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Stability Assessment of Underground Karst Cavities Using a Rigid Plastic Finite Element Method RPFEM
Karst cavities are the result of chemical erosion occurring within the carbonate rocks with openings that range from a few millimeters to several meters. They can be a nuisance for engineering structures during the design or construction phase: foundations, underground tunnels, embankments, etc. Despite the challenge of unknown geological features, this study discusses the stability of ground against collapse caused by underground caves by estimating the bearing capacity of a shallow foundation resting on a soil with a cavity using a two-dimensional rigid plastic finite element method (RPFEM) with the Drucker-Prager yield function. The influence of underground caves located within a single-layer ground is discussed. A parametric study considering the effects of the location, the size, the shape of the cavity, and the footing size is conducted. An interesting relationship between bearing capacity and influence zone is drawn based on these parameters. Several failure modes are observed, and the results show the parametric variation of the influence zone and an agreement with other numerical simulations in the literature.
Stability Assessment of Underground Karst Cavities Using a Rigid Plastic Finite Element Method RPFEM
Karst cavities are the result of chemical erosion occurring within the carbonate rocks with openings that range from a few millimeters to several meters. They can be a nuisance for engineering structures during the design or construction phase: foundations, underground tunnels, embankments, etc. Despite the challenge of unknown geological features, this study discusses the stability of ground against collapse caused by underground caves by estimating the bearing capacity of a shallow foundation resting on a soil with a cavity using a two-dimensional rigid plastic finite element method (RPFEM) with the Drucker-Prager yield function. The influence of underground caves located within a single-layer ground is discussed. A parametric study considering the effects of the location, the size, the shape of the cavity, and the footing size is conducted. An interesting relationship between bearing capacity and influence zone is drawn based on these parameters. Several failure modes are observed, and the results show the parametric variation of the influence zone and an agreement with other numerical simulations in the literature.
Stability Assessment of Underground Karst Cavities Using a Rigid Plastic Finite Element Method RPFEM
Lecture Notes in Civil Engineering
Barla, Marco (editor) / Di Donna, Alice (editor) / Sterpi, Donatella (editor) / Insana, Alessandra (editor) / Keba Lukueta, Eric (author) / Isobe, Koichi (author)
International Conference of the International Association for Computer Methods and Advances in Geomechanics ; 2022 ; Turin, Italy
2022-07-31
8 pages
Article/Chapter (Book)
Electronic Resource
English
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