Abstract:

The wear of TBM disc cutter is analyzed by indoor test and site test in terms of geological factor and mechanical factor, so as to control and reduce the wear of disc cutter and predict the wear amount. The influencing rules of equivalent quartz content (EQC) and unconfined compressive strength (UCS) on rock abrasiveness are obtained by cement sample and rock sample test. The influencing rules of rock breaking area of disc cutter on disc cutter wear rate are obtained by carrying out comparison between imported cutterhead and cutter and homemade cutterhead and cutter. The influencing rules of field penetration index (FPI) on average wear rate of disc cutter are obtained by carrying out comparison between TBM boring parameters and cutter wear data. The study results show that: 1) The geological factors of EQC and UCS affect the wear of disc cutter together. 2) The rock breaking area is the sensitive index of cutterhead and cutter design to disc cutter wear. 3) The FPI is the sensitive index of equipment boring parameters to disc cutter wear.

Key words: fullface rock tunnel boring machine (TBM), disc cutter, cutter wear, influencing factors, sensitive index