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

Canadian Geotechnical Journal - Tập 52 Số 12 - Trang 1993-2007 - 2015
Jianye Ching1, Jiun-Shiang Wang1, C. Hsein Juang2, Chih-Sheng Ku3
1Department of Civil Engineering, National Taiwan University, Taipei, Taiwan
2Glenn Department of Civil Engineering, Clemson University, SC, USA
3Department of Civil Engineering, I-Shou University, Kaohsiung, Taiwan

Tóm tắt

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.

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Canadian Geotechnical Journal

Tập 52 Số 12

1993-2007

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