Results 211 to 220 of about 129,371 (270)
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, 2020
Ballast layer is a part of railway foundation that its behavior is affected by the properties of constituent particles. The shape of the particles, which affects ballast behavior, is an important characteristic that is represented by angularity and ...
Akbar Danesh, A. Mirghasemi, M. Palassi
semanticscholar +1 more source
Ballast layer is a part of railway foundation that its behavior is affected by the properties of constituent particles. The shape of the particles, which affects ballast behavior, is an important characteristic that is represented by angularity and ...
Akbar Danesh, A. Mirghasemi, M. Palassi
semanticscholar +1 more source
Effect of tamping operation on mechanical qualities of ballast bed based on DEM-MBD coupling method
, 2020Tamping can effectively improve the service performance of a ballasted track. To determine the effect of tamping on the mechanical qualities of a ballast bed, a tamp-sleeper-ballasts coupling model was established based on the coupling of the discrete ...
Shunwei Shi +4 more
semanticscholar +1 more source
, 2020
A ballast bed provides a stable foundation and a sufficient vibration-damping performance for a railway line due to its loose and porous structure. Tamping operations change the compactness of ballast stacks and improve and maintain the state of ballast ...
Jianxin Liu +5 more
semanticscholar +1 more source
A ballast bed provides a stable foundation and a sufficient vibration-damping performance for a railway line due to its loose and porous structure. Tamping operations change the compactness of ballast stacks and improve and maintain the state of ballast ...
Jianxin Liu +5 more
semanticscholar +1 more source
Marine Pollution Bulletin, 2021
Millions of tons of water cross the oceans inside ships' ballast tanks every day. Planktonic species hitch-hike with water and some may pose risks to ecosystems and economies if get released and establish outside their native range.
A. Ardura +3 more
semanticscholar +1 more source
Millions of tons of water cross the oceans inside ships' ballast tanks every day. Planktonic species hitch-hike with water and some may pose risks to ecosystems and economies if get released and establish outside their native range.
A. Ardura +3 more
semanticscholar +1 more source
, 2020
Ballast degradation has a strong effect on railway track performance (including accumulative deformation, ballast resistance, and drainage). The main objective of this research is to determine the evolution of roundness during ballast degradation and ...
Zong-Tang Zhang +4 more
semanticscholar +1 more source
Ballast degradation has a strong effect on railway track performance (including accumulative deformation, ballast resistance, and drainage). The main objective of this research is to determine the evolution of roundness during ballast degradation and ...
Zong-Tang Zhang +4 more
semanticscholar +1 more source
Importance of examining particle movements in modelling ballast bed via discrete element method
International Journal of Rail transportation, 2021The discrete element method is widely adopted to investigate the micro-mechanism of degradation and reinforcement of ballast tracks. Generally, numerical parameters of ballast particles are examined by macro characteristics obtained in field or indoor ...
Longlong Fu +4 more
semanticscholar +1 more source
Geotextiles and Geomembranes, 2020
Vertical stiffness and shear strength of ballasts are significantly degraded when contaminated with sands. There is a lack of solutions/studies related to strengthening ballast against sand contamination.
J. Sadeghi +4 more
semanticscholar +1 more source
Vertical stiffness and shear strength of ballasts are significantly degraded when contaminated with sands. There is a lack of solutions/studies related to strengthening ballast against sand contamination.
J. Sadeghi +4 more
semanticscholar +1 more source
Field assessment of railway ballast degradation and mitigation using geotextile
Geotextiles and Geomembranes, 2020Rail tracks continue to deform due to degradation of ballast under the application of heavy train traffic. The resulting track deformations often lead to drainage impairment as well as loss of resiliency.
R. Singh +3 more
semanticscholar +1 more source
Numerical exploration of the behavior of coal-fouled ballast subjected to direct shear test
, 2021Ballast undergoes gradual and irreversible fouling process during its service life. To explore the influence of fouling materials on the mechanical properties of ballast aggregates, a series of large-scale direct shear tests were carried out on coal ...
Jing Chen +4 more
semanticscholar +1 more source