A New Evaluation Method for the Uniaxial Compressive Strength ahead of the Tunnel Face Based on the Driving Data and Specification Parameters of TBM

Table 2

Driving data and specification parameters from 14 TBM tunnels.

No.	Tunnel names	TBM parameters		Excavation parameters
		Cutter diameter (m)	Cutter number	Average rock strength (MPa)	Average penetration (mm/rev)	Average torque (kN·m)
1	Hiraya	0.394	19	76.8	6.8	210
2	Nikengoya	0.394	20	53.4	7.7	210
3	Doushi	0.3556	27	67	8.2	310
4	Ogouchi	0.3556	34	76.6	3.1	120
5	Shinyuyama	0.432	27	57.4	6.9	250
6	Maiko	0.394	37	140	3.2	470
7	Tsukui	0.432	37	84.7	5.9	590
8	Tolo	0.432	25	120	4.4	300
9	ChaiWan	0.4826	32	122.7	4.3	900
10	ZWCT	0.432	42	75	7	850
11	GWCT	0.432	32	135	5	900
12	Maen	0.432	36	130	4.2	850
13	PieveI	0.432	27	156	3	541
14	Varzo	0.432	27	135	5.5	558