Mitigation Measures for Open Lines against Vibration and Ground-Borne Noise: A Swiss Overview

Müller, Roger

doi:10.1007/978-3-540-74893-9_37

Cited by 18 publications

(7 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, relatively dense 10 mm thick (static stiffness 0.2 N/mm 3 ) rubber mats were used on top of the concrete base. In actual practice, rubber mats are more effective when the support is stiffer, such as in tunnels and on concrete bridges (Müller 2008;Alves Costa et al 2012). Increasing the thickness of the elastic layer or using an elastic element to reduce stiffness beyond the optimum value can cause excessive plastic deformation of ballast, as well as fatigue damage to other track components (Hunt 2005).…”

Section: Resultsmentioning

confidence: 99%

“…This issue becomes even more critical for shared lines where tracks carry faster passenger trains and heavy haul trains. In terms of performance, rubber mats installed in stiffer foundations are much more efficient than mats installed in open lines (Lombaert et al 2006;Müller 2008). In this view, large-scale triaxial tests were undertaken at the University of Wollongong, Australia to investigate the stress-strain and degradation behavior of ballast stabilized with rubber mats over a stiff subgrade boundary.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Use of Rubber Mats to Improve the Deformation and Degradation Behavior of Rail Ballast under Cyclic Loading

Navaratnarajah

Indraratna

2017

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

The deterioration of a rail track due to large dynamic wheel loads is inevitable over the years, and one that leads to frequent and high maintenance costs. This problem is more critical in isolated rail track locations such as bridges and tunnels where the substructure is much stiffer than the surface track assembly. One measure used to minimize track deterioration is to place geosynthetic inclusions such as rubber mats under the layer of ballast. In this study, cyclic loads from fast and heavy haul trains were simulated on stiffer track foundation conditions using a large-scale process simulation triaxial (prismoidal) apparatus (PSPTA) to investigate the 2 performance of ballast improved by rubber mats locally manufactured from recycled tires. The laboratory results indicate that the energy absorbing (damping) characteristics of rubber mats reduce the amount of deformation and degradation of ballast under stiffer track conditions. The study shows that rubber mats distribute the stress applied from moving trains more uniformly by increasing the effective contact area, which then reduces the dynamic amplification of applied vertical stress and contributes to much less ballast degradation.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Use of Rubber Mats to Improve the Deformation and Degradation Behavior of Rail Ballast under Cyclic Loading

Navaratnarajah

Indraratna

2017

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

show abstract

“…7,8 In another study, Mu¨ller has investigated the UBM insertion loss in technical report framework for International Union of Railways (UIC). 9,10 In another research, Bruni et al 11 developed a numerical model in conjunction with some experimental studies to show the ballast mat effect on reduction of traininduced vibrations in metro lines and especially in tram turnouts. Moreover, some recent field observations were reported by Dold and Potocan 12 which confirms the reliable long-term behavior of ballast mat over the bridge deck in controlling the ballasted track resiliency and increasing the ballast life.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of the dynamic behavior of ballasted track containing ballast mixed with TDA

Esmaeili

Ebrahimi

Sameni

2016

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

The phenomenon of track rigidity in desert areas due to sand dune movement and ballast contamination is one of the most important causes of ballasted railway track degradation and consequently increase in train-induced vibrations. In addition to looking at the existing methods for reducing the track rigidity such as using ballast mat and installing the under sleeper pad, this paper focuses on evaluating the dynamic behavior of railway track including ballast mixed with tire-derived aggregate in a field study. Based on prior laboratory tests done by the authors and latest researches, 10 volume percentages of tire-derived aggregate were adopted as maximum suitable amount to be mixed with ballast for decreasing the track rigidity and increasing its damping property maintaining the basic ballasted track capabilities. In this regard, in a test track located in central desert of Iran in Bafgh-Jandagh railway route, the ballast was mixed with 0, 5 and 10% of tire-derived aggregate by tamping machine in three different sections with 20 m lengths. Moreover, another test section in the same route with fully fouled ballast was considered as a critical bench mark. Many tests were carried out on the mentioned sections using impact test method. In the next stage, the operational modal analysis method was utilized to achieve the tested sections' mode shapes, natural frequencies and damping ratios as well as geometrical attenuation from the recorded responses. By knowing the modal properties, numerical models of tracks were developed, and the effect of tire-derived aggregate as well as fouling on track stiffness was evaluated.

show abstract

“…Moreover, 122 studies on the performance of rubber mats under different subgrade conditions while being 123 subjected to varying magnitudes of impact loads are limited. Müller (2008) confirmed that when 124 rubber mats were installed in stiff foundations, they performed differently than when placed on 125 soft subgrade. 126…”

Section: Introduction 70mentioning

confidence: 71%

Improved performance of ballasted tracks under impact loading by recycled rubber mats

Ngo

Indraratna

Rujikiatkamjorn

2019

Transportation Geotechnics

View full text Add to dashboard Cite

Ballasted tracks at transition locations such as approaches to bridges and road crossings experience increasing degradation and deformation due to dynamic and high impact forces, a key factor that decreases the stability and longevity of railroads. One solution to minimise ballast degradation at the transition zones is using rubber energy absorbing drainage sheets (READS) manufactured from recycled tyres. When placed beneath the ballast layer, READS distributes the load over wider area and attenuate of the load over a longer duration thus decreasing maximum stress, apart from reducing the energy transferred to the ballast and other substructure components. Subsequently, the track substructure experiences less plastic deformation and degradation. These mats also provide an environmentally friendly and cost-effective alternative. In this study, a series of large-scale drop hammer impact tests was carried out to investigate how effectively the READS could attenuate impact loads and help mitigate ballast deformation and degradation. Soft and stiff subgrade were used to investigate the loaddeformation response of ballast (with and without READS), subjected to impact loads from a hammer dropped from various heights (hd =100 -250 mm). Laboratory test results show that the inclusion of READS helps to reduce the dynamic impact load transferred to the ballast layer resulting in significantly less permanent deformation and degradation of ballast, apart from significant attenuation of load magnitude and vibration to the underlying subgrade layers.

show abstract

Mitigation Measures for Open Lines against Vibration and Ground-Borne Noise: A Swiss Overview

Cited by 18 publications

References 1 publication

Use of Rubber Mats to Improve the Deformation and Degradation Behavior of Rail Ballast under Cyclic Loading

Use of Rubber Mats to Improve the Deformation and Degradation Behavior of Rail Ballast under Cyclic Loading

Experimental and numerical investigation of the dynamic behavior of ballasted track containing ballast mixed with TDA

Improved performance of ballasted tracks under impact loading by recycled rubber mats

Contact Info

Product

Resources

About