TY - CHAP
T1 - Application of standardized subsurface conditions based on preprocessing of borehole data in Seoul, South Korea
AU - Chung, T. K.
AU - Kim, H. S.
AU - Kim, M. G.
AU - Chung, C. K.
N1 - Publisher Copyright:
© 2023 selection and editorial matter, Askar Zhussupbekov, Assel Sarsembayeva & Victor N. Kaliakin; individual chapters, the contributors.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - Local characterization of the geo-layer over a wide area is influenced by spatial uncertainties/differences in borehole data. In this study, the elevation and geo-layer thickness of borehole data in Seoul were standardized using outlier analysis with a 3-sigma model and cross- validation with the leave-one-out method. The borehole data, with or without elevation information, were categorized based on the accuracy of elevation by comparison with the digital elevation model (DEM). According to the errors with DEM, 3-sigma-based outliers were removed from the borehole data. Cross-validation-based mean errors resulting from the 3-sigma model were compared. The boundary elevation of the geo-layer in Seoul was applied based on the average ground conditions using optimum borehole data. The average ground condition method was applied to the boundary elevation of the geo-layer using optimum borehole data and compared with an ordinary kriging to evaluate for accuracy. As a result of comparing the two methodologies, the error tends to increase toward the lower layer. However, the average ground condition could not be applied to the entire area owing to the lack of current borehole data. Thus, additional geophysical data is required in addition to borehole data.
AB - Local characterization of the geo-layer over a wide area is influenced by spatial uncertainties/differences in borehole data. In this study, the elevation and geo-layer thickness of borehole data in Seoul were standardized using outlier analysis with a 3-sigma model and cross- validation with the leave-one-out method. The borehole data, with or without elevation information, were categorized based on the accuracy of elevation by comparison with the digital elevation model (DEM). According to the errors with DEM, 3-sigma-based outliers were removed from the borehole data. Cross-validation-based mean errors resulting from the 3-sigma model were compared. The boundary elevation of the geo-layer in Seoul was applied based on the average ground conditions using optimum borehole data. The average ground condition method was applied to the boundary elevation of the geo-layer using optimum borehole data and compared with an ordinary kriging to evaluate for accuracy. As a result of comparing the two methodologies, the error tends to increase toward the lower layer. However, the average ground condition could not be applied to the entire area owing to the lack of current borehole data. Thus, additional geophysical data is required in addition to borehole data.
UR - http://www.scopus.com/inward/record.url?scp=85171017650&partnerID=8YFLogxK
U2 - 10.1201/9781003299127-179
DO - 10.1201/9781003299127-179
M3 - Chapter
AN - SCOPUS:85171017650
SN - 9781003299127
SP - 1245
EP - 1252
BT - Smart Geotechnics for Smart Societies
PB - CRC Press
ER -