TY  - EJOU
AU  - Pellet, Frederic L. 

TI  - Contact between a Tunnel Lining and a Damage-Susceptible Viscoplastic Medium
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2009
VL  - 52
IS  - 3
SN  - 1526-1506

AB  - In this study, the contact and interaction between a tunnel lining support and a damage-susceptible viscoplastic medium is investigated. First, back-analysis of the time-dependent behaviour of a drift excavated across a carboniferous rock mass which exhibited large delayed displacements was undertaken. Drift closure was simulated using an elasto-viscoplastic constitutive model that included the strength degradation process. This 3D numerical simulation was performed taking into account both stage construction sequence and rate of excavation advancement. A comparison of the numerical results with the data measured on site allowed for the calibration of the model parameters. Subsequently, the installation of a concrete lining was simulated to account for contact with the rock mass. This blind numerical simulation aimed to optimize the tunnel cross-section and establish the dimensions of a suitable concrete supporting lining. Three months after installation, the stresses measured in the concrete lining were in agreement with the numerically predicted stresses.
KW  - Damage
KW  -  viscoplasticity
KW  -  tunnel support
KW  -  soil structure interaction
KW  -  soft rock

DO  - 10.3970/cmes.2009.052.279