Abstract
Among several problems, the railway track is subjected to; spread out of ballast is a major concern, particularly in case of high speed tracks. It has been reported that geosynthetics induce additional confinement onto the ballast and thereby reducing the vertical and lateral deformation of the track substructure. Geocell being three dimensional in geometry is expected to provide better performance improvement. This aspect has been studied under the present investigation through a series of direct shear tests. The test results establish that geocell reinforcement can significantly improve the frictional characteristics of the ballast-capping interface and therefore can arrest the lateral spreading of ballast mass substantially. The performance improvement is found to be maximum when the pocket size of geocells is about twice that of the average size of ballasts (D 50).
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