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http://dx.doi.org/10.5000/EESK.2020.24.5.211

Liquefaction Prevention and Damage Reduction Effect of Reinforcement by Sheet Pile Using 1-G Shaking Table Test  

Sim, Sung Hun (Department of Civil and Environmental Engineering, Pusan National University)
Yoon, Jong Chan (Department of Civil and Environmental Engineering, Pusan National University)
Son, Su Won (Seismic Simulation Test Center, Pusan National University)
Kim, Jin Man (Department of Civil and Environmental Engineering, Pusan National University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.24, no.5, 2020 , pp. 211-217 More about this Journal
Abstract
Earthquake preparedness has become more important with recent increase in the number of earthquakes in Korea, but many existing structures are not prepared for earthquakes. There are various types of liquefaction prevention method that can be applied, such as compaction, replacement, dewatering, and inhibition of shear strain. However, most of the liquefaction prevention methods are applied before construction, and it is important to find optimal methods that can be applied to existing structures and that have few effects on the environment, such as noise, vibration, and changes in underground water level. The purpose of this study is to estimate the correlation between the displacement of a structure and variations of pore water pressure on the ground in accordance with the depth of the sheet file when liquidation occurs. To achieve this, a shaking table test was performed for Joo-Mun-Jin standard sand and an earth pressure, accelerometer, pore water pressure transducer, and LVDT were installed in both the non-liquefiable layer and the liquefiable layer to measure the subsidence and excess pore water pressure in accordance with the time of each embedded depth. Then the results were analyzed. A comparison of the pore water pressure in accordance with Hsp/Hsl was shown to prevent lateral water flow at 1, 0.85 and confirmed that the pore water pressure increased. In addition, the relationship between Hsp/Hsl and subsidence was expressed as a trend line to calculate the expected settlement rate formula for the embedded depth ratio.
Keywords
Liquefaction; Shaking table tests; Sheet pile; Settlement; Embedded depth ratio; Settlement;
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