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Cyclic loading of railway ballast under triaxial conditions and in a railway test facility

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Abstract

A recently developed large-scale triaxial test apparatus for railway ballast testing comprises a double-cell arrangement for measuring volume change by differential pressure. Monotonic and cyclic tests were performed on limestone ballast samples. Axial and volumetric strains and breakage were determined from both types of test. Resilient modulus and Poisson’s ratio were obtained only from the cyclic tests. The permanent axial strain and breakage results from the cyclic tests are compared with the simulated traffic loading in the railway test facility (RTF) which comprises three sleepers embedded in ballast over a subgrade. The traffic loading in the RTF was applied by hydraulic actuators with built-in displacement transducers. A column of painted ballast was placed under a rail seat of the middle sleeper to ease sample collection for sieve analysis at the end of the test. The stress condition in the RTF is predicted by a simple calculation based on findings of previous literature. It was found that the results from the cyclic triaxial test with conditions similar to the predicted conditions in the RTF were comparable to those results from the RTF tests.

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Authors and Affiliations

  1. University of Nottingham, Nottingham, UK

    B. Aursudkij, G. R. McDowell & A. C. Collop

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  1. B. Aursudkij
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  2. G. R. McDowell
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  3. A. C. Collop
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Correspondence to G. R. McDowell.

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Aursudkij, B., McDowell, G.R. & Collop, A.C. Cyclic loading of railway ballast under triaxial conditions and in a railway test facility. Granular Matter 11, 391 (2009). https://doi.org/10.1007/s10035-009-0144-4

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  • DOI: https://doi.org/10.1007/s10035-009-0144-4

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