TY - GEN
T1 - Poroelastic analysis of tunnel face advance in low permeability anisotropic ground
AU - Guayacán-Carrillo, L. M.
AU - Sulem, J.
AU - Ghabezloo, S.
AU - Stefanou, I.
N1 - Publisher Copyright:
© 2020 ISRM.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - In this work, pore pressure evolution, induced by excavation of tunnels in low permeability anisotropic ground, is investigated by means of fully coupled hydro-mechanical 3D finite element simulations. The goal is to explore the main trends of the pore pressure evolution with a poroelastic analysis taking into account in one hand, the influence of excavation and face advance rate, and in the other hand, the inherent anisotropy of the material. Main results show that overpressures can be induced before the passage of the face, depending on the anisotropy of the initial stress state and on the interplay between excavation rate and permeability of the rock mass formation. While, after the passage of the face the anisotropy of the pore pressure response around tunnels is mainly related to the anisotropy of the elastic stiffness.
AB - In this work, pore pressure evolution, induced by excavation of tunnels in low permeability anisotropic ground, is investigated by means of fully coupled hydro-mechanical 3D finite element simulations. The goal is to explore the main trends of the pore pressure evolution with a poroelastic analysis taking into account in one hand, the influence of excavation and face advance rate, and in the other hand, the inherent anisotropy of the material. Main results show that overpressures can be induced before the passage of the face, depending on the anisotropy of the initial stress state and on the interplay between excavation rate and permeability of the rock mass formation. While, after the passage of the face the anisotropy of the pore pressure response around tunnels is mainly related to the anisotropy of the elastic stiffness.
UR - https://www.scopus.com/pages/publications/85084672874
M3 - Conference contribution
AN - SCOPUS:85084672874
SN - 9780367422844
T3 - Rock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
SP - 900
EP - 907
BT - Rock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
A2 - da Fontoura, Sergio A.B.
A2 - Rocca, Ricardo José
A2 - Mendoza, José Félix Pavón
PB - CRC Press/Balkema
T2 - 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
Y2 - 13 September 2019 through 18 September 2019
ER -