Determining minimum data input levels for reliable three-dimensional soil profiling

Debra Laefer, James O'Neill, Derek Williams

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

Abstract

The ultimate goal of the project reported herein was to determine whether or not a readily quantifiable threshold data density could be established to accurately predict subsurface lithology. A study area in Dublin Ireland was selected for its high density of data (567 boreholes in less than 2km 2) and for it being slated for the first phase of the upcoming Dublin metro. Analysis was conducted using the krieging function embedded in ArcGIS based on identifiable lithologies. Difficulties were encounter based on inconsistent labeling and the program's inability to cope with the presence of a single lithology appearing multiple times within a single soil profiles. In an area of 10, 000m2, a minimum data density of 8.0 boreholes predicted bedrock within 0.5m. Whereas in an area of 90, 000m2, a sampling density of 8.3 was per 10, 000m2 was needed to achieve the same accuracy, approximately double of British standards. Copyright ASCE 2009.

Original languageEnglish (US)
Title of host publicationContemporary Topics in In Situ Testing, Analysis, and Reliability of Foundations - Proceedings of Selected Sessions of the 2009 International Foundation Congress and Equipment Expo
PublisherASCE - American Society of Civil Engineers
Pages324-331
Number of pages8
Edition186
ISBN (Print)9780784410226
DOIs
StatePublished - Jan 1 2009
EventContemporary Topics in In Situ Testing, Analysis, and Reliability of Foundations - 2009 International Foundation Congress and Equipment Expo - Orlando, FL, United States
Duration: Mar 15 2009Mar 19 2009

Publication series

NameGeotechnical Special Publication
Number186
ISSN (Print)0895-0563

Other

OtherContemporary Topics in In Situ Testing, Analysis, and Reliability of Foundations - 2009 International Foundation Congress and Equipment Expo
CountryUnited States
CityOrlando, FL
Period3/15/093/19/09

Keywords

  • Bore hole spacing
  • Kriging
  • Lithology
  • Soil boring
  • Statistical analysis

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Laefer, D., O'Neill, J., & Williams, D. (2009). Determining minimum data input levels for reliable three-dimensional soil profiling. In Contemporary Topics in In Situ Testing, Analysis, and Reliability of Foundations - Proceedings of Selected Sessions of the 2009 International Foundation Congress and Equipment Expo (186 ed., pp. 324-331). (Geotechnical Special Publication; No. 186). ASCE - American Society of Civil Engineers. https://doi.org/10.1061/41022(336)42