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http://dx.doi.org/10.7782/JKSR.2014.17.6.415

Evaluation of Resilient Modulus for Reinforced Trackbed using Large Triaxial Tests  

Lee, Sung Jin (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Lee, Jin Wook (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Lee, Seong Hyeok (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Sagong, Myung (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Railway / v.17, no.6, 2014 , pp. 415-422 More about this Journal
Abstract
Reinforced trackbeds are an important layer that has a significant effect on the deformation of the track, therefore, a deeper understanding of reinforced trackbeds is necessary. In this paper, we conduct a large triaxial test in order to evaluate the resilient modulus ($M_R$) of reinforced trackbed materials through considering several factors such as the grain size distribution (GSD) and loading conditions. It is identified that the maximum size of the particle, GSD, and compacted water content affect the $M_R$ but the loading frequency does not. Because these tests are performed with consideration of the field environment, the test results are useful for analyzing tracks including reinforced trackbeds. The data are limited to evaluating the parameters of $M_R$ model; however the parameters of the deviatoric and bulk stress models that can be used in various loading conditions are proposed.
Keywords
Railroad; Reinforced trackbed; Resilient modulus; Large triaxial test;
Citations & Related Records
Times Cited By KSCI : 11  (Citation Analysis)
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