Journal
COMPUTERS AND GEOTECHNICS
Volume 146, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2022.104740
Keywords
Piles; Vertical vibration; Poroelastic soil; Pile-soil interaction
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Funding
- Open Fund of Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education [LNTCCMA-20220108]
- National Natural Science Foundation of China [52178318, 52008059]
- Natural Science Foundation of Fujian Province [2021J011056]
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This paper presents an analytical solution to describe the dynamic interaction between a single end bearing pile and its surrounding poroelastic soil. The solution considers both the two-phase soil and the pile as three-dimensional continua, allowing for the analysis of wave propagation and its effects on pile response.
This paper presents an analytical solution developed to describe the dynamic interaction between a single end bearing pile subjected to a dynamic axial load on its head, and its surrounding poroelastic soil. The main feature of the solution is that both the two-phase soil and the pile are treated as three-dimensional continua. This allows capturing the propagation of compressional and shear waves in three dimensions, and their effect on pile response. The soil surrounding the pile is treated as porous medium and its response is described with Biot's poroelastic theory, while the pile is treated as linear elastic solid, considering explicitly both vertical and radial pile displacements. The solution yields expressions for the displacement and velocity admittance at the pile head in the frequency domain, and allows computing pile head velocity time histories. These are applied to study the effects of wave propagation in three dimensions on pile response in the frequency-and in the time-domain, and identify the conditions under which these effects may be important for the analysis of piles in practice.
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