Influence of Groundwater Fluctuation on Stress-Normalized Cone Resistance (Qtn) and Soil Behavior Type Classification
DOI:
https://doi.org/10.52722/699t5t53Keywords:
CPT, Qtn, groundwater level, effective stress, SBTAbstract
Groundwater level fluctuation affects effective stress and may influence the interpretation of geotechnical parameters derived from Cone Penetration Test (CPT). This study aims to analyze the effect of groundwater fluctuations on stress-normalized cone resistance (Qtn) and its implications for Soil Behavior Type (SBT) classification. Data were obtained from three CPT points (S-05, S-10, and S-11) with simulated groundwater depths of 1 m, 2 m, 3 m, and 4 m. The analysis included effective stress calculation, CPT normalization, and evaluation of Qtn changes and SBT classification. Results show that shallower groundwater levels increase Qtn due to reduced effective stress, with changes reaching up to 181.56% and consistent across all CPT points. However, these changes do not always lead to significant shifts in SBT classification. This study highlights the importance of considering groundwater conditions in CPT-based geotechnical interpretation.
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