1
MSc. of Mining Engineering, Dept. of Mining, Geophysics and Petrolium, Shahroodd University, Iran
2
Assistant Professor, Dept. of Mining, Geophysics and Petrolium, Shahroodd University, Iran
Abstract
Evaluation of interaction between new and existing underground spaces is one of the important problems in tunneling in urban areas. In some cases it is necessary to excavate tunnels close to each other’s. This, in turn, will lead to important interaction between these tunnels. In this paper, using 3D numerical modeling of line 1 twin tunnels of Tabriz urban railway, excavation stability of these tunnels, using critical strain of Sakurai, have been studied. Also displacement pattern of lining in both twin tunnels (Sahand & Sabalan) have been investigated. In next step, effect of excavation of these tunnels on the subsidence of surface and adjacent buildings, using Cramer criteria and finite difference method (FLAC 3D), have been studied. For the purpose of study of the interaction effects between these tunnels, forces and moments that act on the segmental lining of each tunnel and their safety factor have been verified. Eventually, stability of pillar that lies between two tunnels, have also been evaluated. The results show that: 1-twin tunnels of Tabriz metro will be stable during excavation. 2-Surface subsidence due to excavation of these tunnels will have no important effect on existing structures.3-Safety factors varies between 5-10 on the different positions of segmental lining. 4- Pillar that lies between twin tunnels will be stable
Akbari, S., Zare, S., & Mirzaei nASIRABAD, H. (2014). Evaluation of Interaction between Line 1 Twin Tunnels of Tabriz Metro Using 3D Numerical Modelling. Journal of Analytical and Numerical Methods in Mining Engineering, 4(8), 39-53.
MLA
S Akbari; S Zare; H Mirzaei nASIRABAD. "Evaluation of Interaction between Line 1 Twin Tunnels of Tabriz Metro Using 3D Numerical Modelling". Journal of Analytical and Numerical Methods in Mining Engineering, 4, 8, 2014, 39-53.
HARVARD
Akbari, S., Zare, S., Mirzaei nASIRABAD, H. (2014). 'Evaluation of Interaction between Line 1 Twin Tunnels of Tabriz Metro Using 3D Numerical Modelling', Journal of Analytical and Numerical Methods in Mining Engineering, 4(8), pp. 39-53.
VANCOUVER
Akbari, S., Zare, S., Mirzaei nASIRABAD, H. Evaluation of Interaction between Line 1 Twin Tunnels of Tabriz Metro Using 3D Numerical Modelling. Journal of Analytical and Numerical Methods in Mining Engineering, 2014; 4(8): 39-53.
)