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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 4

Large-Scale Testing of Tie Lateral Resistance in Two Ballast Materials

C. Mulhal1, S. Balideh1, R. Macciotta1, M. Hendry1, D. Martin1 and T. Edwards2

1Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
2Canadian National Railway, Edmonton, Canada

Full Bibliographic Reference for this paper
C. Mulhal, S. Balideh, R. Macciotta, M. Hendry, D. Martin, T. Edwards, "Large-Scale Testing of Tie Lateral Resistance in Two Ballast Materials", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 4, 2016. doi:10.4203/ccp.110.4
Keywords: ballast, lateral resistance, railway, railway tie, tie to ballast interface, track substructure. .

Summary
Large-scale tests were performed to compare the lateral resistance that develops between ties (or sleepers) and two types of ballast material. Ballast Type 1 consists of crushed, angular to sub-angular particles, and is an important source of ballast material in Western Canada. Ballast Type 2, crushed Gravel Ballast, contains rounded and crushed angular particles. Three components of the tie/ballast interface provide lateral resistance within a track system: base resistance, crib (side) resistance, and shoulder (end) resistance. The base resistance, which is a function of normal load, was investigated and reported in this paper. The effects of the crib and shoulder ballast are to be determined in a subsequent test. Normal loads between 5 kN and 160 kN were applied during testing, and are representative of the expected range of in-service train loads transferred to an individual railway tie. Preliminary results indicate that on average 9.4% less lateral resistance is developed between the tie and the gravel ballast than the McAbee ballast.

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