Abstract: The load distribution laws of disc cutter on different positions of cutterhead of fullface rock tunnel boring(TBM) machine are of great significance to preventing the TBM disc cutter and cutter seat from frequent overload failure. First, by upgrading the TBM boring modal experiment platform, the load monitoring system is developed for single disc cutter, and the direct acquisition of disc cutters with different types such as singleedged, center doubleedged, etc. is realized. Second, the disc cutter load and rotation speed monitoring system is developed to realize realtime acquisition and wireless transmission of disc cutter load and rotation speed data. Third, a multifunctional cutterhead with adjustable disc cutter with different specifications, adjustable cutter spacing and height differences has been manufactured, which realizes the arrangement of disc cutter in various ways. The upgrading of TBM boring modal experiment platform can provide experimental tools for the theoretical rock breaking study of load distribution laws of disc cutter and arrangement of TBM cuterhead and cutter, and as well provide a new method for realtime monitoring of TBM disc cutter loads.

Key words: experiment platform upgrade, cutterhead and cutters, load test, rotation speed monitoring, TBM boring modal experiment platform