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Determination of Ballast Deposits Characteristics in Conditions of the West Siberian Railway

Abstract

The article examines the problems of the long-exploited roadbed, one of the defects of which is the presence of ballast deposits on the slopes. Ballast deposits are bulk man-made soils, often unloaded on a slope during railway repair works. Developed ballast deposits often cause slopes of embankment slopes, but their physical and mechanical characteristics are currently insufficiently studied. The completed complex of field and laboratory studies with their further cameral processing made it possible to distinguish three main types of ballast deposits and determine their physico-mechanical characteristics. The main types of deposits on the West Siberian Railway are gravel-contaminated ballast material with sand-clay aggregate, contaminated asbestos ballast material and crushed ballast material contaminated with sandy-clay particles and coal dust. Based on the results of the studies, the dependences of physical and strength characteristics on the conventional dynamic soil resistance were obtained; dynamic probing tests were performed near field test points. The obtained dependences of the void factor on the dynamic resistance are described by an exponential function, the dependence of the strength characteristics on the conditional dynamic resistance is linear. In addition, as a result of the pilot studies, a technique has been developed for determining the characteristics of ballast deposits by dynamic sounding in the conditions of the West Siberian Railway. The developed technique allows determining the characteristics of the corresponding types of ballast deposits necessary to perform limit states calculations of the first and the second groups. The proposed methodology was tested at railway facilities and showed high efficiency.

About the Authors

A. L. Lanis
СГУПС
Russian Federation


L. O. Belyakov
СГУПС
Russian Federation


References

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For citations:


Lanis A.L., Belyakov L.O. Determination of Ballast Deposits Characteristics in Conditions of the West Siberian Railway. Bulletin of Siberian State University of Transport. 2018;(2):72-81. (In Russ.)

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ISSN 1815-9265 (Print)