Abstract
The paper presents results of the numerical modelling of the effective-stress evolution in saturated granular soil around the toe of a vertically vibrating pile. The problem is solved in a spherically symmetric formulation using two different types of constitutive models. An incremental hypoplasticity model is used to calculate the stress state after a limited number of cycle at the beginning of the vibration. Further changes in stresses for a large number of cycles are calculated with an explicit cyclic model. The influence of soil permeability and relative density is investigated. It is shown that the cyclic soil deformation results in the reduction of the effective stress around the pile in spite of the pore pressure dissipation in the case of high soil permeability.
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Acknowledgments
The study was financed by the Deutsche Forschungsgemeinschaft as part of the Research Unit FOR 1136 ‘Simulation of geotechnical construction processes with holistic consideration of the stress strain soil behaviour’, Subproject 6 ‘Soil deformations close to retaining walls due to vibration excitations’.
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Osinov, V.A. (2015). Numerical Modelling of the Effective-Stress Evolution in Saturated Soil Around a Vibrating Pile Toe. In: Triantafyllidis, T. (eds) Holistic Simulation of Geotechnical Installation Processes. Lecture Notes in Applied and Computational Mechanics, vol 77. Springer, Cham. https://doi.org/10.1007/978-3-319-18170-7_7
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DOI: https://doi.org/10.1007/978-3-319-18170-7_7
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