Assessment of stiffness parameters of stone columns
Assessment of stiffness parameters of stone columns
This paper presents theoretical formulations for determining stiffness parameters of stone columns that can be evaluated from the results of load tests, such as: Young's moduli, confined moduli (oedometric), triaxial moduli and moduli of subgrade reaction. Theoretical examples and real load test measurements are presented, where different stiffness parameters of stone columns are compared, and recommendations are provided for proper characterization of these stiffness parameters, aimed to facilitate their use in numerical calculations with advanced constitutive models, as well as for simplified analytical calculations. As conclusions, based on these theoretical assessments and the experience, it is indicated that regardless of the installation method, the moduli of stone columns should be evaluated under triaxial conditions and adopting values from 20 to 100 MPa, approximately. Moduli higher than 120 MPa may imply risky overestimations.
Enmanuel Carvajal Diaz; Pablo Ruiz-Teran; Jorge Castro; Marina Miranda
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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