Cone penetration test (CPT)-based stratigraphic profiling using the wavelet transform modulus maxima method

Jianye Ching, Jiun Shiang Wang, C. Hsein Juang, Chih Sheng Ku

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

In this paper, a stratigraphic profiling approach is proposed based on the soil behavior type index, Ic, obtained from the cone penetration test (CPT). The basic idea of this approach is simple: the layer boundaries can be identified as the points at which a change occurs in the Ic profile. It is shown that these change points can be easily identified using the wavelet transform modulus maxima (WTMM) method. This method is able to accurately pinpoint the locations of change points in the Ic profile and to produce graphs and plots that fit well with engineers’ methods of visualization and intuition. Moreover, by virtue of the fast Fourier transform, the computation is very fast. Case studies show that the WTMM method is effective for the detection of change points in the Ic profile. It is also capable of detecting thin soil layers.

Original languageEnglish
Pages (from-to)1993-2007
Number of pages15
JournalCanadian Geotechnical Journal
Volume52
Issue number12
DOIs
StatePublished - 12 May 2015

Keywords

  • Cone penetration test (CPT)
  • Site investigation
  • Soil behavior type
  • Underground stratification
  • Wavelet transform

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