Correlation Research of TBM Tunnel Rock Mechanical Characteristics, Chiseling Specific Energy, and Abrasion Performance: Case Study of Jiaozhou Bay Subsea Tunnel in Qingdao

Table 7

Experimental verification table of chiseling specific energy and abrasion performance.

Lithology	Impact hammer weight (kg)	High impact hammer falls (m)	Observing group					Fitting group
			(MPa)			(1/10 mm)	(J/cm^3)	(1/10 mm)	(J/cm^3)
Metasandstone	1.5	1	127	49	0.121	5.059	44.534	5.058	45.617
			130	48.5	0.123	4.984	42.073	4.988	44.987
			140	47	0.195	4.764	40.463	4.737	41.682
			148	50	0.124	4.6148	35.063	4.59	36.132
			148	49.9	0.199	4.6147	34.063	4.64	36.182
Granodiorite			121.3	58.34	0.125	5.216	50.501	5.205	53.7
			122.2	49.56	0.129	5.189	49.409	5.2	53.7
			122.9	53.07	0.120	5.169	48.946	5.18	54
			125.1	56.6	0.124	5.109	48.588	5.11	54.9
			126.8	52.72	0.128	5.064	47.477	5.069	54.9