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

Table 7

τ^RL values of 10 standard joint profiles.

Joint number	Normal stress
	5 MPa	6 MPa	7 MPa	8 MPa
1	5.14	6.03	7.01	7.91
2	5.79	6.73	7.66	8.55
3	5.30	6.09	7.01	8.14
4	7.14	8.17	9.43	10.34
5	7.60	8.30	9.29	10.11
6	7.14	8.16	9.14	10.09
7	7.71	8.66	9.96	10.59
8	9.07	10.29	11.78	13.10
9	8.96	10.45	12.11	13.01
10	9.99	11.35	12.78	14.01