Correlations of Undrained Shear Strength Based on CPTu Tests for Clayey Soils in Macau

Junwu Zhang; Yuliang Chen; Guanzheng Wu; Lei Li; Ziming Zeng

doi:10.2991/978-94-6463-793-9_69

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Correlations of Undrained Shear Strength Based on CPTu Tests for Clayey Soils in Macau

Authors

Junwu Zhang¹, Yuliang Chen¹, Guanzheng Wu²^{, 3}^{, 4}, Lei Li²^{, 3}^{, 4}^{, *}, Ziming Zeng²^{, 3}^{, 4}

¹China Road & Bridge Corporation, No. 88 C, Andingmenwai Avenue, Beijing, 100011, China

²Guangzhou Construction Co. Ltd., No. 4 Guangwei Road, Yuexiu District, Guangzhou, 510030, China

³Guangzhou Municipal Construction Group Co. Ltd., No. 4 Guangwei Road, Yuexiu District, Guangzhou, 510030, China

⁴Guangzhou Design Institute Group Co. Ltd., 3 Tiyu-Dongheng Street, Guangzhou, 510620, China

^*Corresponding author. Email: lilei@gzdi.com

Corresponding Author

Lei Li

Available Online 28 July 2025.

DOI: 10.2991/978-94-6463-793-9_69 How to use a DOI?
Keywords: piezocone penetration test (CPTu); undrained shear strength; Macau; soil behavior type index; correlation analysis
Abstract: For decades, studies have used a semi-empirical method to correlate the undrained shear strength ( s u ) of clay with CPTu profiles; however, extensive experimental data indicate significant variability in the cone factors used in these correlations, which leads to uncertainty in interpreting s u from CPTu results. To address this issue further, this paper collected two types of in-situ experimental data from a coastal area in Macau, including 10 CPTu tests and 13 VST tests. By synthesizing existing research on correlations between CPTu results and s u , a method is introduced that incorporates soil classification before conducting correlation analysis, resulting in the derivation of more accurate cone factors. Various correlation methods and CPTu reading profile ranges are compared. It is derived that, when interpreting s u from CPTu data: the application of ( q t - u 2 ) is not recommended; the range of CPTu profile corresponding to the length of the shear vane is more suitable than other longer ranges.
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title: Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)
Series: Atlantis Highlights in Engineering
Publication Date: 28 July 2025
ISBN: 978-94-6463-793-9
ISSN: 2589-4943
DOI: 10.2991/978-94-6463-793-9_69 How to use a DOI?
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

ris enw bib

TY  - CONF
AU  - Junwu Zhang
AU  - Yuliang Chen
AU  - Guanzheng Wu
AU  - Lei Li
AU  - Ziming Zeng
PY  - 2025
DA  - 2025/07/28
TI  - Correlations of Undrained Shear Strength Based on CPTu Tests for Clayey Soils in Macau
BT  - Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)
PB  - Atlantis Press
SP  - 832
EP  - 846
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-793-9_69
DO  - 10.2991/978-94-6463-793-9_69
ID  - Zhang2025
ER  -

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