A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Coupled solid-fluid response of deep tunnels excavated in saturated rock masses with a time-dependent plastic behaviour
This article provides a general numerical approach for modelling the response of deep tunnels excavated in saturated time-dependent plastic rock masses, considering a coupled solid-fluid interaction and time-dependent plastic behaviour. In order to do that, a Burgers-viscoplastic strain-softening model has been developed and implemented into the finite element method software CODE_BRIGHT, and a coupled solid-fluid model is used to simulate the interaction between solid deformations and fluid flow. Parametric analyses are then performed to analyse the influence on the tunnelling response of different time-dependent models, different standstill times and different excavation rates. It has been observed that the time-dependent model selection is crucial to simulate the response of underground excavations. Additionally, the coupled solid-fluid results are significantly different from the purely mechanical ones. The liquid pressure build-up in the vicinity of the tunnel face and the overpressure dissipation with time due consolidation can be accounted for. Moreover, the higher the excavation rate, the larger build-up of liquid pressures occurs. ; This research was supported by the CODE_BRIGHT Project (International Centre for Numerical Methods in Engineering). The first author was supported by a CSC scholarship (No. 201706260240). ; Peer reviewed
Coupled solid-fluid response of deep tunnels excavated in saturated rock masses with a time-dependent plastic behaviour
This article provides a general numerical approach for modelling the response of deep tunnels excavated in saturated time-dependent plastic rock masses, considering a coupled solid-fluid interaction and time-dependent plastic behaviour. In order to do that, a Burgers-viscoplastic strain-softening model has been developed and implemented into the finite element method software CODE_BRIGHT, and a coupled solid-fluid model is used to simulate the interaction between solid deformations and fluid flow. Parametric analyses are then performed to analyse the influence on the tunnelling response of different time-dependent models, different standstill times and different excavation rates. It has been observed that the time-dependent model selection is crucial to simulate the response of underground excavations. Additionally, the coupled solid-fluid results are significantly different from the purely mechanical ones. The liquid pressure build-up in the vicinity of the tunnel face and the overpressure dissipation with time due consolidation can be accounted for. Moreover, the higher the excavation rate, the larger build-up of liquid pressures occurs. ; This research was supported by the CODE_BRIGHT Project (International Centre for Numerical Methods in Engineering). The first author was supported by a CSC scholarship (No. 201706260240). ; Peer reviewed
Coupled solid-fluid response of deep tunnels excavated in saturated rock masses with a time-dependent plastic behaviour
Song, Fei (author) / Rodriguez-Dono, Alfonso (author) / Olivella, Sebastià (author) / Gens, Antonio (author)
2021-12-01
doi:10.1016/j.apm.2021.07.030
Article (Journal)
Electronic Resource
English
DDC:
621
| British Library Online Contents | 2012