The effect of the anisotropic state of stress on the normal force in a deep tunnel preliminary deformable lining
The effect of the anisotropic state of stress on the normal force in a deep tunnel preliminary deformable lining
When deep tunnels are excavated in poor ground, squeezing conditions occur and the design of supports must follow the yielding principle. To this aim, special elasto-plastic elements embedded in the temporary support can be employed. The presence of the elastic-plastic elements radically modifies the ground-lining interaction mechanisms making necessary the use of numerical analyses. Particularly relevant is the case of anisotropic geostatic state of stress. The paper reports and discusses, some results from 2D numerical ground-lining interaction of deformable temporary support with initial non-isotropic stress field. Results of the classic rigid support are also reported and compared.
L. Batocchioni; Salvatore Miliziano; V. Rodriguez Gonzalez
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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