Geomechanics and Engineering

  • 제31권6호
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  • Pages.623-635
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  • 2022
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Indirect evaluation of the shear wave velocity of clays via piezocone penetration tests

  • Vinod K., Singh (Soft Clay Engineering Laboratory, Industry-Academy Cooperation, Dong-A University) ;
  • Sung-Gyo, Chung (Department of Civil Engineering, Dong-A University) ;
  • Hyeog-Jun, Kweon (Soft Clay Engineering Laboratory, Industry-Academy Cooperation, Dong-A University)
  • 투고 : 2021.12.01
  • 심사 : 2022.12.15
  • 발행 : 2022.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents the re-evaluation of existing piezocone penetration test (CPTu)-based shear wave velocity (Vs) equations through their application into well-documented data obtained at nine sites in six countries. The re-evaluation indicates that the existing equations are appropriate to use for any specific soil, but not for various types of clays. Existing equations were adjusted to suit all nine clays and show that the correlations between the measured and predicted Vs values tend to improve with an increasing number of parameters in the equations. An adjusted equation, which comprises a CPTu parameter and two soil properties (i.e., effective overburden stress and void ratio) with the best correlation, can be converted into a CPTu-based equation that has two CPTu parameters and depth by considering the effect of soil cementation. Then, the developed equation was verified by application to each of the nine soils and nine other worldwide clays, in which the predicted Vs values are comparable with the measured and the stochastically simulated values. Accordingly, the newly developed CPTu-based equation, which is a time-saving and economical method and can estimate Vs indirectly for any type of naturally deposited clay, is recommended for practical applications.

키워드

과제정보

This work was supported by the Korea Science and Engineering Foundation (KOSEF) Research Program grant funded by the Korean government (MEST) (NRF-2020R1I1A3074225) and by the assistance of the graduate students at Dong-A University, Busan, Korea.

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