Estimation of the TBM penetration rate using the post-failure behavior of a rock mass and the equivalent thrust per cutter. A case study: the Amirkabir Water Transferring Tunnel of Iran

摘要: One of the most important parameters to predict cost and time tunnel excavation is penetration rate boring machine (TBM). This because advance TBM highly dependent on this parameter directly related excavation. There are several methods estimate rate, including experimental, empirical analytical methods. In study, based actual collected data from Amirkabir Water Conveyance Tunnel in Iran, a new method using drop modulus equivalent thrust per cutter proposed. The defined as slope post-failure stage stress–strain curve rock mass, an operational TBM. results show that there direct relation between cutter, inverse modulus, and, finally, power equation proposed both parameters. It emphasized function