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http://dx.doi.org/10.7843/kgs.2021.37.11.71

A Study on Reliquefaction Behavior of Railway Embankment Using 1g Shaking Table Test  

Chae, Minhwan (Advanced Infrastructure Research Team of Korea Railroad Research Institute)
Yoo, Mintaek (Railroad Structure Research Team, Korea Railroad Research Institute)
Lee, Il-Wha (Advanced Infrastructure Research Team of Korea Railroad Research Institute)
Lee, Myungjae (Railroad Structure Research Team, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.37, no.11, 2021 , pp. 71-81 More about this Journal
Abstract
The purpose of this study is liquefaction phenomenon was simulated using the 1g shaking table test. Analysis of liquefaction and Re-liquefaction behavior according to the ground conditions was analyzed when an embankment exists above the ground. The soil used in the experiment was silica sand and the ground composition was a liquefied layer of 50cm (Case 1), a non-liquefied layer of 17.5cm and a liquefied layer of 32.5cm (Case 2). The embankment was formed by fixing the height of 10cm and the slope of the slope at a ratio of 1:1.8. For seismic waves, excitation of a 5Hz sine wave was performed for 8 seconds, and a total of 5 case excitations were performed. In Case 1, it was confirmed that liquefaction occurred at all depths during the first vibration excitation at the free-field and that liquefaction did not occur at all depths except 5cm at the third vibration excitation. At the center of the embankment, liquefaction occurred up to a depth of 20cm during the first vibration excitation, and it was confirmed that liquefaction did not occur at all depths except for a depth of 5cm during the second vibration excitation.
Keywords
1g shaking table test; Embankment; Excess pore pressure; Liquefaction; Reliquefaciton;
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