Optimizing site-specific geostatistics to improve geotechnical spatial information in Seoul, South Korea

Abstract

Subsurface soil and rock profiles are commonly interpreted from borehole log datasets. These datasets include three-dimensional spatial coordinate information, layer information, and standard penetration test results. More reliable spatial distribution of target physical properties can be obtained from additional testing at locations characterized by outlier observations and geotechnical uncertainties. At a given site, irregular measurements typically differ significantly from bulk measurements or proximal observations. In this study, a process for optimizing site-specific geostatistics, which uses geotechnical spatial information and applies optimum outlier thresholds with a multi-clustering method, is proposed to incorporate site-specific geo-layer uncertainties and identify their geotechnical value. Optimized geostatistical characteristic information for geological strata boundaries was derived and verified based on a sequential procedure applied to representative test areas in Seoul, South Korea.

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Funding

The authors wish to express their gratitude for the support from the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM). This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education(NRF-2012R1A1A1017659).

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Correspondence to Han-Saem Kim.

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Kim, H., Kim, H. Optimizing site-specific geostatistics to improve geotechnical spatial information in Seoul, South Korea. Arab J Geosci 12, 104 (2019). https://doi.org/10.1007/s12517-018-4171-5

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Keywords

  • Geotechnical spatial uncertainty
  • Borehole
  • Geostatistical analysis
  • Outlier analyses
  • Clustering