Volume 4, Issue 1 (3-2017)
IJRARE 2017, 4(1): 13-27 |
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School of Railway Engineering, University of Science and Technology
Abstract: (2381 Views)
Construction of railway track embankment over a soft subgrade will bring the necessity of using soil improvement methods for bearing capacity and settlement criteria satisfaction. As a practical improvement method, railway embankment filled with geofoam blocks is studied in this paper. First; a bilinear stress-strain model developed in FLAC2D to simulate geofoam embankment behavioral model. Secondly, the stability of a specified height range of geofoam embankments under static and dynamic train surcharges is investigated. Finally; parametric studies are executed to monitor the variation of track dynamic settlement due to embankments height, subgrade un-drained strengths (Cu) and train surcharge amplitude and velocity. Results are verified. Such parameters can significantly affect the track dynamic settlement. Using multivariable regression and least squared methods; analytical equations are derived to quantify an estimation of track dynamic settlement based on participating parameters
Type of Study: Research |
Subject:
Railway track and structures
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