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Static Behavior of Reinforced Railway Roadbed by Geotextile Bag  

Lee, Dong-Hyun (CTC(주))
Shin, Eun-Chul (인천대학교 토목환경시스템공학과)
Publication Information
Journal of the Korean Society for Railway / v.9, no.2, 2006 , pp. 180-186 More about this Journal
Abstract
In this study, a large-scale laboratory model test, 2-D and 3-D numerical analyses were conducted to verify the reinforcement effect by utilizing geotextile bag on the railway roadbed. Static loading which simulated train load was applied on the geotextile bag-reinforced railway roadbed and also unreinforced railway roadbed, Computer program named Pentagon which is a part of FEM programs was used in the numerical analysis. Based on the results of laboratory test, 2-D and 3-D numerical analyses, the effect of load distribution and settlement reduction was found to be depending on the geotextile characteristics, tensile strength of geotextite, and interface friction angle between geotextile bags. In general, the result of 2-D and 3-D numerical analyses shows lower value than that of laboratory test. Also, the result of 3-D numerical analyses shows lower value than that of 2-D numerical analyses because of its stress transfer effect.
Keywords
Geotextile bag; Railway roadbed; Numerical analysis; Static behavior;
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