Abstract:

The hard rock formation with high abrasiveness was encountered during TBM boring in test section of Qinling Tunnel of Hanjiang RiverWeihe River Water Conveyance Project, as a result, the disc cutters were seriously worn and the construction schedule was seriously delayed. Hence, the cutting tool abrasion should be accurately predicted so as to reduce the cutting tool abrasion and cost and rapid the construction schedule. Firstly, a theoretical prediction model for disc cutter abrasion is established based on previous study results; and then an experimental prediction model for disc cutter abrasion is established by laboratory test; finally, the theoretical prediction model and experimental prediction model are verified by field test. The results show that the experimental prediction model is with a higher accuracy and a relative error within 10%.

Key words: Qinling Tunnel, high abrasive formation, TBM cutting tool abrasion, prediction model, experimental study