Evaluating the Efficiency of a New Cutterhead Design to Counteract the Drawbacks of Excavation through Very Hard Rocks

Abstract The application of appropriate excavation equipment in difficult grounds is crucial importance and consequently improves the performance hard rock Tunnel Boring Machines (TBMs). cutterhead one main components TBMs which directly involved process, its design can highly affect cutting efficiency, overall balance head, bearing long term, wear whole face muck buckets. This paper mainly focuses on significant role a proper efficiency with reference to TBM tunneling project. Due existence very abrasive rocks path Kerman water conveyance tunnel, new was designed be applied second hand TBM. contains larger 19-inch disc cutters cutter layout. Since launched following old specific chainage two cutterheads pyroclastic could compared respect lower energy values were observed for indicator better this geological condition.