Quantitative assessment of temperature effect on cone resistance

Changho Lee, Raehyun Kim, Jong Sub Lee, Woojin Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The measurements of a strain gauge type cone penetrometer are influenced by the temperature change during penetration. A real-time temperature compensation technique using a fiber Bragg grating (FBG) sensor is suggested to correct the effect of temperature on cone tip resistance. A 7-mm micro cone penetrometer equipped with FBG sensors and electrical strain gauges was developed to evaluate the suggested technique. Design concepts include the cone configuration, sensor installation and the temperature compensation process. It is shown that the measured cone tip resistance is significantly affected by the temperature; the error increasing with increasing temperature change. The cone tip resistance measured by the FBG sensor is effectively corrected by the real-time compensation method. The qc profile of the strain gauge indirectly corrected by the re-penetration test is quite similar to the real-time compensated profile. It is concluded that the proposed real-time temperature compensation using the FBG sensor is an effective technique to obtain reliable cone tip resistance profiles.

Original languageEnglish
Pages (from-to)3-13
Number of pages11
JournalBulletin of Engineering Geology and the Environment
Volume72
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Cone penetrometer
  • FBG sensor
  • Temperature compensation
  • Temperature effect
  • Tip resistance

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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