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http://dx.doi.org/10.14481/jkges.2020.21.6.5

Liquefaction Assessment Variations with Regard to the Geotechnical Information Considering of Critical Depth for Liquefaction  

Song, Sungwan (Department of Civil & Environmental Engineering, Dankook University)
Kim, Hansaem (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources)
Cho, Wanjei (Department of Civil & Environmental Engineering, Dankook University)
Publication Information
Journal of the Korean GEO-environmental Society / v.21, no.6, 2020 , pp. 5-11 More about this Journal
Abstract
Recently, due to the liquefaction caused by earthquakes in Pohang and surrounding areas, the importance of researches on the liquefaction assessment has increased. The possibility of liquefaction can be assessed using the geotechnical information. The cyclic resistance ratio (CRR) value used in the assessment of liquefaction can be determined by using the SPT-N values or shear wave velocity, Vs value. A study was conducted to compare the accuracy of the liquefaction assessment using these two types of geotechnical information, and concluded that the results using SPT-N values are more accurate than those using Vs values. The previous study speculated that the used Vs value was measured at a depth of 12 m uniformly without considering the critical depth of liquefaction. Therefore, 10 empirical equations that convert SPT-N values measured at critical depth of liquefaction into Vs values to confirm the validity of geotechnical information measured at 12 m points uniformly are used to assess the liquefaction possibility and the results were compared with the actual liquefaction results to confirm the accuracy. As a result, 7 out of 10 cases considering critical depth for liquefaction show higher accuracy than those not considered.
Keywords
Liquefaction; Ground information; SPT-N value; Shear wave velocity; Liquefaction assessment;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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