Application of standardized subsurface conditions based on preprocessing of borehole data in Seoul, South Korea

T. K. Chung, H. S. Kim, M. G. Kim, C. K. Chung

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publicationSmart Geotechnics for Smart Societies
PublisherCRC Press
Pages1245-1252
Number of pages8
ISBN (Electronic)9781000992533
ISBN (Print)9781003299127
DOIs
StatePublished - 1 Jan 2023

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