Characterizing spatial variability of cone penetration testing through geostatistical evaluation

D. A. Saftner, R. A. Green, R. D. Hryciw, M. F. Fadden, A. DaCosta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Geostatistical methods are used to quantify the spatial variability in cone penetration test (CPT) tip resistance at a site in southwest Indiana. Spatial variability of soil properties affects all geotechnical projects. Geostatistical tools provide a method to both predict the properties at unsampled locations and to quantify their uncertainty. Universal kriging is a geostatistical method that accounts for a variable mean, such as a varying mean tip resistance in different soil layers, when making predictions. In this paper, universal kriging is applied to a database of CPT results. Because CPT tip resistance shows greater variability with depth than with lateral distance, a method of accounting for greater correlation between measurements in the lateral direction than with depth is presented. Finally, cross-validation, or the removal of measured points from the database and use of the model to predict the known results, is used to validate the geostatistical model.

Original languageEnglish (US)
Title of host publicationGeoRisk 2011
Subtitle of host publicationGeotechnical Risk Assessment and Management - Proceedings of the GeoRisk 2011 Conference
Pages428-435
Number of pages8
Edition224 GSP
DOIs
StatePublished - Aug 25 2011
EventGeoRisk 2011: Geotechnical Risk Assessment and Management - Atlanta, GA, United States
Duration: Jun 26 2011Jun 28 2011

Publication series

NameGeotechnical Special Publication
Number224 GSP
ISSN (Print)0895-0563

Other

OtherGeoRisk 2011: Geotechnical Risk Assessment and Management
CountryUnited States
CityAtlanta, GA
Period6/26/116/28/11

Keywords

  • Cone penetration tests
  • Geohazards
  • Indiana
  • Soil properties

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