Evaluation of Dynamic Resistance for Application of Portable In-situ Device to Extra Target Depth

Sang Yeob Kim, Jong Sub Lee, Geunwoo Park, Won Taek Hong

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The strength profiles of the subgrade must be assessed for the prediction and prevention of geo-hazards. This study aimed to evaluate the dynamic resistance (qd) for the application of an instrumented dynamic cone penetrometer (IDCP). An IDCP test and a cone penetration test (CPT) were conducted at an equivalent site up to the extra target depth. The dynamic cone penetration index (DCPI), N-value (NIDCP), and qd were estimated from the IDCP test, and the static resistance (qc) was measured from the CPT. The test results show that the DCPI, NIDCP, and qc can be used to detect the loose and hard layers; however, the NIDCP might underestimate the strength profile in an extra target depth owing to the excessive energy loss. However, qc has a linearly proportional relationship with qc, which considers the transferred driving energy at the cone tip. Thus, the qd estimated from the IDCP test can be used for reliable strength assessment at the extra target depth.

Original languageEnglish
Pages (from-to)4195-4201
Number of pages7
JournalKSCE Journal of Civil Engineering
Issue number10
Publication statusPublished - 2022 Oct


  • Dynamic resistance
  • Energy loss
  • Extra target depth
  • Instrumented dynamic cone
  • penetrometer
  • Static resistance

ASJC Scopus subject areas

  • Civil and Structural Engineering


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