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This study presents a novel approach to determining the soil's elastic modulus (E'), a critical parameter in geotechnical engineering, by employing derivative-based methodologies and one-dimensional consolidation test results. The main challenges of traditional methods, such as triaxial CD testing, include high costs, long duration, and complexity in data collection and analysis. This new approach addresses these challenges by applying derivative calculations at a specific reference stress point (Pref), resulting in a tangent equation that accurately represents the soil's compressive behavior. Utilizing the results from one-dimensional consolidation tests not only reduces dependence on costly triaxial CD tests but also ensures high accuracy in evaluating soil mechanical properties. The findings indicate that the E' value obtained from this new method is equivalent to that from triaxial CD tests, confirming the method's feasibility and effectiveness. The unique achievement of this research is the development of a fast, cost-effective, and efficient method for determining the soil's elastic modulus, opening new research directions in the field of geotechnical engineering.

来源平台：INTERNATIONAL JOURNAL OF GEOMATE