Effects of particle size and distribution on strength estimated by dynamic cone penetrometer in arctic region

Sang Yeob Kim, Won Taek Hong, Jong Sub Lee

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

Abstract

Site investigation for the active layer during thawing period is necessary to ensure the ground stability in cold region. For the thawed active layer, the strength of the ground is dependent on the characteristics of soil particles rather than ice amount. The objective of this study is to evaluate the effect of particle size and particle distribution on the strength of soils. The dynamic cone penetrometer instrumented with strain gauges and accelerometer is developed to investigate the active layer in the field. The dynamic cone penetration index (DCPI) is measured for the strength characterization. Furthermore, the dynamic cone resistance is estimated using the transferred energy at the cone tip. The soil samples at 4 different depths are gathered after the dynamic cone penetration test. The particle size at 60% finer (D60) and coefficient of uniformity (Cu) of soil samples are estimated for the comparison with the dynamic penetration index and dynamic cone resistance. Experimental results show that the dynamic cone penetration index increases, and dynamic cone resistance decreases as both particle size and coefficient of uniformity increase. In addition, the dynamic cone resistance is more reliable than dynamic cone penetration index because the transferred energy is considered. This study suggests that the particle characteristics affect the strength of the soils in active layer, and the dynamic cone resistance can be used as an effective tool for the ground investigation.

Original languageEnglish
Title of host publication11th International Conference on Geosynthetics 2018, ICG 2018
PublisherKorean Geosynthetics Society
Pages772-775
Number of pages4
ISBN (Electronic)9781713806080
Publication statusPublished - 2018
Event11th International Conference on Geosynthetics 2018, ICG 2018 - Seoul, Korea, Republic of
Duration: 2018 Sep 162018 Sep 21

Publication series

Name11th International Conference on Geosynthetics 2018, ICG 2018
Volume1

Conference

Conference11th International Conference on Geosynthetics 2018, ICG 2018
CountryKorea, Republic of
CitySeoul
Period18/9/1618/9/21

Keywords

  • Dynamic cone penetration index
  • Dynamic cone resistance
  • Particle distribution
  • Particle size
  • Strength

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Engineering
  • Global and Planetary Change
  • Polymers and Plastics
  • Atmospheric Science

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