Progressive failure mechanisms of geosynthetic-reinforced column-supported embankments over soft soil: Numerical analyses considering the cracks-induced softening
Article
Article Title | Progressive failure mechanisms of geosynthetic-reinforced column-supported embankments over soft soil: Numerical analyses considering the cracks-induced softening |
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ERA Journal ID | 4188 |
Article Category | Article |
Authors | Wang, Heng, Chen, Feng, Shiau, Jim, Dias, Daniel, Lai, Fengwen and Huang, Jianhua |
Journal Title | Engineering Structures |
Journal Citation | 302 |
Article Number | 117425 |
Number of Pages | 20 |
Year | 2024 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0141-0296 |
1873-7323 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.engstruct.2023.117425 |
Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S0141029623018400 |
Abstract | Cement-based columns in combination with geosynthetic reinforcement is a well-established soft ground improvement technique to enhance embankment stability. This paper aims to present a finite-element (FE) study based on a case history of a geosynthetic-reinforced column-supported (GRCS) embankment over soft soil. In this study, the columns are simulated with an advanced Concrete model to simulate the development of possible cracking and induced strain-softening. Numerical results are compared against published centrifuge tests, giving confidence to the established FE model with the Concrete model. New insights into the progressive failure mechanisms of GRCS embankments over soft soil are then discussed by examining the stress paths, internal forces, and cracks, as well as the plastic failure zones of columns. In addition, the role of columns and geosynthetics on the progressive failure mechanisms (failure loads and sequences) is also examined by an extensive parametric study. The results suggest that provided the optimization of compressive and tensile forces in the columns combined with the tensile stiffness of the geosynthetics is put in place, more columns can be mobilized to resist global sliding failure and to improve the bearing capacity of GRCS embankments. |
Keywords | Crack; Strain-softening ; Finite element analysis ; Progressive failure mechanism ; embankment; Geosynthetic-reinforced column-supported |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Fujian University of Technology, China |
CSCEC Strait Construction and Development, China | |
School of Engineering | |
Grenoble Alpes University, France | |
Fuzhou University, China | |
Delft University of Technology, Netherlands |
https://research.usq.edu.au/item/z3wx7/progressive-failure-mechanisms-of-geosynthetic-reinforced-column-supported-embankments-over-soft-soil-numerical-analyses-considering-the-cracks-induced-softening
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