Laboratory Model Test Research on Mechanical Characteristics of Anchor in Loess Tunnel under the Action of Pull-Out Load

Table 1

The measured test values and calculated value of shear stress (the first test).

Serial number	Values by dial indicator (mm)	Measured drawing force (N)	Calculated shear stress (kPa)
1	3.46	0	0
2	3.47	369	29.364
3	3.6	369	29.364
4	3.8	369	29.364
5	3.95	109	8.674
6	4.03	146	11.618
7	4.09	137	10.902
8	4.13	134	10.663
9	4.20	131	10.425
10	4.27	142	11.300
11	4.34	138	10.982
12	4.4	152	12.096
13	4.48	139	11.061
14	4.54	151	12.016
15	4.57	142	11.300
16	4.59	162	12.892
17	4.6	158	12.573
18	4.62	147	11.698