Babolak water conveyance in north of Iran on Babolak river is under construction. Tunnel support consists of lattice girder, rock bolt, and shotcrete. According to application of classification systems RMR and Q, rock mass in the path of primitive part of the tunnel which is excavated in Marn is evaluated weak and very weak. In first part of the paper the Closure parameters of Panet equation associated with face advance and time effect of the tunnel in five different stations are determined using optimizing Levenberg-Marquardt and Trust-Region back analysis techniques on convergence instrumentation data. In second part of the paper, Burger’s creep parameters are determined using instrumentation results in 0+603 station and Panet equation results in a back analysis performed utilizing FLAC3D. Predicted convergence results by Panet equation are in good agreement with numerical analyses.
کلید واژگان :
Water tunnel, Burger model, Back analysis, Instrumentation
