Piezocone Penetration Testing Device

Hydraulic characteristics of soils can be estimated from piezocone penetration test (called PCPT hereinafter) by performing dissipation test or on-the-fly using advanced analytical techniques. This research report presents a method for fast estimation of hydraulic conductivity of overconsolidated soils based on the piezocone penetration test. The method relies on an existing relationship developed for the determination of hydraulic conductivity of normally consolidated soils on-the-fly. The present research revises this relationship so that it can be applied for overconsolidated soils by incorporating a proper correction equation. The revised relationship provides a pore pressure representing the hydraulic conductivity of a hypothetical “equivalent normally consolidated soil”. The revised relationship was developed with piezocone indices (Qt, Fr, and Bq) based on well documented laboratory test and PCPT data. In this regard, PCPT data from Nebraska Department of Transportation (NDOT) was used as a primary data base to determine the correction equation. Then, the proposed revised relationship was verified for other sites in the USA, Canada, and South Korea. This study showed that the proposed method provides a reasonably good prediction of hydraulic conductivity of overconsolidated soils. In addition, the method also accurately predicted the hydraulic conductivity of normally consolidated soils.

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 99p

Subject/Index Terms

Filing Info

  • Accession Number: 01666718
  • Record Type: Publication
  • Report/Paper Numbers: M063, 26-1121-4038-001
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Apr 10 2018 12:45PM