Modelling railway ballasted track settlement in vehicle-track interaction analysis

Grossoni, Ilaria; Powrie, W.; Zervos, A.; Bezin, Yann; Pen, Louis Le

doi:10.1016/j.trgeo.2020.100433

Cited by 36 publications

(11 citation statements)

References 24 publications

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“…It is well known that the cyclic loads that both heavy and high-speed trains transmit to the platform deteriorate the track geometry, producing high maintenance costs (see Gallego et al [22] for a good review of deterioration models). Although maintenance costs depend on many factors, most models establish a relationship between the settlement and the number of load cycles (Grossoni et al [23]). Hence, in general, and following the notation in Figure 1, one can assume that the total loads in each rail (C i and C e ) can be divided into three terms:…”

Section: Maintenance Costmentioning

confidence: 99%

A Graphical Method for Designing the Horizontal Alignment and the Cant in High-Speed Railway Lines Aimed at Mixed-Speed Traffic

et al. 2022

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To realize the design of mixed-traffic railway lines, the choice of radius must ensure a comfortable ride for passenger vehicles, safe freight transport, and acceptable maintenance costs of vehicle wheels and railway infrastructure. This is not a straightforward task, and what is worse, there is a worldwide lack of clear criteria to limit the design parameters involved in the geometric definition of high-speed railway lines. The proof of this is the great number of technical standards (or recommendations) that are applied depending on the period of time, the administrations involved, or the technicians in charge. If the line is going to be aimed at mixed-speed traffic, this indetermination is even more severe, as the different type of trains that are forecasted to use the tracks (with different loads, speeds, etc.) should affect the limits of the design parameters. To begin to solve this problem, this paper aimed (1) to analyze the design parameters and limitation defined in several technical standards that are used to design high-speed railway lines, (2) to propose a graphical method for designing the horizontal alignment (the cant, the radius, and the clothoid), and (3) to apply the method to a real example to compare our proposed design with the original project for a case study in Spain.

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Section: Maintenance Costmentioning

confidence: 99%

A Graphical Method for Designing the Horizontal Alignment and the Cant in High-Speed Railway Lines Aimed at Mixed-Speed Traffic

et al. 2022

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“…Indeed, recent studies show the influence of soil suction on the deformation characteristics of railway formation materials [22]. Furthermore, other variables can affect the performance of the subgrade related to the train type (passenger or freight), axle load, train speed, train configuration, drainage, rail condition, tie spacing, and wheel condition [23][24][25]. Thus, these factors added to the environmental factors can affect the performance of the subgrade and also the global performance of the track structure.…”

Section: Influence Of Subgrade In Design and Performance Of Railroad Track Structuresmentioning

confidence: 99%

A geomechanics classification for the rating of railroad subgrade performance

Correia

Ramos

2021

Rail. Eng. Science

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The type of subgrade of a railroad foundation is vital to the overall performance of the track structure. With the train speed and tonnage increase, as well as environmental changes, the evaluation and influence of subgrade are even more paramount in the railroad track structure performance. A geomechanics classification for subgrade is proposed coupling the stiffness (resilient modulus) and permanent deformation behaviour evaluated by means of repeated triaxial loading tests. This classification covers from fine- to coarse-grained soils, grouped by UIC and ASTM. For this achievement, we first summarize the main models for estimating resilient modulus and permanent deformation, including the evaluation of their robustness and their sensitivity to mechanical and environmental parameters. This is followed by the procedure required to arrive at the geomechanical classification and rating, as well as a discussion of the influence of environmental factors. This work is the first attempt to obtain a new geomechanical classification that can be a useful tool in the evaluation and modelling of the foundation of railway structures.

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“…At present, all types of studies on ballast layer conditions and track geometry defects focus on the relationship between ballast layer deformation and track geometry irregularity [ 65 , 66 , 70 , 71 ]; in particular, focus has been placed on the deterioration of the track quality index in railway sections with serious ballast layer defects (e.g., mud pumping) [ 53 , 72 , 73 , 74 ]. Studies have shown that ballast layer deformation and track irregularity have an approximate proportional relationship.…”

Section: Introductionmentioning

confidence: 99%

State-of-the-Art Review of Ground Penetrating Radar (GPR) Applications for Railway Ballast Inspection

Wang

Liu

Jing

et al. 2022

Sensors

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In the past 20 years, many studies have been performed on ballast layer inspection and condition evaluation with ground penetrating radar (GPR). GPR is a non-destructive means that can reflect the ballast layer condition (fouling, moisture) by analysing the received signal variation. Even though GPR detection/inspection for ballast layers has become mature, some challenges still need to be stressed and solved, e.g., GPR indicator (for reflecting fouling level) development, quantitative evaluation for ballast fouling levels under diverse field conditions, rapid GPR inspection, and combining analysis of GPR results with other data (e.g., track stiffness, rail acceleration, etc.). Therefore, this paper summarised earlier studies on GPR application for ballast layer condition evaluation. How the GPR was used in the earlier studies was classified and discussed. In addition, how to correlate GPR results with ballast fouling level was also examined. Based on the summary, future developments can be seen, which is helpful for supplementing standards of ballast layer evaluation and maintenance.

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Modelling railway ballasted track settlement in vehicle-track interaction analysis

Cited by 36 publications

References 24 publications

A Graphical Method for Designing the Horizontal Alignment and the Cant in High-Speed Railway Lines Aimed at Mixed-Speed Traffic

A Graphical Method for Designing the Horizontal Alignment and the Cant in High-Speed Railway Lines Aimed at Mixed-Speed Traffic

A geomechanics classification for the rating of railroad subgrade performance

State-of-the-Art Review of Ground Penetrating Radar (GPR) Applications for Railway Ballast Inspection

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