We present the first results of a three-dimensional computational study of face stability for shallow tunnels in soft grounds, accounting for full coupling with water flow. The influence of soil properties is investigated and the long-term numerical results are compared with a widely used uncoupled solution obtained imposing the global limit equilibrium in the drained case. Furthermore, we assess the difficulties of conventional finite elements in capturing the localization of strains which characterizes the kinematics of tunnel face collapse.
Numerical assessment of tunnel face stability below the water table
CALLARI, Carlo
2015-01-01
Abstract
We present the first results of a three-dimensional computational study of face stability for shallow tunnels in soft grounds, accounting for full coupling with water flow. The influence of soil properties is investigated and the long-term numerical results are compared with a widely used uncoupled solution obtained imposing the global limit equilibrium in the drained case. Furthermore, we assess the difficulties of conventional finite elements in capturing the localization of strains which characterizes the kinematics of tunnel face collapse.File in questo prodotto:
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