ABSTRACT
The Konjancham conveyance tunnel is a part of the tropical water conveyance plan that is designed to transfer water to both Kermanshah and Ilam provinces in Iran. The second part of this tunnel (KT-2) is a 12 kilometers long with a diameter of 5.56 meters that is being bored using a double-shield TBM (DS-TBM) machine. The tunnel is excavated in both Aghajari and Lahbari formations, including claystone, siltstone, and sandstone. In this study, an overview of the basics of the project, including geology, engineering geology, hydrogeology, as well as the characteristics of the tunnel and the TBM, have been reviewed, firstly. Then, the field performance of the TBM is analyzed by focusing on the geological conditions and the functional parameters of the machine such as thrust force and RPM. Finally, the wear of the disc cutters was analyzed as one of the important issues in the boring process.
