly used in high-speed railway tracks to prevent the penetration of surface water, however, it cracks easily under thermal stress, especially in cold regions. Recently solutions have been proposed to increase the waterproofing layer's cracking resistance by using asphalt layers. Nonetheless, the use of emulsified asphalt as well as dense-graded asphalt mixture were not effective enough. To improve the effectiveness, in this study, mastic asphalt was designed for application as the waterproofing layer on the subgrade surface of high-speed railway tracks in cold regions. The overall performance of mastic asphalt was preliminarily evaluated by laboratory tests, then a 200-m test section was constructed for field validation in northeastern China as part of a new high-speed railway line, and water content sensors were placed inside the subgrade to monitor the performance of the mastic asphalt waterproofing layer (MAWL). The subsequent field investigation and monitoring data during the two years operation showed that MAWL dramatically outperformed the conventional concrete waterproofing layer in terms of waterproof performance. Plenty of serious cracks were found in the conventional concrete waterproofing layer, but only a limited number of local cracks were observed in MAWL. As a result, MAWL keeps the water content of subgrade at a stable level. In addition, MAWL showed relatively high stability during the two years investigation period, and no obvious deterioration was observed in the test section.

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A study into the mechanical performance of different configurations for the railway track section: A laboratory approach

Cited by 43 publications

References 9 publications

Bitumen stabilized ballast: A potential solution for railway track-bed

Bitumen stabilized ballast: A potential solution for railway track-bed

A Novel Approach to the Analysis of Under Sleeper Pads (USP) Applied in the Ballasted Track Structures

Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions

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