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http://dx.doi.org/10.12652/Ksce.2018.38.2.0357

Assessment of Liquefaction Potential Using Correlation between Shear Wave Velocity and Normalized LPI on Urban Areas of Seoul and Gyeongju  

Song, Young Woo (Seoul National University)
Chung, Choong Ki (Seoul National University)
Park, Ka Hyun (Kyung Hee University)
Kim, Min Gi (Seoul National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.38, no.2, 2018 , pp. 357-367 More about this Journal
Abstract
Recent earthquakes in Gyeongju and Pohang have raised interest in liquefaction in South Korea. Liquefaction, which is a phenomenon that excessive pore pressure is generated and the shear strength of soil is decreased by repeated loads such as earthquakes, causes severe problems such as ground subsidence and overturning of structures. Therefore, it is necessary to identify and prepare for the possibility of liquefaction in advance. In general, the possibility of liquefaction is quantitatively assessed using the Liquefaction Potential Index (LPI), but it takes a lot of time and effort for performing site response analysis which is essential for the liquefaction evaluation. In this study, a simple method to evaluate the liquefaction potential without executing the site response analysis in a downtown area with a lot of borehole data was proposed. In this simple method, the correlation between the average shear wave velocity of the target location ground and the LPI divided by thickness of liquefiable layer was established. And the applicable correlation equation for various rock outcrop accelerations were derived. Using the 104 boreholes information in Seoul, the correlation equation between LPI and the shear wave velocity (ground water level: 0m, 1m, 2m, 3m) is obtained and the possibility of liquefaction occurrence in Seoul and Gyeongju is evaluated. The applicability of the proposed simple method was verified by comparing the LPI values calculated from the correlation equation and the LPI values derived using the existing site response analysis. Finally, the distribution map of LPI calculated from the correlation was drawn using Kriging, a geostatistical technique.
Keywords
Liquefaction; Liquefaction potential index (LPI); Correlation; Earthquake;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Sun, C. G. (2004). Geotechnical information system and site amplification characteristics for earthquake ground motions at inland of the Korean peninsula, Ph.D. dissertation, Seoul National University, Seoul, Korea.
2 Sun, C. G., Cho, C. S., Son, M. and Shin, J. S. (2013). "Correlations between shear wave velocity and in-situ penetration test results for Korean soil deposits." Pure Appl. Geophys, Vol. 170, No. 3, pp. 271-281.   DOI
3 Sun, C. G., Kim, H. J. and Chung, C. K. (2008). "Deduction of correlations between shear wave velocity and geotechnical in-situ penetration test data." Journal of the Earthquake Engineering Society of Korea, Vol. 12, No. 4, pp. 1-10.   DOI
4 Youd, T. L. and Idriss, I. M. (2001). "Liquefaction resistance of Soils: summary report from 1996 NCEER and 1998NCEER/NSF workshop on evaluation of liquefaction resistance of soil." Journal Geotech. Geoenviron. Eng., Vol. 127, No. 4, pp. 297-313.   DOI
5 Cho, H. I., Satish, M. and Kim, D. S. (2016). "Site classification and design response spectra for seismic code provisions." Journal of the earthquake engineering society of Korea, Vol. 20, No. 4, pp. 245-256 (in Korean).   DOI
6 Choi, J. S., Shin, C. G., Kim, M. M. and Kim, S. I. (2003). "Case study on the assessment for liquefaction potential in a existing costal structure." Proceedings of 2003 KSCE Conference, Vol. 2003, No. 10, pp. 4070-4075 (in Korean).
7 Chung, C. K., Kim, H. S. and S, C. G. (2014). "Real-time assessment framework of spatial liquefaction hazard in port areas considering site-specific seismic response." Computers and Geotechnics, Vol. 61, pp. 241-253.   DOI
8 Chung, J. W. and Rogers, J. D. (2011). "Simplified method for spatial evaluation of liquefaction potential in the St. Louis area." Journal Geotech. Geoenviron. Eng., Vol. 137, No. 5, pp. 505-515.   DOI
9 Chung, J. W. and Rogers, J. D. (2013). "Influence of assumed groundwater depth on mapping liquefaction potential." Environmental & Engineering Geoscience, Vol. 19, No. 4, pp. 377-389.
10 Iwasaki, T., Tatsuoka, F., Tokida, K. and Yasuda, S. (1978). "A practical method for assessing soil liquefaction potential based on case studies at various site in Japan." 5th Japan Earthquake Engineering Symposium. Vol. II, pp. 641-648.
11 Iwasaki, T., Tokida, K., Tatsuoka, F., Watanabe, S., Yasuda, S. and Sato, H. (1982). "Microzonation for soil liquefaction potential using simplified methods." Proceedings 3rd International Conference on Microzonation, Seattle, USA. pp. 1319-1330.
12 Park, S. S. and Kim, Y. S. (2013). "Liquefaction resistance of sands containing plastic fines with different plasticity." Journal of geotechnical and geoenvironmental engineering, Vol. 139, No. 5, pp. 825-830.
13 Juang, C. H., Liu, C. N., Chen, C. H., Hwang, J. H. and Lu, C. C. (2008). "Calibration of liquefaction potential index: A re-visit focusing on a new CPTU model." Engineering Geology, Vol. 102, No. 1-2, pp. 19-30.   DOI
14 Kim, H. S., Yoo, S. H., Jand, I. S. and Chung, C. K. (2012). "Realtime damage estimation for harbor site considering ground motion amplification characteristics." Journal of the Korean Geotechnical Society, Vol. 28, No. 5, pp. 55-65 (in Korean).   DOI
15 Liao, S. C. and Whitman, R. V. (1986). "Overburden correction factors for SPT in sand." Journal Geotechnical Eng., Vol. 112, No. 3, pp. 373-377.   DOI
16 Luna, R. and Frost, J. D. (1998). "Spatial liquefaction analysis system." Journal Comput. Civil. Eng., Vol. 12, No. 1, pp. 48-56.   DOI
17 Ministry of Land, Infrastructure and Transport (MLIT) (2017), Urban railway seismic design criteria (in Korean), 29-40.
18 Rauch, A. F. (1998). Personal Communication. (As cited in Youd, et. al. (2001)).
19 Seo, M. W., Scott, M. O., Sun, C. G. and Oh, M. H. (2012). "Evaluation of liquefaction potential index along western coast of South Korea using SPT and CPT." Marine Georesources and Geotechnology, Vol. 30, No. 3, pp. 234-260.   DOI
20 Sitharam, T. G., GovindarRaju. L. and Murthy, B. R. S. (2004). "Evaluation of liquefaction potential and dynamic properties of silty sand using cyclic triaxial testing." Geotechnical Testing Journal, Vol. 27, No. 5, pp. 423-429.