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http://dx.doi.org/10.7843/kgs.2022.38.4.59

Comparison of Liquefaction Assessment Results with regard to Geotechnical Information DB Construction Method for Geostatistical Analyses  

Kang, Byeong-Ju (Geotechnical & Tunneling Dept., Kunhwa Engrg. & Consulting Co., Ltd.)
Hwang, Bum-Sik (Korea Expressway Corporation Research Institute)
Bang, Tea-Wan (Dept. of Civil & Environmental Engrg., Dankook Univ.)
Cho, Wan-Jei (Dept. of Civil & Environmental Engrg., Dankook Univ.,)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.4, 2022 , pp. 59-70 More about this Journal
Abstract
There is a growing interest in evaluating earthquake damage and determining disaster prevention measures due to the magnitude 5.8 earthquake in Pohang, Korea. Since the liquefaction phenomena occurred extensively in the residential area as a result of the earthquake, there was a demand for research on liquefaction phenomenon evaluation and liquefaction disaster prediction. Liquefaction is defined as a phenomenon where the strength of the ground is completely lost due to a sudden increase in excess pore water pressure caused due to large dynamic stress, such as an earthquake, acting on loose sand particles in a short period of time. The liquefaction potential index, which can identify the occurrence of liquefaction and predict the risk of liquefaction in a targeted area, can be used to create a liquefaction hazard map. However, since liquefaction assessment using existing field testing is predicated on a single borehole liquefaction assessment, there has been a representative issue for the whole targeted area. Spatial interpolation and geographic information systems can help to solve this issue to some extent. Therefore, in order to solve the representative problem of geotechnical information, this research uses the kriging method, one of the geostatistical spatial interpolation techniques, and constructs a geotechnical information database for liquefaction and spatial interpolation. Additionally, the liquefaction hazard map was created for each return period using the constructed geotechnical information database. Cross validation was used to confirm the accuracy of this liquefaction hazard map.
Keywords
Cross - Validation; Earthquake; Geotechnical database; GIS; Liquefaction;
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