Numerical and theoretical analysis of geosynthetic encased stone column composite foundation under cyclic loading

Junli Gao; Xuelei Xie; Jiajun Wang; Lu Liu; Wenjie Zhang

doi:10.1590/1679-78256979

Numerical and theoretical analysis of geosynthetic encased stone column composite foundation under cyclic loading

Authors

Junli Gao School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China https://orcid.org/0000-0002-8644-7553
Xuelei Xie School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China https://orcid.org/0000-0003-4021-0021
Jiajun Wang School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China https://orcid.org/0000-0001-5753-3981
Lu Liu School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China https://orcid.org/0000-0002-2910-866X
Wenjie Zhang School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072 https://orcid.org/0000-0002-1645-562X

DOI:

https://doi.org/10.1590/1679-78256979

Abstract

In this paper, a model of the composite foundation reinforced with geosynthetic encased stone columns was established using the discrete element method, and the characteristics of its action under cyclic loading were studied. The influence of the length and radius of the pile on the settlement of the composite foundation is analyzed. The deformation characteristics of the pile and the stress ratio of pile-soil are studied under different pile lengths and radius. Then, based on this, the analysis of the lateral deformation characteristics of the piles under cyclic loading, the calculation model of the geosynthetic encased pile composite foundation is established. The settlement calculation formula of the composite foundation is solved according to the deformation coordination relationship between the pile and soil, the equilibrium condition, and the boundary condition. The results show that the theoretical value is in good agreement with the simulation value, which verifies the rationality of the theoretical calculation formula.

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Published

2022-02-10

Issue

Vol. 19 No. 2 (2022)

Section

Articles

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