Abstract
The shear resistance at the sleeper–ballast interface of a ballasted track is an important contributor in maintaining track stability under faster and heavier axle loads where the ballast undergoes significant lateral sliding. Different types of sleeper–ballast interfaces based on the type of sleeper arrangements, such as concrete sleepers, timber sleepers, and under sleeper pads (USPs) attached to the concrete sleepers influence the lateral stability of railway tracks. Therefore, in this study the shear and degradation behaviour of ballast at concrete–ballast, timber–ballast, and USP–ballast interfaces were examined in the laboratory using large-scale direct shear tests under 60 kPa normal stress. The use of waste materials in the construction of civil infrastructure is gaining a lot of interest in the engineering community. Therefore, in addition to commercial USPs manufactured using raw materials, recycled USPs manufactured from granulates of end-of-life rubber tyres were also tested in this study. The discrete element modelling (DEM) approach was used to predict the shear behaviour of ballast at 30, 90, 120, 150, and 180 kPa normal stresses. The bonded particle model (BPM) was adopted in the DEM to simulate the effects of particle breakage during shearing. The results exhibited that both commercial and recycled USPs significantly improve the shear resistance at the sleeper–ballast interface while reducing particle degradation compared to concrete and timber sleeper interfaces.
Funder
World Bank through the Accelerating Higher Education Expansion and Development (AHEAD) Operation of the Ministry of Higher Education of Sri Lanka
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference40 articles.
1. Esveld, C. (2001). Modern Railway Track, MRT Press.
2. Li, D., Hyslip, J., Sussmann, T., and Chrismer, S. (2015). Railway Geotechnics, CRC Press.
3. Indraratna, B., Salim, W., and Rujikiatkamjorn, C. (2011). Advanced Rail Geotechnology: Ballasted Track, CRC Press. [1st ed.].
4. Navaratnarajah, S.K. (2017). Application of Rubber Inclusions to Enhance the Stability of Ballasted Rail Track under Cyclic Loading. [Ph.D. Thesis, School of Civil, Mining and Environmental Engineering, University of Wollongong].
5. Performance improvement of rail track substructure using artificial inclusions—Experimental and numerical studies;Indraratna;Transp. Geotech.,2016
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献