Image analysis for morphology, rheology and degradation study of railway ballast: A review

Guo, Yunlong; Markine, Valéri; Zhang, Xuehui; Qiang, Weile; Jing, Guoqing

doi:10.1016/j.trgeo.2018.12.001

Cited by 63 publications

(28 citation statements)

References 101 publications

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“…The Cluster is able to break because the component discs are bonded together by the parallel bonds. The Cluster breaks when the force applied on them is larger than the defined value [35,43]. The Clump or Clusters are better than using the discs to present ballast particles.…”

Section: Rpb Particle Modelmentioning

confidence: 99%

Discrete Element Modelling of Rubber-Protected Ballast Performance Subjected to Direct Shear Test and Cyclic Loading

Guo

Zhou

et al. 2020

Sustainability

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The rubber-protected ballast (RPB) is made from natural ballast particles and crumb rubber particles. The crumb rubber is shredded waste tires. RPB was chosen to replace the ballast as it has higher resistance to breakage and abrasion. However, the static and dynamic performance of the RPB has not been confirmed yet. Towards this end, experimental tests and numerical simulations were utilized to study the feasibility of RPB application. Direct shear tests (DSTs) were performed and a DST model and three-sleeper track model with the discrete element method (DEM) were built. The shear strength, settlement, displacement, and acceleration of the RPB were studied. The results show that the RPB has the advantage of increasing the force (stress) distribution and that the smaller crumb rubber size was more suitable for replacing the ballast particles.

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Section: Rpb Particle Modelmentioning

confidence: 99%

Discrete Element Modelling of Rubber-Protected Ballast Performance Subjected to Direct Shear Test and Cyclic Loading

Guo

Zhou

et al. 2020

Sustainability

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“…Compared with Figure 14, the greater the contact strength between the sleeper and the ballast is, the faster the settlement speed of the ballast bed is and the greater the settlement is. (1) In this paper, the three-dimensional laser scanning method is used to establish the real model of the ballast, and then the coupling model of the ballast bed and upper track structure with three sleepers is established based on the coupling method of the discrete body and continuous body. e analysis of the contact between three sleepers and ballast shows that the wall boundary has a significant impact on the sleepers, and the coupling model considering only one sleeper has limitations in the calculation process.…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

“…As a key part of the ballast track structure, the ballast bed is mainly composed of crushed stone ballast, which directly suffers the train load transmitted by sleepers. With the increase of train speed, the train load and frequency of track structure expand, which accelerates the accumulated deformation and uneven settlement of the ballast bed [1]. e deterioration of the ballasted track bed increases the track irregularity and enhances the wheel rail power.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Coupling Mechanism between Ballast Bed and Track Structure of High-Speed Railway

Xue-jun

et al. 2020

Mathematical Problems in Engineering

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In this paper, a discrete and continuous body coupling algorithm is used to study the dynamic contact characteristics between ballasts and between ballasts and track structures. Firstly, the three-dimensional fine modeling of ballast particles is realized based on the three-dimensional laser scanning method, and then through the discrete and continuum coupling algorithm from the micro-macro point of view, a multiscale and unified particle-track structure coupling model is established. Based on the coupling model, the macro-and microdynamic characteristics of the ballast bed and the mechanical characteristics of the track structure under the dynamic load of high-speed trains with different driving speeds are studied. It is shown that the cumulative settlement of the ballast bed is directly proportional to the contact force and rotation speed of the ballast, and the faster the driving speed is, the greater the cumulative deposition speed and cumulative settlement of the ballast are. e contact force between the ballast and sleeper mainly comes from the bottom of the sleeper, and its contact force and contact strength increase with the increase of driving speed.

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“…Ballast is one of the important aggregate material, which uses to transfer the loads o soil from the top of rails an sleepers. These are granular aggregates of having the size of 20mm to 60mm for the permanent way [2]. These can be placed directly on sub grade for taking entire loads from the top.…”

Section: Introductionmentioning

confidence: 99%

“…These fines particles may fill the voids between aggregate maybe it leads to loss of bonding between aggregates and maybe a reduction in shear strength of ballast. This failure results in plastic deformation in the track [2]. Track geometry conditions (such as track profile) the ballast and Mechanical behaviors are mainly based on continuous maintenance..…”

Section: Introductionmentioning

confidence: 99%

Assesment to Increase the Mechanical Properties of used Ballast by Edta Solution as a Construction Material

Prabhanjan¹,

Yadav²,

Sahithi³

et al. 2020

IJRTE

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Ballast is playing a vital role in taking the huge loads of railways which is strong, durable and also providing maximum stability to track/permanent way. Usually having a 40mm size ballast. The Shape of the ballast is important as its irregular shape and sharp edges help in the interlocking of themselves which gives more stability and passage of drainage. Within its lifetime the ballast used to get rounded edges, unable to stabilize or interlock and losses its strength for this reduction it should be replaced with new ballast. So the waste ballast is considered as our material to be tested in our project by adding the solution called EDTA (ETHYLENEDIAMINETETRAACETIC ACID) to develop the maximum properties of ballast by crushing them to 10mm, 12.5mm and 20mm size used for road construction. This work was conducted to determine the hardness, toughness, strength of aggregate using EDTA solution. The effectiveness of aggregate using of EDTA was studied in this project by adding required concentrations of 5%, 10% to the aggregates.

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Image analysis for morphology, rheology and degradation study of railway ballast: A review

Abstract: Image analysis for morphology, rheology and degradation study of railway ballast A review

Cited by 63 publications

References 101 publications

Discrete Element Modelling of Rubber-Protected Ballast Performance Subjected to Direct Shear Test and Cyclic Loading

Discrete Element Modelling of Rubber-Protected Ballast Performance Subjected to Direct Shear Test and Cyclic Loading

Modeling of Coupling Mechanism between Ballast Bed and Track Structure of High-Speed Railway

Assesment to Increase the Mechanical Properties of used Ballast by Edta Solution as a Construction Material

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