Key aspects on the behaviour of the ballast and substructure of a modern railway track: research-based practical observations in Finland

Nurmikolu, Antti

doi:10.1631/jzus.a12isgt1

Cited by 14 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Owing to the influence of the base plate length (25 m), the peak frequency of the vertical spectral density was 0.2 and 0.85 for PRBT, and the corresponding sensitive wavelengths were 5 and 1.2 m, respectively, representing an approximate proportionality of 25 : 5 : 1:2% 1 1 : 1 5 : 1…”

Section: Discussionmentioning

confidence: 99%

“…These beds have been widely used worldwide owing to their advantages such as good elasticity, high damping capacity, high water permeability, and ease of maintenance. [1][2][3] However, when the train speed increases, the amplitude and frequency of dynamic loads on the ballasted track beds increase. 4,5 The accumulated deformation and uneven settlement of the ballasted beds also increase with an increase in the train speed, [6][7][8] which severely affects the smoothness, stability, and reliability of the highspeed railway.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis on the track quality evolution law of polyurethane-reinforced ballasted track in high-speed railway

Xiao

Jing

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

Polyurethane-reinforced ballasted track (PRBT) can improve the integrity of ballasted track structures and satisfy the high-stability requirements of high-speed railways. In this study, the quality evolution law of PRBT structures after being launched into train service was analyzed, and a reference for structural optimization and maintenance operation was provided. The track geometric state of the PRBT test section of a high-speed railway was measured and monitored for nearly one year after it was launched into operation, and the ballastless track of the adjacent section was selected as a reference. The geometric states of the tracks were evaluated and compared using various parameters, including sliding standard deviation, average standard deviation, and track irregularity spectrum density. Results show that the track quality indexes of the test section, which were in operation for nearly one year, were slightly over the limit. Moreover, the fastener can be finely adjusted for the high-value index sections to further improve the ride comfort. The application effect of PRBT in the subgrade fracture zone was good, which could satisfy the requirements of high-quality transportation as well as the normal operation and maintenance of high-speed railway.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis on the track quality evolution law of polyurethane-reinforced ballasted track in high-speed railway

Xiao

Jing

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

show abstract

“…Concerning the most developed countries (e.g., member states of EU, USA or Japan), typical aggregate demand ranging from 5 to 6 t per capita and year are driven mainly by maintenance or rebuilding of existing infrastructure, although development of new infrastructure such as highspeed railways plays important role as well due to strict requirements on aggregate quality (Indraratna et al 2011;Nurmikolu 2012;Zhang et al 2019).…”

Section: World Production Of Aggregatesmentioning

confidence: 99%

Geomaterials as construction aggregates: a state-of-the-art

Přikryl

2021

Bull Eng Geol Environ

View full text Add to dashboard Cite

“…It is worthy of mention that the railway industry has initiated use of GPR technology in mid-nineties in Europe (mainly in Switzerland, UK, Finland), and North America (Saarenketo 2006). GPR has been used in a wide range of applications for railway infrastructure monitoring including the determination of layer thicknesses (Fernandes et al 2008), investigation of the embankment stability (Sussmann et al 2003;Donohue et al 2011), localisation of trapped water areas (Hyslip et al 2003), indirect estimation of track modulus from GPR (Narayanan et al 2004), detection of permafrost sections (Saarenketo et al 2003;Du et al 2011;Nurmikolu 2012;Guo et al 2015). A repetition of GPR measurements over time allows to predict the deterioration rate of a track substructure (especially ballast) and to control the effectiveness of maintenance activities.…”

Section: Ground Penetrating Radar (Gpr)mentioning

confidence: 99%

Non-destructive Assessment and Health Monitoring of Railway Infrastructures

et al. 2019

View full text Add to dashboard Cite

A continuous increase of the demand for high-speed traffic, freight tonnage as well as of the train operating frequency is worsening the decay conditions of many railway infrastructures. This occurrence affects economy-related business as well as it contributes to raise maintenance cost. It is known that a failure of a railway track may result in tremendous economic losses, law liabilities, service interruptions and, eventually, fatalities. Parallel to this, requirements to maintain acceptable operational standards are very demanding. In addition to the above, a main issue nowadays in railway engineering is a general lack of funds to allow safety and comfort of the operations as well as a proper maintenance of the infrastructures. This is mostly the result of a traditional approach that, on average, tends to invest on high-priority cost, such as safety-related cost, compromising lower-priority cost (e.g., quality and comfort of the operations). A solution to correct this trend can be to move from a reactive to a proactive action planning approach in order to limit more effectively the likelihood of progressive track decay. Within this context, this paper reports a review on the use of traditional and non-destructive testing (NDT) methods for assessment and health monitoring of railway infrastructures. State-of-the-art research on a stand-alone use of NDT methods or a combination of them for specific maintenance tasks in railways is discussed.

show abstract

Key aspects on the behaviour of the ballast and substructure of a modern railway track: research-based practical observations in Finland

Cited by 14 publications

References 7 publications

Analysis on the track quality evolution law of polyurethane-reinforced ballasted track in high-speed railway

Analysis on the track quality evolution law of polyurethane-reinforced ballasted track in high-speed railway

Geomaterials as construction aggregates: a state-of-the-art

Non-destructive Assessment and Health Monitoring of Railway Infrastructures

Contact Info

Product

Resources

About