Improvement of rail track subgrade using stone columns combined

CRC Press - Taylor & Francis Group
Publication Type:
Conference Proceeding
Proceedings of the 2nd Int'l Conference on Transportation Geotechnics (2nd ICTG) - Advances in Transportation Geotechnics II, 2012, pp. 202 - 206
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This study seeks to identify the effectiveness of ground improvement using stone columns in controlling settlement of soft soils when placed under the dead loads of the rail structure and the large live loads of freight trains. The employed numerical study assesses the relationship between the column position in the track cross section and the overall settlement of the ballasted rail formation. The numerical results show that the overall settlement of the track reduces significantly with the use of stone columns close to the centre of the track and not just under the rail. In addition, application of one layer of geogrids between sub-ballast and sub-grade assists to reduce the maximum settlement of track decreasing the future maintenance costs.
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