Gukan water convey tunnel is located in west of Isfahan province, central Iran. Tunnel length has been predicted to reach about 22 km. The main function of the tunnel is to convey the water from Dez River to Zayanderod River. Main rock formations in this route include limestone, marly limestone and marl. This paper deals with the study of the limestone behavior which is called Jahrom formation. This formation is encountered in the entrance and the middle of the tunnel. In present research, this formation has been classified using different rock classification such as RMR, Q, and others. Then, rock mass characteristics have been deduced from RMR classification. Finally, it is possible to select suitable support system for circular tunnel of 4m diameter, which estimated by using different proposed methods.
کلید واژگان :Stability analysis; supporting system design; tunnel.
ارزش ریالی : 500000 ریال
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