OasisLMS

This study shall demonstrate the soft clay improvement technique using the prefabricated vertical drain with staged loading beneath the high railway embankment in Bangladesh. The height of the railway embankment is 5 to 13m, with 2m stability berm on each side and a 6.850m fixed crest width. The railway alignment passes through the fish culture ponds and paddy field, which make the subsoil very soft in consistency. The thickness of soft clay beneath the embankment is more than 10-25m. The PVDs penetrate the soft clay into 7.5m depth at a triangular pattern with 2.5m c/c.Along with field monitoring of the settlement concerning time-fill height, monitoring segment to segment of embankments shall be studied and compared with design output. Possible reasons for the discrepancy between design output and field monitoring shall be identified through this study. Finally, the stability of the embankment shall be evaluated by post-construction geotechnical investigation campaigns.

Mahabub Sadiq, Khulna University of Engineering & Technology, Bangladesh; Rokibul Titu, Khulna University of Engineering & Technology, Bangladesh; Tirthankar Jana, Ircon International Limited

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