A Numerical Study on Geofoam Application in the Settlement Reduction of Railway Embankments

Esmaeili, Morteza; Khalilian, Valiollah; Khatibi, Fatemeh

doi:10.22068/IJRARE.4.1.13

Volume 4, Issue 1 (3-2017) IJRARE 2017, 4(1): 13-27 | Back to browse issues page

‎ 10.22068/IJRARE.4.1.13

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Esmaeili M, Khalilian V, Khatibi F. A Numerical Study on Geofoam Application in the Settlement Reduction of Railway Embankments. IJRARE 2017; 4 (1) :13-27
URL: http://ijrare.iust.ac.ir/article-1-126-en.html

A Numerical Study on Geofoam Application in the Settlement Reduction of Railway Embankments

Morteza Esmaeili

, Valiollah Khalilian

, Fatemeh Khatibi

School of Railway Engineering, University of Science and Technology

Abstract: (2549 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 FLAC^2D 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

Keywords: Geofoam, Railway embankment settlement, numerical analysis.

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Type of Study: Research | Subject: Railway track and structures