Evaluation of the PVD smear zone using micro penetrometer

Raehyun Kim, Young Min Choi, Jong Sub Lee, Woojin Lee

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

3 Citations (Scopus)


In this study, small sized micro cone penetrometers with 3mm, 5mm and 7mm outer diameters are designed and manufactured in order to evaluate the dimension and shape of the smear zone of prefabricated vertical drain (PVD). The tip resistance is measured by using strain gauges and fiber optic sensors attached near the micro cone tip. The PVD smear zone is investigated by a series of radial penetration tests in the clay specimen prepared in a large-scale consolidometer. Almost constant value of the cone tip resistance is measured within the undisturbed zone. The outer boundary of the smear zone is identified as the location where the deviation of the measured cone tip resistance from the constant value is observed. In addition, the significant change in cone tip resistance is observed in the smear zone with remarkably consistent patterns. This study shows that the PVD smear zone has the asymmetric shape and is effectively detected by using micro penetrometer.

Original languageEnglish
Title of host publicationGeoFlorida 2010
Subtitle of host publicationAdvances in Analysis, Modeling and Design - Proceedings of the GeoFlorida 2010 Conference
Number of pages10
Publication statusPublished - 2010
EventGeoFlorida 2010: Advances in Analysis, Modeling and Design Conference - West Palm Beach, FL, United States
Duration: 2010 Feb 202010 Feb 24

Publication series

NameGeotechnical Special Publication
ISSN (Print)0895-0563


OtherGeoFlorida 2010: Advances in Analysis, Modeling and Design Conference
Country/TerritoryUnited States
CityWest Palm Beach, FL


  • Cone penetration
  • Evaluation

ASJC Scopus subject areas

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


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