Research on Stratum Identification Method Based on TBM Tunneling Characteristic Parameters

Table 4

Pearson correlation analysis.

Factor	Cutter head torque	Speed of tunneling	Average soil pressure	Thrust factor	Specific energy	Strata
Cutter head torque	1	0.438	0.610	0.755	0.730	0.725
Speed of tunneling		1	0.663	0.424	0.605	0.637
Average soil pressure			1	0.787	0.828	0.822
Thrust factor				1	0.955	0.911
Specific energy					1	0.947
Strata						1