Estimation of support required to stabilize a tunnel, especially in the vicinity of the face, is essentially a four-dimensional problem. To analyze the ground condition at the face, it is advisable to use advanced three-dimensional numerical codes. Moreover, it is possible to employ the convergence-confinement method, in a simplified manner to evaluate the ground condition in the face area. This method also enables one to assess the load imposed on a support installed behind the face of a tunnel. In this study, the convergence-confinement method was utilized to evaluate the appropriate support system for Taloun road tunnels. These tunnels which cross various rock types consist of twin-road tunnels with a service tunnel in between measuring about 5 km in length and run through the high elevation portions of the Alborz mountain range, connecting the capital city of Tehran to the north of Iran.
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Evaluation of Ground Convergence and Support System of Taloun Tunnels
Paper presented at the ISRM Regional Symposium - EUROCK 2009, Cavtat, Croatia, October 2009.
Paper Number: ISRM-EUROCK-2009-107
Published: October 29 2009
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Noorani, R., and S. Aloodari. "Evaluation of Ground Convergence and Support System of Taloun Tunnels." Paper presented at the ISRM Regional Symposium - EUROCK 2009, Cavtat, Croatia, October 2009.
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