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Investigation on Geotextile Behavior under Railway Embankment
M. Esmaeili Assistant Professor, Department of Railway Engineering, Iran University of Science and Technology, Narmak, 16846, Tehran, Iran S. Ebrahimi Research Asst., Department of Railway Engineering, Iran University of Science and Technology, Narmak,16846, Tehran, Iran B. Sanei Moghaddam Research Asst., Department of Railway Engineering, Iran University of Science and Technology, Narmak, 16846, Tehran, Iran
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ABSTRACT |
Stabilization of railway embankment on soft to very soft clayey subgrades has major importance from railway construction and operation points of view. Amongst the variety methods of soft soil stabilization especially in the case of railway embankment construction, utilizing the geotextile material usually facilities track construction and lead to more economical design in major of case. Selection of suitable geotextile material for railway embankment stabilization directly relates on precise evaluation of tensile force which cab be assessed with various closed form or numerical solutions. In this study the behaviour of railway embankment on soft clayey subgrades reinforced with geotextile was investigated. For this purpose two commonly used limit equilibrium method for analyzing the geotextile tensile force compared with nonlinear FEM numerical results. The results comparison, show considerable difference in geotextile tensile force for numerical and limits equilibrium methods in soft to very soft subgrades.
Keywords: geotextile, finite element method, limit equilibrium method, railway embankment.
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