Abstract
The piezocone penetration test (CPTU) is widely used to estimate the soil properties, in geotechnical engineering. This study focuses on the developed graphical assessment method through existing CPTU-based Ic–k (soil behavior index-hydraulic conductivity) correlations and a proposed new one. Frequency curve graph is extended to the differences of different curves more clearly, by comparing downward trend of curves, calculating areas and introducing derived novel area indexes. The combination of the clarity of frequency curve graphs and the derivative indexes will ensure the suitability and accuracy, especially for engineers. The results of the traditional statistical index and the developed graphic assessment show that the proposed correlations show better performance. Hence, the proposed method could be further applied to different engineering fields.
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Funding
The financial support is from the National Natural Science Foundation of China (Grant Nos. 41902266 and 51878157) and Key R&D and Promotion Projects in Henan Province (tackling key problems in science and technology) (Grant Nos. 212102310275, 202102310240, 202102310572, 212102310967, and 212102310968), Training plan for young backbone teachers in Colleges and universities of Henan Province (2021GGJS116), 2022 science and technology R & D plan of China Railway Construction Group Co., Ltd (22-76D); and Youth Elite Scientists Sponsorship Program by Henan Association for Science and Technology (2022HYTP011).
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Responsible editor: Zeynal Abiddin Erguler
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Zhang, M., Tong, L. A new graphical approach to assess CPTU-based correlations between hydraulic conductivity and soil behavior type. Arab J Geosci 15, 1115 (2022). https://doi.org/10.1007/s12517-022-10357-2
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DOI: https://doi.org/10.1007/s12517-022-10357-2