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http://dx.doi.org/10.7782/IJR.2013.6.3.112

Evaluation of Dynamic Properties of Trackbed Foundation Soil Using Mid-size Resonant Column Test  

Lim, Yujin (Dept. of Civil, Environmental and Railroad Engineering, Paichai University)
Nguyen, Tien Hue (POSCO E&C at Hanoi)
Lee, Seong Hyeok (Advanced Infrastructure Research Team, Korea Railway Research Institute)
Lee, Jin-Wook (Advanced Infrastructure Research Team, Korea Railway Research Institute)
Publication Information
International Journal of Railway / v.6, no.3, 2013 , pp. 112-119 More about this Journal
Abstract
A mid-size RC test apparatus (MRCA) equipped with a program is developed that can test samples up to D=10 cm diameter and H=20 cm height which are larger than usual samples used in practice. Using the developed RC test apparatus, two types of crushed trackbed foundation materials were tested in order to get the shear modulus reduction curves of the materials with changing of shear strain levels. For comparison purpose, large repetitive triaxial compression tests (LRT) with samples of height H=60cm and diameter D=30 cm were performed also. Resilient modulus obtained from the LRT was converted to shear modulus by considering elastic theory and strain level conversion and were compared to shear modulus values from the MRCA. It is found from this study that the MRCA can be used to test the trackbed foundation materials properly. It is found also that strain levels of $E_{v2}$ mostly used in the field should be verified considering the shear modulus reduction curves and proper values of $E_{v2}$ of trackbed foundation must be used considering the strain level verified.
Keywords
Mid-size resonant column test; Shear modulus; Trackbed foundation materials; Large repetitive load test; $E_{v2}$;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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