A New Method to Estimate the Joint Roughness Coefficient by Back Calculation of Shear Strength

Table 8

JRC^RL values of 10 standard joint profiles.

Joint number	Normal stress				JRC^RL	Order
	5 MPa	6 MPa	7 MPa	8 MPa
1	0.47	0.49	0.44	0.44	0.46	1
2	3.90	3.82	3.59	3.24	3.64	3
3	1.56	0.89	0.47	1.70	1.15	2
4	8.71	8.55	9.20	8.04	8.62	5
5	10.11	8.95	8.82	7.50	8.84	6
6	8.72	8.52	8.39	7.46	8.27	4
7	10.45	9.97	10.65	8.61	9.92	7
8	14.27	14.27	15.14	13.62	14.33	8
9	13.96	14.68	15.90	13.46	14.50	9
10	16.64	16.86	17.41	15.26	16.54	10