Evaluation of the Adaptability of an EPB TBM to Tunnelling through Highly Variable Composite Strata

Table 6

Technical parameters of the EPB TBM.

Parameter	Value	Unit
Excavation diameter	6,980	mm
Diameter of shield machine	6,950/6,940/6,930	mm
Rotation speed of cutterhead	0–3.6 (inflection speed = 1.37)	rev/min
Maximum advancing speed	80	mm/min
Maximum speed	49,588	kN
Main drive power	1,120	kW
Rated torque	7,806	kN·m
Torque turnaround	9,757	kN·m
Screw conveyor (diameter/power/torque)	900/315/210	mm/kW/kN·m